National Weather Service United States Department of Commerce

Heat Wave Expands to the East Coast; Flash Flooding Likely in the Central Plains into the Midwest; Severe Thunderstorms in the Northeast

Dangerous, prolonged heat is ongoing in the Mid-South to Mid-Mississippi Valley and heat expands into the Northeast for a brief period today. Widely scattered instances of flash flooding due to heavy rains are forecast from northeast Kansas to much of Indiana. Scattered strong to severe thunderstorms are possible across parts of New England, northern Mid-Atlantic, and North Dakota. Read More >

Weather History Archive

Weather History - May 21st

May 21st, 1977:

Observers south of Clear Lake saw five tornadoes. One was five miles south of town, moving northeast. Another was four miles south and one mile west of Clear Lake. Both destroyed trees and some small buildings. Three other tornadoes were sighted about two miles south of town. These touched down only momentarily, with no damage occurring.

Two tornadoes were seen in southern Codington County. One was seen at Grover, and the other was five miles south of Watertown. No damage was reported.

A tornado was on the ground near Revillo. A few barns and some outbuildings were damaged.

May 21st, 1992:

A severe thunderstorm moved over Northwestern Edmunds County, causing high winds and penny-sized hail. In Bowdle, there was considerable wind damage. Tree limbs more than five inches in diameter were broken off and fell on a car. Other tree branches went through the roof of a home. Two pickup trucks were rolled on their sides. Three miles ENE of Bowdle, a garage was moved 20 feet off its foundation and stopped by a large tractor.