Hazardous Weather Outlook
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
631 FLUS45 KRIW 110742 HWORIW Hazardous Weather Outlook National Weather Service Riverton WY 142 AM MDT Sat Oct 11 2025 WYZ001>020-022>030-111330- 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- 142 AM MDT Sat Oct 11 2025 ...FREEZE WATCH IN EFFECT FROM LATE SUNDAY NIGHT THROUGH MONDAY MORNING... This Hazardous Weather Outlook is for Western and Central Wyoming. .DAY ONE...Today and Tonight. Increasing chances for showers across the south this morning, spreading to the northeast through the day. Isolated showers will be possible over western portions by mid morning, becoming likely after 12PM. Locally heavy rain and possible localized flash flooding will be the main threat, with a chance for small hail with the stronger storms. Snow levels over the west will be dropping from 10000 ft to 6000 ft through the evening as a cold front moves through. This could result in a wet slushy snow in the Jackson and Star Valleys before midnight. Winds will be increasing as the cold front progresses eastward tonight. Expect gusts of 35 to 50 mph across much of the area. Locally higher gusts to 60 mph will be possible in wind prone locations. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Sunday...Light snow will continue across the northern and western mountains, including Yellowstone NP, through the morning and ending in the afternoon. Monday...Morning lows on Monday are forecast to be well below freezing across the state. Western WY may see lows in the teens to low 20s with the remainder of the state seeing temperatures in the upper 20s to near 30 degrees. Tuesday through Friday...Chances for precipitation return to western portions Tuesday, with more widespread chances Wednesday through Friday. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to Standard Operating Procedures. $$