Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
121
FNUS55 KRIW 181900
FWFRIW
Fire Weather Planning Forecast for Western and Central Wyoming
National Weather Service Riverton WY
100 PM MDT Mon Aug 18 2025
.DISCUSSION...
...Yellowstone NP and Teton dispatch areas (includes fire weather
zones 140...414...415...and 416)...
Hot and dry conditions will develop and persist across the dispatch
area through the first half of the week. Above normal temperatures
and low min RH values are forecast. RH values look to drop into
the teens across lower elevations and remain around 20 percent in
the higher elevations. Light winds of 10 to 20 mph from the
southwest will prevail through the day today. Dry conditions
remain through at the earliest Thursday with increasing chances
for precipitation by the weekend.
...Cody dispatch area (includes fire weather zones 275...276...
282...283...285...286...287...288...and 289)...
Hot and dry conditions will develop and persist across the dispatch
area through the first half of the week. However, there will be a
small chance for an isolated shower or thunderstorm across far northern
zones this afternoon and evening. Above normal temperatures and
low min RH values are forecast. RH values look to drop into the
teens across lower elevations and remain around 20 percent in the
higher elevations. Light winds of 10 to 20 mph from the southwest
will prevail through the day today. Dry conditions remain through
at the earliest Thursday with increasing chances for precipitation
by the weekend.
...Casper dispatch area (includes fire weather zones 277...278...
279...280...281...285...289...and 300)...
Hot and dry conditions will develop and persist across the dispatch
area through the first half of the week. Above normal temperatures
and low min RH values are forecast. RH values look to drop into
the teens across lower elevations and remain around 20 percent in
the higher elevations. Light winds of 10 to 20 mph from the west
and south will prevail through the day today. Dry conditions
remain through at the earliest Thursday with increasing chances
for precipitation by the weekend.
...Thunderstorms imply strong gusty and erratic winds...
WYZ280-192100-
Natrona County/Casper BLM-
Including the cities of Casper and Midwest
100 PM MDT Mon Aug 18 2025
.THIS AFTERNOON...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....84-89.
24 hr trend......3 degrees warmer.
Min humidity........13-19 percent.
24 hr trend......4 percent drier.
20-foot winds.......West winds around 10 mph and gusty.
Ridge top winds.....West around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph.
Mixing Height.......13000-14200 ft agl.
Smoke dispersal.....Excellent.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....59-64.
24 hr trend......3 degrees warmer.
Max humidity........54-60 percent.
24 hr trend......6 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Downslope/downvalley 4-7 mph until 2100, then
east around 10 mph until 0300, then
downslope/downvalley 4-7 mph. Gusts up to 20
mph.
Ridge top winds.....Northeast around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast around 10 mph until 2400, then
southeast.
Mixing Height.......5600-7600 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.TUESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....90-95.
24 hr trend......6 degrees warmer.
Min humidity........10-16 percent.
24 hr trend......3 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph. Gusts up to 15 mph.
Ridge top winds.....South around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph.
Mixing Height.......2400-4400 ft agl until 1200, then 11800-13800
ft agl.
Smoke dispersal.....Poor until 1200, then very good.
.TUESDAY NIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....59-64.
24 hr trend......Unchanged.
Max humidity........51-57 percent.
24 hr trend......Unchanged.
Humidity recovery...Moderate.
20-foot winds.......Southeast winds around 10 mph with gusts to
around 25 mph.
Ridge top winds.....Southeast around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast 15 to 20 mph.
Mixing Height.......6200-8200 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....93-98.
24 hr trend......3 degrees warmer.
Min humidity........8-14 percent.
24 hr trend......1 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
southwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph until 1200, then west.
Mixing Height.......2600-4600 ft agl until 1200, then 11200-13200
ft agl.
Smoke dispersal.....Poor to fair until 1200, then very good to
excellent.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Mostly clear. Lows around 60. West winds
around 10 mph.
.THURSDAY...Not as warm. Mostly clear. Chance of showers and
slight chance of thunderstorms. Lows in the mid 50s. Highs in the
mid 80s. Northeast winds around 10 mph.
.FRIDAY...Mostly clear. Chance of showers and thunderstorms. Lows
in the mid 50s. Highs in the lower 80s. Northeast winds around
10 mph.
.SATURDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the mid 80s.
Northeast winds around 10 mph.
.SUNDAY...Partly cloudy with chance of showers and thunderstorms.
Lows in the mid 50s. Highs in the lower 80s.
.MONDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms in the afternoon. Highs in the lower 80s.
$$
WYZ283-192100-
Upper Wind River Basin/Wind River Basin-
Including the cities of Crowheart, Lander, Riverton, and Shoshoni
100 PM MDT Mon Aug 18 2025
.THIS AFTERNOON...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....81-86.
24 hr trend......3 degrees warmer.
Min humidity........13-19 percent.
24 hr trend......6 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....South around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph.
Mixing Height.......12400-14000 ft agl.
Smoke dispersal.....Very good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....57-62.
24 hr trend......5 degrees warmer.
Max humidity........39-45 percent.
24 hr trend......21 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Downslope/downvalley 4-7 mph until 2100, then
northeast around 10 mph until 0300, then
southwest. Gusts up to 20 mph.
Ridge top winds.....East around 10 mph until 2400, then northwest.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast 10 to 15 mph.
Mixing Height.......5600-7600 ft agl until 2400, then 600-800 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.TUESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....87-92.
24 hr trend......5 degrees warmer.
Min humidity........9-15 percent.
24 hr trend......5 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then
southeast around 10 mph. Gusts up to 15 mph.
Ridge top winds.....Southwest around 10 mph until 1200, then
southeast.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 8200-10200 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.TUESDAY NIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....56-61.
24 hr trend......1 degree cooler.
Max humidity........34-40 percent.
24 hr trend......5 percent drier.
Humidity recovery...Poor.
20-foot winds.......Downslope/downvalley 4-7 mph until 2100, then
southeast around 10 mph until 2400, then
southwest. Gusts up to 20 mph.
Ridge top winds.....Southeast around 10 mph until 2400, then
southwest.
Chc of wetting rain.Zero percent.
Transport winds.....South 10 to 15 mph.
Mixing Height.......5800-7800 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....90-95.
24 hr trend......3 degrees warmer.
Min humidity........10-16 percent.
24 hr trend......2 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then west
around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......1800-3800 ft agl until 1200, then 7800-9800 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Mostly clear. Lows in the lower 60s. West
winds around 10 mph.
.THURSDAY THROUGH FRIDAY...Mostly clear with slight chance of
showers and thunderstorms. Lows in the mid 50s. Highs 84 to 89.
Northeast winds around 10 mph.
.SATURDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the mid 80s. Winds
generally less than 10 mph.
.SUNDAY...Partly cloudy with chance of showers and thunderstorms.
Lows in the mid 50s. Highs in the mid 80s.
.MONDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms in the afternoon. Highs in the lower 80s.
$$
WYZ285-192100-
South Bighorn Mountains-
100 PM MDT Mon Aug 18 2025
.THIS AFTERNOON...
Sky/weather.........Partly cloudy. Areas of smoke.
Chance of thunder...0 percent.
Max temperature.....78-83.
24 hr trend......2 degrees warmer.
Min humidity........17-23 percent.
24 hr trend......4 percent drier.
20-foot winds.......West winds around 10 mph and gusty.
Ridge top winds.....West around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph.
Mixing Height.......10800-12400 ft agl.
Smoke dispersal.....Very good.
.TONIGHT...
Sky/weather.........Mostly clear. Areas of smoke in the evening.
Chance of thunder...0 percent.
Min temperature.....59-64.
24 hr trend......6 degrees warmer.
Max humidity........38-44 percent.
24 hr trend......17 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Downslope/downvalley 4-7 mph until 2100, then
east 10 to 15 mph until 0300, then southeast.
Gusts up to 30 mph.
Ridge top winds.....Northeast around 15 mph until 2400, then east.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 15 mph.
Mixing Height.......4400-6400 ft agl until 2400, then 200-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.TUESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....84-89.
24 hr trend......5 degrees warmer.
Min humidity........10-16 percent.
24 hr trend......5 percent drier.
20-foot winds.......South winds around 10 mph until 0900, then
upslope/upvalley 5-9 mph until 1200, then south
around 10 mph. Gusts up to 15 mph.
Ridge top winds.....South 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South 10 to 15 mph.
Mixing Height.......3800-5800 ft agl until 1200, then 10400-12400
ft agl.
Smoke dispersal.....Fair to good until 1200, then very good.
.TUESDAY NIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....60-65.
24 hr trend......Unchanged.
Max humidity........38-44 percent.
24 hr trend......Unchanged.
Humidity recovery...Moderate.
20-foot winds.......Southeast winds 10 to 15 mph with gusts to
around 25 mph.
Ridge top winds.....Southeast 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South 15 to 20 mph.
Mixing Height.......5000-7000 ft agl until 2400, then 200-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....86-91.
24 hr trend......2 degrees warmer.
Min humidity........9-15 percent.
24 hr trend......Unchanged.
20-foot winds.......Southwest winds around 10 mph until 1500, then
west. Gusts up to 20 mph.
Ridge top winds.....Southwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph.
Mixing Height.......3000-5000 ft agl until 1200, then 9800-11800 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good to
excellent.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Partly cloudy. Lows in the lower 60s.
Northwest winds around 10 mph.
.THURSDAY THROUGH SATURDAY...Mostly clear with slight chance of
showers and thunderstorms. Lows 52 to 57. Highs 74 to 79.
Northeast winds around 10 mph.
.SUNDAY...Partly cloudy with chance of showers and thunderstorms.
Lows in the mid 50s. Highs in the upper 70s.
.MONDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms in the afternoon. Highs in the mid 70s.
$$
WYZ281-192100-
Johnson County/Casper BLM-
Including the cities of Buffalo and Kaycee
100 PM MDT Mon Aug 18 2025
.THIS AFTERNOON...
Sky/weather.........Partly cloudy. Areas of smoke.
Chance of thunder...0 percent.
Max temperature.....81-86.
24 hr trend......2 degrees warmer.
Min humidity........20-26 percent.
24 hr trend......1 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....North around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 10 mph.
Mixing Height.......11000-13000 ft agl.
Smoke dispersal.....Very good.
.TONIGHT...
Sky/weather.........Mostly clear. Areas of smoke in the evening.
Chance of thunder...0 percent.
Min temperature.....62-67.
24 hr trend......5 degrees warmer.
Max humidity........51-57 percent.
24 hr trend......19 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Northeast winds around 10 mph until 2400, then
downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....Northeast around 15 mph until 2400, then
southwest.
Chc of wetting rain.Zero percent.
Transport winds.....East around 15 mph until 2400, then south.
Mixing Height.......5000-7000 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.TUESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....89-94.
24 hr trend......7 degrees warmer.
Min humidity........12-18 percent.
24 hr trend......6 percent drier.
20-foot winds.......South winds around 10 mph with higher gusts.
Ridge top winds.....South around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 15 mph.
Mixing Height.......2600-4600 ft agl until 1200, then 11400-13400
ft agl.
Smoke dispersal.....Poor to fair until 1200, then very good to
excellent.
.TUESDAY NIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....63-68.
24 hr trend......2 degrees warmer.
Max humidity........42-48 percent.
24 hr trend......6 percent drier.
Humidity recovery...Moderate.
20-foot winds.......South winds around 10 mph with gusts to around
25 mph.
Ridge top winds.....South around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South 15 to 20 mph.
Mixing Height.......5800-7800 ft agl until 2400, then 400-1000 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....92-97.
24 hr trend......2 degrees warmer.
Min humidity........11-17 percent.
24 hr trend......1 percent drier.
20-foot winds.......South winds 10 to 15 mph with gusts to around
25 mph.
Ridge top winds.....South around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph.
Mixing Height.......3000-5000 ft agl until 1200, then 11200-13200
ft agl.
Smoke dispersal.....Fair to good until 1200, then excellent.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Mostly clear. Lows in the mid 60s. Northwest
winds around 10 mph.
.THURSDAY...Not as warm. Mostly clear. Chance of showers and
thunderstorms. Lows in the upper 50s. Highs in the mid 80s. North
winds around 10 mph.
.FRIDAY...Partly cloudy. Chance of showers and thunderstorms.
Lows in the mid 50s. Highs around 80. Northeast winds around
10 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the lower 80s. Winds
generally less than 10 mph.
.SUNDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the upper 50s. Highs in the lower 80s.
.MONDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms in the afternoon. Highs in the mid 80s.
$$
WYZ282-192100-
South Bighorn Basin/Worland BLM-
Including the cities of Ten Sleep, Thermopolis, and Worland
100 PM MDT Mon Aug 18 2025
.THIS AFTERNOON...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms early in the evening. Areas of
smoke through the day. Chance of precipitation
20 percent.
Chance of thunder...0 percent.
Max temperature.....80-85.
24 hr trend......1 degree warmer.
Min humidity........14-20 percent.
24 hr trend......3 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....East around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph.
Mixing Height.......11800-13600 ft agl.
Smoke dispersal.....Very good.
.TONIGHT...
Sky/weather.........Mostly clear. Areas of smoke in the evening.
Chance of thunder...0 percent.
Min temperature.....58-63.
24 hr trend......5 degrees warmer.
Max humidity........41-47 percent.
24 hr trend......19 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Downslope/downvalley 4-7 mph until 2100, then
east around 10 mph until 2400, then south until
0300, then downslope/downvalley 4-7 mph. Gusts
up to 25 mph.
Ridge top winds.....East around 10 mph until 2400, then south.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 15 mph.
Mixing Height.......5200-7200 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.TUESDAY...
Sky/weather.........Mostly sunny. Areas of smoke late in the
afternoon.
Chance of thunder...0 percent.
Max temperature.....86-91.
24 hr trend......6 degrees warmer.
Min humidity........8-14 percent.
24 hr trend......5 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then south
around 10 mph. Gusts up to 15 mph.
Ridge top winds.....South around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph.
Mixing Height.......1600-3600 ft agl until 1200, then 9200-11200 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.TUESDAY NIGHT...
Sky/weather.........Mostly clear. Areas of smoke in the evening.
Chance of thunder...0 percent.
Min temperature.....60-65.
24 hr trend......Unchanged.
Max humidity........34-40 percent.
24 hr trend......6 percent drier.
Humidity recovery...Poor.
20-foot winds.......South winds 10 to 15 mph with gusts to around
25 mph.
Ridge top winds.....South around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South 15 to 20 mph.
Mixing Height.......5600-7600 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....88-93.
24 hr trend......2 degrees warmer.
Min humidity........8-14 percent.
24 hr trend......1 percent wetter.
20-foot winds.......South winds around 10 mph until 0900, then
upslope/upvalley 5-9 mph until 1500, then
northwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....South around 10 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1200, then west.
Mixing Height.......1800-3800 ft agl until 1200, then 7600-9600 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Partly cloudy. Lows in the lower 60s.
Northwest winds around 10 mph.
.THURSDAY THROUGH SATURDAY...Mostly clear with slight chance of
showers and thunderstorms. Lows in the upper 50s. Highs 85 to 90.
North winds around 10 mph.
.SUNDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the upper 50s. Highs in the mid 80s.
.MONDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms in the afternoon. Highs in the mid 80s.
$$
WYZ275-192100-
North Bighorn Basin/Worland BLM-
Including the cities of Greybull, Lovell, and Powell
100 PM MDT Mon Aug 18 2025
.THIS AFTERNOON...
Sky/weather.........Partly cloudy. Areas of smoke through the day.
Chance of thunder...10 percent.
Max temperature.....78-83.
24 hr trend......2 degrees warmer.
Min humidity........16-22 percent.
24 hr trend......3 percent drier.
20-foot winds.......South winds around 10 mph with higher gusts.
Ridge top winds.....South around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph.
Mixing Height.......11000-12400 ft agl.
Smoke dispersal.....Very good.
.TONIGHT...
Sky/weather.........Partly cloudy. Areas of smoke in the evening.
Chance of thunder...0 percent.
Min temperature.....57-62.
24 hr trend......4 degrees warmer.
Max humidity........45-51 percent.
24 hr trend......20 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Southeast winds around 10 mph until 2100, then
northeast until 2400, then downslope/downvalley
4-7 mph. Gusts up to 15 mph.
Ridge top winds.....East around 15 mph until 2400, then southwest.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast 10 to 15 mph.
Mixing Height.......4600-6600 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.TUESDAY...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....84-89.
24 hr trend......6 degrees warmer.
Min humidity........8-14 percent.
24 hr trend......6 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southeast around 10 mph. Gusts up to 20 mph.
Ridge top winds.....South 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South 10 to 15 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 8000-10000 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.TUESDAY NIGHT...
Sky/weather.........Mostly clear. Areas of smoke in the late
evening and early morning.
Chance of thunder...0 percent.
Min temperature.....61-66.
24 hr trend......1 degree warmer.
Max humidity........32-38 percent.
24 hr trend......10 percent drier.
Humidity recovery...Poor.
20-foot winds.......Southeast winds around 10 mph with gusts to
around 25 mph.
Ridge top winds.....Southeast around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 15 mph.
Mixing Height.......5400-7400 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....87-92.
24 hr trend......2 degrees warmer.
Min humidity........8-14 percent.
24 hr trend......1 percent wetter.
20-foot winds.......South winds around 10 mph until 0900, then
upslope/upvalley 5-9 mph until 1200, then south
around 10 mph. Gusts up to 20 mph.
Ridge top winds.....South 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1200, then west.
Mixing Height.......1000-3000 ft agl until 1200, then 6400-8400 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Partly cloudy. Lows in the lower 60s.
Northwest winds around 10 mph.
.THURSDAY THROUGH SATURDAY...Mostly clear with slight chance of
showers and thunderstorms. Lows in the upper 50s. Highs 83 to 88.
Northwest winds around 10 mph.
.SUNDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the upper 50s. Highs in the mid 80s.
.MONDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms in the afternoon. Highs in the mid 80s.
$$
WYZ276-192100-
Cody Foothills-
Including the cities of Clark, Cody, and Meeteetse
100 PM MDT Mon Aug 18 2025
.THIS AFTERNOON...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms through the day. Chance of
precipitation 20 percent.
Chance of thunder...10 percent.
Max temperature.....79-84.
24 hr trend......3 degrees warmer.
Min humidity........20-26 percent.
24 hr trend......4 percent drier.
20-foot winds.......Southeast winds around 10 mph with higher
gusts.
Ridge top winds.....Southeast around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 15 mph.
Mixing Height.......10000-12000 ft agl.
Smoke dispersal.....Very good to excellent.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....58-63.
24 hr trend......5 degrees warmer.
Max humidity........40-46 percent.
24 hr trend......19 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Southeast winds around 10 mph until 2100, then
downslope/downvalley 4-7 mph until 2400, then
southwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......3800-5800 ft agl until 2400, then 600-1000 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.TUESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....86-91.
24 hr trend......7 degrees warmer.
Min humidity........11-17 percent.
24 hr trend......9 percent drier.
20-foot winds.......Southwest winds around 10 mph until 0900, then
upslope/upvalley 5-9 mph until 1200, then
southeast around 10 mph. Gusts up to 20 mph.
Ridge top winds.....South around 10 mph until 1200, then southeast.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......3000-5000 ft agl until 1200, then 10600-12600
ft agl.
Smoke dispersal.....Poor to fair until 1200, then very good to
excellent.
.TUESDAY NIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....61-66.
24 hr trend......1 degree warmer.
Max humidity........24-30 percent.
24 hr trend......15 percent drier.
Humidity recovery...Poor.
20-foot winds.......South winds around 10 mph until 2400, then
southwest. Gusts up to 15 mph.
Ridge top winds.....Southwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph.
Mixing Height.......5800-7800 ft agl until 2400, then 600-1000 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...10 percent.
Max temperature.....86-91.
24 hr trend......1 degree warmer.
Min humidity........15-21 percent.
24 hr trend......2 percent wetter.
20-foot winds.......Southwest winds around 10 mph with higher
gusts.
Ridge top winds.....Southwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph.
Mixing Height.......2800-4800 ft agl until 1200, then 7600-9600 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Mostly clear. Lows in the lower 60s. West
winds around 10 mph.
.THURSDAY THROUGH FRIDAY...Mostly clear with slight chance of
showers and thunderstorms. Lows in the mid 50s. Highs 77 to 82.
North winds around 10 mph.
.SATURDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs around 80. Winds
generally less than 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with chance of showers and
thunderstorms. Lows in the upper 50s. Highs in the lower 80s.
$$
WYZ287-192100-
Owl Creek Mountains-
100 PM MDT Mon Aug 18 2025
.THIS AFTERNOON...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms early in the evening. Areas of
smoke through the day. Chance of precipitation
20 percent.
Chance of thunder...10 percent.
Max temperature.....78-83.
24 hr trend......2 degrees warmer.
Min humidity........15-21 percent.
24 hr trend......2 percent drier.
20-foot winds.......South winds around 10 mph and gusty.
Ridge top winds.....South around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph.
Mixing Height.......10200-12200 ft agl.
Smoke dispersal.....Very good.
.TONIGHT...
Sky/weather.........Mostly clear. Areas of smoke in the evening.
Chance of thunder...0 percent.
Min temperature.....59-64.
24 hr trend......6 degrees warmer.
Max humidity........33-39 percent.
24 hr trend......21 percent drier.
Humidity recovery...Poor.
20-foot winds.......Downslope/downvalley 4-7 mph until 0300, then
south around 10 mph. Gusts up to 15 mph.
Ridge top winds.....Southeast around 10 mph until 2400, then
southwest.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph.
Mixing Height.......4400-6400 ft agl until 2400, then 200-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.TUESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....83-88.
24 hr trend......5 degrees warmer.
Min humidity........8-14 percent.
24 hr trend......6 percent drier.
20-foot winds.......Southwest winds around 10 mph until 0900, then
upslope/upvalley 5-9 mph until 1200, then south
around 10 mph. Gusts up to 20 mph.
Ridge top winds.....South 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South 10 to 15 mph.
Mixing Height.......2800-4800 ft agl until 1200, then 9400-11400 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.TUESDAY NIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....58-63.
24 hr trend......Unchanged.
Max humidity........28-34 percent.
24 hr trend......9 percent drier.
Humidity recovery...Poor.
20-foot winds.......South winds around 10 mph until 0300, then
southwest. Gusts up to 15 mph.
Ridge top winds.....South around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 15 mph.
Mixing Height.......5000-7000 ft agl until 2400, then 200-600 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....83-88.
24 hr trend......1 degree warmer.
Min humidity........10-16 percent.
24 hr trend......2 percent wetter.
20-foot winds.......Southwest winds around 10 mph with higher
gusts.
Ridge top winds.....Southwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph.
Mixing Height.......2600-4600 ft agl until 1200, then 8400-10400 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Partly cloudy. Lows in the lower 60s.
Northwest winds around 10 mph.
.THURSDAY THROUGH FRIDAY...Mostly clear with slight chance of
showers and thunderstorms. Lows in the mid 50s. Highs 77 to 82.
North winds around 10 mph.
.SATURDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the upper 50s. Highs in the upper 70s.
Winds generally less than 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with chance of showers and
thunderstorms. Lows in the upper 50s. Highs 76 to 81.
$$
WYZ286-192100-
Absaroka Mountains/North Shoshone NF-
Including the city of Pahaska
100 PM MDT Mon Aug 18 2025
.THIS AFTERNOON...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms. Chance of precipitation 20
percent.
Chance of thunder...10 percent.
Max temperature.....71-76.
24 hr trend......3 degrees warmer.
Min humidity........23-29 percent.
24 hr trend......7 percent drier.
20-foot winds.......Southwest winds around 10 mph with gusts to
around 25 mph.
Ridge top winds.....Southwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 20 mph.
Mixing Height.......9600-11600 ft agl.
Smoke dispersal.....Very good to excellent.
.TONIGHT...
Sky/weather.........Partly cloudy then becoming clear.
Chance of thunder...0 percent.
Min temperature.....50-55.
24 hr trend......6 degrees warmer.
Max humidity........47-53 percent.
24 hr trend......31 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Southwest winds around 10 mph until 2100, then
downslope/downvalley 4-7 mph until 2400, then
southwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Southwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph.
Mixing Height.......4000-6000 ft agl until 2400, then 400-1200 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.TUESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....78-83.
24 hr trend......5 degrees warmer.
Min humidity........12-18 percent.
24 hr trend......9 percent drier.
20-foot winds.......Southwest winds around 10 mph and gusty.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......3200-5200 ft agl until 1200, then 9600-11600 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.TUESDAY NIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....54-59.
24 hr trend......3 degrees warmer.
Max humidity........28-34 percent.
24 hr trend......15 percent drier.
Humidity recovery...Poor.
20-foot winds.......Southwest winds around 10 mph and gusty.
Ridge top winds.....Southwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph.
Mixing Height.......5000-7000 ft agl until 2400, then 400-1000 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Slight chance of showers and thunderstorms in
the afternoon. Chance of precipitation 20
percent.
Chance of thunder...10 percent.
Max temperature.....79-84.
24 hr trend......1 degree warmer.
Min humidity........16-22 percent.
24 hr trend......4 percent wetter.
20-foot winds.......West winds 10 to 15 mph. Gusts up to 20 mph
until 1200, then 30 mph.
Ridge top winds.....West 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 15 to 20 mph.
Mixing Height.......3200-5200 ft agl until 1200, then 7800-9800 ft
agl.
Smoke dispersal.....Fair to good until 1200, then very good to
excellent.
.Forecast days 3 through 7......
.WEDNESDAY THROUGH FRIDAY...Mostly clear with slight chance of
showers and thunderstorms. Lows 48 to 53. Highs 70 to 75. East
winds around 10 mph.
.SATURDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the lower 70s.
Northwest winds around 10 mph.
.SUNDAY...Partly cloudy with chance of showers and thunderstorms.
Lows around 50. Highs in the lower 70s.
.MONDAY...Partly cloudy. Slight chance of showers in the morning,
then showers likely and chance of thunderstorms in the afternoon.
Highs in the upper 60s.
$$
WYZ140-192100-
Yellowstone National Park-
Including the cities of Lake, Mammoth, and Old Faithful
100 PM MDT Mon Aug 18 2025
.THIS AFTERNOON...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....74-79.
24 hr trend......4 degrees warmer.
Min humidity........21-27 percent.
24 hr trend......9 percent drier.
20-foot winds.......Southwest winds around 15 mph with gusts to
around 25 mph.
Ridge top winds.....Southwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 20 mph.
Mixing Height.......10000-12000 ft agl.
Smoke dispersal.....Excellent.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....46-51.
24 hr trend......5 degrees warmer.
Max humidity........60-66 percent.
24 hr trend......35 percent drier.
Humidity recovery...Good.
20-foot winds.......Southwest winds around 10 mph and gusty until
2100, then downslope/downvalley 4-7 mph.
Ridge top winds.....Southwest around 10 mph until 2400, then
southeast.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 2400, then
southeast.
Mixing Height.......4400-6400 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.TUESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....79-84.
24 hr trend......4 degrees warmer.
Min humidity........12-18 percent.
24 hr trend......9 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southwest around 10 mph. Gusts up to 15 mph.
Ridge top winds.....South around 10 mph until 1200, then southwest.
Chc of wetting rain.Zero percent.
Transport winds.....South 10 to 15 mph.
Mixing Height.......2400-4400 ft agl until 1200, then 8600-10600 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good to very
good.
.TUESDAY NIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....48-53.
24 hr trend......3 degrees warmer.
Max humidity........41-47 percent.
24 hr trend......19 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 20
mph.
Ridge top winds.....South around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph.
Mixing Height.......4600-6600 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....79-84.
24 hr trend......Unchanged.
Min humidity........22-28 percent.
24 hr trend......6 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southwest 10 to 15 mph with gusts to around 30
mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1200, then southwest
around 25 mph.
Mixing Height.......2800-4800 ft agl until 1200, then 8200-10200 ft
agl.
Smoke dispersal.....Fair to good until 1200, then excellent.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Partly cloudy. Lows in the upper 40s. Winds
generally less than 10 mph.
.THURSDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 40s. Highs in the mid 70s. Winds
generally less than 10 mph.
.FRIDAY...Mostly clear. Lows in the mid 40s. Highs in the mid
70s. Winds generally less than 10 mph.
.SATURDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the mid 40s. Highs in the upper 70s. Winds
generally less than 10 mph.
.SUNDAY...Partly cloudy with chance of showers and thunderstorms.
Lows in the mid 40s. Highs in the mid 70s.
.MONDAY...Partly cloudy. Slight chance of showers in the morning,
then chance of showers and thunderstorms in the afternoon. Highs
in the lower 70s.
$$
WYZ415-192100-
North Zone Bridger Teton NF and Grand Teton NP-
Including the cities of Jackson and Moran
100 PM MDT Mon Aug 18 2025
.THIS AFTERNOON...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....73-78.
24 hr trend......5 degrees warmer.
Min humidity........19-25 percent.
24 hr trend......14 percent drier.
20-foot winds.......Southwest winds around 10 mph with higher
gusts.
Ridge top winds.....Southwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph.
Mixing Height.......10200-12200 ft agl.
Smoke dispersal.....Very good to excellent.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....46-51.
24 hr trend......5 degrees warmer.
Max humidity........50-56 percent.
24 hr trend......33 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....South around 10 mph until 2400, then southeast.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 2400, then
southeast.
Mixing Height.......4600-6600 ft agl until 2400, then 400-1000 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.TUESDAY...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....80-85.
24 hr trend......5 degrees warmer.
Min humidity........15-21 percent.
24 hr trend......8 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southwest around 10 mph. Gusts up to 15 mph.
Ridge top winds.....Southeast around 10 mph until 1200, then
southwest.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1200, then southwest.
Mixing Height.......2200-4200 ft agl until 1200, then 8200-10200 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good to very
good.
.TUESDAY NIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....49-54.
24 hr trend......3 degrees warmer.
Max humidity........41-47 percent.
24 hr trend......15 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....Southeast around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph.
Mixing Height.......4600-6600 ft agl until 2400, then 400-1000 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Slight chance of showers and thunderstorms in
the afternoon. Chance of precipitation 20
percent.
Chance of thunder...10 percent.
Max temperature.....78-83.
24 hr trend......1 degree warmer.
Min humidity........21-27 percent.
24 hr trend......6 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southwest around 10 mph with gusts to around 25
mph.
Ridge top winds.....Southeast around 10 mph until 1200, then
southwest.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1200, then southwest
around 20 mph.
Mixing Height.......2400-4400 ft agl until 1200, then 8400-10400 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Mostly clear. Lows in the lower 50s. Winds
generally less than 10 mph.
.THURSDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the upper 70s.
Winds generally less than 10 mph.
.FRIDAY...Mostly clear. Lows in the upper 40s. Highs in the upper
70s. Winds generally less than 10 mph.
.SATURDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the upper 70s.
Winds generally less than 10 mph.
.SUNDAY...Partly cloudy with chance of showers and thunderstorms.
Lows in the upper 40s. Highs in the mid 70s.
.MONDAY...Partly cloudy. Slight chance of showers in the morning,
then showers likely and chance of thunderstorms in the afternoon.
Highs in the lower 70s.
$$
WYZ416-192100-
West Wind River Mountains/East Zone Bridger Teton NF-
100 PM MDT Mon Aug 18 2025
.THIS AFTERNOON...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....69-74.
24 hr trend......1 degree warmer.
Min humidity........19-25 percent.
24 hr trend......8 percent drier.
20-foot winds.......Southwest winds around 10 mph with higher
gusts.
Ridge top winds.....Southwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph.
Mixing Height.......9400-11000 ft agl.
Smoke dispersal.....Very good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....47-52.
24 hr trend......6 degrees warmer.
Max humidity........47-53 percent.
24 hr trend......30 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....Southeast around 10 mph until 2400, then east.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 10 mph.
Mixing Height.......4200-6200 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.TUESDAY...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....73-78.
24 hr trend......5 degrees warmer.
Min humidity........12-18 percent.
24 hr trend......9 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southwest around 10 mph. Gusts up to 15 mph.
Ridge top winds.....Southeast around 10 mph until 1200, then
southwest.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1200, then southwest.
Mixing Height.......2800-4800 ft agl until 1200, then 8200-10200 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good to very
good.
.TUESDAY NIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....49-54.
24 hr trend......3 degrees warmer.
Max humidity........28-34 percent.
24 hr trend......14 percent drier.
Humidity recovery...Poor.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....Southeast around 10 mph until 2400, then east.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph.
Mixing Height.......4200-6200 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....75-80.
24 hr trend......2 degrees warmer.
Min humidity........16-22 percent.
24 hr trend......4 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southwest around 15 mph. Gusts up to 25 mph.
Ridge top winds.....South around 10 mph until 1200, then southwest
around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1200, then southwest
around 20 mph.
Mixing Height.......2800-4800 ft agl until 1200, then 9200-11200 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good to
excellent.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Mostly clear. Lows in the lower 50s. Winds
generally less than 10 mph.
.THURSDAY THROUGH FRIDAY...Mostly clear with slight chance of
showers and thunderstorms. Lows in the mid 40s. Highs in the mid
70s. North winds around 10 mph.
.SATURDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the lower 70s.
North winds around 10 mph.
.SUNDAY...Partly cloudy with chance of showers and thunderstorms.
Lows in the mid 40s. Highs around 70.
.MONDAY...Partly cloudy. Slight chance of showers in the morning,
then showers likely and chance of thunderstorms in the afternoon.
Highs in the upper 60s.
$$
WYZ288-192100-
East Wind River Mountains/South Shoshone NF-
Including the cities of Dubois and South Pass
100 PM MDT Mon Aug 18 2025
.THIS AFTERNOON...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....73-78.
24 hr trend......3 degrees warmer.
Min humidity........16-22 percent.
24 hr trend......9 percent drier.
20-foot winds.......Southwest winds around 10 mph with higher
gusts.
Ridge top winds.....Southwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph.
Mixing Height.......10400-12200 ft agl.
Smoke dispersal.....Very good to excellent.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....52-57.
24 hr trend......6 degrees warmer.
Max humidity........37-43 percent.
24 hr trend......25 percent drier.
Humidity recovery...Poor.
20-foot winds.......Southwest winds around 10 mph until 2100, then
downslope/downvalley 4-7 mph until 2400, then
southwest around 10 mph. Gusts up to 15 mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......4600-6600 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.TUESDAY...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....78-83.
24 hr trend......5 degrees warmer.
Min humidity........10-16 percent.
24 hr trend......7 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then south
around 10 mph. Gusts up to 15 mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......3200-5200 ft agl until 1200, then 9400-11400 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.TUESDAY NIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....52-57.
24 hr trend......2 degrees warmer.
Max humidity........24-30 percent.
24 hr trend......11 percent drier.
Humidity recovery...Poor.
20-foot winds.......Southwest winds around 10 mph and gusty.
Ridge top winds.....Southwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph.
Mixing Height.......4800-6800 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....79-84.
24 hr trend......2 degrees warmer.
Min humidity........15-21 percent.
24 hr trend......3 percent wetter.
20-foot winds.......Southwest winds 10 to 15 mph. Gusts up to 20
mph until 1200, then 30 mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 15 to 20 mph.
Mixing Height.......3000-5000 ft agl until 1200, then 9800-11800 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good to
excellent.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Mostly clear. Lows in the upper 50s. West
winds around 10 mph.
.THURSDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows around 50. Highs in the upper 70s. Northwest
winds around 10 mph.
.FRIDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows around 50. Highs in the lower 70s. North
winds around 10 mph.
.SATURDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the mid 70s. North
winds around 10 mph.
.SUNDAY...Partly cloudy. Chance of showers and thunderstorms.
Lows around 50. Highs in the lower 70s.
.MONDAY...Partly cloudy. Slight chance of showers in the morning,
then showers likely and chance of thunderstorms in the afternoon.
Highs in the upper 60s.
$$
WYZ414-192100-
Salt and Wyoming Ranges/West Zone Bridger Teton NF-
Including the city of Afton
100 PM MDT Mon Aug 18 2025
.THIS AFTERNOON...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....74-79.
24 hr trend......5 degrees warmer.
Min humidity........15-21 percent.
24 hr trend......14 percent drier.
20-foot winds.......Southwest winds around 10 mph and gusty.
Ridge top winds.....Southwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph.
Mixing Height.......11200-12600 ft agl.
Smoke dispersal.....Very good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....44-49.
24 hr trend......5 degrees warmer.
Max humidity........53-59 percent.
24 hr trend......38 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....Southwest around 10 mph until 2400, then
southeast.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 2400, then south.
Mixing Height.......5000-7000 ft agl until 2400, then 400-1000 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.TUESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....79-84.
24 hr trend......5 degrees warmer.
Min humidity........10-16 percent.
24 hr trend......6 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then
southwest around 10 mph. Gusts up to 15 mph.
Ridge top winds.....South around 10 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph.
Mixing Height.......2800-4800 ft agl until 1200, then 9400-11400 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good to very
good.
.TUESDAY NIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....49-54.
24 hr trend......5 degrees warmer.
Max humidity........35-41 percent.
24 hr trend......11 percent drier.
Humidity recovery...Poor.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 20
mph.
Ridge top winds.....Southwest around 10 mph until 2400, then
southeast.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph.
Mixing Height.......5000-7000 ft agl until 2400, then 400-1000 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....80-85.
24 hr trend......1 degree warmer.
Min humidity........15-21 percent.
24 hr trend......5 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southwest 10 to 15 mph with gusts to around 25
mph.
Ridge top winds.....South around 10 mph until 1200, then southwest.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......3200-5200 ft agl until 1200, then 10200-12200
ft agl.
Smoke dispersal.....Poor to fair until 1200, then very good to
excellent.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Mostly clear. Lows in the mid 50s. Winds
generally less than 10 mph.
.THURSDAY THROUGH FRIDAY...Mostly clear with slight chance of
showers and thunderstorms. Lows in the lower 50s. Highs around
80. Winds generally less than 10 mph.
.SATURDAY...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows in the lower 50s. Highs in the
upper 70s. Winds generally less than 10 mph.
.SUNDAY...Partly cloudy with chance of showers and thunderstorms.
Lows around 50. Highs in the mid 70s.
.MONDAY...Partly cloudy. Chance of showers in the morning, then
showers likely and chance of thunderstorms in the afternoon.
Highs in the lower 70s.
$$
WYZ277>279-192100-
Lincoln and Uinta Counties/Lower Elevations-
Upper Green River Basin/Rock Springs BLM-
Sweetwater County/Rock Springs BLM/Flaming Gorge NRA-
Including the cities of Evanston, Fort Bridger, Kemmerer,
Big Piney, Farson, Pinedale, Green River, Rock Springs,
and Wamsutter
100 PM MDT Mon Aug 18 2025
.THIS AFTERNOON...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....75-80.
24 hr trend......4 degrees warmer.
Min humidity........13-19 percent.
24 hr trend......7 percent drier.
20-foot winds.......Southwest winds around 10 mph and gusty.
Ridge top winds.....Southwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph.
Mixing Height.......12400-13200 ft agl.
Smoke dispersal.....Very good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....48-53.
24 hr trend......3 degrees warmer.
Max humidity........47-53 percent.
24 hr trend......27 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....West around 10 mph until 2400, then north.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 2400, then north.
Mixing Height.......5600-7600 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.TUESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....79-84.
24 hr trend......4 degrees warmer.
Min humidity........10-16 percent.
24 hr trend......5 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph. Gusts up to 15 mph.
Ridge top winds.....Southwest around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph.
Mixing Height.......1800-3800 ft agl until 1200, then 9000-11000 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.TUESDAY NIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....50-55.
24 hr trend......Unchanged.
Max humidity........34-40 percent.
24 hr trend......9 percent drier.
Humidity recovery...Poor.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....Northeast around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 10 mph until 2400, then east.
Mixing Height.......5200-7200 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....82-87.
24 hr trend......3 degrees warmer.
Min humidity........14-20 percent.
24 hr trend......3 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southwest around 10 mph with gusts to around 25
mph.
Ridge top winds.....South around 10 mph until 1200, then southwest.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......2400-4400 ft agl until 1200, then 9600-11600 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Mostly clear. Lows in the mid 50s. Winds
generally less than 10 mph.
.THURSDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the mid 80s. Winds
generally less than 10 mph.
.FRIDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the mid 80s. North
winds around 10 mph.
.SATURDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the mid 80s. Winds
generally less than 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with chance of showers and
thunderstorms. Lows in the lower 50s. Highs 77 to 82.
$$
WYZ289-192100-
Granite/Green/Ferris/Rattlesnake Mountains-
Including the city of Jeffrey City
100 PM MDT Mon Aug 18 2025
.THIS AFTERNOON...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....79-84.
24 hr trend......3 degrees warmer.
Min humidity........9-15 percent.
24 hr trend......8 percent drier.
20-foot winds.......West winds around 10 mph and gusty.
Ridge top winds.....West around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph.
Mixing Height.......12800-13600 ft agl.
Smoke dispersal.....Very good to excellent.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....55-60.
24 hr trend......4 degrees warmer.
Max humidity........41-47 percent.
24 hr trend......21 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....Northwest around 10 mph until 2400, then east.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast around 10 mph until 2400, then east.
Mixing Height.......5600-7600 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.TUESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....83-88.
24 hr trend......4 degrees warmer.
Min humidity........8-14 percent.
24 hr trend......5 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then south
around 10 mph. Gusts up to 15 mph.
Ridge top winds.....South around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph.
Mixing Height.......3000-5000 ft agl until 1200, then 10800-12800
ft agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.TUESDAY NIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....55-60.
24 hr trend......1 degree cooler.
Max humidity........41-47 percent.
24 hr trend......3 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......Downslope/downvalley 4-7 mph until 2400, then
southeast around 10 mph until 0300, then
downslope/downvalley 4-7 mph. Gusts up to 20
mph.
Ridge top winds.....Southeast around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South 10 to 15 mph.
Mixing Height.......5600-7600 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....87-92.
24 hr trend......3 degrees warmer.
Min humidity........7-13 percent.
24 hr trend......1 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
southwest around 10 mph with gusts to around 25
mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......2600-4600 ft agl until 1200, then 10800-12800
ft agl.
Smoke dispersal.....Poor to fair until 1200, then very good to
excellent.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Mostly clear. Lows in the upper 50s. Winds
generally less than 10 mph.
.THURSDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the mid 80s. North
winds around 10 mph.
.FRIDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the lower 80s.
Northeast winds around 10 mph.
.SATURDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the lower 80s. Winds
generally less than 10 mph.
.SUNDAY...Partly cloudy. Chance of showers and thunderstorms.
Lows in the mid 50s. Highs around 80.
.MONDAY...Partly cloudy. Slight chance of showers in the morning,
then chance of showers and slight chance of thunderstorms in the
afternoon. Highs in the upper 70s.
$$
WYZ300-192100-
Casper Mountain-
100 PM MDT Mon Aug 18 2025
.THIS AFTERNOON...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....79-84.
24 hr trend......3 degrees warmer.
Min humidity........14-20 percent.
24 hr trend......7 percent drier.
20-foot winds.......West winds around 10 mph and gusty.
Ridge top winds.....West around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph.
Mixing Height.......12400-13400 ft agl.
Smoke dispersal.....Very good to excellent.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....58-63.
24 hr trend......5 degrees warmer.
Max humidity........51-57 percent.
24 hr trend......3 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Downslope/downvalley 4-7 mph until 2100, then
southeast 10 to 15 mph. Gusts up to 20 mph.
Ridge top winds.....Northeast around 15 mph until 2400, then
southeast.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast around 15 mph until 2400, then
southeast.
Mixing Height.......5200-7200 ft agl until 2400, then 200-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.TUESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....84-89.
24 hr trend......5 degrees warmer.
Min humidity........13-19 percent.
24 hr trend......1 percent drier.
20-foot winds.......Southeast winds around 10 mph until 0900, then
upslope/upvalley 5-9 mph until 1500, then east
around 10 mph. Gusts up to 15 mph.
Ridge top winds.....South around 10 mph until 1200, then east.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph.
Mixing Height.......4600-6600 ft agl until 1200, then 11400-13400
ft agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.TUESDAY NIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....58-63.
24 hr trend......Unchanged.
Max humidity........53-59 percent.
24 hr trend......4 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......Southeast winds 10 to 15 mph with gusts to
around 30 mph.
Ridge top winds.....Southeast 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast 20 to 25 mph.
Mixing Height.......5000-7000 ft agl until 2400, then 200-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....86-91.
24 hr trend......2 degrees warmer.
Min humidity........10-16 percent.
24 hr trend......3 percent drier.
20-foot winds.......South winds around 10 mph until 0900, then
upslope/upvalley 5-9 mph. Gusts up to 15 mph.
Ridge top winds.....South around 10 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1200, then northwest.
Mixing Height.......3200-5200 ft agl until 1200, then 11800-13800
ft agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Mostly clear. Lows in the upper 50s. South
winds around 10 mph.
.THURSDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the mid 50s. Highs in the lower 80s.
Northeast winds around 10 mph.
.FRIDAY...Mostly clear. Chance of showers and thunderstorms. Lows
in the lower 50s. Highs in the mid 70s. East winds around 10 mph.
.SATURDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the upper 70s. Winds
generally less than 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the mid 70s.
$$