This Day in National/World Weather History ...
 21 August 1883 → What was likely an F5 tornado devastated the north side of Rochester, MN. The tornado derailed a train and leveled farms. 40 people were killed.
 21 August 1888 → A "grand spectacle" of four waterspouts near Jacobson, MD overturned boats and moved ashore. 15 people were injured. Another tornado moved east-northeast near Still Pond, MD killing 10 people in a cannery. A total of 11 deaths and 40 injuries were reported from this tornado.
 21 August 1918 → Tyler, MN suffered a direct hit by an F4 tornado. Six hundred buildings were damaged or destroyed and 36 lives were taken, including three when the town's hospital was struck.
 21 August 1984 → The State Fair in Pueblo, CO had to be closed during a vicious hailstorm. Nine people were hurt, including one seriously.

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August 5, 1987:

Six tornadoes touched down in central South Dakota. Five of theses tornadoes touched down in Lyman county, including three which did damage near Kennebec within 25 minutes of each other. One of the tornadoes destroyed three farms, downing outbuildings, power lines, granaries, and killing farm animals.

August 5, 2000:

A wet microburst with winds estimated at 120 mph caused heavy damage in and around Mitchell. Apartments and several mobile homes were destroyed, vehicles were overturned, and other damage occurred to buildings and vehicles. Widespread tree and power line damage also occurred. Ten people were injured, although the majority of the injuries were minor. The damage path was approximately a mile and a half long and a mile wide, extending over the southwest part of Mitchell.


Record Highs: Record Lows:
Aberdeen: 107 (1941) Aberdeen: 41 (1994)
Kennebec: 109 (1941) Kennebec: 43 (1994)
Mobridge: 108 (1941) Mobridge: 46 (2012)
Pierre: 109 (1941) Pierre: 48 (2012)
Sisseton: 101 (1934) Sisseton: 46 (1994)
Timber Lake: 106 (1941) Timber Lake: 46 (1946)
Watertown: 97 (1937) Watertown: 41 (1915)
Wheaton: 99 (1976) Wheaton: 48 (1990)

Record Precipitation:
Aberdeen: 1.08" (1960)
Kennebec: 1.02" (1950)
Mobridge: 1.99" (1950)
Pierre: 1.39" (1909)
Sisseton: 2.50" (1900)
Timber Lake: 1.10" (1918)
Watertown: 1.32" (1900)
Wheaton: 1.41" (1942)


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