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HWORIW

Hazardous Weather Outlook
National Weather Service Riverton WY
248 PM MST Thu Dec 11 2025

WYZ001>020-022>030-130200-
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-
248 PM MST Thu Dec 11 2025

...HIGH WIND WARNING NOW IN EFFECT UNTIL 5 PM MST THIS AFTERNOON...
...WINTER WEATHER ADVISORY IN EFFECT THE BIGHORN MOUNTAINS FROM
5 PM THIS AFTERNOON TO 7 AM MST FRIDAY...
...WINTER WEATHER ADVISORY IN EFFECT FOR NORTHERN JOHNSON COUNTY
FROM 5 PM THIS AFTERNOON TO 7 AM MST FRIDAY...

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...This afternoon and tonight.

Strong wind this morning will gradually decrease through sunset.

Rain will change to snow across northern Wyoming this evening. With
temperatures quickly freezing, a flash freeze is possible across
northern Johnson County after 8PM.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Friday...Light snow continuing across northern Wyoming.

Tuesday and Wednesday...Chances for snow returning to western
Wyoming. Strong wind possible East of the Divide.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

$$