RIVERTON, Wyo. – Drivers and residents across central and western Wyoming should prepare for fast-changing conditions as summer-like warmth gives way to storms, fire danger, and even high-elevation snow by early next week.
According to the National Weather Service in Riverton, isolated thunderstorms are possible Saturday afternoon and evening across southwestern Wyoming. By Sunday, thunderstorm chances expand, and with dry fuels, elevated fire danger may develop in portions of Fremont and Natrona counties. Residents should avoid outdoor burning and stay alert for lightning-triggered grass fires.
The bigger change arrives Monday as a sharp cold front sweeps through the state. Showers and isolated thunderstorms are expected, with much cooler temperatures settling into Riverton and the Wind River Basin. In the northern mountains above 9,000 feet, forecasters say snow could accumulate, signaling an early taste of fall in the higher terrain. Travelers along US-26 near Togwotee Pass and mountain passes west of Dubois should prepare for slick roads and reduced visibility.
Daytime highs, which reached the 80s Saturday, will fall into the 60s by Monday and low 70s by Tuesday. Winds may gust up to 25 mph in some valleys, creating difficult conditions for high-profile vehicles.
Spotters are encouraged to report severe weather, and residents should monitor local alerts as conditions shift quickly.
Warnings may continue through early week as the pattern remains unsettled.
Five-Day Forecast for Riverton, WY:
- Saturday: Mostly sunny, high near 84.
- Sunday: Partly sunny, high 79. Afternoon thunderstorms possible.
- Monday: Showers likely, high 67. Cooler.
- Tuesday: Sunny, high near 70. Breezy.
- Wednesday: Sunny, high near 77.
