RIVERTON, Wyo. – A quiet Saturday will give way to stormy skies Sunday as thunderstorms build across central and western Wyoming. Drivers along U.S. Highways 20 and 26 near Riverton could face heavy rain, lightning, and gusty winds by late afternoon.
According to the National Weather Service in Riverton, isolated showers and thunderstorms will begin developing Sunday, with chances increasing into Sunday night. Storm activity will expand statewide through midweek, with Wednesday and Thursday showing the highest risk of widespread storms and localized flooding.
Communities from Casper to Rock Springs should prepare for rapid weather changes each afternoon. Outdoor plans, including recreation near Yellowstone and the Wind River Range, may be disrupted by lightning and brief heavy downpours. The National Weather Service advises residents to monitor forecasts closely and avoid high mountain trails during storm hours.
Power outages remain possible if strong cells produce frequent lightning or gusty winds. Drivers are urged to keep phones charged and delay travel during peak storm activity. If skies darken quickly, pull over safely rather than risk reduced visibility on rural stretches.
Storms are expected daily through Friday, with Monday and Thursday appearing most active. While temperatures remain seasonable, between the low 80s and upper 70s, unsettled conditions will dominate much of the upcoming week.
Weather spotters across Fremont County are encouraged to report significant rainfall totals or storm damage. Additional watches or warnings may be issued as the week unfolds.
Five Day Forecast for Riverton, WY:
- Sunday: High near 84. Afternoon thunderstorms likely, especially after 3 p.m.
- Monday: High near 82. Scattered storms possible, some with gusty winds.
- Tuesday: High near 82. Chance of showers and thunderstorms, 30%.
- Wednesday: High near 81. Best chance for storms; stronger cells possible.
- Thursday: High near 79. More thunderstorms, especially in the afternoon.
