Riverton, Wyo. – After a quiet Saturday, stormy skies are expected Sunday as thunderstorms build across central and western Wyoming. Drivers along U.S. Highways 20 and 26 near Riverton should prepare for heavy rain, gusty winds, and lightning by late afternoon.
According to the National Weather Service in Riverton, isolated showers and storms will begin developing Sunday before becoming more widespread into the night. Storm activity is expected to expand across much of Wyoming through midweek, with Wednesday and Thursday carrying the greatest risk of widespread storms and localized flooding.
Communities from Casper to Rock Springs should anticipate rapid afternoon weather changes. Outdoor plans, including recreation around Yellowstone and the Wind River Range, may be disrupted by lightning and brief heavy downpours. Forecasters urge residents to monitor conditions closely and avoid high mountain trails during storm hours.
Power outages remain possible if stronger storm cells produce frequent lightning or strong wind gusts. Motorists are advised to keep devices charged and delay travel during peak storm activity. If skies darken quickly, pulling over safely is recommended to avoid reduced visibility on rural stretches.
Storm chances persist daily through Friday, with Monday and Thursday appearing especially active. Despite the stormy pattern, temperatures will remain seasonable, ranging from the upper 70s to low 80s.
Weather spotters in Fremont County are encouraged to report significant rainfall totals or storm-related damage. The National Weather Service may issue additional watches or warnings as the week unfolds.
Five Day Forecast – 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.
