At 226 PM MDT, Doppler radar was tracking a strong thunderstorm 3 miles northwest of Two Top Butte, or 25 miles northeast of Belle Fourche, moving northeast at 20 mph. HAZARD. Wind gusts up to 50 mph and penny size 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 strong thunderstorm will be near. Two Top Butte around 230 PM MDT. Haystack Buttes around 245 PM MDT.

* WHAT. Northwest winds 25 to 35 mph with gusts up to 50 mph expected. * WHERE. Portions of northwestern and southwestern South Dakota. * WHEN. From 6 PM this evening to 3 AM MDT Saturday. * IMPACTS. Sudden wind gusts can cause drivers to lose control, especially in lightweight or high profile vehicles. Strong winds can cause blowing dust, reduced visibility, and flying debris.