This Day in National/World Weather History ...
 21 September 1588 → After an unsuccessful battle with the English fleet, the Spanish Armada encountered strong storms and high winds off the coast of Ireland on its way back to Spain. 26 ships are believed to have been lost. The remaining ships limped back to Spain defeated and demoralized, ending the reign of the once unbeatable Spanish Armada.
 21 September 1894 → A huge tornado outbreak swept from Iowa through Minnesota to Wisconsin, with an unusual number of extremely violent tornadoes. The tornado that rampaged through Kossuth County, MN, was likely an F5 as homes and farms were wiped clean from the earth.
 21 September 1909 → A category 3 hurricane crossed the Gulf of Mexico and came ashore in southern Louisiana. The storm inflicted 120 mph winds on southeast Louisiana and took its storm surge 2 miles inland. There were about 371 fatalities despite the Weather Bureau having issued its first warnings for the storm three days earlier.
 21 September 1938 → The New England Hurricane was one of the most destructive and powerful storms ever to strike southern New England. The storm roared ashore over Long Island, NY at nearly 60 mph at the time of high tide. This created a deadly tidal surge, which submerged downtown Providence, RI under 20 feet of water. Hurricane force winds were felt throughout New England, with a gust to 186 mph at the Blue Hill Observatory in Milton, MA. The Great New England Hurricane of 1938 was responsible for over 500 deaths.

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August 15, 1886:

A tornado moved northeast from 5 miles southwest of Newark in Marshall County, through town and into North Dakota. Only three buildings were reportedly undamaged at Newark, and a bartender at a saloon was killed. Three people died in two homes on adjoining farms 2 miles southwest of town. A saddle from a Newark stable was carried for a half mile. In North Dakota, homes and barns was damaged along the Wild River. This tornado was estimated as an F3.

August 15, 1987:

On this day the largest hail stone was reported in Brown County. The size of the hail stone as 4.5 inches in diameter, and fell on the southwest corner of Warner. This storm also produced F1 tornado that touchdown about 2 miles southwest of Warner. An estimated wind gust of 60 mph was also reported about 2 miles NNW of Stratford.

August 15, 2011:

Slow moving thunderstorms across parts of northern Roberts County produced anywhere from 4 to 8 inches of rainfall resulting in flash flooding. The town of New Effington was affected with many roads along with several homes flooded. Sandbagging took place to keep the water from the school. Highway 127 from New Effington to Hammer was flooded in several spots. This was the second time that New Effington was flooded in the last month. The floodwaters remained for several days afterward with several roads flooded.


Record Highs: Record Lows:
Aberdeen: 111 (1937) Aberdeen: 42 (1895)
Kennebec: 114 (1937) Kennebec: 46 (1994)
Mobridge: 106 (1988) Mobridge: 46 (1942)
Pierre: 114 (1988) Pierre: 52 (2005)
Sisseton: 106 (1937) Sisseton: 39 (1979)
Timber Lake: 107 (1988) Timber Lake: 46 (1942)
Watertown: 102 (1937) Watertown: 44 (1929)
Wheaton: 101 (1922) Wheaton: 42 (1929)

Record Precipitation:
Aberdeen: 1.04" (1967)
Kennebec: 1.83" (1944)
Mobridge: 1.55" (1978)
Pierre: 1.64" (2009)
Sisseton: 2.75" (2011)
Timber Lake: 2.55" (1978)
Watertown: 1.71" (1951)
Wheaton: 1.38" (1940)


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