Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
225
FNUS55 KRIW 150653
FWFRIW
Fire Weather Planning Forecast for Western and Central Wyoming
National Weather Service Riverton WY
1253 AM MDT Tue Sep 15 2026
.DISCUSSION...
...Yellowstone NP and Teton dispatch areas (includes fire weather
zones 140...414...415...and 416)...
Today will be a dry day with near normal temperatures. Relative
humidity should remain above critical levels. Wind should remain
light to moderate. Mixing and smoke dispersal will be generally good
to very good in the afternoon. Some showers will move into Zone 414
tonight, especially after midnight. From Wednesday through Friday,
some showers will be possible each day.
...Cody dispatch area (includes fire weather zones 275...276...
282...283...285...286...287...288...and 289)...
Today will be dry with near normal temperatures. Wind should remain
light to moderate. Relative humidity should remain above critical
levels, but may fall to around 20 percent at times in the afternoon.
Mixing and smoke dispersal will be generally fair to good in the
afternoon. Increasing moisture will bring an increasing chance of
showers later in the week, especially on Thursday and Friday.
...Casper dispatch area (includes fire weather zones 277...278...
279...280...281...285...289...and 300)...
Most locations will have a dry and warm day today. An isolated
shower or thunderstorm (less than a 20 percent chance) may occur in
southern Zone 279 late today, but most locations should remain dry
through sunset. A chance of showers will spread northward tonight,
mainly in Zones 277, 278 and 279. Relative humidity should remain
above critical levels. Wind should remain light to moderate, with
breeziest conditions in Zone 277 and 281. Mixing and smoke dispersal
will be generally good to very good in the afternoon. Increasing
moisture will bring a chance of showers from Wednesday through
Friday.
...Thunderstorms imply strong gusty and erratic winds...
WYZ280-160900-
Natrona County/Casper BLM-
Including the cities of Casper and Midwest
1253 AM MDT Tue Sep 15 2026
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....71-76.
24 hr trend......1 degree cooler.
Min humidity........22-28 percent.
24 hr trend......10 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
southeast around 10 mph. Gusts up to 25 mph.
Ridge top winds.....East 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast 10 to 15 mph.
Mixing Height.......800-2800 ft agl until 1200, then 3400-5400 ft
agl.
Smoke dispersal.....Poor to fair.
.TONIGHT...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms early in the evening. Chance of
precipitation 20 percent.
Chance of thunder...0 percent.
Min temperature.....52-57.
24 hr trend......12 degrees warmer.
Max humidity........69-75 percent.
24 hr trend......3 percent wetter.
Humidity recovery...Good.
20-foot winds.......East winds around 15 mph until 2400, then
south. Gusts up to 30 mph.
Ridge top winds.....East around 20 mph until 2400, then south.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 20 mph until 2400, then
southwest.
Mixing Height.......1000-3000 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Poor.
.WEDNESDAY...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms late in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...10 percent.
Max temperature.....76-81.
24 hr trend......6 degrees warmer.
Min humidity........28-34 percent.
24 hr trend......5 percent wetter.
20-foot winds.......Southwest winds around 15 mph until 1500, then
northwest. Gusts up to 30 mph.
Ridge top winds.....West around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 20 mph.
Mixing Height.......1800-3800 ft agl until 1200, then 6000-8000 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good to very
good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Mostly cloudy. Chance of showers and slight
chance of thunderstorms in the evening, then slight chance of
showers after midnight. Lows in the upper 40s. Northeast winds
around 15 mph.
.THURSDAY...Mostly cloudy with chance of showers and slight
chance of thunderstorms. Lows in the lower 50s. Highs in the mid
70s. South winds around 10 mph.
.FRIDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the mid 40s. Highs in the upper 70s. West
winds around 15 mph.
.SATURDAY...Mostly clear. Chance of showers and slight chance of
thunderstorms. Lows in the lower 40s. Highs in the lower 70s.
Winds generally less than 10 mph.
.SUNDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 40s. Highs in the mid 70s.
.MONDAY...Mostly sunny. Highs in the upper 70s.
$$
WYZ283-160900-
Upper Wind River Basin/Wind River Basin-
Including the cities of Crowheart, Lander, Riverton, and Shoshoni
1253 AM MDT Tue Sep 15 2026
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....67-72.
24 hr trend......1 degree warmer.
Min humidity........22-28 percent.
24 hr trend......5 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then east
around 10 mph. Gusts up to 20 mph.
Ridge top winds.....East around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast 10 to 15 mph.
Mixing Height.......600-2600 ft agl until 1200, then 3400-5400 ft
agl.
Smoke dispersal.....Poor to fair.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....46-51.
24 hr trend......8 degrees warmer.
Max humidity........55-61 percent.
24 hr trend......6 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Downslope/downvalley 4-7 mph until 2100, then
southeast around 10 mph until 2400, then
southwest. Gusts up to 25 mph.
Ridge top winds.....Northeast around 10 mph until 2400, then
southwest.
Chc of wetting rain.Zero percent.
Transport winds.....East around 15 mph until 2400, then southwest.
Mixing Height.......1000-3000 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....73-78.
24 hr trend......5 degrees warmer.
Min humidity........30-36 percent.
24 hr trend......6 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then east
around 10 mph. Gusts up to 20 mph.
Ridge top winds.....West around 10 mph until 1200, then northeast.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 5800-7800 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Partly cloudy. Chance of showers and slight
chance of thunderstorms in the evening, then slight chance of
showers after midnight. Lows in the upper 40s. Northeast winds
around 10 mph.
.THURSDAY...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows in the lower 50s. Highs in the mid
70s. Winds generally less than 10 mph.
.FRIDAY THROUGH SATURDAY...Mostly clear with slight chance of
showers and thunderstorms. Lows in the mid 40s. Highs 70 to 75.
North winds around 10 mph.
.SUNDAY THROUGH MONDAY...Mostly clear. Lows in the mid 40s. Highs
73 to 78.
$$
WYZ285-160900-
South Bighorn Mountains-
1253 AM MDT Tue Sep 15 2026
.TODAY...
Sky/weather.........Sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....63-68.
24 hr trend......2 degrees warmer.
Min humidity........24-30 percent.
24 hr trend......4 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then south
10 to 15 mph. Gusts up to 20 mph.
Ridge top winds.....South around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 15 mph.
Mixing Height.......800-2800 ft agl until 1200, then 3200-5000 ft
agl.
Smoke dispersal.....Poor to fair.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....48-53.
24 hr trend......10 degrees warmer.
Max humidity........57-63 percent.
24 hr trend......8 percent drier.
Humidity recovery...Good.
20-foot winds.......Southeast winds around 15 mph until 2400, then
southwest. Gusts up to 30 mph.
Ridge top winds.....Southeast around 20 mph until 2400, then
southwest.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 20 mph until 2400, then
southwest.
Mixing Height.......800-2800 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....68-73.
24 hr trend......6 degrees warmer.
Min humidity........28-34 percent.
24 hr trend......5 percent wetter.
20-foot winds.......West winds around 10 mph until 1500, then
northeast. Gusts up to 25 mph.
Ridge top winds.....Southwest around 15 mph until 1200, then north.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph.
Mixing Height.......1600-3600 ft agl until 1200, then 4600-6600 ft
agl.
Smoke dispersal.....Fair to good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Partly cloudy. Slight chance of showers in the
evening. Lows in the upper 40s. Northeast winds around 10 mph.
.THURSDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the lower 50s. Highs in the upper 60s.
South winds around 10 mph.
.FRIDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the mid 40s. Highs in the upper 60s. West
winds around 10 mph.
.SATURDAY...Mostly clear. Chance of showers and slight chance of
thunderstorms. Lows in the lower 40s. Highs in the mid 60s. Winds
generally less than 10 mph.
.SUNDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the mid 40s. Highs in the upper 60s.
.MONDAY...Sunny. Highs in the lower 70s.
$$
WYZ281-160900-
Johnson County/Casper BLM-
Including the cities of Buffalo and Kaycee
1253 AM MDT Tue Sep 15 2026
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....64-69.
24 hr trend......Unchanged.
Min humidity........25-31 percent.
24 hr trend......4 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
southeast 10 to 15 mph. Gusts up to 25 mph.
Ridge top winds.....South around 10 mph until 1200, then southeast
around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1200, then around 20
mph.
Mixing Height.......1000-3000 ft agl until 1200, then 4000-5800 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....50-55.
24 hr trend......10 degrees warmer.
Max humidity........55-61 percent.
24 hr trend......10 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Southeast winds 10 to 15 mph until 0300, then
south. Gusts up to 30 mph.
Ridge top winds.....South 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South 15 to 20 mph.
Mixing Height.......1600-3600 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor to fair.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....68-73.
24 hr trend......3 degrees warmer.
Min humidity........30-36 percent.
24 hr trend......4 percent wetter.
20-foot winds.......Southwest winds around 10 mph until 0900, then
north until 1500, then around 20 mph. Gusts up
to 30 mph.
Ridge top winds.....Northwest around 15 mph until 1200, then north.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph until 1200, then north.
Mixing Height.......800-2800 ft agl until 1200, then 3000-4800 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Partly cloudy. Lows in the upper 40s. North
winds around 10 mph.
.THURSDAY...Mostly cloudy. Slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the upper 70s. South
winds around 10 mph.
.FRIDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the upper 40s. Highs in the upper 70s.
Northwest winds around 10 mph.
.SATURDAY...Mostly clear. Chance of showers and slight chance of
thunderstorms. Lows in the mid 40s. Highs in the lower 70s. Winds
generally less than 10 mph.
.SUNDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the mid 70s.
.MONDAY...Mostly sunny. Highs in the upper 70s.
$$
WYZ282-160900-
South Bighorn Basin/Worland BLM-
Including the cities of Ten Sleep, Thermopolis, and Worland
1253 AM MDT Tue Sep 15 2026
.TODAY...
Sky/weather.........Sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....67-72.
24 hr trend......4 degrees warmer.
Min humidity........21-27 percent.
24 hr trend......5 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southeast around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Southeast 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South 10 to 15 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 3800-5600 ft
agl.
Smoke dispersal.....Poor to fair.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....47-52.
24 hr trend......5 degrees warmer.
Max humidity........56-62 percent.
24 hr trend......9 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Southeast winds around 10 mph with gusts to
around 30 mph until 2400, then
downslope/downvalley 4-7 mph.
Ridge top winds.....Southeast around 15 mph until 2400, then
southwest.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 15 mph until 2400, then
southwest.
Mixing Height.......1000-3000 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....70-75.
24 hr trend......1 degree warmer.
Min humidity........27-33 percent.
24 hr trend......6 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then north
around 10 mph with gusts to around 25 mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......400-2400 ft agl until 1200, then 3000-5000 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Partly cloudy. Lows in the upper 40s. Winds
generally less than 10 mph.
.THURSDAY...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows in the mid 50s. Highs in the upper
70s. Winds generally less than 10 mph.
.FRIDAY THROUGH SATURDAY...Mostly clear with chance of showers
and slight chance of thunderstorms. Lows 44 to 49. Highs 72 to
77. Northwest winds around 10 mph.
.SUNDAY...Mostly clear. Lows in the mid 40s. Highs in the mid
70s.
.MONDAY...Sunny. Highs in the upper 70s.
$$
WYZ275-160900-
North Bighorn Basin/Worland BLM-
Including the cities of Greybull, Lovell, and Powell
1253 AM MDT Tue Sep 15 2026
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....62-67.
24 hr trend......Unchanged.
Min humidity........20-26 percent.
24 hr trend......4 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
southeast around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Southeast 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South 10 to 15 mph.
Mixing Height.......800-2800 ft agl until 1200, then 3800-4800 ft
agl.
Smoke dispersal.....Poor to fair.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....46-51.
24 hr trend......3 degrees warmer.
Max humidity........56-62 percent.
24 hr trend......11 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 20
mph.
Ridge top winds.....East around 10 mph until 2400, then west.
Chc of wetting rain.Zero percent.
Transport winds.....East around 10 mph until 2400, then west.
Mixing Height.......800-2800 ft agl until 2400, then 400 ft agl.
Smoke dispersal.....Poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....67-72.
24 hr trend......2 degrees warmer.
Min humidity........28-34 percent.
24 hr trend......5 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
northwest 10 to 15 mph. Gusts up to 30 mph.
Ridge top winds.....Northwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph.
Mixing Height.......400-2200 ft agl until 1200, then 2400-4200 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Partly cloudy. Lows in the upper 40s.
Northwest winds around 10 mph.
.THURSDAY...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.
.FRIDAY...Mostly clear. Chance of showers and slight chance of
thunderstorms. Lows in the upper 40s. Highs in the mid 70s.
Northwest winds around 10 mph.
.SATURDAY...Mostly clear. Chance of showers and slight chance of
thunderstorms. Lows in the mid 40s. Highs around 70. Winds
generally less than 10 mph.
.SUNDAY THROUGH MONDAY...Mostly clear. Lows in the mid 40s. Highs
73 to 78.
$$
WYZ276-160900-
Cody Foothills-
Including the cities of Clark, Cody, and Meeteetse
1253 AM MDT Tue Sep 15 2026
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....63-68.
24 hr trend......Unchanged.
Min humidity........27-33 percent.
24 hr trend......9 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
southeast 10 to 15 mph. Gusts up to 25 mph.
Ridge top winds.....South around 10 mph until 1200, then southeast
around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1200, then around 20
mph.
Mixing Height.......800-2800 ft agl until 1200, then 4000-5600 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....45-50.
24 hr trend......5 degrees warmer.
Max humidity........49-55 percent.
24 hr trend......14 percent drier.
Humidity recovery...Moderate.
20-foot winds.......East winds around 10 mph until 2100, then
downslope/downvalley 4-7 mph. Gusts up to 20
mph.
Ridge top winds.....Southwest around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 2400, then west.
Mixing Height.......1200-3200 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....65-70.
24 hr trend......Unchanged.
Min humidity........36-42 percent.
24 hr trend......9 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then north
10 to 15 mph with gusts to around 35 mph.
Ridge top winds.....Northwest around 10 mph until 1200, then
northeast around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 10 mph until 1200, then north
around 20 mph.
Mixing Height.......400-2400 ft agl until 1200, then 2600-4000 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Partly cloudy. Lows in the upper 40s. Winds
generally less than 10 mph.
.THURSDAY...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows in the lower 50s. Highs in the
lower 70s. Winds generally less than 10 mph.
.FRIDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the upper 40s. Highs around 70. West
winds around 10 mph.
.SATURDAY...Mostly clear. Chance of showers and slight chance of
thunderstorms. Lows in the mid 40s. Highs in the upper 60s. Winds
generally less than 10 mph.
.SUNDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the lower 70s.
.MONDAY...Mostly sunny. Highs in the mid 70s.
$$
WYZ287-160900-
Owl Creek Mountains-
1253 AM MDT Tue Sep 15 2026
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....62-67.
24 hr trend......1 degree warmer.
Min humidity........24-30 percent.
24 hr trend......4 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then south
10 to 15 mph. Gusts up to 25 mph.
Ridge top winds.....South around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 15 mph.
Mixing Height.......600-2600 ft agl until 1200, then 2800-4600 ft
agl.
Smoke dispersal.....Poor to fair.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....45-50.
24 hr trend......7 degrees warmer.
Max humidity........44-50 percent.
24 hr trend......16 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Downslope/downvalley 4-7 mph.
Ridge top winds.....Southwest around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph.
Mixing Height.......600-2600 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....66-71.
24 hr trend......3 degrees warmer.
Min humidity........31-37 percent.
24 hr trend......5 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
northeast around 10 mph with gusts to around 25
mph.
Ridge top winds.....North around 10 mph until 1200, then northeast.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then
northeast.
Mixing Height.......600-2600 ft agl until 1200, then 3600-5600 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Partly cloudy. Lows in the upper 40s. Winds
generally less than 10 mph.
.THURSDAY...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows in the lower 50s. Highs around 70.
South winds around 10 mph.
.FRIDAY THROUGH SATURDAY...Mostly clear with chance of showers
and slight chance of thunderstorms. Lows in the mid 40s. Highs
66 to 71. North winds around 10 mph.
.SUNDAY THROUGH MONDAY...Mostly clear. Lows in the mid 40s. Highs
69 to 74.
$$
WYZ286-160900-
Absaroka Mountains/North Shoshone NF-
Including the city of Pahaska
1253 AM MDT Tue Sep 15 2026
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....56-61.
24 hr trend......5 degrees warmer.
Min humidity........27-33 percent.
24 hr trend......3 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then south
10 to 15 mph with gusts to around 25 mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then around
20 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 4400-6400 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....37-42.
24 hr trend......8 degrees warmer.
Max humidity........55-61 percent.
24 hr trend......22 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Southwest winds around 10 mph until 2100, then
downslope/downvalley 4-7 mph until 2400, 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.......2000-4000 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Poor to fair.
.WEDNESDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Slight chance of showers and thunderstorms late
in the afternoon. Chance of precipitation 20
percent.
Chance of thunder...10 percent.
Max temperature.....59-64.
24 hr trend......3 degrees warmer.
Min humidity........34-40 percent.
24 hr trend......7 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southeast around 10 mph. Gusts up to 20 mph.
Ridge top winds.....West around 10 mph until 1200, then southeast.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph until 1200, then southwest
around 20 mph.
Mixing Height.......1800-3800 ft agl until 1200, then 4600-6600 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Partly cloudy with slight chance of showers.
Lows in the lower 40s. Winds generally less than 10 mph.
.THURSDAY...Partly cloudy with showers and slight chance of
thunderstorms. Lows in the mid 40s. Highs in the lower 60s. Winds
generally less than 10 mph.
.FRIDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the upper 30s. Highs in the upper 50s.
West winds around 10 mph.
.SATURDAY...Mostly clear. Chance of showers and slight chance of
thunderstorms. Lows in the upper 30s. Highs in the upper 50s.
Winds generally less than 10 mph.
.SUNDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the upper 30s. Highs in the lower 60s.
.MONDAY...Mostly sunny. Highs in the lower 60s.
$$
WYZ140-160900-
Yellowstone National Park-
Including the cities of Lake, Mammoth, and Old Faithful
1253 AM MDT Tue Sep 15 2026
.TODAY...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....59-64.
24 hr trend......8 degrees warmer.
Min humidity........22-28 percent.
24 hr trend......11 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southwest 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 southwest
around 20 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 5000-7000 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....32-37.
24 hr trend......5 degrees warmer.
Max humidity........69-75 percent.
24 hr trend......20 percent drier.
Humidity recovery...Good.
20-foot winds.......Downslope/downvalley 4-7 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 2400, then 400-600 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.....64-69.
24 hr trend......6 degrees warmer.
Min humidity........29-35 percent.
24 hr trend......6 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 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
around 20 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 6400-8400 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Partly cloudy. Chance of showers after
midnight. Lows around 40. Winds generally less than 10 mph.
.THURSDAY...Partly cloudy with showers and chance of
thunderstorms. Lows in the upper 30s. Highs in the lower 60s.
Winds generally less than 10 mph.
.FRIDAY...Partly cloudy with showers likely and chance of
thunderstorms. Lows in the mid 30s. Highs in the mid 50s. Winds
generally less than 10 mph.
.SATURDAY...Mostly clear. Chance of showers and slight chance of
thunderstorms. Lows in the lower 30s. Highs in the upper 50s.
Winds generally less than 10 mph.
.SUNDAY THROUGH MONDAY...Mostly clear. Lows in the mid 30s. Highs
61 to 66.
$$
WYZ415-160900-
North Zone Bridger Teton NF and Grand Teton NP-
Including the cities of Jackson and Moran
1253 AM MDT Tue Sep 15 2026
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....61-66.
24 hr trend......9 degrees warmer.
Min humidity........23-29 percent.
24 hr trend......13 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southwest 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 southwest
around 25 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 5000-7000 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....36-41.
24 hr trend......8 degrees warmer.
Max humidity........71-77 percent.
24 hr trend......14 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Southwest winds around 10 mph until 2100, then
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 10 to 15 mph.
Mixing Height.......2800-4800 ft agl until 2400, then 600 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.....64-69.
24 hr trend......3 degrees warmer.
Min humidity........37-43 percent.
24 hr trend......12 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 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 10 to 15 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 5800-7800 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Partly cloudy. Slight chance of showers and
thunderstorms in the evening, then chance of showers after
midnight. Lows in the lower 40s. Southeast winds around 10 mph.
.THURSDAY...Partly cloudy with showers and chance of
thunderstorms. Lows around 40. Highs in the lower 60s. Winds
generally less than 10 mph.
.FRIDAY...Partly cloudy with chance of showers and thunderstorms.
Lows in the mid 30s. Highs in the upper 50s. Winds generally less
than 10 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the mid 30s. Highs around 60. Winds
generally less than 10 mph.
.SUNDAY THROUGH MONDAY...Mostly clear. Lows in the mid 30s. Highs
in the mid 60s.
$$
WYZ416-160900-
West Wind River Mountains/East Zone Bridger Teton NF-
1253 AM MDT Tue Sep 15 2026
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....57-62.
24 hr trend......6 degrees warmer.
Min humidity........26-32 percent.
24 hr trend......5 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then south
10 to 15 mph. Gusts up to 25 mph.
Ridge top winds.....South 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.......800-2800 ft agl until 1200, then 4600-6600 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.TONIGHT...
Sky/weather.........Partly cloudy. Slight chance of showers after
midnight. Chance of showers 20 percent.
Chance of thunder...0 percent.
Min temperature.....37-42.
24 hr trend......9 degrees warmer.
Max humidity........78-84 percent.
24 hr trend......8 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......Southwest winds around 10 mph until 2100, then
downslope/downvalley 4-7 mph until 2400, then
southeast around 10 mph. Gusts up to 20 mph.
Ridge top winds.....South around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 15 mph.
Mixing Height.......2600-4600 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Slight chance of showers early in the morning.
Slight chance of showers and thunderstorms in
the afternoon. Chance of precipitation 20
percent.
Chance of thunder...20 percent.
Max temperature.....60-65.
24 hr trend......3 degrees warmer.
Min humidity........40-46 percent.
24 hr trend......14 percent wetter.
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.....South around 15 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 5400-7400 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good to very
good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Partly cloudy. Chance of showers and slight
chance of thunderstorms in the evening, then showers likely after
midnight. Lows in the lower 40s. East winds around 10 mph.
.THURSDAY...Partly cloudy with showers and chance of
thunderstorms. Lows in the upper 30s. Highs in the upper 50s.
Winds generally less than 10 mph.
.FRIDAY...Mostly clear. Chance of showers and thunderstorms. Lows
in the lower 30s. Highs in the mid 50s. West winds around 10 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 30s. Highs in the mid 50s. Winds
generally less than 10 mph.
.SUNDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the mid 30s. Highs in the upper 50s.
.MONDAY...Mostly sunny. Highs around 60.
$$
WYZ288-160900-
East Wind River Mountains/South Shoshone NF-
Including the cities of Dubois and South Pass
1253 AM MDT Tue Sep 15 2026
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....60-65.
24 hr trend......4 degrees warmer.
Min humidity........25-31 percent.
24 hr trend......5 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then south
10 to 15 mph with gusts to around 25 mph.
Ridge top winds.....South 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then around
25 mph.
Mixing Height.......800-2800 ft agl until 1200, then 4600-6600 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.TONIGHT...
Sky/weather.........Partly cloudy. Slight chance of showers after
midnight. Chance of showers 20 percent.
Chance of thunder...0 percent.
Min temperature.....43-48.
24 hr trend......10 degrees warmer.
Max humidity........67-73 percent.
24 hr trend......3 percent drier.
Humidity recovery...Good.
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 15 mph.
Mixing Height.......2400-4400 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Slight chance of showers in the afternoon.
Slight chance of thunderstorms early in the
afternoon. Chance of precipitation 20 percent.
Chance of thunder...10 percent.
Max temperature.....63-68.
24 hr trend......3 degrees warmer.
Min humidity........37-43 percent.
24 hr trend......10 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.....Southwest around 20 mph.
Mixing Height.......1800-3800 ft agl until 1200, then 6000-8000 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good to very
good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Mostly cloudy. Chance of showers and slight
chance of thunderstorms in the evening, then chance of showers
after midnight. Lows in the lower 40s. Winds generally less than
10 mph.
.THURSDAY...Partly cloudy with showers likely and slight chance
of thunderstorms. Lows in the mid 40s. Highs in the lower 60s.
Southwest winds around 10 mph.
.FRIDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the upper 30s. Highs in the lower 60s.
West winds around 10 mph.
.SATURDAY...Mostly clear. Chance of showers and slight chance of
thunderstorms. Lows in the upper 30s. Highs in the upper 50s.
Winds generally less than 10 mph.
.SUNDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the upper 30s. Highs in the lower 60s.
.MONDAY...Mostly sunny. Highs in the lower 60s.
$$
WYZ414-160900-
Salt and Wyoming Ranges/West Zone Bridger Teton NF-
Including the city of Afton
1253 AM MDT Tue Sep 15 2026
.TODAY...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....62-67.
24 hr trend......9 degrees warmer.
Min humidity........19-25 percent.
24 hr trend......8 percent drier.
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 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.......1000-3000 ft agl until 1200, then 5200-7200 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.TONIGHT...
Sky/weather.........Mostly clear. Slight chance of showers and
thunderstorms after midnight. Slight chance of
showers early in the morning. Chance of
precipitation 20 percent.
Chance of thunder...10 percent.
Min temperature.....37-42.
24 hr trend......9 degrees warmer.
Max humidity........76-82 percent.
24 hr trend......3 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......Southwest winds around 10 mph until 2400, then
south. Gusts up to 20 mph.
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 2400, then 600 ft agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Slight chance of showers early in the morning.
Slight chance of showers and thunderstorms in
the afternoon. Chance of precipitation 20
percent.
Chance of thunder...20 percent.
Max temperature.....64-69.
24 hr trend......2 degrees warmer.
Min humidity........36-42 percent.
24 hr trend......13 percent wetter.
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.......1600-3600 ft agl until 1200, then 6400-8400 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good to very
good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Partly cloudy. Chance of showers and slight
chance of thunderstorms in the evening, then showers likely after
midnight. Lows in the mid 40s. Southeast winds around 10 mph.
.THURSDAY...Showers and chance of thunderstorms. Lows in the
lower 40s. Highs in the mid 60s. Winds generally less than
10 mph.
.FRIDAY...Mostly clear. Chance of showers and slight chance of
thunderstorms. Lows in the mid 30s. Highs in the lower 60s. West
winds around 10 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the upper 30s. Highs in the lower 60s.
Winds generally less than 10 mph.
.SUNDAY THROUGH MONDAY...Mostly clear. Lows in the upper 30s.
Highs in the mid 60s.
$$
WYZ278-160900-
Upper Green River Basin/Rock Springs BLM-
Including the cities of Big Piney, Farson, and Pinedale
1253 AM MDT Tue Sep 15 2026
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....64-69.
24 hr trend......6 degrees warmer.
Min humidity........18-24 percent.
24 hr trend......1 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then south
around 10 mph. Gusts up to 20 mph.
Ridge top winds.....East around 10 mph until 1200, then south.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 10 mph until 1200, then
southwest around 20 mph.
Mixing Height.......400-2400 ft agl until 1200, then 4800-6800 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.TONIGHT...
Sky/weather.........Partly cloudy. Slight chance of thunderstorms
after midnight. Slight chance of showers after
midnight. Chance of precipitation 20 percent.
Chance of thunder...10 percent.
Min temperature.....39-44.
24 hr trend......10 degrees warmer.
Max humidity........81-87 percent.
24 hr trend......14 percent wetter.
Humidity recovery...Excellent.
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 south.
Mixing Height.......3400-5400 ft agl until 2400, then 400-600 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.....65-70.
24 hr trend......2 degrees warmer.
Min humidity........32-38 percent.
24 hr trend......12 percent wetter.
20-foot winds.......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.....Southwest 10 to 15 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 6200-8200 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Partly cloudy. Chance of showers and slight
chance of thunderstorms in the evening, then chance of showers
after midnight. Lows in the mid 40s. East winds around 10 mph.
.THURSDAY...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows around 40. Highs around 70. Winds
generally less than 10 mph.
.FRIDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 30s. Highs in the upper 60s.
West winds around 10 mph.
.SATURDAY...Clear. Slight chance of showers and thunderstorms.
Lows in the mid 30s. Highs in the mid 60s. Winds generally less
than 10 mph.
.SUNDAY THROUGH MONDAY...Mostly clear. Lows in the mid 30s. Highs
67 to 72.
$$
WYZ277-160900-
Lincoln and Uinta Counties/Lower Elevations-
Including the cities of Evanston, Fort Bridger, and Kemmerer
1253 AM MDT Tue Sep 15 2026
.TODAY...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....67-72.
24 hr trend......8 degrees warmer.
Min humidity........18-24 percent.
24 hr trend......1 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then south
around 10 mph with gusts to around 25 mph until
1500, then southwest with gusts to around 25
mph.
Ridge top winds.....East around 10 mph until 1200, then southwest.
Chc of wetting rain.Zero percent.
Transport winds.....East around 10 mph until 1200, then southwest
around 20 mph.
Mixing Height.......400-2000 ft agl until 1200, then 5000-7000 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.TONIGHT...
Sky/weather.........Partly cloudy. Slight chance of thunderstorms
late in the evening. Slight chance of showers
late in the evening. Chance of precipitation 20
percent.
Chance of thunder...10 percent.
Min temperature.....40-45.
24 hr trend......9 degrees warmer.
Max humidity........80-86 percent.
24 hr trend......23 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......West winds around 10 mph with gusts to around
25 mph until 2100, then downslope/downvalley
4-7 mph until 2400, then south around 10 mph
with gusts to around 15 mph until 0300, then
downslope/downvalley 4-7 mph.
Ridge top winds.....Southwest around 15 mph until 2400, then south.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph.
Mixing Height.......2800-4800 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Partly cloudy. Slight chance of showers early
in the morning. Slight chance of showers and
thunderstorms in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...10 percent.
Max temperature.....67-72.
24 hr trend......Unchanged.
Min humidity........29-35 percent.
24 hr trend......11 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southwest around 10 mph. Gusts up to 15 mph.
Ridge top winds.....South 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 15 to 20 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 6600-8600 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Partly cloudy. Chance of showers and slight
chance of thunderstorms in the evening, then chance of showers
after midnight. Lows in the mid 40s. Winds generally less than
10 mph.
.THURSDAY...Partly cloudy with showers likely and slight chance
of thunderstorms. Lows in the lower 40s. Highs around 70. Winds
generally less than 10 mph.
.FRIDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the mid 30s. Highs in the upper 60s. West
winds around 10 mph.
.SATURDAY...Clear. Lows in the mid 30s. Highs in the upper 60s.
Winds generally less than 10 mph.
.SUNDAY THROUGH MONDAY...Mostly clear. Lows in the upper 30s.
Highs around 70.
$$
WYZ279-160900-
Sweetwater County/Rock Springs BLM/Flaming Gorge NRA-
Including the cities of Green River, Rock Springs, and Wamsutter
1253 AM MDT Tue Sep 15 2026
.TODAY...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....69-74.
24 hr trend......6 degrees warmer.
Min humidity........26-32 percent.
24 hr trend......10 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.....East around 10 mph until 1200, then southwest
around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 10 mph until 1200, then
southwest around 20 mph.
Mixing Height.......600-2600 ft agl until 1200, then 5600-7600 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.TONIGHT...
Sky/weather.........Partly cloudy. Slight chance of thunderstorms
in the evening. Chance of showers through the
night. Chance of precipitation 50 percent.
Chance of thunder...20 percent.
Min temperature.....47-52.
24 hr trend......9 degrees warmer.
Max humidity........79-85 percent.
24 hr trend......34 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......South winds 10 to 15 mph with gusts to around
30 mph.
Ridge top winds.....South around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South 15 to 20 mph.
Mixing Height.......3400-5400 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Partly cloudy. Chance of showers early in the
morning. Slight chance of showers late in the
morning. Slight chance of thunderstorms in the
afternoon. Chance of precipitation 50 percent.
Chance of thunder...20 percent.
Max temperature.....67-72.
24 hr trend......1 degree cooler.
Min humidity........40-46 percent.
24 hr trend......14 percent wetter.
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.......1600-3600 ft agl until 1200, then 5800-7800 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good to very
good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Mostly cloudy. Slight chance of showers and
thunderstorms in the evening, then chance of showers after
midnight. Lows in the upper 40s. Southeast winds around 10 mph.
.THURSDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the mid 40s. Highs in the lower 70s. South
winds around 10 mph.
.FRIDAY...Mostly clear. Chance of showers and thunderstorms. Lows
around 40. Highs around 70. West winds around 10 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows around 40. Highs in the upper 60s. Winds
generally less than 10 mph.
.SUNDAY...Mostly clear. Lows in the lower 40s. Highs around 70.
.MONDAY...Mostly sunny. Slight chance of showers and
thunderstorms in the afternoon. Highs in the lower 70s.
$$
WYZ289-160900-
Granite/Green/Ferris/Rattlesnake Mountains-
Including the city of Jeffrey City
1253 AM MDT Tue Sep 15 2026
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....69-74.
24 hr trend......4 degrees warmer.
Min humidity........22-28 percent.
24 hr trend......7 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then south
around 10 mph. Gusts up to 20 mph.
Ridge top winds.....East around 10 mph until 1200, then south.
Chc of wetting rain.Zero percent.
Transport winds.....East around 10 mph until 1200, then southwest
around 20 mph.
Mixing Height.......400-2200 ft agl until 1200, then 5000-7000 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.TONIGHT...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms early in the evening. Slight
chance of showers after midnight. Chance of
precipitation 20 percent.
Chance of thunder...10 percent.
Min temperature.....47-52.
24 hr trend......10 degrees warmer.
Max humidity........73-79 percent.
24 hr trend......13 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......Southwest winds 10 to 15 mph with gusts to
around 25 mph.
Ridge top winds.....South 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph.
Mixing Height.......3200-5200 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms late in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...10 percent.
Max temperature.....71-76.
24 hr trend......2 degrees warmer.
Min humidity........30-36 percent.
24 hr trend......11 percent wetter.
20-foot winds.......Southwest winds 10 to 15 mph with gusts to
around 25 mph.
Ridge top winds.....Southwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 15 to 20 mph.
Mixing Height.......1800-3800 ft agl until 1200, then 7000-9000 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Mostly cloudy. Showers likely and slight
chance of thunderstorms in the evening, then chance of showers
after midnight. Lows in the mid 40s. East winds around 10 mph.
.THURSDAY...Mostly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the upper 40s. Highs in the lower 70s.
South winds around 10 mph.
.FRIDAY THROUGH SATURDAY...Mostly clear with slight chance of
showers and thunderstorms. Lows 39 to 44. Highs 66 to 71.
Northwest winds around 10 mph.
.SUNDAY THROUGH MONDAY...Mostly clear. Lows in the lower 40s.
Highs 69 to 74.
$$
WYZ300-160900-
Casper Mountain-
1253 AM MDT Tue Sep 15 2026
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....66-71.
24 hr trend......1 degree warmer.
Min humidity........27-33 percent.
24 hr trend......12 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then south
around 10 mph. Gusts up to 15 mph.
Ridge top winds.....Southeast 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 15 mph until 1200, then
southwest.
Mixing Height.......800-2800 ft agl until 1200, then 4800-6800 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.TONIGHT...
Sky/weather.........Partly cloudy. Slight chance of thunderstorms
early in the evening. Slight chance of showers
early in the evening. Chance of precipitation
20 percent.
Chance of thunder...20 percent.
Min temperature.....50-55.
24 hr trend......12 degrees warmer.
Max humidity........71-77 percent.
24 hr trend......10 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......South winds 10 to 15 mph with gusts to around
30 mph.
Ridge top winds.....South around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 20 mph.
Mixing Height.......1600-3600 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Slight chance of showers and thunderstorms late
in the afternoon. Chance of precipitation 20
percent.
Chance of thunder...20 percent.
Max temperature.....71-76.
24 hr trend......3 degrees warmer.
Min humidity........36-42 percent.
24 hr trend......10 percent wetter.
20-foot winds.......South winds 10 to 15 mph until 1200, then west.
Gusts up to 25 mph.
Ridge top winds.....Southwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 20 mph.
Mixing Height.......2000-4000 ft agl until 1200, then 6600-8600 ft
agl.
Smoke dispersal.....Fair to good until 1200, then very good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Mostly cloudy. Chance of showers and slight
chance of thunderstorms in the evening, then slight chance of
showers after midnight. Lows in the upper 40s. Winds generally
less than 10 mph.
.THURSDAY...Mostly cloudy with chance of showers and slight
chance of thunderstorms. Lows in the lower 50s. Highs in the
upper 60s. South winds around 10 mph.
.FRIDAY THROUGH SATURDAY...Mostly clear with chance of showers
and slight chance of thunderstorms. Lows 41 to 46. Highs 64 to
69. Northwest winds around 10 mph.
.SUNDAY THROUGH MONDAY...Mostly clear. Lows in the lower 40s.
Highs 66 to 71.
$$