The thunderstorm risk level went from enhanced to moderate for the area, with timing now pushed back to between 5 p.m. and 1 ...

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

The National Weather Service in Sioux Falls has confirmed a tornado in Lyon County, Iowa, that occurred during Monday's derecho event.

Severe storms overnight in Iowa caused fallen trees and downed power lines. See storm damage reports from across the state.

Monday’s storm system produced two tornadoes in Gregory County and a third near Alvord, Iowa, in Lyon County, the National ...

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

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

A group of inmates from the South Dakota Department of Corrections system is helping with the storm clean-up in Hudson.

To be called a derecho, the thunderstorm-generated high winds and wind damage should cover a distance of at least 250 miles ...

Jeff Chapman, a meteorologist with the National Weather Service in Sioux Falls, said thunderstorms and strong winds between ...