This Day in National/World Weather History ...
 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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May 31, 1960:

A late evening thunderstorm cut a path of destruction, principally from high winds from Beadle County, northeast to Roberts and Grant Counties. Twelve head of cattle electrocuted for a downed high tensions wire occurred at Wolsey. Winds with gusts of 65 to 75 mph were observed at Huron and Watertown. A grain elevator tipped over and a windmill was destroyed near Willow Lake. A Steel corn crib was blown over at Hayti and damaged occurred to other farm buildings and implements.


Record Highs: Record Lows:
Aberdeen: 100 (1934) Aberdeen: 23 (1897)
Kennebec: 100 (1934) Kennebec: 33 (1903)
Mobridge: 97 (1934) Mobridge: 32 (2012)
Pierre: 95 (1940) Pierre: 33 (2012)
Sisseton: 110 (1934) Sisseton: 35 (1964)
Timber Lake: 96 (1914) Timber Lake: 34 (1964)
Watertown: 101 (1934) Watertown: 24 (1897)
Wheaton: 91 (2002) Wheaton: 35 (1964)

Record Precipitation:
Aberdeen: 1.10" (1919)
Kennebec: 0.84" (1970)
Mobridge: 1.70" (1981)
Pierre: 2.46" (1949)
Sisseton: 2.33" (1954)
Timber Lake: 0.99" (1980)
Watertown: 3.26" (1945)
Wheaton: 2.44" (1938)


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