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 ...

A moderate threat for severe storms is in place for parts of South Dakota and Minnesota on Monday afternoon into the evening due to the threat of a derecho.

The last time a derecho hit eastern South Dakota, the sky above Sioux Falls turned green, prompting Reddit users to create ...

A fierce and long-lasting line of severe thunderstorms called a derecho is likely to tear across the Northern Plains to kick ...

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

Thousands were without power and damage was seen across the Siouxland area after storms moved into the area on Monday, July ...

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

Storm Chasers captured unreal footage of massive tornadoes ripping through northern South Dakota. One of the first tornadoes ...

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

A 2020 derecho caused widespread damage across Massachusetts and southern New England. What to know about these destructive storms.

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