This Day in National/World Weather History ...
 18 December 1944 → The ships of the US Navy Task Force 38, seven fleet and six light carriers, eight battleships, 15 cruisers, and about 50 destroyers were operating about 300 miles east of Luzon in the Philippine Sea. A small but violent typhoon overtook the task force with relatively little warning. Many of the ships were caught near the center of the storm and buffeted by extreme seas and hurricane force winds. Three destroyers capsized and went down with practically all hands, while a cruiser, five aircraft carriers, and three destroyers suffered serious damage. Approximately 790 men were lost or killed. Fires occurred in three carriers when planes broke loose in their hangars and 146 planes on various ships were lost or damaged beyond economical repair by fires, impact damage, or by being swept overboard.
 18 December 1957 → An unusually late tornado outbreak for the time of year for so far north struck Missouri and Illinois. 18 tornadoes were rated F2 or greater. An F4 ripped through Jackson, Williamson, and Franklin counties in Illinois. Murphysboro was hard hit with 10 people killed. Sunfield, IL vanished completely as an F5 tornado swept it clean.

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July 17, 1985:

An F1 tornado touched down, ten miles east of Raymond, destroying two cattle sheds and damaged several buildings. A garage was moved off its foundation. Heavy rains, strong winds and hail up to 2.75 inches in diameter produced considerable damage to farm buildings between Raymond and Garden City. Rainfall amounts of three to six inches caused additional crop losses from erosion. In the city of Clark, some basement flooding occurred and water ran across Highway 212 west of Clark. Some storm total rain fall amounts include; 3.77 inches in Clark; 3.15 in Clear Lake; 2.85 in Redfield; and 2.31 inches in 3 miles NE of Raymond. This thunderstorm began near Kennebec where winds gusted to 80 mph and small hail was observed. A few trees were uprooted and numerous branched were downed. Several car windows were broke from wind and small hail. A half inch of rain fell in ten minutes, filling ditches. Strong winds continued into Spink County were extensive damage was done to a farm estate east of Redfield. Heavy rains of three to five inches caused road and basement flooding. A damage path from wind and hail continued to Clear Lake, to south of Gary and into Minnesota to the east of Canby. Winds gusted to 70 mph and hail ranged from one to almost two inches in diameter. In Clear Lake, four businesses were damaged and power poles were downed. One building had the fiberglass siding and roofing torn off. A second building had a metal roof blown off. Highway 77, south of Clear Lake was impassable due to hail on the ground.

July 17, 1993:

Heavy rains of three to seven inches fell in Grant County resulting in the overflow of Lake Farley into the city of Milbank. The dam held, but an emergency dike broke on the evening of the 17th releasing water into residential streets and a trailer court in Milbank. This forced evacuation of at least 200 people. Damage included 120 mobile homes and 26 houses being affected by floodwaters. In addition, a man died when his pickup truck hit a wash out on a gravel road south of Milbank and was swept into the floodwaters of a nearby creek.

July 17, 2008:

Several supercell thunderstorms moving southeast across the region brought very large hail up to softball size along with damaging winds to parts of northeast South Dakota. Numerous homes, vehicles, along with thousands of acres of crops were damaged. Hail up to the size of softballs occurred near Westport. Golf ball to baseball size hail fell at the National Weather Service office causing damage to several vehicles. The rear window was broken out of one of the vehicles. A supercell thunderstorm tracking southeast across Clark county produced anywhere from quarter to baseball size hail along with wind gusts over 70 mph from Crocker to Clark to Naples to Vienna. The large hail and winds caused extensive damage to homes, outbuildings, vehicles, and thousands of acres of crops. Many trees and gardens were also damaged or destroyed by the hail and high winds. The storm entered western Hamlin County. Winds measured over 90 mph in Hayti along with some large hail broke numerous windows out of several homes and vehicles, damaged several roofs, and downed many trees. A concrete silo was also destroyed. The highway shop lost half of its roof along with severe damage to the roof of a trucking business in Hayti.

Record Highs: Record Lows:
Aberdeen: 111 (1936) Aberdeen: 44 (1895)
Kennebec: 114 (1936) Kennebec: 40 (1906)
Mobridge: 110 (1936) Mobridge: 46 (2009)
Pierre: 109 (1936) Pierre: 48 (2009)
Sisseton: 101 (1932) Sisseton: 48 (1937)
Timber Lake: 109 (1936) Timber Lake: 44 (2009)
Watertown: 103 (1936) Watertown: 38 (1899)
Wheaton: 101 (1932) Wheaton: 44 (1924)

Record Precipitation:
Aberdeen: 3.09" (1947)
Kennebec: 1.10" (1985)
Mobridge: 1.00" (1942)
Pierre: 1.77" (1969)
Sisseton: 1.64" (1944)
Timber Lake: 0.50" (1999)
Watertown: 1.71" (1969)
Wheaton: 1.20" (1928) is the U.S. government's official web portal to all federal, state and local government web resources and services.