This Day in National/World Weather History ...
 17 September 1932 → A tropical storm struck the Annapolis Valley in the Canadian Maritimes, destroying 300,000 barrels of apples in Nova Scotia. A second tropical storm would strike Nova Scotia just seven days later.
 17 September 1936 → Tropical storm remnants brought up to 30 inches of rain to central Texas, resulting in massive flooding. In San Angelo the Concho River reached one of its highest stages on record and inundated the city. One thousand homes were damaged or destroyed, two bridges were swept away, and there were 100 rescues performed. Water was six feet deep in the lobby of the Naylor Hotel.
 17 September 1947 → The Fort Lauderdale Hurricane struck the east coast of Florida as a high-end Category 4, resulting in 51 fatalities. Hurricane force winds extended 120 miles out from the center, and produced the highest measured ground wind speeds in a Florida hurricane until Hurricane Andrew. The storm then crossed the Gulf of Mexico and produced 110 mph winds at New Orleans.
 17 September 2004 → Flooding and mudslides killed more than 3,000 people in Haiti in Hurricane Jeanne.

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September 14, 1993:

An early freeze and frost hit the state of South Dakota on the 14th and 15th. On the morning of the 14th some low temperatures included 24 degrees at Rapid City, 19 degrees at Camp Crook and Porcupine, and 31 degrees at Pierre. The 24 degree low at Rapid City broke the old record for the date by 10 degrees and was the earliest in the season it has ever been that cold. The airmass had moderated some by the time in hit eastern South Dakota early on the 15th. Some low temperatures on the 15th included, 28 degrees at Brookings, 30 degrees at Watertown, and 32 at Sioux Falls.

Record Highs: Record Lows:
Aberdeen: 102 (1948) Aberdeen: 28 (1949)
Kennebec: 102 (1939) Kennebec: 28 (2007)
Mobridge: 102 (1948) Mobridge: 28 (1949)
Pierre: 102 (1948) Pierre: 31 (1993)
Sisseton: 97 (1969) Sisseton: 32 (1956)
Timber Lake: 102 (1948) Timber Lake: 25 (1993)
Watertown: 96 (1939) Watertown: 32 (1949)
Wheaton: 94 (1969) Wheaton: 31 (1956)

Record Precipitation:
Aberdeen: 1.38" (2001)
Kennebec: 1.15" (1991)
Mobridge: 0.90" (1917)
Pierre: 0.91" (2001)
Sisseton: 1.54" (1941)
Timber Lake: 1.00" (2001)
Watertown: 1.11" (2001)
Wheaton: 1.67" (2008) is the U.S. government's official web portal to all federal, state and local government web resources and services.