1990: A small F0 tornado blew over two mobile homes on the north side of Groton. Numerous trees were either blown down or lost limbs. Also strong winds of 65 mph occurred 5 miles south and 1 mile east of Mellette.

2008: Severe thunderstorms developed along the eastern slopes of the Black Hills and dropped large hail and heavy rain over eastern Custer and Shannon Counties. Softball sized hail was reported south of Hermosa.

2011: High water levels coming into June along with above normal June rainfall kept water levels up on Blue Dog, Bitter, Rush, and Waubay Lakes in Day County throughout the month. The high lake levels continued to cause extensive road and property damage. Many families remained away from their homes and cabins. Also, hundreds of acres of farmland remained flooded along with many roads. Road and property damage would be in the several millions of dollars. The high lake levels

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