This Day in National/World Weather History ...
 17 April 1922 → Seven tornadoes caused death and destruction along parts of a 210 mile swath from north of Ogden, IL to Allen County, OH, killing 16 people. There were three F2s, two F3s, and two F4s. A post card, picked up in Madison County, IN was found 124 miles away near Mount Cory, OH.
 17 April 1935 → A hailstone reportedly 8" in diameter hit near Ponca City, OK.
 17 April 1952 → Massive flooding throughout the Northern Plains and Upper Midwest reached its peak. Large portions of the Dakotas, Minnesota, and Iowa were inundated. At Sioux City, IA the Missouri River raced by at 30 mph filled with telephone poles, trees, furniture, and other debris from upstream. In the Omaha/Council Bluffs area 30,000 people were evacuated. At St Paul, MN the Mississippi hit a record high and forced 7000 people from their homes.
 17 April 1953 → A storm containing hail, ice, snow, sleet, and rain battered Oklahoma, with 10,000 claims turned into insurance companies.
 17 April 2004 → A 182-day long streak of no measurable rain began in San Diego, CA. The streak ended on October 17.

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May 7, 1840:

The second deadliest single tornado in United States history occurred in Natchez, Mississippi. This tornado started in Concordia Parish, Louisiana, and moved up the Mississippi, killing 317 people.

May 7, 1896:

A strong, estimated F3 tornado moved northeast from 12 miles SSW of Clark, to 3 miles west of Watertown, to beyond Lake Kampeska. It was estimated to be on the ground for a distance of 30 miles. Near the start of the path, a woman was killed and 10 people were injured in one home. Parts of a home were found up to two miles away. Barns were leveled near Watertown.


Record Highs: Record Lows:
Aberdeen: 94 (1928) Aberdeen: 24 (1982)
Kennebec: 98 (1928) Kennebec: 23 (1976)
Mobridge: 94 (1992) Mobridge: 20 (1929)
Pierre: 95 (1963) Pierre: 23 (1943)
Sisseton: 109 (1934) Sisseton: 26 (1976)
Timber Lake: 92 (1992) Timber Lake: 22 (1943)
Watertown: 89 (1934) Watertown: 21 (1976)
Wheaton: 91 (1916) Wheaton: 24 (1929)

Record Precipitation: Record Snowfall:
Aberdeen: 1.24" (2000) Aberdeen: 8.0" (1907)
Kennebec: 1.14" (1933) Kennebec: 2.5" (1907)
Mobridge: 1.30" (1927)
Pierre: 1.24" (2000) Pierre: 1.5" (1907)
Sisseton: 1.23" (1993)
Timber Lake: 1.20" (1927) Timber Lake: 2.0" (1950)
Watertown: 1.55" (1978) Watertown: 3.0" (1907)
Wheaton: 0.55" (1932)


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