Winter Storm Warnings
December 18 2025
* WHAT...Heavy snow expected. Total snow accumulations of 8 to 16
inches with amounts of 18 to 24 inches in the highest elevations.
Winds gusting as high as 60 mph.
* WHERE...Salt River and Wyoming Ranges.
* WHEN...From 11 AM this morning to 5 AM MST Saturday.
* IMPACTS...Travel could be very difficult including over Salt River
Pass. Blowing snow could significantly reduce visibility.
Backcountry travel is not advised.
* WHAT...Total snow accumulations of 10 to 20 inches with the
highest elevations seeing 2 to 3 feet with localized areas greater
than 3 feet. Winds gusting as high as 55 mph at times.
* WHERE...Absaroka Mountains and Teton and Gros Ventre Mountains.
* WHEN...From 11 AM this morning to 5 AM MST Saturday.
* IMPACTS...Travel could be very difficult. The hazardous conditions
could impact travel across Teton and Togwotee Passes. Blowing and
drifting of snow is expected. Backcountry travel is not advised.
* WHAT...Snow expected. Total snow accumulations of 2 to 6 inches
around Pinedale and Daniel with higher amounts of 6 to 10 inches
nearby Bondurant. Winds gusting as high as 40 mph at times.
* WHERE...Upper Green River Basin Foothills.
* WHEN...From 11 AM this morning to 5 AM MST Saturday.
* IMPACTS...Travel could be difficult. The hazardous conditions
could impact the Thursday evening and Friday morning as well as
evening commutes.
* ADDITIONAL DETAILS...Temperatures may warm above freezing during
the daytime Friday which would lead to a possible transition over
to a mix of rain/snow or heavy wet snow. Accumulations may be
limited during this time but slick conditions could still be
possible.
* WHAT...Heavy snow expected. Total snow accumulations between 10
and 20 inches, with the highest amounts of 2 to 3 feet in
southwestern Yellowstone. Lower elevations of northern and western
Yellowstone will see 4 to 10 inches of snow with much lower
amounts, less than 4 inches at Mammoth. Winds may be gusting as
high as 55 mph at times.
* WHERE...Yellowstone National Park.
* WHEN...From 11 AM this morning to 5 AM MST Saturday.
* IMPACTS...Travel could be very difficult especially in the
backcountry.
* WHAT...Heavy snow expected. Total snow accumulations of 10 to 20
inches with amounts of 2 to 3 feet in the highest elevations. 4 to
8 inches of snow is expected for South Pass. Winds could gust as
high as 60 to 70 mph with locally stronger gusts possible.
* WHERE...Wind River Mountains East and Wind River Mountains West.
* WHEN...From 11 AM this morning to 5 AM MST Saturday.
* IMPACTS...Travel could be very difficult. Blowing snow could
significantly reduce visibility. The hazardous conditions could
impact travel along South Pass. Backcountry travel is not advised.
* WHAT...Snow expected. Total snow accumulations of 4 to 8 inches
with locally higher amounts of 10 to 14 inches in the higher
elevations and along the foothills. Winds gusting as high as 45
mph at times.
* WHERE...Jackson Hole and Star Valley.
* WHEN...From 11 AM this morning to 5 AM MST Saturday.
* IMPACTS...Travel could be difficult. The hazardous conditions
could impact the Thursday evening and Friday morning as well as
evening commutes.
* ADDITIONAL DETAILS...Temperatures may warm above freezing during
the daytime Friday which would lead to a possible transition over
to a mix of rain/snow or heavy wet snow. Accumulations may be
limited during this time but slick conditions could still be
possible.
...RED FLAG WARNING IN EFFECT THIS MORNING AND AFTERNOON FOR
PORTIONS OF SOUTHEAST WYOMING AND THE SOUTHERN NEBRASKA
PANHANDLE...
...RED FLAG WARNING NOW IN EFFECT ON FRIDAY FOR MUCH OF THE HIGH
PLAINS...
...RED FLAG WARNING IN EFFECT FROM 10 AM TO 11 PM
MST FRIDAY FOR GUSTY WINDS AND LOW HUMIDITY...
The National Weather Service in Cheyenne has issued a Red Flag
Warning, which is in effect from 10 AM to 11 PM MST Friday. The
Fire Weather Watch is no longer in effect.
* AFFECTED AREA...Fire weather zones 430, 431 and 437.
* WIND...For today - Gusts 40 to 60 mph. For tomorrow - Gusts 50
to 70 mph.
* HUMIDITY...For today - RH values of 20 to 25%. For tomorrow -
RH values of 15 to 20%.
* IMPACTS...Any fires that develop will likely spread rapidly.
Outdoor burning is not recommended. Although conditions will be
borderline, a lack of significant precipitation combined with
the high winds in the region will create a critical fire weather
environment.
...RED FLAG WARNING IN EFFECT THIS MORNING AND AFTERNOON FOR
PORTIONS OF SOUTHEAST WYOMING AND THE SOUTHERN NEBRASKA
PANHANDLE...
...RED FLAG WARNING NOW IN EFFECT ON FRIDAY FOR MUCH OF THE HIGH
PLAINS...
The National Weather Service in Cheyenne has issued a Red Flag
Warning, which is in effect from 10 AM to 11 PM MST Friday.
* AFFECTED AREA...Fire weather zones 434, 435, 417, 418.
* WIND...Gusts 40 to 60 mph.
* HUMIDITY...RH values 15 to 30%.
* IMPACTS...Any fires that develop will likely spread rapidly.
Outdoor burning is not recommended. Although conditions will be
borderline, a lack of significant precipitation combined with
the high winds in the region will create a critical fire weather
environment.
...RED FLAG WARNING IN EFFECT THIS MORNING AND AFTERNOON FOR
PORTIONS OF SOUTHEAST WYOMING AND THE SOUTHERN NEBRASKA
PANHANDLE...
...RED FLAG WARNING NOW IN EFFECT ON FRIDAY FOR MUCH OF THE HIGH
PLAINS...
The National Weather Service in Cheyenne has issued a Red Flag
Warning, which is in effect from 10 AM to 11 PM MST Friday. The
Fire Weather Watch is no longer in effect.
* WIND...Gusts 50 to 75 mph.
* HUMIDITY...RH values of 15 to 20%.
* IMPACTS...Any fires that develop will likely spread rapidly.
Outdoor burning is not recommended. Although conditions will be
borderline, a lack of significant precipitation combined with
the high winds in the region will create a critical fire weather
environment.
...RED FLAG WARNING IN EFFECT THIS MORNING AND AFTERNOON FOR
PORTIONS OF SOUTHEAST WYOMING AND THE SOUTHERN NEBRASKA
PANHANDLE...
...RED FLAG WARNING NOW IN EFFECT ON FRIDAY FOR MUCH OF THE HIGH
PLAINS...
...RED FLAG WARNING IN EFFECT FROM 10 AM TO 11 PM
MST FRIDAY FOR GUSTY WINDS AND LOW HUMIDITY...
The National Weather Service in Cheyenne has issued a Red Flag
Warning, which is in effect from 10 AM to 11 PM MST Friday. The
Fire Weather Watch is no longer in effect.
* AFFECTED AREA...Fire weather zones 430, 431 and 437.
* WIND...For today - Gusts 40 to 60 mph. For tomorrow - Gusts 50
to 70 mph.
* HUMIDITY...For today - RH values of 20 to 25%. For tomorrow -
RH values of 15 to 20%.
* IMPACTS...Any fires that develop will likely spread rapidly.
Outdoor burning is not recommended. Although conditions will be
borderline, a lack of significant precipitation combined with
the high winds in the region will create a critical fire weather
environment.
* WHAT...West winds 30 to 50 mph with gusts up to 80 mph expected.
* WHERE...South Laramie Range including the Interstate 80 Summit
between Cheyenne and Laramie, and North Snowy Range Foothills
including Arlington and Elk Mountain along Interstate 80.
* WHEN...From 5 PM this afternoon to 11 AM MST Saturday.
* IMPACTS...Mainly to transportation. Strong cross winds will be
hazardous to light weight or high profile vehicles, including
campers and tractor trailers.
* ADDITIONAL DETAILS...Wildfires will have the potential to spread
rapidly in these conditions.
* WHAT...West winds 35 to 55 mph with gusts up to 95 mph possible.
* WHERE...North Laramie Range.
* WHEN...From 8 PM this evening to 5 AM MST Saturday.
* IMPACTS...Mainly to transportation. Strong cross winds will be
hazardous to light weight or high profile vehicles, including
campers and tractor trailers.
* ADDITIONAL DETAILS...Wildfires will have the potential to spread
rapidly in these conditions.
* WHAT...West winds 35 to 55 mph with gusts up to 90 mph expected.
* WHERE...Bordeaux area along Interstate 25 between Chugwater and
Wheatland, and South Laramie Range Foothills.
* WHEN...From 8 PM this evening to 5 AM MST Saturday.
* IMPACTS...Mainly to transportation. Strong cross winds will be
hazardous to light weight or high profile vehicles, including
campers and tractor trailers.
* ADDITIONAL DETAILS...Wildfires will have the potential to spread
rapidly in these conditions.
* WHAT...West winds 35 to 45 mph with gusts up to 70 mph possible.
* WHERE...Converse County Lower Elevations.
* WHEN...From 11 PM this evening to 5 AM MST Saturday.
* IMPACTS...Mainly to transportation. Strong cross winds will be
hazardous to light weight or high profile vehicles, including
campers and tractor trailers.
* ADDITIONAL DETAILS...Wildfires will have the potential to spread
rapidly in these conditions.
* WHAT...West winds 30 to 40 mph with gusts up to 60 mph expected.
* WHERE...Banner County, Kimball County, Northern Sioux County,
Scotts Bluff County, and Southern Sioux County.
* WHEN...From 11 AM to 11 PM MST Friday.
* IMPACTS...Mainly to transportation. Strong cross winds will be
hazardous to light weight or high profile vehicles, including
campers and tractor trailers.
* ADDITIONAL DETAILS...Wildfires will have the potential to spread
rapidly in these conditions.
* WHAT...West winds 35 to 45 mph with gusts up to 70 mph expected.
* WHERE...Niobrara County, East Laramie County, and Goshen County.
* WHEN...From 5 AM to 11 PM MST Friday.
* IMPACTS...Mainly to transportation. Strong cross winds will be
hazardous to light weight or high profile vehicles, including
campers and tractor trailers.
* ADDITIONAL DETAILS...Wildfires will have the potential to spread
rapidly in these conditions.
* WHAT...West winds 30 to 50 mph with gusts up to 80 mph expected.
* WHERE...Central Laramie County and East Platte County.
* WHEN...From 11 PM this evening to 5 AM MST Saturday.
* IMPACTS...Mainly to transportation. Strong cross winds will be
hazardous to light weight or high profile vehicles, including
campers and tractor trailers.
* ADDITIONAL DETAILS...Wildfires will have the potential to spread
rapidly in these conditions.
* WHAT...Southwest winds 35 to 45 mph with gusts up to 75 mph
expected.
* WHERE...Central Carbon County, Shirley Basin, Upper North Platte
River Basin, and Laramie Valley.
* WHEN...From 8 PM this evening to 5 AM MST Saturday.
* IMPACTS...Mainly to transportation. Strong cross winds will be
hazardous to light weight or high profile vehicles, including
campers and tractor trailers.
* ADDITIONAL DETAILS...Wildfires will have the potential to spread
rapidly in these conditions.
* WHAT...Southwest winds 35 to 45 mph with gusts up to 75 mph
possible.
* WHERE...Ferris/Seminoe/Shirley Mountains.
* WHEN...From 5 PM this afternoon to 11 AM MST Saturday.
* IMPACTS...Mainly to transportation. Strong cross winds will be
hazardous to light weight or high profile vehicles, including
campers and tractor trailers.
* ADDITIONAL DETAILS...Wildfires will have the potential to spread
rapidly in these conditions.
Residents of Wyoming, particularly those in the North Laramie Range, South Laramie Range Foothills, Central Laramie County, Bordeaux area along Interstate 25 between Chugwater and Wheatland, Converse County Lower Elevations, North Snowy Range Foothills, and the Ferris/Seminoe/Shirley Mountains, are advised to brace for potentially destructive high winds. The National Weather Service in Cheyenne has issued a High Wind Watch, warning of west and northwest winds ranging from 30 to 55 mph with gusts up to 95 mph. The impact is expected to be severe on transportation, with strong cross winds posing a hazard to light weight or high profile vehicles, including campers and tractor trailers. Additionally, there is a potential for rapid wildfire spread under these conditions from this evening through late Friday night. Residents and travelers are urged to exercise caution, secure any loose objects, and stay updated on the latest weather conditions.
Avalanche Conditions
Big Horn Ski Resort
Grand Targhee Ski Resort
Hogadon Ski Area
Jackson Hole Mountain Resort
Pine Creek Ski Area
Sleeping Giant Ski Area
Snow King Ski Area
Snowy Range
White Pine Ski Area