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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June 21, 1902:

Light to heavy frost occurred over most of the state with low temperatures ranging from the mid 20s, to the lower 30s. Some record low temperatures include; 27 degrees in Ipswich and Leola, 29 in Kennebec, 30 in Mellette, 31 in Aberdeen, Clark, and Watertown, 32 in Faulkton and Gann Valley, 36 in Sisseton, and 40 degrees in Milbank.

June 21, 1956:

Barns, granaries, outbuildings and an airplane were destroyed northwest of Conde. This was caused by an estimated F2 tornado.

June 21 1961:

One or more tornadoes moved southeast along a distance from east of Aberdeen to the southeastern edge of Sioux Falls. A funnel cloud was first seen between Aberdeen and Groton and later on near Raymond. A tornado hit about 4 pm a few miles southwest of Clark with about 20 farm buildings demolished. One house was destroyed, killing an elderly lady and injuring one person. A boy was reportedly lifted high in the air and another woman carried 100 yards by winds. Both were injured. Between 4:30 and 5:00 pm, areas northeast of Willow Lake and in northern Kingsbury were hit with a total of 13 farm buildings destroyed or twisted off the foundations. Five buildings on one farm were destroyed and a house was unroofed near Oldham. The house roof was found several miles away. The tornado was of F3 strength.

June 21, 1962:

Hail, some as large as baseball size, but mostly golf ball size or smaller was observed between Bristol and Webster. Crop loss ranged from severe to light. Hail was 6 inches deep in some areas. A road grader was used to clear the road.

June 21, 1983:

An F3 tornado touched down at a resort area two miles west of Pollock. Eleven people fled the southwestern most cabin and crawled under a nearby cabin. The southwest cabin was completely destroyed and the cabin the group crawled under was moved five feet from its concrete block foundation. Four people were treated for injuries. A van, boat and trailer were demolished and a small car was heavily damaged. The tornado turned east and reformed four miles east of Pollock, where it touched down briefly and dissipated. Another F3 tornado touched down in open prairie three miles northeast of Glad Valley and moved northeast, creating a path of destruction as it progressed. On one farm, nine buildings were wiped out and scattered up to two miles away. Trees and poles were uprooted and scattered a half mile away. This tornado was estimated to be on the ground for six miles with a path width of 300 yards. A third tornado, rated F2, touched down seven miles south of Pollock. This tornado damaged several cabin roofs, a restaurant, and downed several trees. Boats were tossed in a lake and picnic tables were hurdles against cars.

June 21, 1995:

Numerous slow moving thunderstorms produced very heavy rains across north-central South Dakota from early morning to the early evening hours of the 21st, and again from early morning to the early afternoon hours on the 22nd. The two day rainfall amounts ranged from two to nearly seven inches across north-central South Dakota. Some rainfall amounts included; 2.12 inches at Gettysburg; 2.20 at Hoven; 3.33 at Roscoe and Eureka; 3.50 at 2.5W Bowdle; 3.60 at Trail City; 3.77 at Herreid; 4.00 at Firesteel; 4.45 at Bowdle; 4.50 at 20NW of Gettysburg; 5.06 at 9NE Timber Lake; 5.45 at Timber Lake; and 6.80 at 7NW Trail City. Many roads were flooded and closed. In the Timber Lake, Firesteel, and Isabel area, flooding washed gravel off the roads in 40 to 50 places. Some crops were also flooded. A bridge was washed out on the Dodge draw road just off U.S. Highway 83.

June 21, 2013:

A long-lived severe thunderstorm developed over the southern Black Hills and moved eastward across the South Dakota plains during the morning hours. The storm produced very large hail to softball size from eastern Custer to northern Jackson Counties. The softball size fell 12 miles east-southeast of Fairburn in Custer County, damaging property. This storm intensified along a strong warm front with very unstable air and strong deep layer winds into several supercell thunderstorms and a damaging line of thunderstorms/bow echo across parts of central and northeast South Dakota through the afternoon hours. Damaging winds up to 90 mph uprooted large trees and caused considerable structural and crop damage and loss of power to those along the path. The worst wind damage was located at Lake Poinsett, Watertown, and Milbank. A woman was killed and her husband was seriously injured on Lake Poinsett when their lake house was destroyed. Numerous trees were downed along with many structures damaged or destroyed. Many trees had fallen onto homes, cabins, and trailers. The bowling alley in Clear Lake lost its roof along with numerous pole barns being destroyed along the path of the storm. Thousands of people were also left without power. Four tornado touchdowns occurred along with hail up to the size of softballs. Isolated flash flooding also occurred. Codington, Hamlin, Grant, and Deuel counties were all declared in a Federal Disaster Declaration. Total damage estimates were around 1,100,000 dollars.


Record Highs: Record Lows:
Aberdeen: 108 (1988) Aberdeen: 31 (1902)
Kennebec: 108 (1988) Kennebec: 29 (1902)
Mobridge: 102 (1988) Mobridge: 43 (1972)
Pierre: 108 (1988) Pierre: 43 (1972)
Sisseton: 101 (1988) Sisseton: 36 (1902)
Timber Lake: 102 (1988) Timber Lake: 40 (1969)
Watertown: 105 (1988) Watertown: 31 (1902)
Wheaton: 96 (1988) Wheaton: 39 (1917)

Record Precipitation:
Aberdeen: 1.85" (2011)
Kennebec: 1.75" (2011)
Mobridge: 1.72" (1957)
Pierre: 2.19" (2002)
Sisseton: 1.96" (1941)
Timber Lake: 3.58" (1995)
Watertown: 2.61" (1956)
Wheaton: 2.98" (1941)


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