This Day in National/World Weather History ...
 30 October 1948 → The Donora, PA smog disaster finally came to an end. For five days pollution from industry in the area was trapped in the lower atmosphere over the Monongahela Valley, killing 20 people and making 2000 people sick.
 30 October 2004 → University of Hawaii students visiting the library had to escape through a window due to surging flood waters.
 30 October 2011 → An unusually severe early season winter storm swept up the Appalachians into New England. Over a foot of snow fell from West Virginia to Maine, with more than two feet in the mountains of Massachusetts and New Hampshire. Winds over 50 mph were reported on Nantucket Island and Martha's Vineyard.

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August 21, 1989:

Extensive crop damage was done from Correll in Big Stone County to 10 miles north of Appleton. Baseball size hail caused near 100 percent crop damage. Most of Swift County also received 4 to 8 inches of rain.

August 21, 2007:

Thunderstorms produced large hail in southeast South Dakota, mainly near the Missouri River, during the late afternoon and early evening of August 21st. Very large hail fell in the Dante area in Charles Mix County, including a state record size hailstone certified as 6 and 7/8 inches in diameter. Very large hail broke windows, dented vehicles, and damaged roofs in Wagner. Crop damage was also reported. The largest stone was verified at 6 1/8 inches in diameter with a weight of 1.25 pounds. The amount of property and crop damage was not known. A larger hailstone was verified in the town of Dante with 6 7/8 inches in diameter. The storm also produced numerous stones around softball size. Damage included holes in roofs, broken rafters, broken awnings, numerous broken windows and dented vehicles, damaged siding, divots in the ground up to 12 inches long and 3 inches deep, and damaged crops. The amount of property and crop damage was not known. The state record hailstone was broken on July 30th, 2010 with the United States record hailstone in Vivian.


Record Highs: Record Lows:
Aberdeen: 105 (1947) Aberdeen: 37 (2004)
Kennebec: 104 (1976) Kennebec: 39 (1986)
Mobridge: 105 (1947) Mobridge: 44 (1920)
Pierre: 104 (1947) Pierre: 43 (1986)
Sisseton: 102 (1947) Sisseton: 35 (2004)
Timber Lake: 103 (1947) Timber Lake: 42 (1939)
Watertown: 99 (1976) Watertown: 38 (2004)
Wheaton: 101 (1976) Wheaton: 38 (1925)

Record Precipitation:
Aberdeen: 1.80" (1916)
Kennebec: 0.75" (1963)
Mobridge: 1.90" (1930)
Pierre: 0.94" (1906)
Sisseton: 2.58" (1964)
Timber Lake: 1.23" (1954)
Watertown: 2.73" (1916)
Wheaton: 2.32" (1916)


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