Idaho, Wyoming, Montana Moderate Special Weather Statement | Effective 08/18/2026 15:17

Headline: 
Special Weather Statement issued August 18 at 4:17PM MDT by NWS Riverton WY
Event: 
Special Weather Statement
Urgency: 
Expected
Effective: 
August 18, 2026 - 3:17pm
Expires: 
August 18, 2026 - 3:45pm
Description: 
At 417 PM MDT, Doppler radar was tracking a strong thunderstorm 7 miles northeast of Grant Village, moving east at 25 mph. HAZARD...Wind gusts up to 50 mph and half inch hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. This storm will remain over mainly rural areas of northeastern Teton County.
Instruction: 
If outdoors, consider seeking shelter inside a building. If on or near Yellowstone Lake, get out of the water and move indoors or inside a vehicle. Remember, lightning can strike out to 10 miles from the parent thunderstorm. If you can hear thunder, you are close enough to be struck by lightning. Move to safe shelter now! Do not be caught on the water in a thunderstorm. Persons in campgrounds should consider seeking sturdy shelter until this storm passes.
Area Description: 
Yellowstone National Park
Forcast Office: 
NWS Riverton WY
Sender: 
w-nws.webmaster@noaa.gov