Torrential rainfall is also occurring with these storms, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. Persons in campgrounds should consider seeking sturdy shelter until these storms pass.

SIGNIFICANT WEATHER ADVISORY... At 444 PM MDT, Doppler radar was tracking strong thunderstorms along a line extending from near Ranchester to near Fort Phil Kearny Historical Site. Movement was north at 25 mph. Dime size hail and wind gusts up to 50 mph are possible with these storms. Locations impacted include... Sheridan, Ranchester, Big Horn, Tongue River Reservoir, Banner, Kirby, Rosebud Battlefield Park and Story.