High Wind Warning
URGENT - WEATHER MESSAGE
National Weather Service Riverton WY
1211 PM MST Wed Dec 10 2025
WYZ019-020-022-028>030-111200-
/O.CON.KRIW.HW.W.0013.000000T0000Z-251211T1200Z/
Green Mountains and Rattlesnake Range-Natrona County Lower
Elevations-Casper Mountain-Rock Springs and Green River-Flaming
Gorge-East Sweetwater County-
Including the cities of Casper, Rock Springs, Jeffrey City,
Wamsutter, and Green River
1211 PM MST Wed Dec 10 2025
...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 AM MST THURSDAY...
* WHAT...Southwest winds 25 to 35 mph with gusts up to 55 mph. Brief
isolated gusts of 60 mph or more cannot be ruled out at times
especially in wind prone locations.
* WHERE...Casper Mountain, Green Mountains and Rattlesnake Range,
Natrona County Lower Elevations, East Sweetwater County, Flaming
Gorge, and Rock Springs and Green River.
* WHEN...Until 5 AM MST Thursday.
* IMPACTS...Travel will be difficult, especially for high profile
vehicles.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Use caution if you must drive.
&&
$$
For more information from the National Weather Service, visit
https://weather.gov/riw/ .
Dziewaltowski
Air Stagnation Advisory
URGENT - WEATHER MESSAGE
National Weather Service Boise ID
130 PM MST Wed Dec 10 2025
IDZ012-014-016-033-ORZ061>064-111200-
/O.NEW.KBOI.AS.Y.0004.251212T1200Z-251215T1200Z/
Lower Treasure Valley-Upper Treasure Valley-Western Magic Valley-
Upper Weiser River-Harney County-Baker County-Malheur County-
Oregon Lower Treasure Valley-
Including the cities of Cambridge, Goodrich, Buchanan, Nyssa,
Boise, Ontario, Baker, Venator, Malheur City, Caldwell, Nampa,
Twin Falls, Mesa, Glendale, Burns, Crane, New Princeton, Indian
Valley, Dunnean, Diamond, Council, and Fruitvale
130 PM MST Wed Dec 10 2025 /1230 PM PST Wed Dec 10 2025/
...AIR STAGNATION ADVISORY IN EFFECT FROM 5 AM MST /4 AM PST/ FRIDAY
TO 5 AM MST /4 AM PST/ MONDAY...
* WHAT...An extended period of stagnant air, with light winds and
little vertical mixing. This is due to an inversion near the
surface that will continue to trap pollutants.
* WHERE...Portions of south central and southwest Idaho and
northeast and southeast Oregon.
* WHEN...From 5 AM MST /4 AM PST/ Friday to 5 AM MST /4 AM PST/
Monday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Persons with respiratory illness should follow their physicians
advice for dealing with high levels of air pollution during periods
of stagnant air.
&&
$$
JY
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Riverton WY
319 AM MST Wed Dec 10 2025
WYZ001>020-022>030-111430-
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-
319 AM MST Wed Dec 10 2025
...WINTER STORM WARNING AND WINTER WEATHER ADVISORY REMAINS IN
EFFECT UNTIL 5 PM MST WEDNESDAY...
...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 5 AM MST THURSDAY...
This Hazardous Weather Outlook is for Western and Central Wyoming.
.DAY ONE...Today and tonight.
Moderate snowfall continues for western mountains. Please see Winter
Weather Products and forecasts for details.
Strong to high wind continues from Rock Springs and into Natrona
County. Please see High Wind Warnings for details.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
Thursday...Snow likely for portions of the northern mountains.
Strong to high wind continuing in southern Wyoming.
.SPOTTER INFORMATION STATEMENT...
Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.
$$
Hazardous Weather Outlook
National Weather Service Grand Junction CO
304 AM MST Wed Dec 10 2025
COZ001>014-017>023-UTZ022>025-027>029-111015-
Lower Yampa River Basin-Central Yampa River Basin-
Roan and Tavaputs Plateaus-Elkhead and Park Mountains-
Upper Yampa River Basin-Grand Valley-Debeque to Silt Corridor-
Central Colorado River Basin-Grand and Battlement Mesas-
Gore and Elk Mountains/Central Mountain Valleys-
Central Gunnison and Uncompahgre River Basin-
West Elk and Sawatch Mountains-Flat Tops-Upper Gunnison River Valley-
Uncompahgre Plateau and Dallas Divide-Northwest San Juan Mountains-
Southwest San Juan Mountains-Paradox Valley/Lower Dolores River-
Four Corners/Upper Dolores River-Animas River Basin-
San Juan River Basin-Southeast Utah-Eastern Uinta Mountains-
Eastern Uinta Basin-Tavaputs Plateau-Arches/Grand Flat-
La Sal and Abajo Mountains-Canyonlands/Natural Bridges-
304 AM MST Wed Dec 10 2025
This Hazardous Weather Outlook is for northwest Colorado, southwest
Colorado, west central Colorado, east central Utah, northeast Utah
and southeast Utah.
.DAY ONE...Today and tonight.
Light snow will continue over the northern Colorado mountains this
morning through the early afternoon, with accumulations of 2 to 5
inches over the highest elevations of the Park Range. Expect winter
driving conditions possible due to snow and blowing snow on Rabbit
Ears Pass with minimal if any impacts.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
No hazardous weather is expected at this time.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected today or tonight, however
spotters are encouraged to report snowfall amounts to the
National Weather Service in Grand Junction.
$$
