Hazard Report Provided By forecast.weather.gov

Hazardous Weather Outlook
National Weather Service Riverton WY
207 AM MDT Wed Apr 15 2026

WYZ001>020-022>030-161215-
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-
207 AM MDT Wed Apr 15 2026

...WINTER STORM WARNING IN EFFECT FROM 6 PM THIS EVENING TO THROUGH
FRIDAY...

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...Today and tonight.

Colder temperatures and snowfall will begin to move into the
northwest mountain ranges. See latest Winter Storm Warnings for
further details.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Thursday through Friday...Colder temperatures and precipitation
continue to sweep across the state Thursday. Gusty north wind 30 to
45 mph accompanies the cold front. A hard freeze is probable (90%)
both Thursday night and Friday night.

.SPOTTER INFORMATION STATEMENT...

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

$$

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
1156 AM MDT Wed Apr 15 2026

WYZ008-009-161300-
/O.NEW.KRIW.WW.Y.0015.260416T1500Z-260417T1200Z/
Bighorn Mountains West-Bighorn Mountains Southeast-
1156 AM MDT Wed Apr 15 2026

...WINTER WEATHER ADVISORY IN EFFECT FROM 9 AM THURSDAY TO 6 AM MDT
FRIDAY...

* WHAT...Snow and wind expected. Total snow accumulations between 6
  and 13 inches for elevations above 7,000 feet. Total snow
  accumulations of 9 to 12 inches across Powder River Pass. Winds
  gusting between 35 and 55 mph.

* WHERE...Bighorn Mountains Southeast and Bighorn Mountains West.

* WHEN...From 9 AM Thursday to 6 AM MDT Friday.

* IMPACTS...Travel could be difficult, especially over Powder River
  Pass, on Thursday. Gusty winds will cause limited visibility.

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 .

&&

$$

Hazard Report Provided By forecast.weather.gov