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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December 6, 1969:

An unusual period of almost continuous snow began in southern Minnesota and eastern South Dakota on the afternoon of the 5th and continued until late on the 10th. The Minneapolis-St. Paul Airport reported 88 2/3 consecutive hours of snowfall, which amounted to 14.2 inches total. The snowfall was generally 3-9 inches in the western half of Minnesota, with slightly lesser amounts in eastern South Dakota. 2.0 inches fell at Summit and Sisseton; 2.5 inches at Watertown and Waubay; 3.0 inches at Clear Lake; 3.1 inches at Aberdeen; and 4.0 inches at Artichoke Lake, Webster, and Milbank.


Record Highs: Record Lows:
Aberdeen: 69 (1939) Aberdeen: -30 (1972)
Kennebec: 74 (1939) Kennebec: -21 (1972)
Mobridge: 70 (1939) Mobridge: -24 (1950)
Pierre: 74 (1939) Pierre: -23 (1950)
Sisseton: 70 (1939) Sisseton: -22 (1972)
Timber Lake: 60 (1991) Timber Lake: -23 (1972)
Watertown: 69 (1939) Watertown: -25 (1972)
Wheaton: 50 (1916) Wheaton: -24 (1972)

Record Precipitation: Record Snowfall:
Aberdeen: 0.38" (1951) Aberdeen: 2.5" (1935)
Kennebec: 0.74" (1951) Kennebec: 3.0" (1954)
Mobridge: 0.59" (1951) Mobridge: 3.9" (1951)
Pierre: 0.89" (1951) Pierre: 7.0" (1951)
Sisseton: 0.36" (1951) Sisseton: 2.5" (1961)
Timber Lake: 0.77" (1951) Timber Lake: 7.5" (1951)
Watertown: 0.17" (1935) Watertown: 0.8" (1993)
Wheaton: 0.20" (1935) Wheaton: 2.5" (1927)


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