The last time a derecho hit eastern South Dakota, the sky above Sioux Falls turned green, prompting Reddit users to create images of everything from Cthulhu to the Stay-Puft Marshmallow Man rampaging ...

Todd Heitkamp, a National Weather Service meteorologist, said the line of storms appeared to coalesce into a derecho around ...

A dangerous derecho is expected to form in parts of the Northern Plains and Upper Midwest on Monday, with wind gusts over 75 ...

While two derechos in less than two months is extremely unusual for South Dakota, experts say it's just that — a fluke.

The most intense storms, with wind gusts potentially exceeding 75 m.p.h., were forecast for central and eastern South Dakota, ...

A dangerous derecho is expected to form in parts of the Northern Plains and Upper Midwest on Monday, with wind gusts over 75 ...

FOX Weather Exclusive Storm Tracker Brandon Copic and Meteorologist Ian Oliver talk about the back-to-back tornadoes and the ...

The northern Plains are at risk of strong damaging winds over 80 mph associated with severe weather beginning Monday ...

Severe storms moved through the area Monday night into Tuesday morning. The storm system that moved from South Dakota through ...

Severe thunderstorms are expected to hit eastern South Dakota in the late afternoon July 28, potentially bringing hurricane-force winds to the region.

The severe thunderstorms that passed through eastern South Dakota on July 28 brought powerful winds to the region.

Severe thunderstorms could continue into July 29, bringing havoc to morning commutes in Chicago, Milwaukee and Indianapolis.