Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
561
FNUS55 KRIW 081115
FWFRIW
Fire Weather Planning Forecast for Western and Central Wyoming
National Weather Service Riverton WY
515 AM MDT Tue Sep 8 2026
.DISCUSSION...
...Yellowstone NP and Teton dispatch areas (includes fire weather
zones 140...414...415...and 416)...
Conditions will remain dry with clear skies through the day today
and tonight. Wind gusts of 25 to 35 mph will become widespread
across the dispatch area between 1100 and 1500, quickly decreasing
after 1900. Skies will become partly cloudy over zone 140 late
this afternoon into the evening as a cold front moves over
northern WY. Winds will turn more northwesterly in this zone
behind the front. RH recovery will be fair tonight in zones 414
and 416.
...Cody dispatch area (includes fire weather zones 275...276...
282...283...285...286...287...288...and 289)...
***RED FLAG WARNING IN EFFECT FOR ZONES 276, 283, 285 AND 287 FROM
NOON TODAY TO 7 PM MDT THIS EVENING***
Conditions will remain dry with clear skies through the day today
and tonight. Wind gusts of 25 to 35 mph will occur in zones
286/288 between 1100 and 1300, with similar winds occurring in
zones 285, 287 and 289 between 1300 and 1500. Winds gusts up to
25 mph will occur in zones 276 and 283 after 1500. A cold front
will reach northern WY around 1800, quickly moving southward over
the dispatch area through the evening toward midnight. Winds will
turn more northerly in its wake, with gusts around 25 mph. Winds
will gradually become light after midnight. RH recovery will be
fair to poor tonight for most zones.
...Casper dispatch area (includes fire weather zones 277...278...
279...280...281...285...289...and 300)...
***RED FLAG WARNING IN EFFECT FOR ZONES 280, 289 AND 300 FROM
NOON TODAY TO 9 PM MDT THURSDAY***
Conditions will remain dry with clear skies through the day today
and tonight. Wind gusts of 25 to 35 mph will occur in zones 280,
289 and 300 by 1200, spreading to zones 277/278/279 through 1500.
A cold front will reach northern WY around 1800, quickly moving
southward over the dispatch area through the evening toward
midnight. Winds will turn more northerly in its wake, with gusts
around 25 mph. Winds will gradually become light after midnight.
RH recovery will be fair to poor tonight in zones 277, 279, 289
and 300.
...Thunderstorms imply strong gusty and erratic winds...
WYZ280-091315-
Natrona County/Casper BLM-
Including the cities of Casper and Midwest
515 AM MDT Tue Sep 8 2026
...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT
THURSDAY...
.TODAY...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....75-80.
24 hr trend......2 degrees cooler.
Min humidity........9-15 percent.
24 hr trend......4 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
15 to 20 mph with gusts to around 30 mph.
Ridge top winds.....West around 10 mph until 1200, then around 20
mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph until 1200, then around 25
mph.
Mixing Height.......1200-3200 ft agl until 1200, then 6600-8600 ft
agl.
Smoke dispersal.....Poor until 1200, then very good to excellent.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....44-49.
24 hr trend......4 degrees cooler.
Max humidity........59-65 percent.
24 hr trend......20 percent wetter.
Humidity recovery...Good.
20-foot winds.......Northwest winds 10 to 15 mph until 2400.
Downslope/downvalley 4-7 mph after 0300. Gusts
up to 30 mph.
Ridge top winds.....Northwest around 20 mph until 2400, then around
10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 20 mph until 2400, then north
around 10 mph.
Mixing Height.......4200-6200 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Very good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....74-79.
24 hr trend......1 degree cooler.
Min humidity........7-13 percent.
24 hr trend......2 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
southwest 10 to 15 mph with gusts to around 30
mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then west
around 20 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 6000-8000 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Clear. Lows in the upper 40s. Winds generally
less than 10 mph.
.THURSDAY...Mostly clear. Lows in the mid 50s. Highs in the lower
80s. Southwest winds around 15 mph.
.FRIDAY...Mostly clear. Lows in the lower 40s. Highs in the upper
70s. North winds around 20 mph.
.SATURDAY...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows in the mid 40s. Highs in the mid
70s. Southeast winds around 15 mph.
.SUNDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows around 40. Highs in the upper 60s.
.MONDAY...Mostly sunny. Slight chance of showers in the morning.
Highs in the upper 60s.
$$
WYZ283-091315-
Upper Wind River Basin/Wind River Basin-
Including the cities of Crowheart, Lander, Riverton, and Shoshoni
515 AM MDT Tue Sep 8 2026
...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 7 PM MDT THIS
EVENING...
.TODAY...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....73-78.
24 hr trend......Unchanged.
Min humidity........14-20 percent.
24 hr trend......Unchanged.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
10 to 15 mph with gusts to around 30 mph.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph until 1200, then around 20
mph.
Mixing Height.......1000-3000 ft agl until 1200, then 6200-8200 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.TONIGHT...
Sky/weather.........Clear.
Chance of thunder...0 percent.
Min temperature.....41-46.
24 hr trend......1 degree cooler.
Max humidity........49-55 percent.
24 hr trend......13 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......Northwest winds around 20 mph until 2100, then
around 10 mph until 2400, then
downslope/downvalley 4-7 mph. Gusts up to 30
mph.
Ridge top winds.....Northwest around 20 mph until 2400, then west
around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 20 mph until 2400, then around
10 mph.
Mixing Height.......4000-6000 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Good to very good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....73-78.
24 hr trend......Unchanged.
Min humidity........12-18 percent.
24 hr trend......3 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then west
around 10 mph with gusts to around 25 mph.
Ridge top winds.....Southwest around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......800-2800 ft agl until 1200, then 5200-7200 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Clear. Lows in the upper 40s. West winds
around 10 mph.
.THURSDAY...Mostly clear. Lows in the mid 50s. Highs in the lower
80s. West winds around 10 mph.
.FRIDAY...Mostly clear. Lows in the mid 40s. Highs in the upper
70s. Northwest winds around 15 mph.
.SATURDAY...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows in the mid 40s. Highs in the mid
70s. Northeast winds around 10 mph.
.SUNDAY...Partly cloudy with slight chance of showers. Lows in
the upper 30s. Highs in the mid 60s.
.MONDAY...Mostly sunny. Slight chance of showers in the
afternoon. Highs in the mid 60s.
$$
WYZ285-091315-
South Bighorn Mountains-
515 AM MDT Tue Sep 8 2026
...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 7 PM MDT THIS
EVENING...
.TODAY...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....67-72.
24 hr trend......2 degrees cooler.
Min humidity........11-17 percent.
24 hr trend......2 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then west
10 to 15 mph with gusts to around 30 mph.
Ridge top winds.....Southwest 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 15 to 20 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 5800-7800 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....42-47.
24 hr trend......3 degrees cooler.
Max humidity........49-55 percent.
24 hr trend......17 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......Northwest winds 10 to 15 mph until 0300, then
downslope/downvalley 4-7 mph. Gusts up to 35
mph.
Ridge top winds.....Northwest around 20 mph until 2400, then west
around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 20 mph until 2400, then around
10 mph.
Mixing Height.......3800-5800 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Good to very good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....66-71.
24 hr trend......1 degree cooler.
Min humidity........13-19 percent.
24 hr trend......Unchanged.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
southwest 10 to 15 mph until 1500, then
northwest. Gusts up to 25 mph.
Ridge top winds.....West around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 15 to 20 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 5200-7200 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good to very
good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Clear. Lows in the upper 40s. Winds generally
less than 10 mph.
.THURSDAY...Mostly clear. Lows in the mid 50s. Highs in the mid
70s. West winds around 15 mph.
.FRIDAY...Mostly clear. Lows in the lower 40s. Highs around 70.
North winds around 15 mph.
.SATURDAY...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows in the mid 40s. Highs in the mid
60s. Southeast winds around 10 mph.
.SUNDAY...Partly cloudy with chance of showers and snow showers.
Lows in the upper 30s. Highs in the upper 50s.
.MONDAY...Mostly sunny. Highs in the upper 50s.
$$
WYZ281-091315-
Johnson County/Casper BLM-
Including the cities of Buffalo and Kaycee
515 AM MDT Tue Sep 8 2026
.TODAY...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....71-76.
24 hr trend......6 degrees cooler.
Min humidity........15-21 percent.
24 hr trend......Unchanged.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southwest around 10 mph with gusts to around 25
mph until 1500, then northwest with gusts to
around 25 mph.
Ridge top winds.....North around 10 mph until 1200, then northwest.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 10 mph until 1200, then
southwest.
Mixing Height.......1000-3000 ft agl until 1200, then 5800-7800 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....44-49.
24 hr trend......3 degrees cooler.
Max humidity........62-68 percent.
24 hr trend......14 percent wetter.
Humidity recovery...Good.
20-foot winds.......North winds 10 to 15 mph until 0300, then
downslope/downvalley 4-7 mph. Gusts up to 30
mph.
Ridge top winds.....North around 20 mph until 2400, then northwest
around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North around 20 mph until 2400, then northwest
around 10 mph.
Mixing Height.......3200-5200 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....70-75.
24 hr trend......Unchanged.
Min humidity........15-21 percent.
24 hr trend......1 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then south
around 10 mph until 1500, then northwest. Gusts
up to 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 west
around 20 mph.
Mixing Height.......1400-3400 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...Clear. Lows in the upper 40s. Winds generally
less than 10 mph.
.THURSDAY...Warmer. Mostly clear. Lows in the mid 50s. Highs in
the mid 80s. Southwest winds around 10 mph.
.FRIDAY...Not as warm. Mostly clear. Lows in the lower 40s. Highs
in the mid 70s. North winds around 15 mph.
.SATURDAY...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows in the mid 40s. Highs in the lower
70s. East winds around 10 mph.
.SUNDAY...Partly cloudy with chance of showers. Lows around 40.
Highs in the mid 60s.
.MONDAY...Partly cloudy. Highs in the mid 60s.
$$
WYZ282-091315-
South Bighorn Basin/Worland BLM-
Including the cities of Ten Sleep, Thermopolis, and Worland
515 AM MDT Tue Sep 8 2026
.TODAY...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....70-75.
24 hr trend......3 degrees cooler.
Min humidity........12-18 percent.
24 hr trend......2 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then
northwest around 10 mph with gusts to around 25
mph.
Ridge top winds.....North around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 5800-7800 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....41-46.
24 hr trend......2 degrees cooler.
Max humidity........52-58 percent.
24 hr trend......15 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......Northwest winds 10 to 15 mph until 0300, then
downslope/downvalley 4-7 mph. Gusts up to 25
mph.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 20 mph until 2400, then west
around 10 mph.
Mixing Height.......3400-5400 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....70-75.
24 hr trend......Unchanged.
Min humidity........11-17 percent.
24 hr trend......1 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then
northeast around 10 mph with higher gusts.
Ridge top winds.....South around 10 mph until 1200, then east.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1200, then west.
Mixing Height.......1000-3000 ft agl until 1200, then 4600-6600 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Clear. Lows in the upper 40s. Winds generally
less than 10 mph.
.THURSDAY...Warmer. Mostly clear. Lows in the mid 50s. Highs in
the mid 80s. Southwest winds around 10 mph.
.FRIDAY...Mostly clear. Lows in the mid 40s. Highs in the upper
70s. Northwest winds around 15 mph.
.SATURDAY...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows in the mid 40s. Highs in the lower
70s. North winds around 10 mph.
.SUNDAY...Partly cloudy with chance of showers. Lows around 40.
Highs in the mid 60s.
.MONDAY...Mostly sunny. Slight chance of showers in the morning.
Highs in the mid 60s.
$$
WYZ275-091315-
North Bighorn Basin/Worland BLM-
Including the cities of Greybull, Lovell, and Powell
515 AM MDT Tue Sep 8 2026
.TODAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....65-70.
24 hr trend......4 degrees cooler.
Min humidity........14-20 percent.
24 hr trend......2 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then
northwest around 10 mph with gusts to around 25
mph.
Ridge top winds.....Southwest around 10 mph until 1200, then south.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 5800-7800 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....41-46.
24 hr trend......1 degree cooler.
Max humidity........56-62 percent.
24 hr trend......12 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......Northwest winds 10 to 15 mph with gusts to
around 30 mph until 0300, then
downslope/downvalley 4-7 mph.
Ridge top winds.....North around 20 mph until 2400, then northwest
around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North around 20 mph until 2400, then northwest
around 10 mph.
Mixing Height.......2800-4800 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....66-71.
24 hr trend......Unchanged.
Min humidity........13-19 percent.
24 hr trend......1 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 around 10 mph until 1200, then west.
Mixing Height.......1000-3000 ft agl until 1200, then 5000-7000 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Clear. Lows in the upper 40s. Winds generally
less than 10 mph.
.THURSDAY...Warmer. Mostly clear. Lows in the mid 50s. Highs in
the lower 80s. South winds around 10 mph.
.FRIDAY...Mostly clear. Lows in the mid 40s. Highs in the mid
70s. Northwest winds around 15 mph.
.SATURDAY...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows in the lower 40s. Highs around 70.
Northwest winds around 10 mph.
.SUNDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the upper 30s. Highs in the lower 60s.
.MONDAY...Mostly sunny. Slight chance of showers in the morning.
Highs in the mid 60s.
$$
WYZ276-091315-
Cody Foothills-
Including the cities of Clark, Cody, and Meeteetse
515 AM MDT Tue Sep 8 2026
...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 7 PM MDT THIS
EVENING...
.TODAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....68-73.
24 hr trend......Unchanged.
Min humidity........17-23 percent.
24 hr trend......3 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southwest around 10 mph with gusts to around 30
mph until 1500, then west around 20 mph with
gusts to around 30 mph.
Ridge top winds.....Southwest around 10 mph until 1200, then west
around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then west
around 20 mph.
Mixing Height.......1600-3600 ft agl until 1200, then 7200-9200 ft
agl.
Smoke dispersal.....Poor until 1200, then very good to excellent.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....43-48.
24 hr trend......1 degree cooler.
Max humidity........49-55 percent.
24 hr trend......10 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......Northwest winds around 15 mph with gusts to
around 30 mph until 2100, then
downslope/downvalley 4-7 mph.
Ridge top winds.....Northwest around 15 mph until 2400, then
southwest.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph until 2400, then west.
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.
Chance of thunder...0 percent.
Max temperature.....72-77.
24 hr trend......3 degrees warmer.
Min humidity........14-20 percent.
24 hr trend......2 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southeast around 10 mph until 1500, then
northwest. Gusts up to 25 mph.
Ridge top winds.....Southwest around 10 mph until 1200, then
southeast.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then west
around 20 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 6200-8200 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Clear. Lows around 50. West winds around
15 mph.
.THURSDAY...Mostly clear. Lows in the mid 50s. Highs in the lower
80s. West winds around 15 mph.
.FRIDAY...Not as warm. Mostly clear. Lows in the mid 40s. Highs
in the lower 70s. Northwest winds around 15 mph.
.SATURDAY...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows in the lower 40s. Highs in the mid
60s. North winds around 10 mph.
.SUNDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the upper 30s. Highs in the upper 50s.
.MONDAY...Mostly sunny. Slight chance of showers in the morning.
Highs in the lower 60s.
$$
WYZ287-091315-
Owl Creek Mountains-
515 AM MDT Tue Sep 8 2026
...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 7 PM MDT THIS
EVENING...
.TODAY...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....67-72.
24 hr trend......1 degree warmer.
Min humidity........12-18 percent.
24 hr trend......1 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900. Winds west
around 20 mph after 1500. Gusts up to 30 mph.
Ridge top winds.....Southwest around 10 mph until 1200, then around
20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then west
around 20 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 6800-8800 ft
agl.
Smoke dispersal.....Poor until 1200, then very good to excellent.
.TONIGHT...
Sky/weather.........Clear.
Chance of thunder...0 percent.
Min temperature.....42-47.
24 hr trend......2 degrees cooler.
Max humidity........42-48 percent.
24 hr trend......14 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......Northwest winds 10 to 15 mph until 0300, then
downslope/downvalley 4-7 mph. Gusts up to 30
mph.
Ridge top winds.....Northwest around 20 mph until 2400, then west
around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 20 mph until 2400, then around
10 mph.
Mixing Height.......3800-5800 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Good to very good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....68-73.
24 hr trend......1 degree warmer.
Min humidity........11-17 percent.
24 hr trend......2 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
southeast 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.....Southwest 10 to 15 mph.
Mixing Height.......800-2800 ft agl until 1200, then 5600-7600 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Clear. Lows in the upper 40s. West winds
around 10 mph.
.THURSDAY...Mostly clear. Lows in the mid 50s. Highs in the upper
70s. West winds around 15 mph.
.FRIDAY...Mostly clear. Lows in the mid 40s. Highs in the lower
70s. Northwest winds around 15 mph.
.SATURDAY...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows in the mid 40s. Highs in the mid
60s. Northeast winds around 10 mph.
.SUNDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the upper 30s. Highs in the upper 50s.
.MONDAY...Mostly sunny. Slight chance of showers in the morning.
Highs around 60.
$$
WYZ286-091315-
Absaroka Mountains/North Shoshone NF-
Including the city of Pahaska
515 AM MDT Tue Sep 8 2026
.TODAY...
Sky/weather.........Mostly sunny. Slight chance of showers late in
the afternoon. Chance of showers 20 percent.
Chance of thunder...0 percent.
Max temperature.....59-64.
24 hr trend......2 degrees warmer.
Min humidity........20-26 percent.
24 hr trend......2 percent drier.
20-foot winds.......West winds 10 to 15 mph until 1200, then around
20 mph. Gusts up to 35 mph.
Ridge top winds.....West around 15 mph until 1200, then around 25
mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph until 1200, then around 30
mph.
Mixing Height.......1800-3800 ft agl until 1200, then 6200-8200 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then excellent.
.TONIGHT...
Sky/weather.........Mostly clear. Chance of showers early in the
evening. Chance of showers 40 percent.
Chance of thunder...0 percent.
Min temperature.....37-42.
24 hr trend......1 degree cooler.
Max humidity........60-66 percent.
24 hr trend......5 percent wetter.
Humidity recovery...Good.
20-foot winds.......West winds 10 to 15 mph with gusts to around 35
mph until 2400, then downslope/downvalley 4-7
mph.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 20 mph until 2400, then around 10
mph.
Mixing Height.......2800-4800 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....63-68.
24 hr trend......3 degrees warmer.
Min humidity........16-22 percent.
24 hr trend......5 percent drier.
20-foot winds.......West winds 10 to 15 mph until 1500, then around
20 mph. Gusts up to 35 mph.
Ridge top winds.....West 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph until 1200, then around 25
mph.
Mixing Height.......1400-3400 ft agl until 1200, then 5400-7400 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Clear. Lows in the lower 40s. West winds
around 15 mph.
.THURSDAY...Mostly clear. Lows in the mid 40s. Highs in the upper
60s. West winds around 20 mph.
.FRIDAY...Mostly clear. Slight chance of showers. Lows in the
upper 30s. Highs in the lower 60s. West winds around 15 mph.
.SATURDAY...Partly cloudy with chance of showers, snow showers
and slight chance of thunderstorms. Lows in the upper 30s. Highs
in the upper 50s. Southwest winds around 10 mph.
.SUNDAY...Partly cloudy with chance of showers, snow showers and
slight chance of thunderstorms. Lows in the lower 30s. Highs
around 50.
.MONDAY...Partly cloudy. Slight chance of showers and snow
showers in the morning. Highs in the lower 50s.
$$
WYZ140-091315-
Yellowstone National Park-
Including the cities of Lake, Mammoth, and Old Faithful
515 AM MDT Tue Sep 8 2026
.TODAY...
Sky/weather.........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.....57-62.
24 hr trend......3 degrees warmer.
Min humidity........26-32 percent.
24 hr trend......11 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
southwest 10 to 15 mph. Gusts up to 30 mph.
Ridge top winds.....Southwest 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph until 1200, then west
around 30 mph.
Mixing Height.......1600-3600 ft agl until 1200, then 5800-7800 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then excellent.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....32-37.
24 hr trend......Unchanged.
Max humidity........71-77 percent.
24 hr trend......Unchanged.
Humidity recovery...Excellent.
20-foot winds.......West winds around 15 mph with gusts to around
30 mph until 2100, then downslope/downvalley
4-7 mph.
Ridge top winds.....West around 15 mph until 2400, then south.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph until 2400, then southwest.
Mixing Height.......2800-4800 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....63-68.
24 hr trend......5 degrees warmer.
Min humidity........22-28 percent.
24 hr trend......5 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southwest around 10 mph with gusts to around 30
mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then west
around 20 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 4600-6600 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good to very
good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Clear. Lows in the mid 30s. Winds generally
less than 10 mph.
.THURSDAY THROUGH FRIDAY...Mostly clear. Lows 36 to 41. Highs
60 to 65. Southwest winds around 10 mph.
.SATURDAY...Partly cloudy with chance of showers, snow showers
and slight chance of thunderstorms. Lows in the mid 30s. Highs in
the upper 50s. South winds around 10 mph.
.SUNDAY...Cooler. Partly cloudy with chance of showers, snow
showers and slight chance of thunderstorms. Lows around 30. Highs
in the upper 40s.
.MONDAY...Partly cloudy. Highs in the lower 50s.
$$
WYZ415-091315-
North Zone Bridger Teton NF and Grand Teton NP-
Including the cities of Jackson and Moran
515 AM MDT Tue Sep 8 2026
.TODAY...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....59-64.
24 hr trend......4 degrees warmer.
Min humidity........24-30 percent.
24 hr trend......5 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
southwest 10 to 15 mph. Gusts up to 30 mph.
Ridge top winds.....Southwest around 10 mph until 1200, then west
around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then west
around 25 mph.
Mixing Height.......1600-3600 ft agl until 1200, then 5600-7600 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good to
excellent.
.TONIGHT...
Sky/weather.........Clear.
Chance of thunder...0 percent.
Min temperature.....32-37.
24 hr trend......Unchanged.
Max humidity........68-74 percent.
24 hr trend......Unchanged.
Humidity recovery...Good.
20-foot winds.......West winds around 10 mph with gusts to around
30 mph until 2100, then downslope/downvalley
4-7 mph.
Ridge top winds.....West around 15 mph until 2400, then south.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph until 2400, then southwest.
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.
Chance of thunder...0 percent.
Max temperature.....62-67.
24 hr trend......3 degrees warmer.
Min humidity........22-28 percent.
24 hr trend......7 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
around 10 mph. Gusts up to 25 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
around 20 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 4400-6400 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Clear. Lows in the mid 30s. Winds generally
less than 10 mph.
.THURSDAY THROUGH FRIDAY...Mostly clear. Lows 38 to 43. Highs
62 to 67. Southwest winds around 10 mph.
.SATURDAY...Partly cloudy with chance of showers, snow showers
and slight chance of thunderstorms. Lows in the mid 30s. Highs in
the lower 60s. South winds around 10 mph.
.SUNDAY...Cooler. Partly cloudy with chance of showers, snow
showers and slight chance of thunderstorms. Lows in the lower
30s. Highs in the lower 50s.
.MONDAY...Mostly sunny. Highs in the mid 50s.
$$
WYZ416-091315-
West Wind River Mountains/East Zone Bridger Teton NF-
515 AM MDT Tue Sep 8 2026
.TODAY...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....59-64.
24 hr trend......4 degrees warmer.
Min humidity........21-27 percent.
24 hr trend......5 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900. Winds west
around 20 mph after 1500. Gusts up to 35 mph.
Ridge top winds.....West around 15 mph until 1200, then around 25
mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph until 1200, then around 25
mph.
Mixing Height.......1400-3400 ft agl until 1200, then 5400-7400 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good to
excellent.
.TONIGHT...
Sky/weather.........Clear.
Chance of thunder...0 percent.
Min temperature.....32-37.
24 hr trend......Unchanged.
Max humidity........52-58 percent.
24 hr trend......2 percent drier.
Humidity recovery...Moderate.
20-foot winds.......West winds around 15 mph with gusts to around
30 mph until 2100, then downslope/downvalley
4-7 mph.
Ridge top winds.....Northwest around 15 mph until 2400, then
northeast.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 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.
Chance of thunder...0 percent.
Max temperature.....60-65.
24 hr trend......2 degrees warmer.
Min humidity........16-22 percent.
24 hr trend......8 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
around 15 mph with gusts to around 30 mph.
Ridge top winds.....West around 10 mph until 1200, then around 20
mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 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.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Clear. Lows in the mid 30s. Winds generally
less than 10 mph.
.THURSDAY...Mostly clear. Lows in the lower 40s. Highs in the mid
60s. West winds around 10 mph.
.FRIDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the upper 30s. Highs around 60. West winds
around 15 mph.
.SATURDAY...Partly cloudy with chance of showers, snow showers
and slight chance of thunderstorms. Lows in the mid 30s. Highs in
the upper 50s. Southwest winds around 15 mph.
.SUNDAY...Cooler. Partly cloudy with chance of showers, snow
showers and slight chance of thunderstorms. Lows around 30. Highs
in the upper 40s.
.MONDAY...Mostly sunny. Slight chance of showers and snow showers
in the afternoon. Highs in the lower 50s.
$$
WYZ288-091315-
East Wind River Mountains/South Shoshone NF-
Including the cities of Dubois and South Pass
515 AM MDT Tue Sep 8 2026
.TODAY...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....63-68.
24 hr trend......3 degrees warmer.
Min humidity........18-24 percent.
24 hr trend......4 percent drier.
20-foot winds.......West winds 10 to 15 mph until 1200, then around
20 mph. Gusts up to 40 mph.
Ridge top winds.....West around 15 mph until 1200, then around 25
mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 20 mph until 1200, then around 30
mph.
Mixing Height.......1600-3600 ft agl until 1200, then 5800-7800 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then excellent.
.TONIGHT...
Sky/weather.........Clear.
Chance of thunder...0 percent.
Min temperature.....36-41.
24 hr trend......1 degree cooler.
Max humidity........47-53 percent.
24 hr trend......5 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......West winds around 20 mph with gusts to around
35 mph until 2100. Downslope/downvalley 4-7 mph
after 2400.
Ridge top winds.....West around 20 mph until 2400, then around 10
mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 20 mph until 2400, then around 10
mph.
Mixing Height.......2800-4800 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....64-69.
24 hr trend......2 degrees warmer.
Min humidity........15-21 percent.
24 hr trend......6 percent drier.
20-foot winds.......West winds 10 to 15 mph with gusts to around 35
mph until 1500, then around 20 mph with gusts
to around 35 mph.
Ridge top winds.....West 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph until 1200, then around 25
mph.
Mixing Height.......1200-3200 ft agl until 1200, then 5000-7000 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Clear. Lows in the lower 40s. West winds
around 15 mph.
.THURSDAY...Mostly clear. Lows in the upper 40s. Highs in the
upper 60s. West winds around 20 mph.
.FRIDAY...Mostly clear. Lows in the lower 40s. Highs in the mid
60s. West winds around 15 mph.
.SATURDAY...Partly cloudy with chance of showers, snow showers
and slight chance of thunderstorms. Lows around 40. Highs in the
lower 60s. Southwest winds around 10 mph.
.SUNDAY...Partly cloudy with chance of showers, snow showers and
slight chance of thunderstorms. Lows in the mid 30s. Highs in the
mid 50s.
.MONDAY...Mostly sunny. Highs in the mid 50s.
$$
WYZ414-091315-
Salt and Wyoming Ranges/West Zone Bridger Teton NF-
Including the city of Afton
515 AM MDT Tue Sep 8 2026
.TODAY...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....60-65.
24 hr trend......6 degrees warmer.
Min humidity........22-28 percent.
24 hr trend......7 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
15 to 20 mph. Gusts up to 30 mph.
Ridge top winds.....Southwest around 10 mph until 1200, then west
around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then west
around 25 mph.
Mixing Height.......1600-3600 ft agl until 1200, then 5800-7600 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.TONIGHT...
Sky/weather.........Clear.
Chance of thunder...0 percent.
Min temperature.....33-38.
24 hr trend......1 degree warmer.
Max humidity........63-69 percent.
24 hr trend......6 percent drier.
Humidity recovery...Good.
20-foot winds.......West winds around 15 mph with gusts to around
30 mph until 2100, then downslope/downvalley
4-7 mph.
Ridge top winds.....Northwest around 15 mph until 2400, then
southwest.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......2200-4200 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....63-68.
24 hr trend......2 degrees warmer.
Min humidity........14-20 percent.
24 hr trend......9 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
10 to 15 mph with gusts to around 30 mph.
Ridge top winds.....Southwest around 10 mph until 1200, then west
around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then west
around 20 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 4800-6600 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Clear. Lows in the upper 30s. Winds generally
less than 10 mph.
.THURSDAY THROUGH FRIDAY...Mostly clear. Lows 41 to 46. Highs
65 to 70. Southwest winds around 10 mph.
.SATURDAY...Partly cloudy with chance of showers, snow showers
and slight chance of thunderstorms. Lows in the upper 30s. Highs
in the mid 60s. Southwest winds around 15 mph.
.SUNDAY...Cooler. Mostly clear. Chance of showers, snow showers
and slight chance of thunderstorms. Lows in the lower 30s. Highs
in the mid 50s.
.MONDAY...Mostly sunny. Highs in the upper 50s.
$$
WYZ278-091315-
Upper Green River Basin/Rock Springs BLM-
Including the cities of Big Piney, Farson, and Pinedale
515 AM MDT Tue Sep 8 2026
.TODAY...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....66-71.
24 hr trend......4 degrees warmer.
Min humidity........19-25 percent.
24 hr trend......3 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200. Winds west
around 20 mph with gusts to around 30 mph after
1500.
Ridge top winds.....West around 10 mph until 1200, then around 20
mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph until 1200, then around 25
mph.
Mixing Height.......1000-3000 ft agl until 1200, then 5800-7800 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.TONIGHT...
Sky/weather.........Clear.
Chance of thunder...0 percent.
Min temperature.....34-39.
24 hr trend......1 degree cooler.
Max humidity........54-60 percent.
24 hr trend......4 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Northwest winds 10 to 15 mph with gusts to
around 30 mph until 2400, then
downslope/downvalley 4-7 mph.
Ridge top winds.....Northwest around 20 mph until 2400, then north
around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 20 mph until 2400, then north
around 10 mph.
Mixing Height.......3200-5200 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....67-72.
24 hr trend......1 degree warmer.
Min humidity........11-17 percent.
24 hr trend......7 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
10 to 15 mph with gusts to around 30 mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 10 mph until 1200, then west
around 20 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 5400-7400 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Clear. Lows in the upper 30s. Northwest winds
around 10 mph.
.THURSDAY THROUGH FRIDAY...Mostly clear. Lows 40 to 45. Highs
71 to 76. West winds around 10 mph.
.SATURDAY...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows in the upper 30s. Highs in the
lower 70s. Southwest winds around 15 mph.
.SUNDAY...Cooler. Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 30s. Highs around 60.
.MONDAY...Mostly sunny. Highs in the lower 60s.
$$
WYZ277-091315-
Lincoln and Uinta Counties/Lower Elevations-
Including the cities of Evanston, Fort Bridger, and Kemmerer
515 AM MDT Tue Sep 8 2026
.TODAY...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....68-73.
24 hr trend......5 degrees warmer.
Min humidity........17-23 percent.
24 hr trend......4 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
15 to 20 mph with gusts to around 30 mph.
Ridge top winds.....Southeast around 10 mph until 1200, then west
around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 10 mph until 1200, then west
around 25 mph.
Mixing Height.......800-2800 ft agl until 1200, then 5800-7800 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.TONIGHT...
Sky/weather.........Clear.
Chance of thunder...0 percent.
Min temperature.....36-41.
24 hr trend......Unchanged.
Max humidity........55-61 percent.
24 hr trend......6 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Northwest winds around 15 mph with gusts to
around 30 mph until 2100, then
downslope/downvalley 4-7 mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......2600-4600 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....69-74.
24 hr trend......1 degree warmer.
Min humidity........11-17 percent.
24 hr trend......7 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
10 to 15 mph with gusts to around 30 mph.
Ridge top winds.....West around 5 mph until 1200, then around 20
mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph until 1200, then around 20
mph.
Mixing Height.......1200-3200 ft agl until 1200, then 5600-7600 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Clear. Lows around 40. Winds generally less
than 10 mph.
.THURSDAY THROUGH FRIDAY...Mostly clear. Lows 42 to 47. Highs
72 to 77. West winds around 10 mph.
.SATURDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the lower 40s. Highs in the lower 70s.
West winds around 15 mph.
.SUNDAY...Cooler. Mostly clear. Slight chance of showers. Lows in
the mid 30s. Highs in the lower 60s.
.MONDAY...Mostly sunny. Highs in the mid 60s.
$$
WYZ279-091315-
Sweetwater County/Rock Springs BLM/Flaming Gorge NRA-
Including the cities of Green River, Rock Springs, and Wamsutter
515 AM MDT Tue Sep 8 2026
.TODAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....70-75.
24 hr trend......3 degrees warmer.
Min humidity........22-28 percent.
24 hr trend......5 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
10 to 15 mph with gusts to around 30 mph.
Ridge top winds.....South around 10 mph until 1200, then west
around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then west
around 20 mph.
Mixing Height.......800-2800 ft agl until 1200, then 6000-8000 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....42-47.
24 hr trend......1 degree cooler.
Max humidity........51-57 percent.
24 hr trend......2 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Northwest winds 10 to 15 mph with gusts to
around 30 mph until 2400, then
downslope/downvalley 4-7 mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 20 mph until 2400, then north
around 10 mph.
Mixing Height.......3600-5600 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Good to very good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....70-75.
24 hr trend......1 degree cooler.
Min humidity........15-21 percent.
24 hr trend......7 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
around 15 mph with gusts to around 30 mph.
Ridge top winds.....West around 10 mph until 1200, then around 20
mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph until 1200, then around 20
mph.
Mixing Height.......1000-3000 ft agl until 1200, then 5800-7800 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Mostly clear. Lows in the mid 40s. West winds
around 10 mph.
.THURSDAY...Partly cloudy. Lows in the lower 50s. Highs in the
upper 70s. West winds around 10 mph.
.FRIDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the mid 70s. West
winds around 10 mph.
.SATURDAY...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows in the mid 40s. Highs in the mid
70s. Southwest winds around 15 mph.
.SUNDAY...Cooler. Mostly clear. Slight chance of showers and
thunderstorms. Lows in the upper 30s. Highs in the mid 60s.
.MONDAY...Mostly sunny. Highs in the mid 60s.
$$
WYZ289-091315-
Granite/Green/Ferris/Rattlesnake Mountains-
Including the city of Jeffrey City
515 AM MDT Tue Sep 8 2026
...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT
THURSDAY...
.TODAY...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....71-76.
24 hr trend......1 degree warmer.
Min humidity........13-19 percent.
24 hr trend......4 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900. Winds west
around 20 mph with gusts to around 35 mph after
1200.
Ridge top winds.....Southwest around 15 mph until 1200, then west
around 25 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph until 1200, then around 25
mph.
Mixing Height.......1200-3200 ft agl until 1200, then 6400-8400 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then excellent.
.TONIGHT...
Sky/weather.........Clear.
Chance of thunder...0 percent.
Min temperature.....42-47.
24 hr trend......2 degrees cooler.
Max humidity........49-55 percent.
24 hr trend......10 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......West winds around 20 mph until 2100, then
northwest around 10 mph until 0300, then
downslope/downvalley 4-7 mph. Gusts up to 35
mph.
Ridge top winds.....West around 20 mph until 2400, then north
around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 20 mph until 2400, then north
around 10 mph.
Mixing Height.......3800-5800 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Very good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....70-75.
24 hr trend......1 degree cooler.
Min humidity........7-13 percent.
24 hr trend......6 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900. Winds west
around 20 mph with gusts to around 35 mph after
1500.
Ridge top winds.....Southwest around 10 mph until 1200, then west
around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then west
around 25 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 5600-7600 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Clear. Lows in the mid 40s. West winds around
10 mph.
.THURSDAY...Mostly clear. Lows in the lower 50s. Highs in the
upper 70s. West winds around 15 mph.
.FRIDAY...Mostly clear. Lows in the mid 40s. Highs in the mid
70s. West winds around 15 mph.
.SATURDAY...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows in the mid 40s. Highs in the lower
70s. Southwest winds around 15 mph.
.SUNDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the upper 30s. Highs in the mid 60s.
.MONDAY...Mostly sunny. Highs in the mid 60s.
$$
WYZ300-091315-
Casper Mountain-
515 AM MDT Tue Sep 8 2026
...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT
THURSDAY...
.TODAY...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....70-75.
24 hr trend......Unchanged.
Min humidity........14-20 percent.
24 hr trend......9 percent drier.
20-foot winds.......Southwest winds 10 to 15 mph with gusts to
around 25 mph until 1200, then west around 20
mph with gusts to around 35 mph.
Ridge top winds.....Southwest around 15 mph until 1200, then west
around 25 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 15 mph until 1200, then west
around 30 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 6400-8400 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then excellent.
.TONIGHT...
Sky/weather.........Clear.
Chance of thunder...0 percent.
Min temperature.....43-48.
24 hr trend......6 degrees cooler.
Max humidity........51-57 percent.
24 hr trend......15 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......West winds 10 to 15 mph until 2400, then north
until 0300, then downslope/downvalley 4-7 mph.
Gusts up to 30 mph.
Ridge top winds.....West around 20 mph until 2400, then northeast
around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 20 mph until 2400, then northeast
around 10 mph.
Mixing Height.......3800-5800 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Very good until 2400, then poor.
.WEDNESDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....69-74.
24 hr trend......2 degrees cooler.
Min humidity........8-14 percent.
24 hr trend......5 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
10 to 15 mph with gusts to around 30 mph.
Ridge top winds.....South around 10 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1200, then west
around 20 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 6200-8200 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.Forecast days 3 through 7......
.WEDNESDAY NIGHT...Clear. Lows in the upper 40s. Winds generally
less than 10 mph.
.THURSDAY...Mostly clear. Lows in the mid 50s. Highs in the mid
70s. Southwest winds around 15 mph.
.FRIDAY...Mostly clear. Lows in the mid 40s. Highs in the lower
70s. Northwest winds around 15 mph.
.SATURDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the upper 40s. Highs around 70. South
winds around 10 mph.
.SUNDAY...Mostly clear with chance of showers and slight chance
of thunderstorms. Lows around 40. Highs in the lower 60s.
.MONDAY...Mostly sunny. Slight chance of showers in the morning,
then slight chance of showers and thunderstorms in the afternoon.
Highs in the lower 60s.
$$