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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May 4, 2003:

The week of May 4th through the 10th, 2003, was the most active week of tornadoes in U.S. history. Tornadoes occurred from Oklahoma to Tennessee, and as far north as northern Illinois. The outbreak first occurred across the Kansas City area from late afternoon into the evening of the 4th. Several thunderstorms became tornadic with a total of five distinct tornado touchdowns in the Kansas City metropolitan area. Two of the tornadoes received a rating of F4, two a rating of F2, and the last was rated was rated F1.

May 4, 2007:

The first official EF5 tornado destroys a town in Kansas. A tornado devastated the town of Greensburg Kansas and the surrounding countryside. It was the strongest recorded tornado since the May 3rd 1999, Moore, Oklahoma twister.


Record Highs: Record Lows:
Aberdeen: 98 (1926) Aberdeen: 20 (2005)
Kennebec: 99 (1926) Kennebec: 16 (1967)
Mobridge: 91 (1918) Mobridge: 22 (1954)
Pierre: 95 (2000) Pierre: 23 (1967)
Sisseton: 91 (1952) Sisseton: 25 (1944)
Timber Lake: 91 (1966) Timber Lake: 21 (1967)
Watertown: 90 (1949) Watertown: 19 (1967)
Wheaton: 96 (1949) Wheaton: 22 (1967)

Record Precipitation: Record Snowfall:
Aberdeen: 1.35" (1905) Aberdeen: 0.6" (1944)
Kennebec: 1.20" (1893) Kennebec: 2.0" (1907)
Mobridge: 1.04" (1999) Mobridge: Trace (2014)
Pierre: 1.04" (1905)
Sisseton: 1.21" (1901)
Timber Lake: 1.26" (1999) Timber Lake: 3.0" (1950)
Watertown: 0.75" (1912) Watertown: Trace (2014)
Wheaton: 1.40" (1977)


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