Supercell thunderstorms are dangerous storms that unleash large hail, roaring winds and powerful tornadoes.

SIOUX FALLS S.D. (KELO) — A line of strong to severe thunderstorms moved across KELOLAND yesterday and overnight. You can see an interesting picture below from the Redfield area capturing the ...

National Weather Service officials were expecting showers and possibly a thunderstorm to blow through the Chicago area before 10 a.m. Tuesday, in the afternoon and again in the night hours. Officials ...

Weather officials said the threat for flash flooding and severe weather had ended after heavy rains and thunderstorms rolled through the Chicago region. Through the afternoon and into Tuesday night, ...