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 30 July 1119 → The earliest tornado reported on the European mainland struck Vysehrad, Czechia (today Prague, Czech Republic). It destroyed the palace of a Czech duke.
 30 July 1997 → Two waterspouts moved onshore in northern Virginia Beach, VA. One tracked into Norfolk.
 30 July 1999 → At nine o'clock in the morning Chicago recorded its highest ever dew point temperature of 82 degrees. The temperature at the time was 88, resulting in a heat index of 108. The dew point is an indication of the amount of moisture in the air.

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April 28, 1994:

Snow accumulated 5 to 12 inches over most of the eastern half of South Dakota, with the 12 inch report from Winner. Ten to eleven inches of snow were reported at numerous places including Sioux Falls and Platte in the southeast, and Summit in the northeast. Numerous accidents were caused by snow and ice, including one which killed a man and injured two women on highway 12 near Bath, South Dakota. There was some undetermined crop damage, and livestock loss was feared as the late season cold and snow lowered resistance to disease.


Record Highs: Record Lows:
Aberdeen: 90 (1934) Aberdeen: 19 (2008)
Kennebec: 93 (1910) Kennebec: 16 (1926)
Mobridge: 91 (1952) Mobridge: 20 (1958)
Pierre: 96 (2001) Pierre: 20 (2008)
Sisseton: 90 (1934) Sisseton: 21 (1958)
Timber Lake: 91 (2001) Timber Lake: 21 (2008)
Watertown: 94 (1910) Watertown: 18 (2008)
Wheaton: 91 (2004) Wheaton: 19 (1956)

Record Precipitation: Record Snowfall:
Aberdeen: 1.84" (1989) Aberdeen: 4.5" (1994)
Kennebec: 1.20" (1896) Kennebec: 5.0" (1994)
Mobridge: 2.11" (1989) Mobridge: 1.0 (1994)
Pierre: 1.52" (1975) Pierre: 1.9" (1994)
Sisseton: 0.89" (1901) Sisseton: 1.5" (1994)
Timber Lake: 2.50" (1989) Timber Lake: 8.0" (1989)
Watertown: 1.27" (1897) Watertown: 1.8" (1994)
Wheaton: 1.48" (1918) Wheaton: 1.0" (1990)


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