Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Riverton WY
354 PM MDT Mon Sep 22 2025

WYZ001>020-022>030-240200-
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-
354 PM MDT Mon Sep 22 2025

...Freeze Warning in effect from 5 AM TO 10 AM MDT Tuesday for
Jackson and Star Valley and southern Lincoln County...

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...This afternoon and tonight.

Showers and isolated thunderstorms remain widespread across the
forecast area today. Locally heavy rain will be possible across
portions of the Wind River Basin through the evening.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Tuesday...Freezing temperatures expected across the western WY
valleys in the morning. Patchy fog is also possible across the
western WY valleys and Yellowstone National Park early Tuesday
morning.

.SPOTTER INFORMATION STATEMENT...

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

$$