National Weather Service United States Department of Commerce

Severe Thunderstorms, Heavy Rainfall and Dangerous Heat

Severe thunderstorms are expected today and Friday from the upper Midwest, central Great Lakes into the Ohio and mid-Mississippi Valley's. In addition, heavy rainfall threat increases on Friday across the Ohio Valley. Meanwhile, early summer-like heat wave across portions of southern Texas with new daily records are forecast today and through the weekend; The heat spreads across the Gulf States. Read More >

Weather History - April 21st

Local and Regional Events:

April 21st, 2007:

Heavy rains of 2 to 2.50 inches caused flash flooding in and around Watertown. Many streets and several roads outside of town were flooded. During the evening, a warm front extending across the region was the focus for heavy rain and severe weather across far northeast South Dakota. Hail up to the size of quarters, along with heavy rains of over 2 inches, caused some flooding, mainly in Codington and Hamlin counties.