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 - 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.