Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
Versions:
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FNUS55 KRIW 041202
FWFRIW
Fire Weather Planning Forecast for Western and Central Wyoming
National Weather Service Riverton WY
501 AM MST Thu Dec 4 2025
.DISCUSSION...
***This product is currently automated with no discussion
and will not be refreshed with all forecast updates. It should
be used for planning purposes only. If you need additional fire
weather information, please contact the NWS office in Riverton,
Wyoming. The human written discussion section along with the fire
weather forecast will resume regular operations sometime in
Spring 2026.***
---Thunderstorms imply strong gusty and erratic winds---
WYZ280-042300-
Natrona County/Casper BLM-
Including the cities of Casper and Midwest
501 AM MST Thu Dec 4 2025
.TODAY...
Sky/weather.........Partly cloudy then becoming mostly sunny then
becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....32-37.
24 hr trend......5 degrees warmer.
Min humidity........47-53 percent.
24 hr trend......16 percent drier.
20-foot winds.......Southwest winds around 15 mph with gusts to
around 25 mph.
Ridge top winds.....Southwest around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 20 to 25 mph.
Mixing Height.......600-2600 ft agl.
Smoke dispersal.....Poor.
.TONIGHT...
Sky/weather.........Partly cloudy then becoming mostly cloudy.
Slight chance of snow showers after midnight.
Chance of snow 20 percent.
Chance of thunder...0 percent.
Min temperature.....20-25.
24 hr trend......8 degrees warmer.
Max humidity........76-82 percent.
24 hr trend......5 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Southwest winds around 15 mph and gusty.
Ridge top winds.....Southwest 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 15 to 20 mph.
Mixing Height.......400-800 ft agl.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Partly cloudy. Chance of snow showers late in
the afternoon. Chance of snow 50 percent.
Chance of thunder...0 percent.
Max temperature.....33-38.
24 hr trend......1 degree warmer.
Min humidity........62-68 percent.
24 hr trend......11 percent wetter.
20-foot winds.......Southwest winds 10 to 15 mph with higher gusts.
Ridge top winds.....Southwest 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 15 to 20 mph.
Mixing Height.......600-2600 ft agl until 1700, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Mostly cloudy with chance of snow showers. Lows
in the lower 20s. Southwest winds around 15 mph.
.SATURDAY...Partly cloudy with chance of snow showers. Lows
around 18. Highs in the upper 30s. West winds around 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy. Lows 23 to 28. Highs
38 to 43. Southwest winds around 15 mph.
.TUESDAY THROUGH WEDNESDAY...Mostly cloudy with chance of showers
and snow showers. Lows around 30. Highs 45 to 50.
$$
WYZ283-042300-
Upper Wind River Basin/Wind River Basin-
Including the cities of Crowheart, Lander, Riverton, and Shoshoni
501 AM MST Thu Dec 4 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....32-37.
24 hr trend......3 degrees warmer.
Min humidity........50-56 percent.
24 hr trend......9 percent drier.
20-foot winds.......West winds around 10 mph with higher gusts.
Ridge top winds.....West around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 15 to 20 mph.
Mixing Height.......600-2200 ft agl.
Smoke dispersal.....Poor.
.TONIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....18-23.
24 hr trend......5 degrees warmer.
Max humidity........75-81 percent.
24 hr trend......5 percent drier.
Humidity recovery...Excellent.
20-foot winds.......West winds 10 to 15 mph and gusty.
Ridge top winds.....West 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 15 to 20 mph.
Mixing Height.......600-800 ft agl.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Partly cloudy. Chance of snow showers late in
the afternoon. Chance of snow 50 percent.
Chance of thunder...0 percent.
Max temperature.....34-39.
24 hr trend......1 degree warmer.
Min humidity........59-65 percent.
24 hr trend......7 percent wetter.
20-foot winds.......Southwest winds around 10 mph until 0900, then
upslope/upvalley 5-9 mph until 1200, then south
around 10 mph. Gusts up to 15 mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph until 1600, then south.
Mixing Height.......400-2400 ft agl.
Smoke dispersal.....Poor.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Mostly cloudy with chance of snow showers. Lows
in the lower 20s. Southwest winds around 15 mph.
.SATURDAY...Partly cloudy with slight chance of snow showers.
Lows around 19. Highs in the upper 30s. West winds around 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy. Lows 22 to 27. Highs
38 to 43. Southwest winds around 10 mph.
.TUESDAY...Partly cloudy. Slight chance of showers and snow
showers. Lows around 30. Highs around 50.
.WEDNESDAY...Partly cloudy with chance of showers and snow
showers. Highs in the upper 40s.
$$
WYZ285-042300-
South Bighorn Mountains-
501 AM MST Thu Dec 4 2025
...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO
2 PM MST SATURDAY...
.TODAY...
Sky/weather.........Partly cloudy then becoming mostly sunny then
becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....29-34.
24 hr trend......5 degrees warmer.
Min humidity........46-52 percent.
24 hr trend......16 percent drier.
20-foot winds.......West winds around 15 mph with gusts to around
25 mph.
Ridge top winds.....West 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 20 to 25 mph.
Mixing Height.......200-2000 ft agl.
Smoke dispersal.....Poor.
.TONIGHT...
Sky/weather.........Partly cloudy then becoming mostly cloudy then
becoming partly cloudy. Slight chance of snow
showers late in the evening. Chance of snow
showers after midnight, then slight chance of
snow showers early in the morning. Chance of
snow 50 percent.
Chance of thunder...0 percent.
Min temperature.....17-22.
24 hr trend......3 degrees warmer.
Max humidity........73-79 percent.
24 hr trend......8 percent drier.
Humidity recovery...Excellent.
20-foot winds.......West winds 10 to 15 mph and gusty.
Ridge top winds.....West 15 to 20 mph.
Chc of wetting rain.Less than 5 percent.
Transport winds.....West 15 to 20 mph.
Mixing Height.......200-600 ft agl.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Partly cloudy. Slight chance of snow showers
late in the afternoon. Chance of snow 20
percent.
Chance of thunder...0 percent.
Max temperature.....27-32.
24 hr trend......Unchanged.
Min humidity........63-69 percent.
24 hr trend......13 percent wetter.
20-foot winds.......West winds around 10 mph with higher gusts.
Ridge top winds.....West around 15 mph until 1600, then southwest.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 15 to 20 mph until 1700, then
southwest.
Mixing Height.......200-2000 ft agl.
Smoke dispersal.....Poor.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Mostly cloudy. Slight chance of snow showers in
the evening, then chance of snow showers after midnight. Lows in
the lower 20s. Southwest winds around 15 mph.
.SATURDAY...Partly cloudy with chance of snow showers. Lows
around 20. Highs in the lower 30s. West winds around 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy. Lows 22 to 27. Highs
31 to 36. West winds around 15 mph.
.TUESDAY THROUGH WEDNESDAY...Mostly cloudy with chance of snow
showers and showers. Lows in the upper 20s. Highs 39 to 44.
$$
WYZ281-042300-
Johnson County/Casper BLM-
Including the cities of Buffalo and Kaycee
501 AM MST Thu Dec 4 2025
.TODAY...
Sky/weather.........Partly cloudy then becoming mostly sunny then
becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....33-38.
24 hr trend......9 degrees warmer.
Min humidity........42-48 percent.
24 hr trend......23 percent drier.
20-foot winds.......Southwest winds around 10 mph and gusty.
Ridge top winds.....Southwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 15 to 20 mph.
Mixing Height.......600-2600 ft agl until 1300, then 1400-3000 ft
agl until 1600, then 400-800 ft agl.
Smoke dispersal.....Poor.
.TONIGHT...
Sky/weather.........Mostly cloudy. Slight chance of snow showers
early in the morning. Chance of snow 20
percent.
Chance of thunder...0 percent.
Min temperature.....21-26.
24 hr trend......6 degrees warmer.
Max humidity........81-87 percent.
24 hr trend......Unchanged.
Humidity recovery...Excellent.
20-foot winds.......West winds around 10 mph with gusts to around
15 mph.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph.
Mixing Height.......400-800 ft agl.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....32-37.
24 hr trend......3 degrees cooler.
Min humidity........64-70 percent.
24 hr trend......21 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
around 10 mph until 1500, then south. Gusts up
to 15 mph.
Ridge top winds.....West 10 to 15 mph until 1700, then south.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph until 1600, then south.
Mixing Height.......600-2600 ft agl until 1700, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Mostly cloudy. Slight chance of snow showers
after midnight. Lows in the lower 20s. Southwest winds around
10 mph.
.SATURDAY...Mostly cloudy with slight chance of snow showers.
Lows around 19. Highs in the mid 30s. West winds around 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy. Lows 23 to 28. Highs
40 to 45. Southwest winds around 10 mph.
.TUESDAY...Mostly cloudy with chance of showers and snow showers.
Lows in the mid 20s. Highs around 50.
.WEDNESDAY...Mostly cloudy. Chance of snow showers and slight
chance of showers in the morning, then chance of snow showers and
showers in the afternoon. Highs in the lower 40s.
$$
WYZ282-042300-
South Bighorn Basin/Worland BLM-
Including the cities of Ten Sleep, Thermopolis, and Worland
501 AM MST Thu Dec 4 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....29-34.
24 hr trend......3 degrees warmer.
Min humidity........46-52 percent.
24 hr trend......14 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....South around 10 mph until 1400, then southeast.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1600, then east.
Mixing Height.......400-2200 ft agl.
Smoke dispersal.....Poor.
.TONIGHT...
Sky/weather.........Mostly cloudy. Chance of snow showers after
midnight. Slight chance of snow showers early
in the morning. Chance of snow 50 percent.
Chance of thunder...0 percent.
Min temperature.....17-22.
24 hr trend......4 degrees warmer.
Max humidity........78-84 percent.
24 hr trend......2 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph.
Ridge top winds.....Southeast around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 10 mph.
Mixing Height.......400-800 ft agl.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Partly cloudy. Slight chance of snow showers
late in the afternoon. Chance of snow 20
percent.
Chance of thunder...0 percent.
Max temperature.....29-34.
24 hr trend......1 degree cooler.
Min humidity........61-67 percent.
24 hr trend......15 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph.
Ridge top winds.....South around 10 mph until 1600, then southeast.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 10 mph until 0800, then
southwest until 1100, then northwest until
1300, then south.
Mixing Height.......400-2200 ft agl.
Smoke dispersal.....Poor.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Mostly cloudy. Slight chance of snow showers in
the evening, then chance of snow showers after midnight. Lows in
the lower 20s. Winds generally less than 10 mph.
.SATURDAY...Mostly cloudy. Slight chance of snow showers. Lows
around 18. Highs in the upper 30s. Winds generally less than
10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy. Lows 21 to 26. Highs
39 to 44. Winds generally less than 10 mph.
.TUESDAY THROUGH WEDNESDAY...Mostly cloudy with chance of showers
and snow showers. Lows in the upper 20s. Highs 45 to 50.
$$
WYZ275-042300-
North Bighorn Basin/Worland BLM-
Including the cities of Greybull, Lovell, and Powell
501 AM MST Thu Dec 4 2025
.TODAY...
Sky/weather.........Partly cloudy then becoming mostly cloudy.
Slight chance of snow showers late in the
afternoon. Chance of snow 20 percent.
Chance of thunder...0 percent.
Max temperature.....28-33.
24 hr trend......2 degrees warmer.
Min humidity........51-57 percent.
24 hr trend......9 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then south
around 10 mph. Gusts up to 15 mph.
Ridge top winds.....South 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....South 10 to 15 mph.
Mixing Height.......400-2400 ft agl.
Smoke dispersal.....Poor.
.TONIGHT...
Sky/weather.........Mostly cloudy. Chance of snow showers. Chance
of snow 50 percent.
Chance of thunder...0 percent.
Min temperature.....17-22.
24 hr trend......3 degrees warmer.
Max humidity........82-88 percent.
24 hr trend......3 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......Downslope/downvalley 4-7 mph.
Ridge top winds.....Southeast around 10 mph.
Chc of wetting rain.7 percent.
Transport winds.....South 10 to 15 mph.
Mixing Height.......400-800 ft agl.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Mostly cloudy. Slight chance of snow showers,
then chance of snow showers late in the
afternoon. Chance of snow 50 percent.
Chance of thunder...0 percent.
Max temperature.....27-32.
24 hr trend......2 degrees cooler.
Min humidity........68-74 percent.
24 hr trend......19 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southeast around 10 mph. Gusts up to 15 mph.
Ridge top winds.....South 10 to 15 mph until 1700, then southeast.
Chc of wetting rain.Less than 5 percent.
Transport winds.....Southwest around 10 mph until 0900, then
northwest until 1200, then north until 1300,
then southeast.
Mixing Height.......400-1800 ft agl.
Smoke dispersal.....Poor.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Mostly cloudy with chance of snow showers. Lows
in the lower 20s. Winds generally less than 10 mph.
.SATURDAY...Mostly cloudy with chance of snow showers. Lows
around 18. Highs in the mid 30s. Winds generally less than
10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy. Lows 21 to 26. Highs
36 to 41. South winds around 10 mph.
.TUESDAY THROUGH WEDNESDAY...Mostly cloudy with chance of showers
and snow showers. Lows in the upper 20s. Highs 41 to 46.
$$
WYZ276-042300-
Cody Foothills-
Including the cities of Clark, Cody, and Meeteetse
501 AM MST Thu Dec 4 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy then
becoming mostly cloudy. Slight chance of snow
showers late in the afternoon. Chance of snow
20 percent.
Chance of thunder...0 percent.
Max temperature.....32-37.
24 hr trend......3 degrees warmer.
Min humidity........48-54 percent.
24 hr trend......3 percent drier.
20-foot winds.......West winds 15 to 20 mph with gusts to around 30
mph.
Ridge top winds.....West 20 to 25 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 25 to 30 mph until 1700, then around 20
mph.
Mixing Height.......600-2600 ft agl.
Smoke dispersal.....Poor.
.TONIGHT...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
Slight chance of snow showers. Chance of snow
20 percent.
Chance of thunder...0 percent.
Min temperature.....19-24.
24 hr trend......4 degrees warmer.
Max humidity........72-78 percent.
24 hr trend......4 percent drier.
Humidity recovery...Excellent.
20-foot winds.......West winds 15 to 20 mph with gusts to around 25
mph until 0300, then around 10 mph with gusts
to around 15 mph.
Ridge top winds.....West 20 to 25 mph until 0200, then 10 to 15
mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 20 to 25 mph until 0300, then around 15
mph.
Mixing Height.......600-1200 ft agl.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Partly cloudy then becoming mostly cloudy.
Slight chance of snow showers in the morning.
Chance of snow showers late in the morning,
then snow showers likely late in the afternoon.
Little or no snow accumulation. Chance of snow
70 percent.
Chance of thunder...0 percent.
Max temperature.....33-38.
24 hr trend......1 degree cooler.
Min humidity........61-67 percent.
24 hr trend......12 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then south
around 10 mph. Gusts up to 15 mph.
Ridge top winds.....Southwest 10 to 15 mph until 1100, then south.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph until 1300, then south.
Mixing Height.......600-2600 ft agl.
Smoke dispersal.....Poor.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Snow showers likely. Lows in the mid 20s.
Southwest winds around 10 mph.
.SATURDAY...Partly cloudy. Chance of snow showers. Lows in the
lower 20s. Highs in the mid 30s. West winds around 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with slight chance of snow
showers. Lows 27 to 32. Highs 38 to 43. West winds around 15 mph.
.TUESDAY THROUGH WEDNESDAY...Mostly cloudy with chance of showers
and snow showers. Lows in the lower 30s. Highs 44 to 49.
$$
WYZ287-042300-
Owl Creek Mountains-
501 AM MST Thu Dec 4 2025
.TODAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....29-34.
24 hr trend......4 degrees warmer.
Min humidity........42-48 percent.
24 hr trend......16 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
around 10 mph. Gusts up to 15 mph.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......400-2400 ft agl.
Smoke dispersal.....Poor.
.TONIGHT...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
Chance of thunder...0 percent.
Min temperature.....18-23.
24 hr trend......2 degrees warmer.
Max humidity........65-71 percent.
24 hr trend......18 percent drier.
Humidity recovery...Good.
20-foot winds.......Downslope/downvalley 4-7 mph.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......200-600 ft agl.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Partly cloudy. Chance of snow showers late in
the afternoon. Chance of snow 50 percent.
Chance of thunder...0 percent.
Max temperature.....29-34.
24 hr trend......1 degree cooler.
Min humidity........55-61 percent.
24 hr trend......11 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then south
around 10 mph. Gusts up to 15 mph.
Ridge top winds.....West 10 to 15 mph until 1000, then south.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph until 1300, then
southwest.
Mixing Height.......200-2000 ft agl.
Smoke dispersal.....Poor.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Mostly cloudy with chance of snow showers. Lows
in the mid 20s. West winds around 10 mph.
.SATURDAY...Partly cloudy with slight chance of snow showers.
Lows in the lower 20s. Highs in the mid 30s. West winds around
10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy. Lows 25 to 30. Highs
36 to 41. West winds around 10 mph.
.TUESDAY...Mostly cloudy. Chance of showers and snow showers.
Lows in the lower 30s. Highs in the upper 40s.
.WEDNESDAY...Partly cloudy with chance of snow showers and
showers. Highs in the mid 40s.
$$
WYZ286-042300-
Absaroka Mountains/North Shoshone NF-
Including the city of Pahaska
501 AM MST Thu Dec 4 2025
...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO
2 PM MST SATURDAY...
.TODAY...
Sky/weather.........Partly cloudy then becoming mostly cloudy.
Chance of snow showers in the afternoon. Chance
of snow 50 percent.
Chance of thunder...0 percent.
Max temperature.....23-28.
24 hr trend......Unchanged.
Min humidity........56-62 percent.
24 hr trend......10 percent wetter.
20-foot winds.......West winds around 20 mph. Gusts up to 30 mph
until 1200, then 35 mph.
Ridge top winds.....West 25 to 30 mph.
Chc of wetting rain.Less than 5 percent.
Transport winds.....West 25 to 30 mph.
Mixing Height.......600-2600 ft agl.
Smoke dispersal.....Poor to fair.
.TONIGHT...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
Chance of snow showers. Snow showers likely
early in the morning. Snow accumulation up to 6
inches. Chance of snow 70 percent.
Chance of thunder...0 percent.
Min temperature.....14-19.
24 hr trend......4 degrees warmer.
Max humidity........75-81 percent.
24 hr trend......Unchanged.
Humidity recovery...Excellent.
20-foot winds.......West winds 15 to 20 mph. Gusts up to 30 mph
until 2400, then 20 mph.
Ridge top winds.....West 20 to 25 mph.
Chc of wetting rain.15 percent until 2400, then 25 percent.
Transport winds.....West 20 to 25 mph.
Mixing Height.......400-1600 ft agl.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Partly cloudy then becoming mostly cloudy. Snow
showers likely, then snow showers late in the
afternoon. Snow accumulation up to 4 inches.
Chance of snow near 100 percent.
Chance of thunder...0 percent.
Max temperature.....26-31.
24 hr trend......3 degrees warmer.
Min humidity........67-73 percent.
24 hr trend......7 percent wetter.
20-foot winds.......West winds around 15 mph with gusts to around
30 mph.
Ridge top winds.....West around 20 mph.
Chc of wetting rain.15 percent until 1200, then 35 percent.
Transport winds.....West 20 to 25 mph.
Mixing Height.......1400-3400 ft agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Snow showers. Lows in the lower 20s. West winds
around 20 mph.
.SATURDAY...Snow showers. Lows around 18. Highs in the upper 20s.
West winds around 15 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with chance of snow
showers. Lows 21 to 26. Highs 27 to 32. West winds around 20 mph.
.TUESDAY THROUGH WEDNESDAY...Snow showers likely. Lows in the
upper 20s. Highs in the upper 30s.
$$
WYZ140-042300-
Yellowstone National Park-
Including the cities of Lake, Mammoth, and Old Faithful
501 AM MST Thu Dec 4 2025
...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO
2 PM MST SATURDAY...
.TODAY...
Sky/weather.........Mostly cloudy. Chance of snow showers in the
morning, then snow showers in the afternoon.
Snow accumulation of 1 to 4 inches. Chance of
snow near 100 percent.
Chance of thunder...0 percent.
Max temperature.....22-27.
24 hr trend......5 degrees cooler.
Min humidity........71-77 percent.
24 hr trend......20 percent wetter.
20-foot winds.......Southwest winds 10 to 15 mph with higher gusts.
Ridge top winds.....Southwest 15 to 20 mph.
Chc of wetting rain.5 percent until 1200, then 35 percent.
Transport winds.....Southwest 15 to 20 mph until 1300, then 20 to
25 mph.
Mixing Height.......400-2200 ft agl.
Smoke dispersal.....Poor to fair.
.TONIGHT...
Sky/weather.........Cloudy. Snow showers. Snow accumulation of 1 to
9 inches. Chance of snow near 100 percent.
Chance of thunder...0 percent.
Min temperature.....15-20.
24 hr trend......4 degrees warmer.
Max humidity........85-91 percent.
24 hr trend......1 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Southwest winds 10 to 15 mph and gusty.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.67 percent.
Transport winds.....Southwest 15 to 20 mph.
Mixing Height.......400-1600 ft agl.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Mostly cloudy. Snow showers. Snow accumulation
of 1 to 6 inches. Chance of snow near 100
percent.
Chance of thunder...0 percent.
Max temperature.....27-32.
24 hr trend......6 degrees warmer.
Min humidity........75-81 percent.
24 hr trend......3 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
southwest around 10 mph with gusts to around 25
mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.35 percent until 1200, then 80 percent.
Transport winds.....West 15 to 20 mph until 1700, then southwest
around 25 mph.
Mixing Height.......600-2400 ft agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Snow showers. Lows around 20. West winds around
15 mph.
.SATURDAY...Snow showers. Lows around 15. Highs in the upper 20s.
West winds around 10 mph.
.SUNDAY THROUGH MONDAY...Cloudy with chance of snow showers. Lows
20 to 25. Highs 25 to 30. Southwest winds around 10 mph.
.TUESDAY THROUGH WEDNESDAY...Snow showers likely. Lows in the mid
20s. Highs 32 to 37.
$$
WYZ415-042300-
North Zone Bridger Teton NF and Grand Teton NP-
Including the cities of Jackson and Moran
501 AM MST Thu Dec 4 2025
...WINTER STORM WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO
2 PM MST SATURDAY...
.TODAY...
Sky/weather.........Partly cloudy then becoming mostly cloudy.
Slight chance of snow showers in the morning,
then snow showers in the afternoon. Snow
accumulation up to 2 inches. Chance of snow 90
percent.
Chance of thunder...0 percent.
Max temperature.....20-25.
24 hr trend......3 degrees cooler.
Min humidity........69-75 percent.
24 hr trend......22 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then west
around 10 mph. Gusts up to 15 mph.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.Zero percent until 1200, then 10 percent.
Transport winds.....West 10 to 15 mph until 1300, then 15 to 20
mph.
Mixing Height.......600-2600 ft agl.
Smoke dispersal.....Poor.
.TONIGHT...
Sky/weather.........Mostly cloudy. Snow showers likely early in the
evening, then snow showers early in the
evening. Snow accumulation of 1 to 7 inches.
Chance of snow near 100 percent.
Chance of thunder...0 percent.
Min temperature.....13-18.
24 hr trend......6 degrees warmer.
Max humidity........88-94 percent.
24 hr trend......1 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Southwest winds around 10 mph until 0300, then
downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.55 percent until 2400, then 70 percent.
Transport winds.....Southwest around 15 mph.
Mixing Height.......600-1400 ft agl.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Mostly cloudy. Snow showers. Snow accumulation
of 2 to 7 inches. Chance of snow near 100
percent.
Chance of thunder...0 percent.
Max temperature.....26-31.
24 hr trend......6 degrees warmer.
Min humidity........80-86 percent.
24 hr trend......4 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.60 percent until 1200, then 90 percent.
Transport winds.....West 15 to 20 mph.
Mixing Height.......600-2600 ft agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Snow showers. Lows in the lower 20s. West winds
around 15 mph.
.SATURDAY...Snow showers. Lows around 15. Highs in the upper 20s.
West winds around 10 mph.
.SUNDAY...Snow showers. Lows in the lower 20s. Highs in the mid
20s. Southwest winds around 10 mph.
.MONDAY...Snow showers likely. Lows in the mid 20s. Highs around
30. Southwest winds around 10 mph.
.TUESDAY...Snow showers and showers likely. Lows in the upper
20s. Highs in the mid 30s.
.WEDNESDAY...Snow showers likely in the morning, then snow
showers with showers likely in the afternoon. Highs in the mid
30s.
$$
WYZ416-042300-
West Wind River Mountains/East Zone Bridger Teton NF-
501 AM MST Thu Dec 4 2025
...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO
2 PM MST SATURDAY...
.TODAY...
Sky/weather.........Partly cloudy. Slight chance of snow showers
early in the afternoon. Chance of snow showers
late in the afternoon, then slight chance of
snow showers late in the afternoon. Chance of
snow 50 percent.
Chance of thunder...0 percent.
Max temperature.....19-24.
24 hr trend......2 degrees cooler.
Min humidity........64-70 percent.
24 hr trend......15 percent wetter.
20-foot winds.......West winds 10 to 15 mph. Gusts up to 20 mph
until 1200, then 25 mph.
Ridge top winds.....West 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 15 to 20 mph.
Mixing Height.......400-2400 ft agl.
Smoke dispersal.....Poor.
.TONIGHT...
Sky/weather.........Mostly cloudy. Snow showers likely. Snow
accumulation up to 2 inches. Chance of snow 70
percent.
Chance of thunder...0 percent.
Min temperature.....10-15.
24 hr trend......7 degrees warmer.
Max humidity........87-93 percent.
24 hr trend......2 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......West winds around 10 mph with gusts to around
15 mph.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.5 percent until 2400, then 15 percent.
Transport winds.....West around 15 mph.
Mixing Height.......400-1200 ft agl.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Partly cloudy then becoming mostly cloudy.
Chance of snow showers in the morning, then
snow showers late in the morning. Snow
accumulation of 1 to 3 inches. Chance of snow
near 100 percent.
Chance of thunder...0 percent.
Max temperature.....24-29.
24 hr trend......4 degrees warmer.
Min humidity........72-78 percent.
24 hr trend......9 percent wetter.
20-foot winds.......West winds 10 to 15 mph. Gusts up to 20 mph
until 1200, then 25 mph.
Ridge top winds.....West 15 to 20 mph.
Chc of wetting rain.5 percent until 1200, then 40 percent.
Transport winds.....West 15 to 20 mph until 1400, then 20 to 25
mph.
Mixing Height.......800-2800 ft agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Snow showers. Lows around 19. West winds around
15 mph.
.SATURDAY...Snow showers. Lows around 11. Highs in the mid 20s.
West winds around 15 mph.
.SUNDAY THROUGH MONDAY...Mostly cloudy with chance of snow
showers. Lows 15 to 20. Highs 23 to 28. West winds 10 to 15 mph.
.TUESDAY...Mostly cloudy with chance of snow showers. Lows in the
mid 20s. Highs in the lower 30s.
.WEDNESDAY...Chance of snow showers in the morning, then snow
showers likely in the afternoon. Highs in the mid 30s.
$$
WYZ288-042300-
East Wind River Mountains/South Shoshone NF-
Including the cities of Dubois and South Pass
501 AM MST Thu Dec 4 2025
.TODAY...
Sky/weather.........Partly cloudy. Chance of snow showers late in
the afternoon. Chance of snow 50 percent.
Chance of thunder...0 percent.
Max temperature.....24-29.
24 hr trend......4 degrees warmer.
Min humidity........59-65 percent.
24 hr trend......5 percent drier.
20-foot winds.......West winds 15 to 20 mph with gusts to around 30
mph.
Ridge top winds.....West 20 to 25 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 20 to 25 mph until 1300, then 25 to 30
mph.
Mixing Height.......400-2200 ft agl.
Smoke dispersal.....Poor.
.TONIGHT...
Sky/weather.........Partly cloudy then becoming mostly cloudy then
becoming partly cloudy. Chance of snow showers.
Chance of snow 50 percent.
Chance of thunder...0 percent.
Min temperature.....13-18.
24 hr trend......5 degrees warmer.
Max humidity........76-82 percent.
24 hr trend......10 percent drier.
Humidity recovery...Excellent.
20-foot winds.......West winds 15 to 20 mph with gusts to around 30
mph.
Ridge top winds.....West 20 to 25 mph.
Chc of wetting rain.5 percent.
Transport winds.....West around 25 mph.
Mixing Height.......400-1000 ft agl.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Partly cloudy then becoming mostly cloudy.
Chance of snow showers. Snow showers late in
the afternoon. Snow accumulation up to 3
inches. Chance of snow near 100 percent.
Chance of thunder...0 percent.
Max temperature.....26-31.
24 hr trend......2 degrees warmer.
Min humidity........64-70 percent.
24 hr trend......8 percent wetter.
20-foot winds.......West winds 15 to 20 mph. Gusts up to 30 mph
until 1500, then 35 mph.
Ridge top winds.....West 20 to 25 mph.
Chc of wetting rain.5 percent until 1200, then 15 percent.
Transport winds.....West 20 to 25 mph until 1400, then 25 to 30
mph.
Mixing Height.......1000-3000 ft agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Snow showers in the evening, then snow showers
likely after midnight. Lows in the lower 20s. West winds around
20 mph.
.SATURDAY THROUGH MONDAY...Partly cloudy with chance of snow
showers. Lows 18 to 23. Highs 27 to 32. West winds 15 to 20 mph.
.TUESDAY...Mostly cloudy with chance of snow showers and showers.
Lows around 30. Highs in the upper 30s.
.WEDNESDAY...Partly cloudy. Chance of snow showers in the
morning, then chance of snow showers and showers in the
afternoon. Highs in the upper 30s.
$$
WYZ414-042300-
Salt and Wyoming Ranges/West Zone Bridger Teton NF-
Including the city of Afton
501 AM MST Thu Dec 4 2025
...WINTER STORM WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO
2 PM MST SATURDAY...
.TODAY...
Sky/weather.........Partly cloudy then becoming mostly cloudy.
Slight chance of snow showers early in the
morning. Slight chance of snow showers late in
the morning, then chance of snow showers in the
afternoon. Chance of snow 50 percent.
Chance of thunder...0 percent.
Max temperature.....19-24.
24 hr trend......3 degrees cooler.
Min humidity........67-73 percent.
24 hr trend......7 percent wetter.
20-foot winds.......West winds 10 to 15 mph. Gusts up to 15 mph
until 1200, then 20 mph.
Ridge top winds.....West 10 to 15 mph until 1300, then 15 to 20
mph.
Chc of wetting rain.Less than 5 percent.
Transport winds.....West 15 to 20 mph.
Mixing Height.......600-2600 ft agl.
Smoke dispersal.....Poor.
.TONIGHT...
Sky/weather.........Mostly cloudy. Chance of snow showers early in
the evening, then snow showers likely early in
the evening. Snow showers early in the evening.
Snow accumulation of 1 to 8 inches. Chance of
snow near 100 percent.
Chance of thunder...0 percent.
Min temperature.....14-19.
24 hr trend......6 degrees warmer.
Max humidity........89-95 percent.
24 hr trend......3 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Southwest winds around 10 mph with gusts to
around 15 mph.
Ridge top winds.....Southwest around 15 mph.
Chc of wetting rain.50 percent until 2400, then 75 percent.
Transport winds.....West 15 to 20 mph.
Mixing Height.......400-1400 ft agl.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Mostly cloudy. Snow showers. Snow accumulation
of 2 to 9 inches. Chance of snow near 100
percent.
Chance of thunder...0 percent.
Max temperature.....27-32.
24 hr trend......7 degrees warmer.
Min humidity........79-85 percent.
24 hr trend......7 percent wetter.
20-foot winds.......West winds 10 to 15 mph. Gusts up to 20 mph
until 1200, then 25 mph.
Ridge top winds.....West 15 to 20 mph.
Chc of wetting rain.55 percent until 1200, then 90 percent.
Transport winds.....West 15 to 20 mph.
Mixing Height.......600-2200 ft agl.
Smoke dispersal.....Poor.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Snow showers. Lows in the mid 20s. West winds
around 20 mph.
.SATURDAY...Snow showers. Lows around 18. Highs in the upper 20s.
West winds around 15 mph.
.SUNDAY THROUGH MONDAY...Snow showers likely. Lows 20 to 25.
Highs 27 to 32. West winds around 10 mph.
.TUESDAY THROUGH WEDNESDAY...Snow showers and showers likely.
Lows in the upper 20s. Highs 34 to 39.
$$
WYZ278-042300-
Upper Green River Basin/Rock Springs BLM-
Including the cities of Big Piney, Farson, and Pinedale
501 AM MST Thu Dec 4 2025
.TODAY...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....24-29.
24 hr trend......Unchanged.
Min humidity........57-63 percent.
24 hr trend......3 percent drier.
20-foot winds.......Northwest winds 10 to 15 mph. Gusts up to 20
mph until 1200, then 25 mph.
Ridge top winds.....Northwest 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 15 to 20 mph until 1200, then west 20
to 25 mph.
Mixing Height.......400-2200 ft agl until 1200, then 1800-3200 ft
agl until 1700, then 1000-1200 ft agl.
Smoke dispersal.....Poor to fair.
.TONIGHT...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
Slight chance of snow showers early in the
evening. Chance of snow showers in the late
evening and overnight. Chance of snow 50
percent.
Chance of thunder...0 percent.
Min temperature.....13-18.
24 hr trend......5 degrees warmer.
Max humidity........86-92 percent.
24 hr trend......4 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......West winds 10 to 15 mph and gusty.
Ridge top winds.....West 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 15 to 20 mph.
Mixing Height.......400-1000 ft agl.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Partly cloudy then becoming mostly cloudy.
Chance of snow showers, then snow showers
likely late in the afternoon. Snow accumulation
up to 2 inches. Chance of snow 70 percent.
Chance of thunder...0 percent.
Max temperature.....29-34.
24 hr trend......5 degrees warmer.
Min humidity........67-73 percent.
24 hr trend......10 percent wetter.
20-foot winds.......West winds 10 to 15 mph. Gusts up to 20 mph
until 1200, then 25 mph.
Ridge top winds.....West 15 to 20 mph until 1700, then southwest.
Chc of wetting rain.Zero percent until 1200, then 10 percent.
Transport winds.....West 15 to 20 mph until 1400, then 20 to 25
mph.
Mixing Height.......800-2800 ft agl.
Smoke dispersal.....Poor.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Snow showers likely. Lows in the lower 20s. West
winds around 15 mph.
.SATURDAY THROUGH SUNDAY...Partly cloudy with chance of snow
showers. Lows 13 to 18. Highs 31 to 36. West winds 10 to 15 mph.
.MONDAY...Mostly cloudy. Chance of snow showers. Lows around 20.
Highs in the upper 30s. West winds around 10 mph.
.TUESDAY...Mostly cloudy with slight chance of showers and snow
showers. Lows in the upper 20s. Highs in the lower 40s.
.WEDNESDAY...Mostly cloudy with chance of snow showers and slight
chance of showers. Highs in the mid 40s.
$$
WYZ277-042300-
Lincoln and Uinta Counties/Lower Elevations-
Including the cities of Evanston, Fort Bridger, and Kemmerer
501 AM MST Thu Dec 4 2025
...WINTER STORM WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO
2 PM MST SATURDAY...
.TODAY...
Sky/weather.........Partly cloudy. Slight chance of snow showers in
the afternoon. Chance of snow 20 percent.
Chance of thunder...0 percent.
Max temperature.....23-28.
24 hr trend......Unchanged.
Min humidity........69-75 percent.
24 hr trend......2 percent drier.
20-foot winds.......West winds 10 to 15 mph with higher gusts until
1200, then 15 to 20 mph with gusts to around 30
mph.
Ridge top winds.....West 15 to 20 mph until 1200, then 20 to 25
mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 15 to 20 mph until 1100, then 20 to 25
mph.
Mixing Height.......800-2800 ft agl.
Smoke dispersal.....Poor to fair.
.TONIGHT...
Sky/weather.........Mostly cloudy. Slight chance of snow showers
early in the evening. Chance of snow showers
early in the evening. Chance of snow 50
percent.
Chance of thunder...0 percent.
Min temperature.....17-22.
24 hr trend......6 degrees warmer.
Max humidity........87-93 percent.
24 hr trend......3 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......West winds around 15 mph and gusty.
Ridge top winds.....West 15 to 20 mph.
Chc of wetting rain.5 percent until 2400, then 15 percent.
Transport winds.....West around 20 mph.
Mixing Height.......400-1200 ft agl.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Partly cloudy then becoming mostly cloudy.
Chance of snow showers. Snow showers late in
the afternoon. Snow accumulation up to 3
inches. Chance of snow near 100 percent.
Chance of thunder...0 percent.
Max temperature.....30-35.
24 hr trend......6 degrees warmer.
Min humidity........78-84 percent.
24 hr trend......12 percent wetter.
20-foot winds.......West winds 15 to 20 mph. Gusts up to 25 mph
until 1200, then 30 mph.
Ridge top winds.....West 15 to 20 mph until 1200, then around 25
mph.
Chc of wetting rain.5 percent until 1200, then 25 percent.
Transport winds.....West 20 to 25 mph.
Mixing Height.......400-2400 ft agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Snow showers. Lows in the mid 20s. West winds
around 20 mph.
.SATURDAY...Mostly cloudy with chance of snow showers. Lows
around 19. Highs in the lower 30s. West winds around 15 mph.
.SUNDAY...Mostly cloudy with slight chance of snow showers. Lows
in the lower 20s. Highs in the lower 30s. West winds around
10 mph.
.MONDAY...Mostly cloudy with chance of snow showers. Lows in the
lower 20s. Highs in the mid 30s. West winds around 10 mph.
.TUESDAY...Mostly cloudy with chance of snow showers and slight
chance of showers. Lows around 30. Highs in the upper 30s.
.WEDNESDAY...Mostly cloudy with chance of snow showers and
showers. Highs in the lower 40s.
$$
WYZ279-042300-
Sweetwater County/Rock Springs BLM/Flaming Gorge NRA-
Including the cities of Green River, Rock Springs, and Wamsutter
501 AM MST Thu Dec 4 2025
.TODAY...
Sky/weather.........Partly cloudy then becoming mostly sunny then
becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....26-31.
24 hr trend......2 degrees warmer.
Min humidity........61-67 percent.
24 hr trend......1 percent drier.
20-foot winds.......West winds 15 to 20 mph. Gusts up to 20 mph
until 0900, then 35 mph.
Ridge top winds.....West 20 to 25 mph until 1300, then 25 to 30
mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 20 to 25 mph until 1200, then 25 to 30
mph.
Mixing Height.......400-2400 ft agl until 1200, then 1200-3200 ft
agl.
Smoke dispersal.....Poor to fair.
.TONIGHT...
Sky/weather.........Mostly cloudy. Slight chance of snow showers
late in the evening. Chance of snow showers
after midnight, then slight chance of snow
showers early in the morning. Chance of snow 50
percent.
Chance of thunder...0 percent.
Min temperature.....19-24.
24 hr trend......8 degrees warmer.
Max humidity........85-91 percent.
24 hr trend......2 percent wetter.
Humidity recovery...Excellent.
20-foot winds.......West winds 15 to 20 mph with gusts to around 30
mph.
Ridge top winds.....West 20 to 25 mph.
Chc of wetting rain.Zero percent until 2400, then 10 percent.
Transport winds.....West around 25 mph.
Mixing Height.......600-1200 ft agl.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Mostly cloudy then becoming partly cloudy then
becoming mostly cloudy. Slight chance of snow
showers, then chance of snow showers late in
the afternoon. Chance of snow 50 percent.
Chance of thunder...0 percent.
Max temperature.....30-35.
24 hr trend......4 degrees warmer.
Min humidity........73-79 percent.
24 hr trend......15 percent wetter.
20-foot winds.......West winds 15 to 20 mph with gusts to around 30
mph.
Ridge top winds.....West 20 to 25 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 20 to 25 mph until 1300, then 25 to 30
mph.
Mixing Height.......1000-3000 ft agl.
Smoke dispersal.....Poor to fair.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Mostly cloudy with chance of snow showers. Lows
in the mid 20s. West winds around 20 mph.
.SATURDAY...Partly cloudy with slight chance of snow showers.
Lows around 20. Highs in the mid 30s. West winds around 20 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy. Lows 21 to 26. Highs
33 to 38. West winds around 15 mph.
.TUESDAY THROUGH WEDNESDAY...Mostly cloudy with slight chance of
showers and snow showers. Lows in the lower 30s. Highs 42 to 47.
$$
WYZ289-042300-
Granite/Green/Ferris/Rattlesnake Mountains-
Including the city of Jeffrey City
501 AM MST Thu Dec 4 2025
.TODAY...
Sky/weather.........Partly cloudy then becoming mostly sunny then
becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....27-32.
24 hr trend......4 degrees warmer.
Min humidity........54-60 percent.
24 hr trend......11 percent drier.
20-foot winds.......West winds around 20 mph with gusts to around
30 mph.
Ridge top winds.....West 20 to 25 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 20 to 25 mph until 1400, then 25 to 30
mph.
Mixing Height.......400-2400 ft agl.
Smoke dispersal.....Poor to fair.
.TONIGHT...
Sky/weather.........Partly cloudy then becoming mostly cloudy.
Slight chance of snow showers early in the
morning. Chance of snow 20 percent.
Chance of thunder...0 percent.
Min temperature.....18-23.
24 hr trend......6 degrees warmer.
Max humidity........80-86 percent.
24 hr trend......5 percent drier.
Humidity recovery...Excellent.
20-foot winds.......West winds 15 to 20 mph with gusts to around 30
mph.
Ridge top winds.....West 20 to 25 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 25 to 30 mph until 0500, then around 20
mph.
Mixing Height.......400-1000 ft agl.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Partly cloudy. Slight chance of snow showers,
then chance of snow showers late in the
afternoon. Chance of snow 50 percent.
Chance of thunder...0 percent.
Max temperature.....30-35.
24 hr trend......2 degrees warmer.
Min humidity........66-72 percent.
24 hr trend......9 percent wetter.
20-foot winds.......Southwest winds 15 to 20 mph with gusts to
around 30 mph.
Ridge top winds.....Southwest 20 to 25 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 20 to 25 mph.
Mixing Height.......600-2600 ft agl.
Smoke dispersal.....Poor.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Mostly cloudy with chance of snow showers. Lows
in the mid 20s. Southwest winds around 20 mph.
.SATURDAY...Partly cloudy with chance of snow showers. Lows
around 18. Highs in the mid 30s. West winds around 15 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy. Lows 22 to 27. Highs
33 to 38. Southwest winds 15 to 20 mph.
.TUESDAY...Mostly cloudy with slight chance of showers and snow
showers. Lows in the lower 30s. Highs in the lower 40s.
.WEDNESDAY...Partly cloudy with slight chance of showers and snow
showers. Highs in the mid 40s.
$$
WYZ300-042300-
Casper Mountain-
501 AM MST Thu Dec 4 2025
.TODAY...
Sky/weather.........Partly cloudy then becoming mostly sunny then
becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....27-32.
24 hr trend......5 degrees warmer.
Min humidity........60-66 percent.
24 hr trend......15 percent drier.
20-foot winds.......Southwest winds 15 to 20 mph with gusts to
around 30 mph.
Ridge top winds.....Southwest 20 to 25 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest 20 to 25 mph until 1400, then west 25
to 30 mph.
Mixing Height.......600-2600 ft agl until 1700, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.TONIGHT...
Sky/weather.........Partly cloudy then becoming mostly cloudy.
Slight chance of snow showers after midnight.
Chance of snow showers after midnight, then
slight chance of snow showers early in the
morning. Chance of snow 40 percent.
Chance of thunder...0 percent.
Min temperature.....18-23.
24 hr trend......9 degrees warmer.
Max humidity........80-86 percent.
24 hr trend......6 percent drier.
Humidity recovery...Excellent.
20-foot winds.......Southwest winds 15 to 20 mph with gusts to
around 25 mph.
Ridge top winds.....Southwest 20 to 25 mph.
Chc of wetting rain.Zero percent until 2400, then 10 percent.
Transport winds.....Southwest 25 to 30 mph.
Mixing Height.......200-1000 ft agl.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
Slight chance of snow showers in the morning.
Chance of snow showers late in the afternoon.
Chance of snow 50 percent.
Chance of thunder...0 percent.
Max temperature.....27-32.
24 hr trend......2 degrees warmer.
Min humidity........69-75 percent.
24 hr trend......10 percent wetter.
20-foot winds.......Southwest winds around 15 mph with gusts to
around 25 mph.
Ridge top winds.....Southwest 15 to 20 mph.
Chc of wetting rain.Less than 5 percent.
Transport winds.....West around 20 mph.
Mixing Height.......600-2600 ft agl until 1700, then 200-600 ft
agl.
Smoke dispersal.....Poor.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Chance of snow showers in the evening, then snow
showers likely after midnight. Lows in the lower 20s. Southwest
winds around 20 mph.
.SATURDAY...Mostly cloudy with chance of snow showers. Lows
around 17. Highs in the lower 30s. West winds around 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy. Lows 21 to 26. Highs
30 to 35. Southwest winds around 15 mph.
.TUESDAY THROUGH WEDNESDAY...Mostly cloudy with chance of snow
showers and showers. Lows in the upper 20s. Highs around 40.
$$