This Day in National/World Weather History ...
 23 April 1792 → John Thomas Romney Robinson, inventor of the cup anemometer, was born.
 23 April 1908 → An extensive tornado outbreak began around noon today in Minnesota, and wouldn't end until the evening of the 25th in Georgia. The strongest tornado of the event was an F5 (estimated) near Pender, NE today where a farm was swept away and debris was found 35 miles distant.
 23 April 1910 → The temperature at the Civic Center in Los Angeles hit 100 degrees to establish an April record for the city.
 23 April 1988 → In southern California, a winter-like storm brought thunderstorms. Nine girls in Tustin were injured when lightning struck the tree they were standing under to shield themselves from the rain.

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November 20, 1975:

A storm center located in Oklahoma on Tuesday, November 18th, moved northeastward across Kansas into Iowa and Wisconsin on Wednesday the 19th and Thursday the 20th. Light rain began in the eastern half South Dakota on the morning of the 19th. The rain changed to snow during the afternoon, and continued through the afternoon of the 20th. The winds increased and blizzard conditions were reached by 6pm CST on Wednesday the 19th. The snow was driven by sustained winds 40 to 50 miles per hour, gusting to 75 miles per hour on some occasions, which reduced visibility to less than one half mile. Heavy snow ranging from six to fifteen inches fell over an area southeast of a line from Todd to Aurora to Grant County. Traffic came to a standstill by Wednesday evening the 19th. The snow abruptly ended on the evening of the 20th, but winds diminished rather slowly that night. Storm total snowfalls included 9 inches at Clear Lake and 7 inches at Watertown.

November 20, 1977:

The second blizzard of the month began very early on Saturday, November 19th and continued through most of Sunday, November 20th. Wind speeds exceeding 50 mph caused much blowing and drifting snow. Visibilities were frequently reduced to near zero. Most of the roads in the northern and western parts of the state were blocked. Snowfall amounts north of Milbank and Pierre to Ardmore exceeded five inches. Most of the counties in the northwest and a large portion of those in the north central parts of the state reported snowfall amounts exceeding ten inches. Some drifts reached 4 to 5 feet. The greatest reported snowfall was 20 inches in Eagle Butte. An eastbound train from Milbank had six freight cars derailed near Albee, in Grant County as a result of the storm. Snowfall totals from this blizzard included; 20 inches at Eagle Butte; 14 inches at Leola; 12 inches at Timber Lake and Britton; 11 inches 4NNE Victor and at Mobridge; 10 inches at 6SE McIntosh, 4W Mellette, Sand Lake, and Ipswich; 9.3 inches in Aberdeen; 9 inches 4NW Onida, at Sisseton, and 2N Onaka; 8 inches at Selby; 7 inches at McLaughlin and Waubay; 6 inches at Conde and Faulkton; 5 inches at Summit and Webster; 4 inches at Pierre, Wilmot and Highmore; and 3 inches at Watertown, Clear Lake, Miller, 3NE Raymond, Redfield, and Wheaton. The 9 inches at Sisseton helped to contribute to the snowiest November on record for Sisseton, which recorded 27.5 inches for the month of November 1977.


Record Highs: Record Lows:
Aberdeen: 69 (1962) Aberdeen: -12 (1985)
Kennebec: 78 (1962) Kennebec: -15 (1921)
Mobridge: 68 (1917) Mobridge: -10 (1937)
Pierre: 73 (1962) Pierre: -7 (1937)
Sisseton: 69 (1962) Sisseton: -8 (1978)
Timber Lake: 67 (1962) Timber Lake: -9 (1937)
Watertown: 64 (1962) Watertown: -13 (1921)
Wheaton: 66 (1962) Wheaton: -4 (1978)

Record Precipitation: Record Snowfall:
Aberdeen: 0.83" (1953) Aberdeen: 9.0" (1953)
Kennebec: 0.72" (2008) Kennebec: 6.0" (1930)
Mobridge: 0.50" (1930) Mobridge: 5.0" (1930)
Pierre: 0.16" (1987) Pierre: 2.0" (1953)
Sisseton: 0.83" (1953) Sisseton: 6.0" (1977)
Timber Lake: 0.27" (1947) Timber Lake: 4.0" (1977)
Watertown: 0.86" (1947) Watertown: 5.0" (1975)
Wheaton: 1.11" (1930) Wheaton: 3.5" (1948)"


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