High Wind Warning
URGENT - WEATHER MESSAGE
National Weather Service Riverton WY
1254 PM MST Mon Dec 8 2025
WYZ019-020-022-027>030-091300-
/O.CON.KRIW.HW.W.0013.251209T0600Z-251211T1200Z/
Green Mountains and Rattlesnake Range-Natrona County Lower
Elevations-Casper Mountain-South Lincoln County-Rock Springs and
Green River-Flaming Gorge-East Sweetwater County-
Including the cities of Kemmerer, Cokeville, Green River, Casper,
Wamsutter, Rock Springs, and Jeffrey City
1254 PM MST Mon Dec 8 2025
...HIGH WIND WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 5
AM MST THURSDAY...
* WHAT...West winds 30 to 40 mph with gusts up to 65 mph expected.
Localized gusts up to 70 to 75 mph possible.
* WHERE...Casper Mountain, Green Mountains and Rattlesnake Range,
Natrona County Lower Elevations, Sweetwater County and South
Lincoln County. Strongest winds are expected along South Pass and
higher peaks of the Green Mountains and Rattlesnake Range.
* WHEN...From 11 PM this evening to 5 AM MST Thursday.
* IMPACTS...Travel will be difficult, especially for high profile
vehicles.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Use caution if you must drive. Secure loose objects.
&&
$$
For more information from the National Weather Service, visit
https://weather.gov/riw/ .
Hensley
Winter Weather Advisory
URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
121 PM MST Mon Dec 8 2025
WYZ014-015-091300-
/O.UPG.KRIW.WS.A.0010.251209T1200Z-251211T0000Z/
/O.NEW.KRIW.WW.Y.0036.251209T1200Z-251211T0000Z/
Wind River Mountains West-Wind River Mountains East-
121 PM MST Mon Dec 8 2025
...WINTER WEATHER ADVISORY IN EFFECT FROM 5 AM TUESDAY TO 5 PM MST
WEDNESDAY...
* WHAT...Heavy snow possible. Total snow accumulations of 8 to 16
inches possible. Less than 2 inches of snow is expected for South
Pass. Winds could gust as high as 60 to 70 mph. Locally stronger
gusts are possible.
* WHERE...Wind River Mountains.
* WHEN...From 5 AM Tuesday to 5 PM MST Wednesday.
* IMPACTS...Travel could be very difficult. Backcountry travel is
not advised.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Slow down and use caution while traveling.
For graphical depictions of the snowfall forecast, including the
official NWS forecast, high end amounts, and low end amounts, visit
https://weather.gov/riw/winter .
For winter road conditions from the Wyoming Department of
Transportation, visit https://wyoroad.info .
&&
$$
URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
121 PM MST Mon Dec 8 2025
WYZ024-091300-
/O.UPG.KRIW.WS.A.0010.251209T1200Z-251211T0000Z/
/O.NEW.KRIW.WW.Y.0036.251209T1200Z-251211T0000Z/
Salt River and Wyoming Ranges-
121 PM MST Mon Dec 8 2025
...WINTER WEATHER ADVISORY IN EFFECT FROM 5 AM TUESDAY TO 5 PM MST
WEDNESDAY...
* WHAT...Snow expected. Total snow accumulations of 6 to 12 inches.
Winds gusting as high as 60 mph.
* WHERE...Salt River and Wyoming Ranges.
* WHEN...From 5 AM Tuesday to 5 PM MST Wednesday.
* IMPACTS...Travel could be very difficult including over Salt River
Pass. Backcountry travel is not advised.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Slow down and use caution while traveling.
For graphical depictions of the snowfall forecast, including the
official NWS forecast, high end amounts, and low end amounts, visit
https://weather.gov/riw/winter .
For winter road conditions from the Wyoming Department of
Transportation, visit https://wyoroad.info .
&&
$$
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Grand Junction CO
438 AM MST Mon Dec 8 2025
COZ001>014-017>023-UTZ022>025-027>029-091145-
Lower Yampa River Basin-Central Yampa River Basin-
Roan and Tavaputs Plateaus-Elkhead and Park Mountains-
Upper Yampa River Basin-Grand Valley-Debeque to Silt Corridor-
Central Colorado River Basin-Grand and Battlement Mesas-
Gore and Elk Mountains/Central Mountain Valleys-
Central Gunnison and Uncompahgre River Basin-
West Elk and Sawatch Mountains-Flat Tops-Upper Gunnison River Valley-
Uncompahgre Plateau and Dallas Divide-Northwest San Juan Mountains-
Southwest San Juan Mountains-Paradox Valley/Lower Dolores River-
Four Corners/Upper Dolores River-Animas River Basin-
San Juan River Basin-Southeast Utah-Eastern Uinta Mountains-
Eastern Uinta Basin-Tavaputs Plateau-Arches/Grand Flat-
La Sal and Abajo Mountains-Canyonlands/Natural Bridges-
438 AM MST Mon Dec 8 2025
This Hazardous Weather Outlook is for northwest Colorado, southwest
Colorado, west central Colorado, east central Utah, northeast Utah
and southeast Utah.
.DAY ONE...Today and tonight.
Light snow accumulations are possible over the northern and central
mountains. Winter driving conditions over the mountain can be
expected during the morning hours with improvement this afternoon as
the snow tapers off.
.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.
The northern and portions of the central Colorado mountains are
likely to see additional periods of light snow showers through the
week as moisture continues to brush the Central Rockies. Be prepared
for impacts to travel over the Rabbit Ears and Vail Passes at times.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected at this time.
$$
Hazardous Weather Outlook
National Weather Service Riverton WY
315 AM MST Mon Dec 8 2025
WYZ001>020-022>030-091400-
Yellowstone National Park-Absaroka Mountains-Cody Foothills-
North Bighorn Basin-Southwest Bighorn Basin-
Southeast Bighorn Basin-Owl Creek and Bridger Mountains-
Bighorn Mountains West-Bighorn Mountains Southeast-
Northeast Johnson County-Southeast Johnson County-
Teton and Gros Ventre Mountains-Jackson Hole-
Wind River Mountains West-Wind River Mountains East-
Upper Wind River Basin-Wind River Basin-Lander Foothills-
Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Casper Mountain-Star Valley-
Salt River and Wyoming Ranges-Upper Green River Basin Foothills-
Upper Green River Basin-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
315 AM MST Mon Dec 8 2025
...Winter Storm Watches and Warnings in effect for most of the
western mountains tonight through Wednesday...
...High Wind Warning in effect across southern Wyoming and Natrona
County from late tonight through Wednesday night...
This Hazardous Weather Outlook is for Western and Central Wyoming.
.DAY ONE...Today and Tonight.
Mainly light snow in the mountains. Heavier snow moving back into
the northern mountains tonight. Please see Winter Weather Products
and forecasts for details.
Strong to high wind developing from Kemmerer through Rock Springs
and into Natrona County. Please see High Wind Warnings for
details.
.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.
Tuesday and Wednesday...Snow likely in the western and northern
mountains. Strong to high wind continuing in southern Wyoming.
Thursday night and Friday...Another chance for snow in the
northern mountains.
.SPOTTER INFORMATION STATEMENT...
Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.
$$
