Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
406
FNUS55 KRIW 210807
FWFRIW
Fire Weather Planning Forecast for Western and Central Wyoming
National Weather Service Riverton WY
207 AM MDT Thu Aug 21 2025
.DISCUSSION...
...Yellowstone NP and Teton dispatch areas (includes fire weather
zones 140...414...415...and 416)...
Moisture increases some today, mainly for southern zones. Afternoon
RHs trend up 7 to 15 percent higher for zones 414 and 416, with
similar RHs over zones 140 and 415 compared to yesterday. Showers
and thunderstorms are possible (10%-15%) over zones 140 and 415 this
afternoon, with better chances (15%-45%) for zones 414 and 416.
Hazards with any storms will be lightning and gusty outflow winds 30
to 40 mph. Like previous days, showers and storms will likely be dry.
...Cody dispatch area (includes fire weather zones 275...276...
282...283...285...286...287...288...and 289)...
Cooler today with more moisture. High temperatures trend 8 to 15
degrees cooler today, with minimum RHs trending 12 to 20 percent
higher. There is a chance (15%-60%) of showers and thunderstorms
late morning through this evening for all zones. The best chances
will be in the higher elevations and further south in zones 283 and
289. The main hazards with storms will be lightning and gusty
outflow winds 30 to 40 mph, though there is potential for gusts near
50 mph. Though an isolated wetting rain is possible, most showers
and storms will be dry or have very little rain.
...Casper dispatch area (includes fire weather zones 277...278...
279...280...281...285...289...and 300)...
Cooler today with more moisture. High temperatures trend 5 to 15
degrees cooler today, the biggest differences east of the Divide.
Minimum RHs trend 10 to 20 percent higher across the area, with near
25 percent in zones 281 and 285. There is a chance (15%-60%) of
showers and thunderstorms late morning through this evening for all
zones. The best chances will be in the higher elevations and zones
280 and 281. The main hazards with storms will be lightning and
gusty outflow winds 30 to 40 mph, though there is potential for
gusts near 50 mph. Though a very isolated wetting rain is possible,
most showers and storms will be dry or have very little rain.
...Thunderstorms imply strong gusty and erratic winds...
WYZ280-221015-
Natrona County/Casper BLM-
Including the cities of Casper and Midwest
207 AM MDT Thu Aug 21 2025
.TODAY...
Sky/weather.........Partly cloudy. Areas of smoke early in the
morning. Isolated showers in the afternoon.
Isolated thunderstorms in the afternoon.
Scattered showers late in the afternoon. Some
thunderstorms may produce gusty winds in the
afternoon. Chance of precipitation 40 percent.
Chance of thunder...20 percent.
Max temperature.....82-87.
24 hr trend......12 degrees cooler.
Min humidity........28-34 percent.
24 hr trend......21 percent wetter.
20-foot winds.......North winds 10 to 15 mph until 1200, then
northeast. Gusts up to 25 mph.
Ridge top winds.....Northeast 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North 15 to 20 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 4200-6200 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.TONIGHT...
Sky/weather.........Mostly cloudy. Scattered showers and
thunderstorms early in the evening, then
isolated showers and thunderstorms early in the
evening. Areas of smoke early in the evening.
Some thunderstorms may produce gusty winds in
the evening. Chance of precipitation 40
percent.
Chance of thunder...30 percent.
Min temperature.....55-60.
24 hr trend......6 degrees cooler.
Max humidity........80-86 percent.
24 hr trend......37 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......North winds around 15 mph until 2100, then
northeast. Gusts up to 25 mph.
Ridge top winds.....Northeast 15 to 20 mph.
Chc of wetting rain.Less than 5 percent.
Transport winds.....Northeast 15 to 20 mph.
Mixing Height.......1600-3600 ft agl until 2400, then 600-800 ft
agl.
Smoke dispersal.....Poor to fair.
.FRIDAY...
Sky/weather.........Partly cloudy. Isolated showers and
thunderstorms in the morning, then scattered
showers and thunderstorms in the afternoon.
Some thunderstorms may produce gusty winds late
in the morning. Some thunderstorms may produce
gusty winds late in the afternoon. Chance of
precipitation 40 percent.
Chance of thunder...30 percent.
Max temperature.....77-82.
24 hr trend......5 degrees cooler.
Min humidity........38-44 percent.
24 hr trend......10 percent wetter.
20-foot winds.......North winds 10 to 15 mph with gusts to around
30 mph until 1500, then northeast around 20 mph
with gusts to around 30 mph.
Ridge top winds.....North 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast 15 to 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......
.FRIDAY NIGHT...Partly cloudy. Scattered showers and
thunderstorms in the evening, then chance of showers and slight
chance of thunderstorms after midnight. Lows in the mid 50s.
Northeast winds around 15 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the upper 70s.
Northeast winds around 10 mph.
.SUNDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the upper 70s.
Northeast winds around 10 mph.
.MONDAY...Mostly cloudy. Chance of showers and slight chance of
thunderstorms. Lows around 50. Highs in the lower 70s. Winds
generally less than 10 mph.
.TUESDAY THROUGH WEDNESDAY...Partly cloudy with chance of showers
and slight chance of thunderstorms. Lows around 50. Highs 73 to
78.
$$
WYZ283-221015-
Upper Wind River Basin/Wind River Basin-
Including the cities of Crowheart, Lander, Riverton, and Shoshoni
207 AM MDT Thu Aug 21 2025
.TODAY...
Sky/weather.........Partly cloudy. Areas of smoke in the morning.
Scattered showers and isolated thunderstorms in
the afternoon. Some thunderstorms may produce
gusty winds in the afternoon. Chance of
precipitation 50 percent.
Chance of thunder...20 percent.
Max temperature.....82-87.
24 hr trend......11 degrees cooler.
Min humidity........24-30 percent.
24 hr trend......17 percent wetter.
20-foot winds.......North winds around 10 mph until 0900, then east
until 1500, then southeast. Gusts up to 25 mph.
Ridge top winds.....Northeast around 15 mph until 1200, then
southeast.
Chc of wetting rain.Zero percent.
Transport winds.....North around 15 mph until 1200, then southwest.
Mixing Height.......1200-3200 ft agl until 1200, then 5200-7200 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.TONIGHT...
Sky/weather.........Partly cloudy. Isolated dry thunderstorms early
in the evening. Isolated showers in the
evening. Isolated thunderstorms late in the
evening. Some thunderstorms may produce gusty
winds early in the evening. Some thunderstorms
may produce gusty winds late in the evening.
Chance of precipitation 20 percent.
Chance of thunder...20 percent.
Min temperature.....53-58.
24 hr trend......6 degrees cooler.
Max humidity........70-76 percent.
24 hr trend......27 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......Northeast winds 10 to 15 mph until 0300, then
north. Gusts up to 25 mph.
Ridge top winds.....Northeast around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....East around 15 mph.
Mixing Height.......1600-3600 ft agl until 2400, then 600-800 ft
agl.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Partly cloudy. Isolated 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.....79-84.
24 hr trend......3 degrees cooler.
Min humidity........28-34 percent.
24 hr trend......5 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
northeast 10 to 15 mph with gusts to around 25
mph.
Ridge top winds.....North 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast 10 to 15 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 4600-6600 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Partly cloudy. Isolated showers and thunderstorms
in the evening, then slight chance of showers after midnight.
Lows in the mid 50s. Northeast winds around 10 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the lower 80s. Winds
generally less than 10 mph.
.SUNDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs around 80. Winds
generally less than 10 mph.
.MONDAY...Mostly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the lower 50s. Highs in the mid 70s. Winds
generally less than 10 mph.
.TUESDAY...Mostly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the lower 50s. Highs in the mid 70s.
.WEDNESDAY...Partly cloudy. Slight chance of showers in the
morning, then chance of showers and slight chance of
thunderstorms in the afternoon. Highs in the mid 70s.
$$
WYZ285-221015-
South Bighorn Mountains-
207 AM MDT Thu Aug 21 2025
.TODAY...
Sky/weather.........Partly cloudy. Areas of smoke early in the
morning. Areas of smoke late in the afternoon.
Isolated showers and thunderstorms early in the
afternoon. Scattered showers and thunderstorms
late in the afternoon. Some thunderstorms may
produce gusty winds in the afternoon. Chance of
precipitation 50 percent.
Chance of thunder...30 percent.
Max temperature.....77-82.
24 hr trend......11 degrees cooler.
Min humidity........30-36 percent.
24 hr trend......23 percent wetter.
20-foot winds.......Northwest winds 10 to 15 mph until 1200, then
east. Gusts up to 25 mph.
Ridge top winds.....Northwest around 15 mph until 1200, then east.
Chc of wetting rain.Less than 5 percent.
Transport winds.....Northwest around 15 mph until 1200, then south.
Mixing Height.......600-2600 ft agl until 1200, then 4200-6200 ft
agl.
Smoke dispersal.....Poor to fair.
.TONIGHT...
Sky/weather.........Partly cloudy then becoming mostly cloudy.
Areas of smoke early in the evening. Scattered
showers and thunderstorms early in the evening.
Isolated showers and thunderstorms until early
morning. Some thunderstorms may produce gusty
winds early in the evening. Some thunderstorms
may produce gusty winds until early morning.
Chance of precipitation 50 percent.
Chance of thunder...30 percent.
Min temperature.....52-57.
24 hr trend......7 degrees cooler.
Max humidity........75-81 percent.
24 hr trend......35 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......East winds 10 to 15 mph until 0300, then north.
Gusts up to 25 mph.
Ridge top winds.....East around 15 mph.
Chc of wetting rain.Less than 5 percent.
Transport winds.....East around 15 mph.
Mixing Height.......600-2600 ft agl until 2400, then 200-600 ft
agl.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Partly cloudy. Isolated showers and
thunderstorms in the morning, then scattered
showers and thunderstorms in the afternoon.
Some thunderstorms may produce gusty winds in
the late morning and early afternoon. Some
thunderstorms may produce gusty winds late in
the afternoon. Chance of precipitation 40
percent.
Chance of thunder...30 percent.
Max temperature.....70-75.
24 hr trend......6 degrees cooler.
Min humidity........48-54 percent.
24 hr trend......15 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then north
around 10 mph until 1500, then northeast. Gusts
up to 25 mph.
Ridge top winds.....Northwest around 10 mph until 1200, then
northeast around 20 mph.
Chc of wetting rain.Zero percent until 1200, then 10 percent.
Transport winds.....Northwest around 10 mph until 1200, then
northeast around 20 mph.
Mixing Height.......800-2800 ft agl until 1200, then 3200-5200 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Partly cloudy. Scattered showers and
thunderstorms in the evening, then slight chance of showers after
midnight. Lows in the lower 50s. Northeast winds around 10 mph.
.SATURDAY...Mostly clear. Lows in the lower 50s. Highs in the
lower 70s. East winds around 10 mph.
.SUNDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs around 70. Northeast
winds around 10 mph.
.MONDAY...Mostly cloudy. Chance of showers and slight chance of
thunderstorms. Lows around 50. Highs in the upper 60s. Northeast
winds around 10 mph.
.TUESDAY THROUGH WEDNESDAY...Partly cloudy with chance of showers
and slight chance of thunderstorms. Lows around 50. Highs 67 to
72.
$$
WYZ281-221015-
Johnson County/Casper BLM-
Including the cities of Buffalo and Kaycee
207 AM MDT Thu Aug 21 2025
.TODAY...
Sky/weather.........Partly cloudy. Areas of smoke early in the
morning. Isolated showers and thunderstorms in
the afternoon. Scattered showers and
thunderstorms late in the afternoon. Some
thunderstorms may produce gusty winds in the
afternoon. Chance of precipitation 50 percent.
Chance of thunder...30 percent.
Max temperature.....77-82.
24 hr trend......16 degrees cooler.
Min humidity........37-43 percent.
24 hr trend......26 percent wetter.
20-foot winds.......North winds 15 to 20 mph with gusts to around
30 mph.
Ridge top winds.....North 20 to 25 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North 20 to 25 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 4200-6200 ft
agl.
Smoke dispersal.....Fair to good.
.TONIGHT...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
Scattered showers and thunderstorms in the
evening, then isolated showers and
thunderstorms after midnight. Some
thunderstorms may produce gusty winds early in
the evening. Some thunderstorms may produce
gusty winds in the late evening and early
morning. Chance of precipitation 50 percent.
Chance of thunder...30 percent.
Min temperature.....55-60.
24 hr trend......6 degrees cooler.
Max humidity........83-89 percent.
24 hr trend......23 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......North winds around 10 mph with gusts to around
25 mph until 2400, then west with gusts to
around 15 mph until 0300, then
downslope/downvalley 4-7 mph.
Ridge top winds.....North 10 to 15 mph.
Chc of wetting rain.5 percent.
Transport winds.....North 10 to 15 mph.
Mixing Height.......1400-3400 ft agl until 2400, then 600-1200 ft
agl.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Partly cloudy. Isolated showers and
thunderstorms in the morning, then scattered
showers and thunderstorms in the afternoon.
Some thunderstorms may produce gusty winds
early in the morning. Some thunderstorms may
produce gusty winds late in the afternoon.
Chance of precipitation 40 percent.
Chance of thunder...30 percent.
Max temperature.....67-72.
24 hr trend......9 degrees cooler.
Min humidity........52-58 percent.
24 hr trend......11 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900. Winds
north around 20 mph after 1500. Gusts up to 30
mph.
Ridge top winds.....North 15 to 20 mph.
Chc of wetting rain.Less than 5 percent.
Transport winds.....North 15 to 20 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 3800-5000 ft
agl.
Smoke dispersal.....Fair to good.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Partly cloudy. Scattered showers and
thunderstorms in the evening, then slight chance of showers after
midnight. Lows in the mid 50s. North winds around 10 mph.
.SATURDAY...Mostly clear. Lows in the lower 50s. Highs in the mid
70s. Winds generally less than 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows 50 to 55. Highs 73 to 78. Winds
generally less than 10 mph.
.TUESDAY THROUGH WEDNESDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the lower 50s. Highs 75 to 80.
$$
WYZ282-221015-
South Bighorn Basin/Worland BLM-
Including the cities of Ten Sleep, Thermopolis, and Worland
207 AM MDT Thu Aug 21 2025
.TODAY...
Sky/weather.........Partly cloudy. Areas of smoke early in the
morning. Areas of smoke late in the afternoon.
Isolated 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.....79-84.
24 hr trend......10 degrees cooler.
Min humidity........26-32 percent.
24 hr trend......15 percent wetter.
20-foot winds.......Northwest winds around 10 mph with gusts to
around 25 mph until 1200, then northwest around
10 mph and gusty.
Ridge top winds.....Northwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 4600-6600 ft
agl.
Smoke dispersal.....Poor to fair.
.TONIGHT...
Sky/weather.........Partly cloudy. Isolated showers and
thunderstorms in the evening. Areas of smoke
until early morning. Some thunderstorms may
produce gusty winds in the evening. Chance of
precipitation 20 percent.
Chance of thunder...20 percent.
Min temperature.....53-58.
24 hr trend......5 degrees cooler.
Max humidity........74-80 percent.
24 hr trend......17 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......South winds around 10 mph until 0300, then
downslope/downvalley 4-7 mph. Gusts up to 20
mph.
Ridge top winds.....South around 15 mph until 2400, then southwest.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 15 mph until 2400, then west.
Mixing Height.......2000-4000 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Isolated 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.....74-79.
24 hr trend......4 degrees cooler.
Min humidity........37-43 percent.
24 hr trend......5 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
northwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Northwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 4200-6200 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Partly cloudy. Isolated showers and thunderstorms
in the evening. Lows in the mid 50s. North winds around 10 mph.
.SATURDAY...Mostly clear. Lows in the mid 50s. Highs in the lower
80s. Winds generally less than 10 mph.
.SUNDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the lower 80s. Winds
generally less than 10 mph.
.MONDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the mid 50s. Highs in the upper 70s. Winds
generally less than 10 mph.
.TUESDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the mid 50s. Highs in the upper 70s.
.WEDNESDAY...Partly cloudy. Slight chance of showers in the
morning, then chance of showers and slight chance of
thunderstorms in the afternoon. Highs around 80.
$$
WYZ275-221015-
North Bighorn Basin/Worland BLM-
Including the cities of Greybull, Lovell, and Powell
207 AM MDT Thu Aug 21 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Isolated 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......8 degrees cooler.
Min humidity........30-36 percent.
24 hr trend......15 percent wetter.
20-foot winds.......Northwest winds 10 to 15 mph with gusts to
around 25 mph.
Ridge top winds.....Northwest 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 15 to 20 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 4600-6600 ft
agl.
Smoke dispersal.....Fair to good.
.TONIGHT...
Sky/weather.........Partly cloudy. Isolated showers and
thunderstorms in the evening. Isolated showers
and thunderstorms after midnight. Areas of
smoke in the late evening and early morning.
Some thunderstorms may produce gusty winds in
the evening. Some thunderstorms may produce
gusty winds after midnight. Chance of
precipitation 20 percent.
Chance of thunder...10 percent.
Min temperature.....52-57.
24 hr trend......3 degrees cooler.
Max humidity........72-78 percent.
24 hr trend......8 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......Northwest winds 10 to 15 mph. Gusts up to 25
mph until 2400, then 15 mph.
Ridge top winds.....Northwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North around 15 mph.
Mixing Height.......2600-4600 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.FRIDAY...
Sky/weather.........Mostly sunny. Isolated showers and
thunderstorms late in the morning. Some
thunderstorms may produce gusty winds late in
the morning. Chance of precipitation 20
percent.
Chance of thunder...10 percent.
Max temperature.....72-77.
24 hr trend......5 degrees cooler.
Min humidity........37-43 percent.
24 hr trend......4 percent wetter.
20-foot winds.......Northwest winds 10 to 15 mph until 1200, then
around 20 mph. Gusts up to 35 mph.
Ridge top winds.....Northwest 20 to 25 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North 20 to 25 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 4000-6000 ft
agl.
Smoke dispersal.....Fair to good.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Mostly clear. Isolated showers and thunderstorms
in the evening. Lows in the mid 50s. North winds around 10 mph.
.SATURDAY...Mostly clear. Lows in the mid 50s. Highs in the lower
80s. Winds generally less than 10 mph.
.SUNDAY...Partly cloudy. Lows in the mid 50s. Highs in the lower
80s. Winds generally less than 10 mph.
.MONDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the upper 70s. Winds
generally less than 10 mph.
.TUESDAY THROUGH WEDNESDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the mid 50s. Highs in the
lower 80s.
$$
WYZ276-221015-
Cody Foothills-
Including the cities of Clark, Cody, and Meeteetse
207 AM MDT Thu Aug 21 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy. Areas
of smoke early in the morning. Isolated 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.....76-81.
24 hr trend......10 degrees cooler.
Min humidity........35-41 percent.
24 hr trend......20 percent wetter.
20-foot winds.......Northwest winds around 10 mph until 0900, then
north. Gusts up to 25 mph.
Ridge top winds.....North around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North around 20 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 3800-5800 ft
agl.
Smoke dispersal.....Fair to good.
.TONIGHT...
Sky/weather.........Partly cloudy. Isolated showers and
thunderstorms 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.....52-57.
24 hr trend......3 degrees cooler.
Max humidity........68-74 percent.
24 hr trend......11 percent wetter.
Humidity recovery...Good.
20-foot winds.......North winds 10 to 15 mph with gusts to around
25 mph until 2400, then west with gusts to
around 15 mph until 0300, then
downslope/downvalley 4-7 mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North around 15 mph.
Mixing Height.......2000-4000 ft agl until 2400, then 600-1000 ft
agl.
Smoke dispersal.....Poor to fair.
.FRIDAY...
Sky/weather.........Mostly sunny. Isolated 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.....71-76.
24 hr trend......6 degrees cooler.
Min humidity........39-45 percent.
24 hr trend......3 percent wetter.
20-foot winds.......Northwest winds around 10 mph until 0900, then
north around 20 mph. Gusts up to 35 mph.
Ridge top winds.....North 20 to 25 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North 20 to 25 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 3400-5000 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Mostly clear. Isolated showers and thunderstorms
in the evening. Lows in the lower 50s. Northwest winds around
10 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the upper 70s.
Winds generally less than 10 mph.
.SUNDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the mid 70s. Winds
generally less than 10 mph.
.MONDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the lower 50s. Highs in the lower 70s.
Winds generally less than 10 mph.
.TUESDAY THROUGH WEDNESDAY...Partly cloudy with chance of showers
and slight chance of thunderstorms. Lows in the lower 50s. Highs
in the mid 70s.
$$
WYZ287-221015-
Owl Creek Mountains-
207 AM MDT Thu Aug 21 2025
.TODAY...
Sky/weather.........Partly cloudy. Areas of smoke early in the
morning. Scattered showers and thunderstorms in
the afternoon. Some thunderstorms may produce
gusty winds early in the afternoon. Some
thunderstorms may produce gusty winds late in
the afternoon. Chance of precipitation 50
percent.
Chance of thunder...30 percent.
Max temperature.....77-82.
24 hr trend......11 degrees cooler.
Min humidity........28-34 percent.
24 hr trend......20 percent wetter.
20-foot winds.......North winds 10 to 15 mph until 1200, then
northeast. Gusts up to 25 mph.
Ridge top winds.....North around 20 mph until 1200, then northeast.
Chc of wetting rain.Less than 5 percent.
Transport winds.....North around 20 mph until 1200, then south.
Mixing Height.......1000-3000 ft agl until 1200, then 4000-6000 ft
agl.
Smoke dispersal.....Poor to fair.
.TONIGHT...
Sky/weather.........Mostly cloudy. Isolated showers and
thunderstorms in the evening. Some
thunderstorms may produce gusty winds in the
evening. Chance of precipitation 20 percent.
Chance of thunder...20 percent.
Min temperature.....53-58.
24 hr trend......4 degrees cooler.
Max humidity........66-72 percent.
24 hr trend......20 percent wetter.
Humidity recovery...Good.
20-foot winds.......East winds around 10 mph until 2100, then west.
Gusts up to 20 mph.
Ridge top winds.....Northwest around 15 mph until 2400, then west.
Chc of wetting rain.Zero percent.
Transport winds.....North around 15 mph.
Mixing Height.......1400-3400 ft agl until 2400, then 200-800 ft
agl.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Partly cloudy. Isolated showers in the morning,
then scattered showers and thunderstorms in the
afternoon. Some thunderstorms may produce gusty
winds early in the afternoon. Some
thunderstorms may produce gusty winds late in
the afternoon. Chance of precipitation 40
percent.
Chance of thunder...30 percent.
Max temperature.....72-77.
24 hr trend......4 degrees cooler.
Min humidity........34-40 percent.
24 hr trend......5 percent wetter.
20-foot winds.......Northwest winds around 10 mph until 1200, then
north. Gusts up to 25 mph.
Ridge top winds.....North 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North 15 to 20 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 3400-5400 ft
agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Partly cloudy. Isolated showers and thunderstorms
in the evening. Lows in the lower 50s. North winds around 10 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the mid 70s.
Northeast winds around 10 mph.
.SUNDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the mid 70s. Winds
generally less than 10 mph.
.MONDAY...Mostly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the lower 50s. Highs in the upper 60s.
Winds generally less than 10 mph.
.TUESDAY THROUGH WEDNESDAY...Partly cloudy. Chance of showers and
slight chance of thunderstorms. Lows in the lower 50s. Highs
69 to 74.
$$
WYZ286-221015-
Absaroka Mountains/North Shoshone NF-
Including the city of Pahaska
207 AM MDT Thu Aug 21 2025
.TODAY...
Sky/weather.........Partly cloudy. Areas of smoke early in the
morning. Scattered showers and thunderstorms in
the afternoon. Some thunderstorms may produce
gusty winds early in the afternoon. Some
thunderstorms may produce gusty winds late in
the afternoon. Chance of precipitation 50
percent.
Chance of thunder...30 percent.
Max temperature.....70-75.
24 hr trend......6 degrees cooler.
Min humidity........32-38 percent.
24 hr trend......13 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then south
10 to 15 mph with gusts to around 25 mph.
Ridge top winds.....South 15 to 20 mph.
Chc of wetting rain.Less than 5 percent.
Transport winds.....Southwest 15 to 20 mph.
Mixing Height.......2000-4000 ft agl until 1200, then 6200-8200 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.TONIGHT...
Sky/weather.........Partly cloudy. Isolated showers and
thunderstorms 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.....46-51.
24 hr trend......3 degrees cooler.
Max humidity........77-83 percent.
24 hr trend......16 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......East winds around 10 mph until 2400, then
downslope/downvalley 4-7 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 southeast.
Mixing Height.......2400-4400 ft agl until 2400, then 400-1000 ft
agl.
Smoke dispersal.....Poor to fair.
.FRIDAY...
Sky/weather.........Partly cloudy. Isolated showers late in the
morning. Isolated 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.....66-71.
24 hr trend......4 degrees cooler.
Min humidity........38-44 percent.
24 hr trend......6 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then east
10 to 15 mph with gusts to around 25 mph.
Ridge top winds.....East 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 10 mph until 1200, then
northwest around 20 mph.
Mixing Height.......1600-3600 ft agl until 1200, then 4600-6600 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Mostly clear. Isolated showers and thunderstorms
in the evening. Lows in the mid 40s. East winds around 10 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the mid 40s. Highs around 70. Winds
generally less than 10 mph.
.SUNDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the upper 60s.
Winds generally less than 10 mph.
.MONDAY...Mostly cloudy with chance of showers and thunderstorms.
Lows in the mid 40s. Highs in the lower 60s. Winds generally less
than 10 mph.
.TUESDAY THROUGH WEDNESDAY...Mostly cloudy with chance of showers
and thunderstorms. Lows in the mid 40s. Highs in the lower 60s.
$$
WYZ140-221015-
Yellowstone National Park-
Including the cities of Lake, Mammoth, and Old Faithful
207 AM MDT Thu Aug 21 2025
.TODAY...
Sky/weather.........Mostly sunny. Areas of smoke until late
afternoon. Isolated 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.....75-80.
24 hr trend......1 degree warmer.
Min humidity........19-25 percent.
24 hr trend......2 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
10 to 15 mph with gusts to around 25 mph.
Ridge top winds.....Northeast 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 20 mph.
Mixing Height.......2000-4000 ft agl until 1200, then 8200-10200 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then excellent.
.TONIGHT...
Sky/weather.........Partly cloudy. Areas of smoke.
Chance of thunder...0 percent.
Min temperature.....42-47.
24 hr trend......2 degrees cooler.
Max humidity........73-79 percent.
24 hr trend......6 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......West winds around 10 mph until 2100, then
northeast until 2400, then downslope/downvalley
4-7 mph. Gusts up to 20 mph.
Ridge top winds.....Northwest around 15 mph until 2400, then east.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph until 2400, then east.
Mixing Height.......4000-6000 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.FRIDAY...
Sky/weather.........Mostly sunny. Areas of smoke until late
afternoon. Isolated 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.....72-77.
24 hr trend......2 degrees cooler.
Min humidity........23-29 percent.
24 hr trend......2 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
northwest around 10 mph with higher gusts.
Ridge top winds.....Northeast around 10 mph until 1200, then
northwest.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast around 10 mph until 1200, then west.
Mixing Height.......1800-3800 ft agl until 1200, then 7200-9200 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Mostly clear. Lows in the lower 40s. Winds
generally less than 10 mph.
.SATURDAY...Mostly clear. Lows in the lower 40s. Highs in the mid
70s. Winds generally less than 10 mph.
.SUNDAY...Mostly cloudy. Slight chance of showers and
thunderstorms. Lows in the mid 40s. Highs in the mid 70s. Winds
generally less than 10 mph.
.MONDAY...Mostly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the lower 40s. Highs in the upper 60s.
Winds generally less than 10 mph.
.TUESDAY THROUGH WEDNESDAY...Mostly cloudy with chance of showers
and thunderstorms. Lows in the lower 40s. Highs 65 to 70.
$$
WYZ415-221015-
North Zone Bridger Teton NF and Grand Teton NP-
Including the cities of Jackson and Moran
207 AM MDT Thu Aug 21 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy. Areas
of smoke in the afternoon. Isolated 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.....77-82.
24 hr trend......1 degree cooler.
Min humidity........20-26 percent.
24 hr trend......1 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
10 to 15 mph with gusts to around 25 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.......2400-4400 ft agl until 1200, then 8800-10800 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good to
excellent.
.TONIGHT...
Sky/weather.........Partly cloudy. Areas of smoke late in the
evening.
Chance of thunder...0 percent.
Min temperature.....45-50.
24 hr trend......2 degrees cooler.
Max humidity........57-63 percent.
24 hr trend......1 percent drier.
Humidity recovery...Good.
20-foot winds.......West winds around 10 mph and gusty until 2100,
then downslope/downvalley 4-7 mph.
Ridge top winds.....West around 10 mph until 2400, then southeast.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph until 2400, then south.
Mixing Height.......4200-6200 ft agl until 2400, then 400-1000 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.FRIDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Isolated 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......1 degree cooler.
Min humidity........16-22 percent.
24 hr trend......3 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
10 to 15 mph. Gusts up to 20 mph.
Ridge top winds.....South around 10 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1200, then west
around 20 mph.
Mixing Height.......2200-4200 ft agl until 1200, then 8600-10600 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good to
excellent.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Mostly clear. Lows in the mid 40s. East winds
around 10 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the upper 70s.
Winds generally less than 10 mph.
.SUNDAY...Mostly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the upper 40s. Highs in the mid 70s. Winds
generally less than 10 mph.
.MONDAY...Mostly cloudy with showers likely and chance of
thunderstorms. Lows in the mid 40s. Highs in the upper 60s. Winds
generally less than 10 mph.
.TUESDAY...Mostly cloudy with showers likely and chance of
thunderstorms. Lows in the mid 40s. Highs in the mid 60s.
.WEDNESDAY...Mostly cloudy. Chance of showers in the morning,
then showers likely and chance of thunderstorms in the afternoon.
Highs in the mid 60s.
$$
WYZ416-221015-
West Wind River Mountains/East Zone Bridger Teton NF-
207 AM MDT Thu Aug 21 2025
.TODAY...
Sky/weather.........Partly cloudy. Scattered showers through the
day. Scattered thunderstorms in the afternoon.
Some thunderstorms may produce gusty winds
early in the afternoon. Some thunderstorms may
produce gusty winds late in the afternoon.
Chance of precipitation 50 percent.
Chance of thunder...30 percent.
Max temperature.....71-76.
24 hr trend......8 degrees cooler.
Min humidity........27-33 percent.
24 hr trend......15 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
southwest 10 to 15 mph. Gusts up to 25 mph.
Ridge top winds.....Southwest 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 15 to 20 mph.
Mixing Height.......2600-4600 ft agl until 1200, then 6000-8000 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good to very
good.
.TONIGHT...
Sky/weather.........Partly cloudy. Isolated showers and
thunderstorms 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.....46-51.
24 hr trend......4 degrees cooler.
Max humidity........60-66 percent.
24 hr trend......1 percent wetter.
Humidity recovery...Good.
20-foot winds.......West winds around 10 mph until 2100, then
northeast until 2400, then downslope/downvalley
4-7 mph. Gusts up to 20 mph.
Ridge top winds.....Northwest around 15 mph until 2400, then
northeast.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph until 2400, then northeast.
Mixing Height.......2800-4800 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.FRIDAY...
Sky/weather.........Partly cloudy. Isolated 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.....72-77.
24 hr trend......1 degree warmer.
Min humidity........20-26 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 25 mph.
Ridge top winds.....South around 10 mph until 1200, then west
around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph until 1200, then around 20
mph.
Mixing Height.......2600-4600 ft agl until 1200, then 8800-10800 ft
agl.
Smoke dispersal.....Fair to good until 1200, then excellent.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Mostly clear. Isolated showers and thunderstorms
in the evening. Lows in the mid 40s. Northeast winds around
10 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the mid 40s. Highs in the lower 70s. Winds
generally less than 10 mph.
.SUNDAY...Mostly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the mid 40s. Highs around 70. Winds
generally less than 10 mph.
.MONDAY...Mostly cloudy with showers likely and chance of
thunderstorms. Lows in the lower 40s. Highs in the lower 60s.
Winds generally less than 10 mph.
.TUESDAY THROUGH WEDNESDAY...Mostly cloudy with showers likely
and chance of thunderstorms. Lows in the lower 40s. Highs around
60.
$$
WYZ288-221015-
East Wind River Mountains/South Shoshone NF-
Including the cities of Dubois and South Pass
207 AM MDT Thu Aug 21 2025
.TODAY...
Sky/weather.........Partly cloudy. Isolated showers in the morning,
then scattered showers and thunderstorms in the
afternoon. Some thunderstorms may produce gusty
winds early in the afternoon. Some
thunderstorms may produce gusty winds late in
the afternoon. Chance of precipitation 50
percent.
Chance of thunder...30 percent.
Max temperature.....73-78.
24 hr trend......10 degrees cooler.
Min humidity........27-33 percent.
24 hr trend......19 percent wetter.
20-foot winds.......Southwest winds 10 to 15 mph with gusts to
around 25 mph.
Ridge top winds.....Southwest 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 15 to 20 mph.
Mixing Height.......2000-4000 ft agl until 1200, then 5600-7600 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.TONIGHT...
Sky/weather.........Partly cloudy. Isolated showers and dry
thunderstorms early 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.....48-53.
24 hr trend......6 degrees cooler.
Max humidity........68-74 percent.
24 hr trend......19 percent wetter.
Humidity recovery...Good.
20-foot winds.......West winds around 10 mph and gusty.
Ridge top winds.....West around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph.
Mixing Height.......2200-4200 ft agl until 2400, then 400-800 ft
agl.
Smoke dispersal.....Poor to fair.
.FRIDAY...
Sky/weather.........Partly cloudy. Isolated 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.....72-77.
24 hr trend......1 degree cooler.
Min humidity........29-35 percent.
24 hr trend......2 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
northeast 10 to 15 mph. Gusts up to 20 mph.
Ridge top winds.....Northwest around 10 mph until 1200, then
northeast.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......1800-3800 ft agl until 1200, then 6000-8000 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good to very
good.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Partly cloudy. Isolated showers and thunderstorms
in the evening. Lows in the upper 40s. Northeast winds around
10 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the lower 70s.
East winds around 10 mph.
.SUNDAY...Mostly cloudy. Chance of showers and thunderstorms.
Lows in the upper 40s. Highs around 70. Winds generally less than
10 mph.
.MONDAY...Mostly cloudy with showers likely and chance of
thunderstorms. Lows in the mid 40s. Highs in the lower 60s. Winds
generally less than 10 mph.
.TUESDAY...Mostly cloudy with showers likely and slight chance of
thunderstorms. Lows in the upper 40s. Highs in the lower 60s.
.WEDNESDAY...Mostly cloudy. Chance of showers in the morning,
then showers likely and slight chance of thunderstorms in the
afternoon. Highs in the lower 60s.
$$
WYZ414-221015-
Salt and Wyoming Ranges/West Zone Bridger Teton NF-
Including the city of Afton
207 AM MDT Thu Aug 21 2025
.TODAY...
Sky/weather.........Partly cloudy. Isolated thunderstorms early in
the morning. Isolated showers through the day.
Isolated thunderstorms in the late morning and
afternoon. Some thunderstorms may produce gusty
winds early in the morning. Some thunderstorms
may produce gusty winds in the late morning and
afternoon. Chance of precipitation 20 percent.
Chance of thunder...20 percent.
Max temperature.....77-82.
24 hr trend......4 degrees cooler.
Min humidity........20-26 percent.
24 hr trend......8 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
southwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 10 to 15 mph.
Mixing Height.......2200-4200 ft agl until 1200, then 7400-9400 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....46-51.
24 hr trend......2 degrees cooler.
Max humidity........58-64 percent.
24 hr trend......10 percent drier.
Humidity recovery...Good.
20-foot winds.......West winds around 10 mph and gusty 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 around 15 mph until 2400, then
southwest.
Mixing Height.......3800-5800 ft agl until 2400, then 400-1000 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.FRIDAY...
Sky/weather.........Partly cloudy.
Chance of thunder...10 percent.
Max temperature.....77-82.
24 hr trend......Unchanged.
Min humidity........15-21 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 25 mph.
Ridge top winds.....West 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.......2600-4600 ft agl until 1200, then 9400-11400 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then excellent.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Mostly clear. Lows in the upper 40s. Winds
generally less than 10 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows around 50. Highs in the upper 70s. Winds
generally less than 10 mph.
.SUNDAY...Mostly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the upper 40s. Highs in the upper 70s.
Winds generally less than 10 mph.
.MONDAY...Mostly cloudy with showers likely and chance of
thunderstorms. Lows in the upper 40s. Highs around 70. Winds
generally less than 10 mph.
.TUESDAY THROUGH WEDNESDAY...Mostly cloudy with showers likely
and chance of thunderstorms. Lows in the upper 40s. Highs 63 to
68.
$$
WYZ277>279-221015-
Lincoln and Uinta Counties/Lower Elevations-
Upper Green River Basin/Rock Springs BLM-
Sweetwater County/Rock Springs BLM/Flaming Gorge NRA-
Including the cities of Evanston, Fort Bridger, Kemmerer,
Big Piney, Farson, Pinedale, Green River, Rock Springs,
and Wamsutter
207 AM MDT Thu Aug 21 2025
.TODAY...
Sky/weather.........Partly cloudy. Isolated showers and
thunderstorms through the day. Some
thunderstorms may produce gusty winds. Chance
of precipitation 20 percent.
Chance of thunder...20 percent.
Max temperature.....78-83.
24 hr trend......7 degrees cooler.
Min humidity........21-27 percent.
24 hr trend......13 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
northeast around 10 mph and gusty until 1200,
then west with gusts to around 25 mph.
Ridge top winds.....North around 10 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....North around 10 mph until 1200, then west.
Mixing Height.......1800-3800 ft agl until 1200, then 7400-9400 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.TONIGHT...
Sky/weather.........Partly cloudy. Isolated showers and
thunderstorms early 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.....49-54.
24 hr trend......4 degrees cooler.
Max humidity........57-63 percent.
24 hr trend......17 percent wetter.
Humidity recovery...Good.
20-foot winds.......West winds around 10 mph until 2100, then east
until 2400, then downslope/downvalley 4-7 mph
until 0300, then north around 10 mph. Gusts up
to 20 mph.
Ridge top winds.....West around 15 mph until 2400, then northeast.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph until 2400, then
northeast.
Mixing Height.......2400-4400 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor to fair until 2400, then poor.
.FRIDAY...
Sky/weather.........Partly cloudy. Isolated 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......Unchanged.
Min humidity........21-27 percent.
24 hr trend......3 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then west
around 15 mph with gusts to around 25 mph.
Ridge top winds.....North around 10 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast around 10 mph until 1200, then west.
Mixing Height.......1600-3600 ft agl until 1200, then 7800-9800 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Partly cloudy. Lows in the lower 50s. Northeast
winds around 10 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the lower 80s.
Winds generally less than 10 mph.
.SUNDAY...Mostly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the lower 50s. Highs around 80. Winds
generally less than 10 mph.
.MONDAY...Mostly cloudy with showers likely and chance of
thunderstorms. Lows in the upper 40s. Highs in the mid 70s. Winds
generally less than 10 mph.
.TUESDAY...Mostly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the upper 40s. Highs in the lower 70s.
.WEDNESDAY...Mostly cloudy. Chance of showers in the morning,
then showers likely and chance of thunderstorms in the afternoon.
Highs around 70.
$$
WYZ289-221015-
Granite/Green/Ferris/Rattlesnake Mountains-
Including the city of Jeffrey City
207 AM MDT Thu Aug 21 2025
.TODAY...
Sky/weather.........Partly cloudy. Isolated showers late in the
morning. Isolated thunderstorms in the
afternoon. Scattered showers late in the
afternoon. Some thunderstorms may produce gusty
winds in the afternoon. Chance of precipitation
50 percent.
Chance of thunder...20 percent.
Max temperature.....78-83.
24 hr trend......10 degrees cooler.
Min humidity........21-27 percent.
24 hr trend......16 percent wetter.
20-foot winds.......North winds around 10 mph and gusty until 1200,
then west with gusts to around 25 mph.
Ridge top winds.....North around 15 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....North around 15 mph until 1200, then west.
Mixing Height.......1800-3800 ft agl until 1200, then 6400-8400 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.TONIGHT...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
Scattered showers and isolated dry
thunderstorms in the evening. Some
thunderstorms may produce gusty winds early in
the evening. Some thunderstorms may produce
gusty winds late in the evening. Chance of
precipitation 40 percent.
Chance of thunder...20 percent.
Min temperature.....53-58.
24 hr trend......6 degrees cooler.
Max humidity........74-80 percent.
24 hr trend......33 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......Southwest winds around 10 mph until 2100, then
east. Gusts up to 25 mph.
Ridge top winds.....East around 15 mph.
Chc of wetting rain.Less than 5 percent.
Transport winds.....East around 15 mph.
Mixing Height.......1800-3800 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Partly cloudy. Isolated 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.....76-81.
24 hr trend......1 degree cooler.
Min humidity........24-30 percent.
24 hr trend......2 percent wetter.
20-foot winds.......North winds 10 to 15 mph. Gusts up to 15 mph
until 1200, then 25 mph.
Ridge top winds.....North around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North around 15 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 5800-7800 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Partly cloudy. Isolated showers and thunderstorms
in the evening, then slight chance of showers and thunderstorms
after midnight. Lows in the lower 50s. Northeast winds around
15 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the upper 70s.
Northeast winds around 10 mph.
.SUNDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the lower 50s. Highs in the upper 70s.
Northeast winds around 10 mph.
.MONDAY...Mostly cloudy with showers likely and chance of
thunderstorms. Lows around 50. Highs in the lower 70s. Winds
generally less than 10 mph.
.TUESDAY...Mostly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the upper 40s. Highs in the lower 70s.
.WEDNESDAY...Partly cloudy. Slight chance of showers in the
morning, then chance of showers and slight chance of
thunderstorms in the afternoon. Highs in the lower 70s.
$$
WYZ300-221015-
Casper Mountain-
207 AM MDT Thu Aug 21 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy. Areas
of smoke late in the morning. Isolated showers
and thunderstorms early in the afternoon.
Scattered showers and thunderstorms late in the
afternoon, then isolated showers and
thunderstorms late in the afternoon. Some
thunderstorms may produce gusty winds in the
afternoon. Chance of precipitation 30 percent.
Chance of thunder...30 percent.
Max temperature.....77-82.
24 hr trend......10 degrees cooler.
Min humidity........30-36 percent.
24 hr trend......20 percent wetter.
20-foot winds.......North winds 10 to 15 mph with gusts to around
25 mph.
Ridge top winds.....North around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North around 15 mph.
Mixing Height.......1000-3000 ft agl until 1200, then 4800-6800 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good.
.TONIGHT...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
Scattered showers and thunderstorms in the
evening. Some thunderstorms may produce gusty
winds early in the evening. Some thunderstorms
may produce gusty winds late in the evening.
Chance of precipitation 40 percent.
Chance of thunder...30 percent.
Min temperature.....54-59.
24 hr trend......5 degrees cooler.
Max humidity........74-80 percent.
24 hr trend......31 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......North winds around 10 mph until 2100, then
southeast. Gusts up to 20 mph.
Ridge top winds.....Northeast around 15 mph until 2400, then
southeast.
Chc of wetting rain.10 percent until 2400, then zero percent.
Transport winds.....East around 15 mph until 2400, then southeast.
Mixing Height.......1200-3200 ft agl until 2400, then 200-600 ft
agl.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Partly cloudy. Isolated showers in the morning,
then scattered showers and thunderstorms in the
afternoon. Some thunderstorms may produce gusty
winds early in the afternoon. Some
thunderstorms may produce gusty winds late in
the afternoon. Chance of precipitation 40
percent.
Chance of thunder...40 percent.
Max temperature.....73-78.
24 hr trend......3 degrees cooler.
Min humidity........39-45 percent.
24 hr trend......9 percent wetter.
20-foot winds.......Southeast winds around 10 mph and gusty until
0900, then upslope/upvalley 5-9 mph until 1200,
then north 10 to 15 mph with gusts to around 30
mph.
Ridge top winds.....Southeast around 10 mph until 1200, then north
around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1200, then north
around 20 mph.
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......
.FRIDAY NIGHT...Partly cloudy. Scattered showers and
thunderstorms in the evening, then chance of showers and slight
chance of thunderstorms after midnight. Lows in the lower 50s.
Northeast winds around 10 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the lower 70s.
Winds generally less than 10 mph.
.SUNDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the lower 50s. Highs in the lower 70s.
Winds generally less than 10 mph.
.MONDAY...Mostly cloudy with showers likely and chance of
thunderstorms. Lows in the upper 40s. Highs in the mid 60s. Winds
generally less than 10 mph.
.TUESDAY...Mostly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the upper 40s. Highs in the upper 60s.
.WEDNESDAY...Partly cloudy. Slight chance of showers in the
morning, then chance of showers and slight chance of
thunderstorms in the afternoon. Highs in the upper 60s.
$$