Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
079
FNUS55 KRIW 210753
FWFRIW
Fire Weather Planning Forecast for Western and Central Wyoming
National Weather Service Riverton WY
153 AM MDT Fri Aug 21 2026
.DISCUSSION...
...Yellowstone NP and Teton dispatch areas (includes fire weather
zones 140...414...415...and 416)...
Today will be a rather hot day. There will be a few afternoon and
evening thunderstorms around, especially in the southern zones.
Coverage looks sparse through, generally less than 30 percent.
Relative humidity should remain above critical levels. Wind should
remain light to moderate except in and around any shower or
thunderstorm. Mixing and smoke dispersal will be generally good to
excellent in the afternoon. Deeper moisture moves in on Saturday
with a better chance of showers and thunderstorms.
...Cody dispatch area (includes fire weather zones 275...276...
282...283...285...286...287...288...and 289)...
It will be a hot day today. Increasing moisture will bring some
thunderstorms to the western and southern zones this afternoon and
evening. Storms should be isolated. with a less than 30 percent
chance at any one spot. Storms will likely contain more wind than
rain. Relative humidity will fall into the teens at times in the
afternoon. Wind should remain light to moderate except in and around
any shower or thunderstorm. Mixing and smoke dispersal will be good
to very good in the afternoon. Deeper moisture moves in on Saturday
with a better chance of showers and thunderstorms.
...Casper dispatch area (includes fire weather zones 277...278...
279...280...281...285...289...and 300)...
Today will be the hottest day of the week. Increasing moisture will
bring isolated showers and thunderstorms mainly to the Zones west of
the Divide as well as Zone 289. Elsewhere, the chance of a shower or
thunderstorm is less than 15 percent. Relative humidity will fall
into the teens at times in the afternoon. Wind should remain light
to moderate except in and around any shower or thunderstorm. Mixing
and smoke dispersal will be good to excellent in the afternoon.
Deeper moisture moves in on Saturday with a better chance of showers
and thunderstorms.
...Thunderstorms imply strong gusty and erratic winds...
WYZ280-221000-
Natrona County/Casper BLM-
Including the cities of Casper and Midwest
153 AM MDT Fri Aug 21 2026
.TODAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Patchy smoke early in the afternoon.
Chance of thunder...0 percent.
Max temperature.....91-96.
24 hr trend......3 degrees warmer.
Min humidity........14-20 percent.
24 hr trend......2 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then west
10 to 15 mph with gusts to around 25 mph until
1500, then northwest with gusts to around 25
mph.
Ridge top winds.....Southwest around 15 mph until 1200, then
northwest.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph until 1200, then
northwest.
Mixing Height.......1400-3400 ft agl until 1200, then 9400-11400 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then excellent.
.TONIGHT...
Sky/weather.........Partly cloudy. Patchy smoke early in the
evening. Patchy smoke in the late evening and
overnight.
Chance of thunder...0 percent.
Min temperature.....60-65.
24 hr trend......1 degree warmer.
Max humidity........55-61 percent.
24 hr trend......8 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......North winds 10 to 15 mph until 0300, then
downslope/downvalley 4-7 mph. Gusts up to 25
mph.
Ridge top winds.....North 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast 15 to 20 mph.
Mixing Height.......4400-6400 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.SATURDAY...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
Slight chance of showers late in the afternoon.
Slight chance of thunderstorms late in the
afternoon. Chance of showers late in the
afternoon. Chance of precipitation 30 percent.
Chance of thunder...20 percent.
Max temperature.....85-90.
24 hr trend......6 degrees cooler.
Min humidity........30-36 percent.
24 hr trend......13 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then east
around 10 mph with gusts to around 25 mph.
Ridge top winds.....East 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....East around 10 mph until 1200, then south.
Mixing Height.......600-2600 ft agl until 1200, then 5000-7000 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Mostly cloudy. Chance of showers and slight
chance of thunderstorms in the evening. Lows in the lower 60s.
South winds around 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows 55 to 60. Highs 86 to 91.
Northwest winds around 10 mph.
.TUESDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the lower 80s. Winds
generally less than 10 mph.
.WEDNESDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the upper 50s. Highs in the mid 80s.
.THURSDAY...Partly cloudy. Highs in the mid 80s.
$$
WYZ283-221000-
Upper Wind River Basin/Wind River Basin-
Including the cities of Crowheart, Lander, Riverton, and Shoshoni
153 AM MDT Fri Aug 21 2026
.TODAY...
Sky/weather.........Partly cloudy. Patchy smoke early in the
afternoon. Slight chance of showers and
thunderstorms in the afternoon. Some
thunderstorms may produce gusty winds in the
afternoon. Chance of precipitation 20 percent.
Chance of thunder...20 percent.
Max temperature.....88-93.
24 hr trend......1 degree warmer.
Min humidity........19-25 percent.
24 hr trend......4 percent wetter.
20-foot winds.......West winds around 10 mph until 0900, then
upslope/upvalley 5-9 mph until 1200, then north
around 10 mph. Gusts up to 20 mph.
Ridge top winds.....West around 10 mph until 1200, then north.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 7200-9200 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.TONIGHT...
Sky/weather.........Mostly cloudy. Slight chance of thunderstorms
early in the evening. Slight chance of showers
early in the evening. Patchy smoke in the late
evening and overnight. Some thunderstorms may
produce gusty winds early in the evening.
Chance of precipitation 20 percent.
Chance of thunder...20 percent.
Min temperature.....58-63.
24 hr trend......2 degrees warmer.
Max humidity........51-57 percent.
24 hr trend......Unchanged.
Humidity recovery...Moderate.
20-foot winds.......Northwest winds around 10 mph until 2400, then
downslope/downvalley 4-7 mph until 0300, then
northwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North around 15 mph until 2400, then east.
Mixing Height.......2600-4600 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.SATURDAY...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
Slight chance of showers and thunderstorms in
the afternoon. Chance of precipitation 20
percent.
Chance of thunder...20 percent.
Max temperature.....82-87.
24 hr trend......5 degrees cooler.
Min humidity........30-36 percent.
24 hr trend......9 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph. Gusts up to 15 mph.
Ridge top winds.....Northwest around 10 mph until 1200, then
southeast.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph.
Mixing Height.......600-2600 ft agl until 1200, then 5200-7200 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Partly cloudy. Slight chance of showers and
thunderstorms in the evening. Lows in the lower 60s. Winds
generally less than 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows 55 to 60. Highs 84 to 89. West
winds around 10 mph.
.TUESDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the lower 80s. Winds
generally less than 10 mph.
.WEDNESDAY THROUGH THURSDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the mid 50s. Highs in the mid
80s.
$$
WYZ285-221000-
South Bighorn Mountains-
153 AM MDT Fri Aug 21 2026
.TODAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Patchy smoke early in the morning. Patchy smoke
in the afternoon.
Chance of thunder...0 percent.
Max temperature.....84-89.
24 hr trend......2 degrees warmer.
Min humidity........15-21 percent.
24 hr trend......3 percent wetter.
20-foot winds.......West winds around 10 mph until 1200, then
northwest. Gusts up to 20 mph.
Ridge top winds.....West around 15 mph until 1200, then northwest.
Chc of wetting rain.Zero percent.
Transport winds.....West 15 to 20 mph.
Mixing Height.......2400-4400 ft agl until 1200, then 7800-9800 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good to
excellent.
.TONIGHT...
Sky/weather.........Partly cloudy. Patchy smoke early in the
evening. Patchy smoke in the late evening and
overnight.
Chance of thunder...0 percent.
Min temperature.....59-64.
24 hr trend......Unchanged.
Max humidity........41-47 percent.
24 hr trend......7 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......Northeast winds 10 to 15 mph until 0300, then
east. Gusts up to 25 mph.
Ridge top winds.....Northeast 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast 15 to 20 mph.
Mixing Height.......3600-5600 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.SATURDAY...
Sky/weather.........Mostly cloudy 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.....80-85.
24 hr trend......5 degrees cooler.
Min humidity........27-33 percent.
24 hr trend......12 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.....Southwest 10 to 15 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 5600-7600 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Partly cloudy. Chance of showers and slight
chance of thunderstorms in the evening. Lows in the lower 60s.
South winds around 10 mph.
.SUNDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the upper 50s. Highs in the lower 80s.
West winds around 10 mph.
.MONDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the mid 50s. Highs in the upper 70s.
West winds around 10 mph.
.TUESDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the mid 70s. Winds
generally less than 10 mph.
.WEDNESDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the upper 50s. Highs in the upper 70s.
.THURSDAY...Partly cloudy. Highs in the upper 70s.
$$
WYZ281-221000-
Johnson County/Casper BLM-
Including the cities of Buffalo and Kaycee
153 AM MDT Fri Aug 21 2026
.TODAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Patchy smoke through the day.
Chance of thunder...0 percent.
Max temperature.....86-91.
24 hr trend......Unchanged.
Min humidity........18-24 percent.
24 hr trend......4 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then south
around 10 mph and gusty until 1200, then north
with gusts to around 25 mph.
Ridge top winds.....South around 10 mph until 1200, then north.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then
northwest around 20 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 7400-9400 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.TONIGHT...
Sky/weather.........Partly cloudy then becoming mostly cloudy.
Patchy smoke early in the evening. Patchy smoke
in the late evening and overnight.
Chance of thunder...0 percent.
Min temperature.....60-65.
24 hr trend......1 degree warmer.
Max humidity........55-61 percent.
24 hr trend......9 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......North winds 10 to 15 mph with gusts to around
25 mph until 2400, then downslope/downvalley
4-7 mph.
Ridge top winds.....North 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North 10 to 15 mph.
Mixing Height.......3400-5400 ft agl until 2400, then 400 ft agl.
Smoke dispersal.....Good until 2400, then poor.
.SATURDAY...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
Slight chance of showers early in the
afternoon. Slight chance of thunderstorms early
in the afternoon. Chance of showers late in the
afternoon. Chance of precipitation 40 percent.
Chance of thunder...20 percent.
Max temperature.....82-87.
24 hr trend......5 degrees cooler.
Min humidity........32-38 percent.
24 hr trend......14 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
southeast 10 to 15 mph. Gusts up to 30 mph.
Ridge top winds.....Southeast around 10 mph until 1200, then around
20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 10 mph until 1200, then south
around 20 mph.
Mixing Height.......800-2800 ft agl until 1200, then 5000-7000 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Partly cloudy. Chance of showers and slight
chance of thunderstorms in the evening. Lows in the lower 60s.
South winds around 10 mph.
.SUNDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows around 60. Highs around 90. Winds generally
less than 10 mph.
.MONDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the upper 50s. Highs in the mid 80s.
Northwest winds around 10 mph.
.TUESDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs around 80. Winds
generally less than 10 mph.
.WEDNESDAY THROUGH THURSDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the upper 50s. Highs in the
mid 80s.
$$
WYZ282-221000-
South Bighorn Basin/Worland BLM-
Including the cities of Ten Sleep, Thermopolis, and Worland
153 AM MDT Fri Aug 21 2026
.TODAY...
Sky/weather.........Partly cloudy. Patchy smoke early in the
morning. Patchy smoke in the late morning and
afternoon.
Chance of thunder...0 percent.
Max temperature.....87-92.
24 hr trend......1 degree warmer.
Min humidity........16-22 percent.
24 hr trend......4 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then north
around 10 mph. Gusts up to 15 mph.
Ridge top winds.....Southwest around 10 mph until 1200, then north.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph until 1200, then northwest.
Mixing Height.......800-2800 ft agl until 1200, then 5600-7600 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.TONIGHT...
Sky/weather.........Partly cloudy. Patchy smoke early in the
evening. Patchy smoke in the late evening and
overnight.
Chance of thunder...0 percent.
Min temperature.....59-64.
24 hr trend......1 degree warmer.
Max humidity........39-45 percent.
24 hr trend......2 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......North winds around 10 mph until 2100, then
southwest until 0300, then downslope/downvalley
4-7 mph. Gusts up to 15 mph.
Ridge top winds.....North around 15 mph until 2400, then southwest.
Chc of wetting rain.Zero percent.
Transport winds.....North around 15 mph until 2400, then south.
Mixing Height.......3400-5400 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.SATURDAY...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
Slight chance of showers and thunderstorms
early in the afternoon. Chance of precipitation
20 percent.
Chance of thunder...20 percent.
Max temperature.....83-88.
24 hr trend......3 degrees cooler.
Min humidity........25-31 percent.
24 hr trend......7 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph. Gusts up to 15 mph.
Ridge top winds.....South around 10 mph until 1200, then southeast.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph.
Mixing Height.......600-2600 ft agl until 1200, then 5400-7400 ft
agl.
Smoke dispersal.....Poor until 1200, then fair to good.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Partly cloudy. Slight chance of showers and
thunderstorms in the evening. Lows in the lower 60s. Winds
generally less than 10 mph.
.SUNDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the lower 60s. Highs around 90. Winds
generally less than 10 mph.
.MONDAY THROUGH TUESDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the upper 50s. Highs 82 to 87.
Winds generally less than 10 mph.
.WEDNESDAY THROUGH THURSDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the upper 50s. Highs in the
mid 80s.
$$
WYZ275-221000-
North Bighorn Basin/Worland BLM-
Including the cities of Greybull, Lovell, and Powell
153 AM MDT Fri Aug 21 2026
.TODAY...
Sky/weather.........Partly cloudy. Patchy smoke through the day.
Chance of thunder...0 percent.
Max temperature.....84-89.
24 hr trend......1 degree warmer.
Min humidity........17-23 percent.
24 hr trend......4 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.....West around 10 mph until 1200, then north.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......800-2800 ft agl until 1200, then 5200-7200 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.TONIGHT...
Sky/weather.........Partly cloudy. Patchy smoke early in the
evening. Patchy smoke in the late evening and
overnight.
Chance of thunder...0 percent.
Min temperature.....58-63.
24 hr trend......1 degree warmer.
Max humidity........41-47 percent.
24 hr trend......Unchanged.
Humidity recovery...Moderate.
20-foot winds.......North winds 10 to 15 mph with gusts to around
25 mph until 2400, then northwest with gusts to
around 15 mph until 0300, then
downslope/downvalley 4-7 mph.
Ridge top winds.....North around 15 mph until 2400, then west.
Chc of wetting rain.Zero percent.
Transport winds.....North 10 to 15 mph.
Mixing Height.......2600-4600 ft agl until 2400, then 400 ft agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.SATURDAY...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
Slight chance of showers and thunderstorms
early in the afternoon. Chance of precipitation
20 percent.
Chance of thunder...20 percent.
Max temperature.....80-85.
24 hr trend......4 degrees cooler.
Min humidity........23-29 percent.
24 hr trend......6 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200. Winds
south around 10 mph with higher gusts after
1500.
Ridge top winds.....South around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph.
Mixing Height.......400-2400 ft agl until 1200, then 4600-6600 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Partly cloudy. Slight chance of showers and
thunderstorms in the evening. Lows in the lower 60s. Winds
generally less than 10 mph.
.SUNDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows around 60. Highs around 90. Winds
generally less than 10 mph.
.MONDAY THROUGH TUESDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the upper 50s. Highs 81 to 86.
Winds generally less than 10 mph.
.WEDNESDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the upper 50s. Highs in the mid 80s.
.THURSDAY...Partly cloudy. Highs in the mid 80s.
$$
WYZ276-221000-
Cody Foothills-
Including the cities of Clark, Cody, and Meeteetse
153 AM MDT Fri Aug 21 2026
.TODAY...
Sky/weather.........Partly cloudy. Patchy smoke through the day.
Chance of thunder...0 percent.
Max temperature.....84-89.
24 hr trend......Unchanged.
Min humidity........25-31 percent.
24 hr trend......5 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then north
around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Northwest around 10 mph until 1200, then north.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 4800-6800 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.TONIGHT...
Sky/weather.........Mostly cloudy. Patchy smoke early in the
evening. Patchy smoke in the late evening and
overnight.
Chance of thunder...0 percent.
Min temperature.....60-65.
24 hr trend......Unchanged.
Max humidity........46-52 percent.
24 hr trend......4 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......North winds around 10 mph and gusty until 2100,
then northwest and gusty until 2400, then
downslope/downvalley 4-7 mph.
Ridge top winds.....North around 15 mph until 2400, then southwest.
Chc of wetting rain.Zero percent.
Transport winds.....North around 15 mph until 2400, then west.
Mixing Height.......2000-4000 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.SATURDAY...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
Chance of showers and thunderstorms in the
afternoon. Chance of precipitation 50 percent.
Chance of thunder...40 percent.
Max temperature.....81-86.
24 hr trend......3 degrees cooler.
Min humidity........34-40 percent.
24 hr trend......8 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph. Gusts up to 15 mph.
Ridge top winds.....Southwest around 10 mph until 1200, then
southeast.
Chc of wetting rain.Less than 5 percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......800-2800 ft agl until 1200, then 3800-5800 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Partly cloudy. Chance of showers and slight
chance of thunderstorms in the evening. Lows in the lower 60s.
Winds generally less than 10 mph.
.SUNDAY...Partly cloudy with chance of showers and thunderstorms.
Lows in the upper 50s. Highs in the mid 80s. West winds around
10 mph.
.MONDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the upper 50s. Highs in the lower 80s.
Winds generally less than 10 mph.
.TUESDAY...Partly cloudy with chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the mid 70s. Winds
generally less than 10 mph.
.WEDNESDAY THROUGH THURSDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the mid 50s. Highs around 80.
$$
WYZ287-221000-
Owl Creek Mountains-
153 AM MDT Fri Aug 21 2026
.TODAY...
Sky/weather.........Partly cloudy. Patchy smoke in the late morning
and afternoon. Slight chance of showers and
thunderstorms in the afternoon. Some
thunderstorms may produce gusty winds in the
afternoon. Chance of precipitation 20 percent.
Chance of thunder...10 percent.
Max temperature.....82-87.
24 hr trend......Unchanged.
Min humidity........21-27 percent.
24 hr trend......6 percent wetter.
20-foot winds.......Southwest winds around 10 mph until 0900, then
upslope/upvalley 5-9 mph until 1200, then
northeast 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.....Northwest 10 to 15 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 5600-7600 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.TONIGHT...
Sky/weather.........Mostly cloudy. Slight chance of showers and
thunderstorms early in the evening. Slight
chance of showers and thunderstorms early in
the evening. Patchy smoke early in the evening.
Patchy smoke in the late evening and overnight.
Some thunderstorms may produce gusty winds
early in the evening. Some thunderstorms may
produce gusty winds early in the evening.
Chance of precipitation 20 percent.
Chance of thunder...10 percent.
Min temperature.....60-65.
24 hr trend......1 degree warmer.
Max humidity........38-44 percent.
24 hr trend......3 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......Northwest winds around 10 mph until 2400, then
downslope/downvalley 4-7 mph until 0300, then
southwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Northwest around 15 mph until 2400, then
southwest.
Chc of wetting rain.Zero percent.
Transport winds.....North around 15 mph until 2400, then southwest.
Mixing Height.......2400-4400 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.SATURDAY...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
Slight chance of showers and thunderstorms
early in the afternoon. Chance of precipitation
20 percent.
Chance of thunder...20 percent.
Max temperature.....77-82.
24 hr trend......4 degrees cooler.
Min humidity........29-35 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 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.......600-2600 ft agl until 1200, then 5000-7000 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Partly cloudy. Slight chance of showers and
thunderstorms in the evening. Lows in the lower 60s. Winds
generally less than 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with chance of showers and
thunderstorms. Lows 56 to 61. Highs 78 to 83. West winds around
10 mph.
.TUESDAY...Partly cloudy with chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the mid 70s. Winds
generally less than 10 mph.
.WEDNESDAY THROUGH THURSDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the upper 50s. Highs in the
upper 70s.
$$
WYZ286-221000-
Absaroka Mountains/North Shoshone NF-
Including the city of Pahaska
153 AM MDT Fri Aug 21 2026
.TODAY...
Sky/weather.........Partly cloudy. Patchy smoke in the morning.
Patchy smoke late in the afternoon. Slight
chance of showers and thunderstorms in the
afternoon. Some thunderstorms may produce gusty
winds in the afternoon. Chance of precipitation
20 percent.
Chance of thunder...10 percent.
Max temperature.....77-82.
24 hr trend......Unchanged.
Min humidity........24-30 percent.
24 hr trend......4 percent wetter.
20-foot winds.......West winds 10 to 15 mph until 1500, then
northwest. Gusts up to 25 mph.
Ridge top winds.....Northwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 15 to 20 mph.
Mixing Height.......2800-4800 ft agl until 1200, then 7400-9400 ft
agl.
Smoke dispersal.....Fair to good until 1200, then very good.
.TONIGHT...
Sky/weather.........Partly cloudy then becoming mostly cloudy.
Patchy smoke early in the evening. Patchy smoke
in the late evening and overnight. Slight
chance of showers and thunderstorms early in
the evening. Slight chance of showers early in
the morning. Some thunderstorms may produce
gusty winds early in the evening. Chance of
precipitation 20 percent.
Chance of thunder...10 percent.
Min temperature.....54-59.
24 hr trend......1 degree warmer.
Max humidity........53-59 percent.
24 hr trend......2 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......East winds around 10 mph until 2100, then
downslope/downvalley 4-7 mph until 0300, then
west around 10 mph. Gusts up to 20 mph.
Ridge top winds.....East around 15 mph until 2400, then southwest.
Chc of wetting rain.Zero percent.
Transport winds.....East around 15 mph until 2400, then southwest.
Mixing Height.......2000-4000 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Poor.
.SATURDAY...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
Slight chance of showers in the morning. Chance
of showers and thunderstorms in the afternoon.
Chance of precipitation 50 percent.
Chance of thunder...40 percent.
Max temperature.....73-78.
24 hr trend......6 degrees cooler.
Min humidity........37-43 percent.
24 hr trend......15 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent until 1200, then 15 percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......1800-3800 ft agl until 1200, then 4600-6600 ft
agl.
Smoke dispersal.....Fair to good.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Partly cloudy. Chance of showers and slight
chance of thunderstorms in the evening. Lows in the lower 50s.
West winds around 10 mph.
.SUNDAY THROUGH TUESDAY...Partly cloudy with chance of showers
and thunderstorms. Lows 47 to 52. Highs 67 to 72. West winds
around 10 mph.
.WEDNESDAY...Partly cloudy with chance of showers and
thunderstorms. Lows in the upper 40s. Highs around 70.
.THURSDAY...Partly cloudy. Slight chance of showers and
thunderstorms in the afternoon. Highs in the upper 60s.
$$
WYZ140-221000-
Yellowstone National Park-
Including the cities of Lake, Mammoth, and Old Faithful
153 AM MDT Fri Aug 21 2026
.TODAY...
Sky/weather.........Partly cloudy. Patchy smoke early in the
morning.
Chance of thunder...0 percent.
Max temperature.....81-86.
24 hr trend......2 degrees warmer.
Min humidity........24-30 percent.
24 hr trend......Unchanged.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
around 10 mph. Gusts up to 15 mph.
Ridge top winds.....Southwest around 10 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 7600-9600 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.TONIGHT...
Sky/weather.........Partly cloudy then becoming mostly cloudy.
Patchy smoke early in the evening. Slight
chance of showers after midnight. Chance of
showers 20 percent.
Chance of thunder...0 percent.
Min temperature.....51-56.
24 hr trend......2 degrees warmer.
Max humidity........62-68 percent.
24 hr trend......1 percent wetter.
Humidity recovery...Good.
20-foot winds.......Downslope/downvalley 4-7 mph until 2100, then
southeast around 10 mph until 0300, then
downslope/downvalley 4-7 mph. Gusts up to 15
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 south.
Mixing Height.......3400-5400 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor to fair.
.SATURDAY...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
Chance of showers and thunderstorms in the
afternoon. Chance of precipitation 50 percent.
Chance of thunder...40 percent.
Max temperature.....74-79.
24 hr trend......7 degrees cooler.
Min humidity........46-52 percent.
24 hr trend......21 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent until 1200, then 10 percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......1800-3800 ft agl until 1200, then 4400-6400 ft
agl.
Smoke dispersal.....Fair to good.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Partly cloudy. Chance of showers and
thunderstorms in the evening. Lows in the upper 40s. Winds
generally less than 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with chance of showers and
thunderstorms. Lows 43 to 48. Highs in the lower 70s. Winds
generally less than 10 mph.
.TUESDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the mid 40s. Highs in the upper 60s. Winds
generally less than 10 mph.
.WEDNESDAY THROUGH THURSDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the mid 40s. Highs 68 to 73.
$$
WYZ415-221000-
North Zone Bridger Teton NF and Grand Teton NP-
Including the cities of Jackson and Moran
153 AM MDT Fri Aug 21 2026
.TODAY...
Sky/weather.........Partly cloudy. Patchy smoke in the morning.
Slight chance of showers and thunderstorms late
in the afternoon. Some thunderstorms may
produce gusty winds late in the afternoon.
Chance of precipitation 20 percent.
Chance of thunder...20 percent.
Max temperature.....83-88.
24 hr trend......2 degrees warmer.
Min humidity........26-32 percent.
24 hr trend......1 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
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 until 1200, then west.
Mixing Height.......1800-3800 ft agl until 1200, then 8200-10200 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.TONIGHT...
Sky/weather.........Partly cloudy then becoming mostly cloudy.
Slight chance of thunderstorms early in the
evening. Slight chance of showers through the
night. Slight chance of thunderstorms in the
late evening and early morning. Some
thunderstorms may produce gusty winds early in
the evening. Chance of precipitation 20
percent.
Chance of thunder...20 percent.
Min temperature.....52-57.
24 hr trend......2 degrees warmer.
Max humidity........72-78 percent.
24 hr trend......3 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph until 2100, then
southeast around 10 mph until 0300, then
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.....Southeast around 10 mph.
Mixing Height.......2600-4600 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Poor.
.SATURDAY...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
Chance of showers and thunderstorms in the
afternoon. Chance of precipitation 50 percent.
Chance of thunder...40 percent.
Max temperature.....74-79.
24 hr trend......8 degrees cooler.
Min humidity........47-53 percent.
24 hr trend......21 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then
southwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Southeast around 10 mph until 1200, then
southwest.
Chc of wetting rain.Less than 5 percent.
Transport winds.....South around 10 mph until 1200, then southwest.
Mixing Height.......1600-3600 ft agl until 1200, then 5400-7400 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Partly cloudy. Chance of showers and
thunderstorms in the evening. Lows around 50. Winds generally
less than 10 mph.
.SUNDAY...Partly cloudy with chance of showers and thunderstorms.
Lows in the upper 40s. Highs in the lower 70s. Winds generally
less than 10 mph.
.MONDAY...Mostly cloudy. Chance of showers and thunderstorms.
Lows in the mid 40s. Highs around 70. Winds generally less than
10 mph.
.TUESDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the mid 40s. Highs around 70. Winds
generally less than 10 mph.
.WEDNESDAY THROUGH THURSDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the mid 40s. Highs 68 to 73.
$$
WYZ416-221000-
West Wind River Mountains/East Zone Bridger Teton NF-
153 AM MDT Fri Aug 21 2026
.TODAY...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms in the afternoon. Some
thunderstorms may produce gusty winds in the
afternoon. Chance of precipitation 20 percent.
Chance of thunder...20 percent.
Max temperature.....77-82.
24 hr trend......2 degrees warmer.
Min humidity........23-29 percent.
24 hr trend......2 percent wetter.
20-foot winds.......Northwest winds around 10 mph until 0900, then
upslope/upvalley 5-9 mph until 1200, then west
around 10 mph. Gusts up to 20 mph.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......2800-4800 ft agl until 1200, then 7800-9800 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.TONIGHT...
Sky/weather.........Mostly cloudy. Slight chance of thunderstorms
early in the evening. Slight chance of showers
through the night. Slight chance of
thunderstorms in the late evening and early
morning. Some thunderstorms may produce gusty
winds early in the evening. Chance of
precipitation 20 percent.
Chance of thunder...20 percent.
Min temperature.....51-56.
24 hr trend......2 degrees warmer.
Max humidity........58-64 percent.
24 hr trend......2 percent drier.
Humidity recovery...Good.
20-foot winds.......Northeast winds around 10 mph until 2400, then
downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....East 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....East 10 to 15 mph.
Mixing Height.......2000-4000 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Poor.
.SATURDAY...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
Slight chance of showers in the afternoon.
Slight chance of thunderstorms in the
afternoon. Chance of showers late in the
afternoon. Chance of precipitation 40 percent.
Chance of thunder...20 percent.
Max temperature.....70-75.
24 hr trend......7 degrees cooler.
Min humidity........38-44 percent.
24 hr trend......16 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Southeast around 10 mph until 1200, then
southwest.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 10 mph until 1200, then
southwest.
Mixing Height.......2000-4000 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......
.SATURDAY 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. Winds generally
less than 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with showers likely and
chance of thunderstorms. Lows 44 to 49. Highs 66 to 71. West
winds around 10 mph.
.TUESDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the mid 40s. Highs in the mid 60s. Winds
generally less than 10 mph.
.WEDNESDAY THROUGH THURSDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the mid 40s. Highs in the
upper 60s.
$$
WYZ288-221000-
East Wind River Mountains/South Shoshone NF-
Including the cities of Dubois and South Pass
153 AM MDT Fri Aug 21 2026
.TODAY...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms in the afternoon. Some
thunderstorms may produce gusty winds in the
afternoon. Chance of precipitation 20 percent.
Chance of thunder...20 percent.
Max temperature.....80-85.
24 hr trend......2 degrees warmer.
Min humidity........23-29 percent.
24 hr trend......4 percent wetter.
20-foot winds.......West winds around 10 mph until 1500, then
northwest. Gusts up to 20 mph.
Ridge top winds.....West around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph.
Mixing Height.......3400-5400 ft agl until 1200, then 8200-10200 ft
agl.
Smoke dispersal.....Fair to good until 1200, then very good.
.TONIGHT...
Sky/weather.........Mostly cloudy. Slight chance of thunderstorms
early in the evening. Slight chance of showers
in the evening. Slight chance of showers after
midnight. Some thunderstorms may produce gusty
winds early in the evening. Chance of
precipitation 20 percent.
Chance of thunder...20 percent.
Min temperature.....54-59.
24 hr trend......1 degree warmer.
Max humidity........52-58 percent.
24 hr trend......1 percent drier.
Humidity recovery...Moderate.
20-foot winds.......East winds around 10 mph until 2100, then
southwest. Gusts up to 20 mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph until 2400, then west.
Mixing Height.......2000-4000 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Poor.
.SATURDAY...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
Slight chance of showers and thunderstorms in
the afternoon. Chance of precipitation 20
percent.
Chance of thunder...20 percent.
Max temperature.....74-79.
24 hr trend......6 degrees cooler.
Min humidity........38-44 percent.
24 hr trend......11 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.....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 1200, then 6600-8600 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good to very
good.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Partly cloudy. Slight chance of showers and
thunderstorms in the evening. Lows in the mid 50s. West winds
around 10 mph.
.SUNDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the mid 70s. West
winds around 10 mph.
.MONDAY...Partly cloudy. Chance of thunderstorms and slight
chance of showers. Lows around 50. Highs in the lower 70s. West
winds around 10 mph.
.TUESDAY...Partly cloudy with chance of showers and
thunderstorms. Lows in the upper 40s. Highs around 70. Winds
generally less than 10 mph.
.WEDNESDAY THROUGH THURSDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the upper 40s. Highs in the
lower 70s.
$$
WYZ414-221000-
Salt and Wyoming Ranges/West Zone Bridger Teton NF-
Including the city of Afton
153 AM MDT Fri Aug 21 2026
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Slight chance of showers and thunderstorms
early in the afternoon. Some thunderstorms may
produce gusty winds early in the afternoon.
Chance of precipitation 20 percent.
Chance of thunder...20 percent.
Max temperature.....82-87.
24 hr trend......2 degrees warmer.
Min humidity........21-27 percent.
24 hr trend......1 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
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 10 to 15 mph.
Mixing Height.......2600-4600 ft agl until 1200, then 8800-10800 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good to very
good.
.TONIGHT...
Sky/weather.........Mostly cloudy. Slight chance of showers and
thunderstorms in the evening, then chance of
showers and slight chance of thunderstorms
after midnight. Some thunderstorms may produce
gusty winds early in the evening. Chance of
precipitation 40 percent.
Chance of thunder...20 percent.
Min temperature.....52-57.
24 hr trend......1 degree warmer.
Max humidity........68-74 percent.
24 hr trend......10 percent wetter.
Humidity recovery...Good.
20-foot winds.......East winds around 10 mph until 2400, then
southeast until 0300, then downslope/downvalley
4-7 mph. Gusts up to 15 mph.
Ridge top winds.....Southeast 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast 10 to 15 mph.
Mixing Height.......2400-4400 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Poor.
.SATURDAY...
Sky/weather.........Partly cloudy. Chance of showers and
thunderstorms in the afternoon. Chance of
precipitation 40 percent.
Chance of thunder...30 percent.
Max temperature.....74-79.
24 hr trend......8 degrees cooler.
Min humidity........39-45 percent.
24 hr trend......17 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.....South around 10 mph until 1200, then southwest.
Mixing Height.......2000-4000 ft agl until 1200, then 5800-7800 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Partly cloudy. Chance of showers and slight
chance of thunderstorms in the evening, then slight chance of
showers and thunderstorms after midnight. Lows in the lower 50s.
Winds generally less than 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with chance of showers and
thunderstorms. Lows 47 to 52. Highs 71 to 76. Winds generally
less than 10 mph.
.TUESDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the lower 70s.
Winds generally less than 10 mph.
.WEDNESDAY THROUGH THURSDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the upper 40s. Highs 70 to 75.
$$
WYZ278-221000-
Upper Green River Basin/Rock Springs BLM-
Including the cities of Big Piney, Farson, and Pinedale
153 AM MDT Fri Aug 21 2026
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Slight chance of showers and thunderstorms
early in the afternoon. Some thunderstorms may
produce gusty winds early in the afternoon.
Chance of precipitation 20 percent.
Chance of thunder...20 percent.
Max temperature.....82-87.
24 hr trend......1 degree warmer.
Min humidity........20-26 percent.
24 hr trend......2 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then west
around 10 mph with higher gusts.
Ridge top winds.....Northwest around 10 mph until 1200, then
southwest.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 7800-9800 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.TONIGHT...
Sky/weather.........Mostly cloudy. Slight chance of thunderstorms
early in the evening. Slight chance of showers
through the night. Slight chance of
thunderstorms late in the evening. Some
thunderstorms may produce gusty winds early in
the evening. Chance of precipitation 20
percent.
Chance of thunder...20 percent.
Min temperature.....54-59.
24 hr trend......4 degrees warmer.
Max humidity........57-63 percent.
24 hr trend......5 percent drier.
Humidity recovery...Good.
20-foot winds.......North winds 10 to 15 mph with gusts to around
25 mph until 0300, then downslope/downvalley
4-7 mph.
Ridge top winds.....North 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North 10 to 15 mph.
Mixing Height.......3000-5000 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.SATURDAY...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...20 percent.
Max temperature.....76-81.
24 hr trend......6 degrees cooler.
Min humidity........33-39 percent.
24 hr trend......11 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then
southwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....North around 10 mph until 1200, then southwest.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast around 10 mph until 1200, then
southwest.
Mixing Height.......1600-3600 ft agl until 1200, then 7000-9000 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Partly cloudy. Slight chance of showers and
thunderstorms in the evening, then slight chance of showers after
midnight. Lows in the lower 50s. Winds generally less than
10 mph.
.SUNDAY...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.
.MONDAY...Partly cloudy. Chance of showers and thunderstorms.
Lows in the upper 40s. Highs in the upper 70s. Winds generally
less than 10 mph.
.TUESDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the mid 40s. Highs in the mid 70s. Winds
generally less than 10 mph.
.WEDNESDAY THROUGH THURSDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the upper 40s. Highs in the
upper 70s.
$$
WYZ277-221000-
Lincoln and Uinta Counties/Lower Elevations-
Including the cities of Evanston, Fort Bridger, and Kemmerer
153 AM MDT Fri Aug 21 2026
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Slight chance of showers and thunderstorms late
in the afternoon. Some thunderstorms may
produce gusty winds late in the afternoon.
Chance of precipitation 20 percent.
Chance of thunder...20 percent.
Max temperature.....84-89.
24 hr trend......2 degrees warmer.
Min humidity........15-21 percent.
24 hr trend......1 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then
southwest around 10 mph 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.....Southwest 10 to 15 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 8400-10400 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.TONIGHT...
Sky/weather.........Mostly cloudy. Slight chance of thunderstorms
early in the evening. Slight chance of showers
through the night. Slight chance of
thunderstorms late in the evening. Some
thunderstorms may produce gusty winds early in
the evening. Chance of precipitation 20
percent.
Chance of thunder...20 percent.
Min temperature.....55-60.
24 hr trend......2 degrees warmer.
Max humidity........63-69 percent.
24 hr trend......9 percent wetter.
Humidity recovery...Good.
20-foot winds.......Southwest winds around 15 mph with gusts to
around 25 mph until 2100, then northeast with
gusts to around 25 mph until 2400, then
downslope/downvalley 4-7 mph.
Ridge top winds.....South around 15 mph until 2400, then north.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph until 2400, then
northeast.
Mixing Height.......2600-4600 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.SATURDAY...
Sky/weather.........Partly cloudy. Chance of showers and slight
chance of thunderstorms in the afternoon.
Chance of precipitation 40 percent.
Chance of thunder...20 percent.
Max temperature.....78-83.
24 hr trend......7 degrees cooler.
Min humidity........27-33 percent.
24 hr trend......12 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then
southwest around 10 mph with higher gusts.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 10 mph until 1200, then
southwest.
Mixing Height.......1600-3600 ft agl until 1200, then 7200-9200 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the lower 50s. Winds generally less than
10 mph.
.SUNDAY THROUGH TUESDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows 48 to 53. Highs 77 to 82. Winds
generally less than 10 mph.
.WEDNESDAY THROUGH THURSDAY...Partly cloudy. Lows in the upper
40s. Highs around 80.
$$
WYZ279-221000-
Sweetwater County/Rock Springs BLM/Flaming Gorge NRA-
Including the cities of Green River, Rock Springs, and Wamsutter
153 AM MDT Fri Aug 21 2026
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Slight chance of showers and thunderstorms late
in the afternoon. Some thunderstorms may
produce gusty winds late in the afternoon.
Chance of precipitation 20 percent.
Chance of thunder...10 percent.
Max temperature.....85-90.
24 hr trend......2 degrees warmer.
Min humidity........23-29 percent.
24 hr trend......Unchanged.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
southwest around 10 mph with gusts to around 25
mph until 1500, then west with gusts to around
25 mph.
Ridge top winds.....Southwest around 10 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 9000-11000 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.TONIGHT...
Sky/weather.........Partly cloudy then becoming mostly cloudy.
Slight chance of thunderstorms early in the
evening. Slight chance of showers in the
evening. Some thunderstorms may produce gusty
winds early in the evening. Chance of
precipitation 20 percent.
Chance of thunder...20 percent.
Min temperature.....58-63.
24 hr trend......3 degrees warmer.
Max humidity........52-58 percent.
24 hr trend......2 percent drier.
Humidity recovery...Moderate.
20-foot winds.......North winds 10 to 15 mph with gusts to around
25 mph until 2400, then northeast with gusts to
around 15 mph until 0300, then
downslope/downvalley 4-7 mph.
Ridge top winds.....North around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North around 15 mph.
Mixing Height.......5000-7000 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Good until 2400, then poor.
.SATURDAY...
Sky/weather.........Partly cloudy. Slight chance of showers in the
afternoon. Slight chance of thunderstorms in
the afternoon. Chance of showers late in the
afternoon. Chance of precipitation 50 percent.
Chance of thunder...20 percent.
Max temperature.....80-85.
24 hr trend......5 degrees cooler.
Min humidity........37-43 percent.
24 hr trend......11 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southwest around 10 mph with higher gusts.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 6600-8600 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Mostly cloudy. Chance of showers and slight
chance of thunderstorms in the evening. Lows in the mid 50s.
Winds generally less than 10 mph.
.SUNDAY THROUGH TUESDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows 51 to 56. Highs 80 to 85.
Southwest winds around 10 mph.
.WEDNESDAY THROUGH THURSDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the lower 50s. Highs 80 to 85.
$$
WYZ289-221000-
Granite/Green/Ferris/Rattlesnake Mountains-
Including the city of Jeffrey City
153 AM MDT Fri Aug 21 2026
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Slight chance of showers and thunderstorms
early in the afternoon. Some thunderstorms may
produce gusty winds early in the afternoon.
Chance of precipitation 20 percent.
Chance of thunder...10 percent.
Max temperature.....86-91.
24 hr trend......2 degrees warmer.
Min humidity........15-21 percent.
24 hr trend......1 percent wetter.
20-foot winds.......West winds around 10 mph with gusts to around
25 mph until 1500, then northwest with gusts to
around 25 mph.
Ridge top winds.....Southwest around 15 mph until 1200, then
northwest.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph.
Mixing Height.......2000-4000 ft agl until 1200, then 10000-12000
ft agl.
Smoke dispersal.....Poor to fair until 1200, then very good to
excellent.
.TONIGHT...
Sky/weather.........Partly cloudy then becoming mostly cloudy.
Slight chance of thunderstorms early in the
evening. Slight chance of showers in the
evening. Patchy smoke in the late evening and
overnight. Some thunderstorms may produce gusty
winds early in the evening. Chance of
precipitation 20 percent.
Chance of thunder...20 percent.
Min temperature.....59-64.
24 hr trend......2 degrees warmer.
Max humidity........47-53 percent.
24 hr trend......1 percent drier.
Humidity recovery...Moderate.
20-foot winds.......North winds 10 to 15 mph until 2400, then
northeast. Gusts up to 25 mph.
Ridge top winds.....Northeast around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast around 15 mph.
Mixing Height.......4400-6400 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.SATURDAY...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
Slight chance of showers late in the afternoon.
Slight chance of thunderstorms late in the
afternoon. Chance of showers late in the
afternoon. Chance of precipitation 40 percent.
Chance of thunder...20 percent.
Max temperature.....82-87.
24 hr trend......4 degrees cooler.
Min humidity........25-31 percent.
24 hr trend......8 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then west
around 10 mph with gusts to around 25 mph.
Ridge top winds.....Northeast around 10 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....East around 10 mph until 1200, then southwest.
Mixing Height.......800-2800 ft agl until 1200, then 6200-8200 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Mostly cloudy. Chance of showers and slight
chance of thunderstorms in the evening. Lows in the upper 50s.
Southwest winds around 10 mph.
.SUNDAY THROUGH TUESDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows 53 to 58. Highs 80 to 85.
Northwest winds around 10 mph.
.WEDNESDAY THROUGH THURSDAY...Partly cloudy. Lows in the mid 50s.
Highs in the lower 80s.
$$
WYZ300-221000-
Casper Mountain-
153 AM MDT Fri Aug 21 2026
.TODAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Patchy smoke late in the afternoon.
Chance of thunder...0 percent.
Max temperature.....85-90.
24 hr trend......3 degrees warmer.
Min humidity........18-24 percent.
24 hr trend......1 percent wetter.
20-foot winds.......Southwest winds around 10 mph and gusty until
1200, then northwest with gusts to around 25
mph.
Ridge top winds.....Southwest around 15 mph until 1200, then
northwest.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph until 1200, then
northwest.
Mixing Height.......2200-4200 ft agl until 1200, then 9600-11600 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then excellent.
.TONIGHT...
Sky/weather.........Partly cloudy. Patchy smoke.
Chance of thunder...0 percent.
Min temperature.....59-64.
24 hr trend......1 degree warmer.
Max humidity........49-55 percent.
24 hr trend......9 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......Northeast winds around 10 mph until 2400, then
east until 0300, then downslope/downvalley 4-7
mph. Gusts up to 25 mph.
Ridge top winds.....Northeast around 15 mph until 2400, then east.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast around 15 mph until 2400, then east.
Mixing Height.......4400-6400 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Good until 2400, then poor.
.SATURDAY...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
Slight chance of showers and thunderstorms in
the afternoon. Chance of showers and
thunderstorms late in the afternoon. Chance of
precipitation 30 percent.
Chance of thunder...30 percent.
Max temperature.....80-85.
24 hr trend......5 degrees cooler.
Min humidity........34-40 percent.
24 hr trend......15 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then east
around 10 mph with higher gusts.
Ridge top winds.....Southeast around 10 mph until 1200, then
northeast.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 10 mph until 1200, then
southwest.
Mixing Height.......1400-3400 ft agl until 1200, then 6200-8200 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.SATURDAY NIGHT...Mostly cloudy. Chance of showers and slight
chance of thunderstorms in the evening. Lows around 60. South
winds around 10 mph.
.SUNDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the upper 50s. Highs in the lower 80s.
West winds around 10 mph.
.MONDAY THROUGH TUESDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows 52 to 57. Highs 75 to 80. Winds
generally less than 10 mph.
.WEDNESDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the upper 70s.
.THURSDAY...Partly cloudy. Highs in the upper 70s.
$$