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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September 17, 1969:

In the late afternoon 16 miles east of Pierre in Hughes County, 60 mph wind driven penny size hail damaged crops and buildings in the area. Unofficial amounts of 5 to 6 inches of rain also occurred with the storms.

September 17, 1975:

Heavy rain and hail fell in the Pierre area during the night flooding streets and some basements. Power lines were downed by the strong winds. The damage estimate was in excess of 100,000 dollars.

September 17, 2000:

Lightning started a grassfire in western Stanley County in the early morning hours of the 17th. With the extremely dry and windy conditions, the fire quickly spread and consumed 25,000 acres of grassland before it was brought under control. Smoke from the fire was seen from 40 miles away. The fire also destroyed six outbuildings and an old unoccupied farmhouse. Some roads had to be closed due to the fire and smoke. Several electrical poles were also burned. Many residents were notified of possible evacuations. The fire was finally put out in the early morning hours of the 18th.


Record Highs: Record Lows:
Aberdeen: 97 (1955) Aberdeen: 28 (1903)
Kennebec: 101 (1955) Kennebec: 24 (1903)
Mobridge: 96 (1989) Mobridge: 32 (1930)
Pierre: 104 (2000) Pierre: 34 (1981)
Sisseton: 96 (1955) Sisseton: 28 (1900)
Timber Lake: 96 (1989) Timber Lake: 31 (1965)
Watertown: 93 (1988) Watertown: 24 (1900)
Wheaton: 94 (1955) Wheaton: 26 (1918)

Record Precipitation:
Aberdeen: 2.50" (1967)
Kennebec: 0.81" (1950)
Mobridge: 2.25" (1977)
Pierre: 1.94" (1969)
Sisseton: 0.65" (1942)
Timber Lake: 0.70" (1967)
Watertown: 1.07" (1942)
Wheaton: 1.50" (2006) Wheaton: Trace (1918)


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