


Hazardous Weather Outlook
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
128 FLUS45 KRIW 290928 HWORIW Hazardous Weather Outlook National Weather Service Riverton WY 328 AM MDT Fri Aug 29 2025 WYZ001>020-022>030-301330- 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- 328 AM MDT Fri Aug 29 2025 This Hazardous Weather Outlook is for Western and Central Wyoming. .DAY ONE...Today and tonight. Isolated to widely scattered showers and thunderstorms across southern Wyoming and along and east of the Divide. Stronger showers or thunderstorms could be capable of gusty 40 mph outflows across southern Wyoming. Brief periods of heavy downpours are possible, especially across Johnson County. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Saturday... Isolated to scattered thunderstorm chances mainly along and east of the Divide with lightning being the primary hazard. Tuesday and Wednesday... Isolated afternoon and early evening thunderstorm chances. .SPOTTER INFORMATION STATEMENT... Spotters are requested to submit rainfall totals online. $$