This Day in National/World Weather History ...
 1 August 1674 → A strong tornado struck Utrecht, Netherlands. It damaged several churches and almost all of the town's windmills.
 1 August 1983 → A thunderstorm at Andrews AFB in Maryland produced a microburst wind gust of 149 mph. Air Force One with President Reagan aboard had landed there just 10 minutes earlier.
 1 August 1986 → A powerful thunderstorm produced 100 mph winds and large hail in eastern Kansas and southwestern Missouri causing 71 million dollars damage, and injuring 19 persons. Crops were mowed to the ground and roofs were blown off buildings along its path, 150 miles long and 30 miles wide, from near Abilene to southeast of Pittsburg.

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July 31, 1966:

A deadly, estimated F3 tornado moved southeast, passing south of Ashley, North Dakota, destroying buildings on five farms with near F4 damage to one farm house. Another tornado with F2 strength occurred north of Long Lake where two adults were killed and three children were injured as a car was thrown 500 feet from Highway 101. A second estimated F2 tornado moved ENE just south of Aberdeen. A trailer was demolished, killing a man and injuring his wife. Seven airplanes were also had damage. Property damage was estimated at a quarter million dollars. An estimated 90 mph winds gust was also reported northeast of Aberdeen.

July 31, 1987:

The second deadliest tornado in Canadian history occurred in Edmonton, Alberta. An F4 tornado killed 27 people, injured over 300, and caused a quarter of a billion dollars in damage.

July 31, 2008:

In the early morning hours of the 31st, a line of storms originating in North Dakota began to expand and surge southeast into northeast South Dakota. As the storms moved southeast, they began to tap into warmer, more humid air and rapidly evolve into a line of severe thunderstorms. Widespread damage occurred in a wide swath extending from Long Lake in McPherson County all the way into eastern Grant County and southern Big Stone County in Minnesota. The most extensive damage was generally found along and near US Highway 12 from Aberdeen to Milbank. Several observing stations in the path of this system measured wind speeds ranging from 70 mph to over 115 mph. Estimated wind speeds from damage surveys indicated even stronger winds with peak speeds of 120 mph. Over fifty communities in northeast South Dakota and the surrounding rural areas received minor to major tree and structural damage as straight line winds from 70 to 120 mph raced across the area. Webster and Waubay received the most extensive damage from the storms. Thousands of trees were snapped or uprooted, hundreds of grain bins were damaged or destroyed, hundreds of homes, businesses, and outbuildings were damaged or destroyed along with many power poles and miles of power lines downed. Many mobile homes, campers, and boats were damaged or destroyed along with many road and business signs. Countless homes, vehicles, and campers were also damaged by fallen trees. Thousands of acres of crops were also damaged or completely destroyed by the winds and hail. The greatest crop damage occurred in the Roslyn, Grenville, Eden, and Pickeral Lake areas in Marshall and Day counties. Many acres of corn were blown down and not able to come back. The large hail combined with the strong winds also broke out countless windows in homes and vehicles along with damaging the siding on homes. Thousands of people were left without power for up to several days. Large hay bales were moved up to 700 yards by the high winds. A semi was overturned on Highway 12 near Webster, injuring the driver. Near Milbank on Highway 12, two other semis were blown off the road resulting in injuries to both drivers. A State Forestry Specialist said it was one of the worst tree damage events he has ever seen in the Webster area. A fifty-eight year old man died two miles north of Waubay during the cleanup after the storms when he was pinned between a backhoe and a tree.


Record Highs: Record Lows:
Aberdeen: 106 (1987) Aberdeen: 42 (1903)
Kennebec: 109 (1955) Kennebec: 41 (1971)
Mobridge: 103 (1955) Mobridge: 48 (1948)
Pierre: 108 (1988) Pierre: 50 (1968)
Sisseton: 105 (1987) Sisseton: 48 (1952)
Timber Lake: 107 (1946) Timber Lake: 46 (1913)
Watertown: 104 (1988) Watertown: 41 (1903)
Wheaton: 104 (2006) Wheaton: 45 (1971)

Record Precipitation:
Aberdeen: 0.97" (1917)
Kennebec: 1.35" (1997)
Mobridge: 0.88" (1975)
Pierre: 1.06" (1959)
Sisseton: 1.77" (2008)
Timber Lake: 0.62" (1993)
Watertown: 0.87" (1940)
Wheaton: 1.43" (1944)


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