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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August 9, 1918:

An estimated F2 tornado touched down east of Bristol and moved NNE. The tornado was quoted as looking like a long snake like spiral, smashing barns into kindling.

August 9, 1992:

A tornado packing winds estimated between 113 and 157 mph caused major damage to the town of Chester, in Lake County. Shortly after 7 pm CDT a tornado tore right through the heart of Chester causing considerable damage. Four businesses were destroyed, three others had major damage, and five had minor damage. An elevator and new grain bin were leveled and another bin was heavily damaged. Most of the building housing the fire department was demolished. Also many houses and vehicles sustained damage and large trees were uprooted or broken off. In one instance a steel beam was thrust through a garage and into the car inside. One mile north of Chester, an entire house was moved off the foundation. The town had to be evacuated for 19 hours after the tornado because the tornado damaged a 12,000 gallon ammonia tank releasing 4,000 gallons of the liquid gas into the air. The ammonia was a health hazard forcing residents out. To the south of Chester the storm destroyed a new convenience store and blew two fuel tanks over 100 yards.


Record Highs: Record Lows:
Aberdeen: 105 (1947) Aberdeen: 41 (1927)
Kennebec: 113 (1947) Kennebec: 40 (1927)
Mobridge: 110 (1947) Mobridge: 42 (1927)
Pierre: 113 (1947) Pierre: 46 (1966)
Sisseton: 102 (1947) Sisseton: 46 (1934)
Timber Lake: 109 (1947) Timber Lake: 41 (1939)
Watertown: 104 (1947) Watertown: 38 (1927)
Wheaton: 102 (1958) Wheaton: 42 (1927)

Record Precipitation:
Aberdeen: 2.92" (1994)
Kennebec: 1.40" (1979)
Mobridge: 0.66" (1938)
Pierre: 1.93" (1933)
Sisseton: 1.08" (1974)
Timber Lake: 0.78" (1962)
Watertown: 3.37" (1994)
Wheaton: 0.65" (1974)


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