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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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February 5, 1978:

Another winter blizzard plagued the northern half of the state beginning on February 5th and continuing until the 9th. The unusual aspect of this blizzard was that the wind came from the southeast between 25 to 45 mph. Only one to three inches of new snow accumulation fell during the five-day period but was piled high on the existing large snow drifts. Most of the northern half of the state was paralyzed due to blocked roads. Eighteen counties across the northern part of the state were declared a disaster by the governor. There was also numerous livestock losses.


Record Highs: Record Lows:
Aberdeen: 57 (1991) Aberdeen: -36 (1907)
Kennebec: 64 (1991) Kennebec: -39 (1936)
Mobridge: 51 (1991) Mobridge: -30 (1936)
Pierre: 61 (1991) Pierre: -25 (1936)
Sisseton: 60 (1963) Sisseton: -29 (1936)
Timber Lake: 56 (1991) Timber Lake: -32 (1936)
Watertown: 55 (1963) Watertown: -31 (1936)
Wheaton: 60 (1963) Wheaton: -31 (1982)

Record Precipitation: Record Snowfall:
Aberdeen: 1.00" (1915) Aberdeen: 10.0" (1915)
Kennebec: 0.40" (1914) Kennebec: 4.0" (1914)
Mobridge: 0.28" (1946) Mobridge: 3.4" (1946)
Pierre: 0.20" (1976) Pierre: 4.5" (1944)
Sisseton: 0.35" (2011) Sisseton: 3.2" (2011)
Timber Lake: 0.27" (1946) Timber Lake: 2.8" (2010)
Watertown: 1.18" (1946) Watertown: 13.5" (1946)
Wheaton: 0.70" (1946) Wheaton: 4.0" (1967)


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