Prepare immediately for large hail and damaging winds. People outside should move to a shelter, inside a strong building and away from windows.

A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM MDT FOR NORTHEASTERN CAMPBELL AND NORTHWESTERN CROOK COUNTIES... At 853 PM MDT, severe thunderstorms were located along a line extending from 3 miles west of Lightning Flat to 4 miles east of Weston, moving east at 30 mph. HAZARD...Golf ball size hail and 70 mph wind gusts. SOURCE...Radar indicated. IMPACT...People and animals outdoors will be injured. Expect hail damage to roofs, siding, windows, and vehicles. Expect considerable tree damage. Wind damage is also likely to mobile homes, roofs, and outbuildings. Locations impacted include... Lightning Flat, Oshoto, New Haven, Weston, Rockypoint and Devils Tower National Monument. HAIL...1.75IN WIND...70MPH