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 4, 1993:

Winds gusting to 40 to 60 mph combined with snowcover along with new snow to cause blizzard conditions making travel hazardous across north central and northeast South Dakota. Several vehicles were stranded or slid into ditches. The strong winds toppled a private building under construction at Selby in Walworth County. New snowfall amounts were generally from one to three inches.

December 4, 1995:

Winds of 40 to 60 mph occurred across central and north central South Dakota from the late afternoon into the middle of the evening as a strong area of low pressure in southern Canada pushed a vigorous cold front across the area.


Record Highs: Record Lows:
Aberdeen: 56 (1979) Aberdeen: -18 (1927)
Kennebec: 70 (1975) Kennebec: -18 (1897)
Mobridge: 69 (1965) Mobridge: -24 (1927)
Pierre: 66 (1975) Pierre: -5 (2002)
Sisseton: 55 (1939) Sisseton: -14 (1991)
Timber Lake: 70 (1965) Timber Lake: -13 (1927)
Watertown: 57 (1916) Watertown: -18 (1927)
Wheaton: 52 (1916) Wheaton: -14 (1991)

Record Precipitation: Record Snowfall:
Aberdeen: 0.70" (1927) Aberdeen: 7.0" (1927)
Kennebec: 0.20" (1910) Kennebec: 3.0" (2002)
Mobridge: 0.67" (1960) Mobridge: 3.9" (1960)
Pierre: 0.33" (1972) Pierre: 3.3" (1972)
Sisseton: 0.79" (1955) Sisseton: 10.0" (1955)
Timber Lake: 0.31" (1960) Timber Lake: 2.0" (1955)
Watertown: 0.90" (1960) Watertown: 5.0" (1926)
Wheaton: 0.67" (1955) Wheaton: 7.6" (2010)


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