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Enhanced Risk for Severe Thunderstorms Across the Upper Midwest; Flash Flooding Possible from the Upper Midwest to Southern Plains and Desert Southwest Through Friday

Portions of the Upper Midwest will see an increased threat for severe thunderstorms through this evening, with a few strong tornadoes possible. The same region remains on alert for additional flash flood concerns. Heavy rainfall may lead to flash flooding across the Desert Southwest today, and Southern Plains by Friday. Finally, Major-to-record river flooding continues across the Carolinas. Read More >

On This Day In

                   Weather History

December 18th

Local and Regional Events:

December 18, 1985:

On one of the coldest mornings of the year, most places in South Dakota experienced low temperatures of less than 20 degrees below zero. The coldest temperature was 30 below zero at Huron in Beadle County and Canton in Lincoln County. Aberdeen dropped to 22 below zero, Highmore and Mobridge fell to 23 below zero; Britton fell to 24 below zero, and Summit bottomed out at 25 below.


December 18, 1996:

A powerful Alberta Clipper and a slow-moving deep Arctic high-pressure system brought widespread prolonged blizzard conditions to the entire region from the 16th to the 19th. The clipper dropped from 1 to 5 inches of snowfall on top of the already extensive snow cover of 1 to almost 4 feet. Across central and north central South Dakota, northerly winds increased to 25 to 40 mph with gusts to 55 mph late in the morning of the 16th. Temperatures also fell, and widespread blizzard conditions and dangerous wind chills of 40 to 70 below zero developed, prevailing through noon on the 18th. Across northeast South Dakota, conditions changed through late in the day of the 16th, with widespread blowing snow, falling temperatures, and dangerous wind chills. Widespread blizzard conditions developed on the morning of the 17th and continued into the evening of the 18th. Conditions changed throughout the afternoon of the 16th in west central Minnesota, with a full-fledged blizzard by the morning of the 17th.

North winds of 30 to 40 mph gusting to 50 mph brought visibilities to near zero and caused heavy drifting, making travel difficult. Many people had to be rescued from their vehicles after getting stuck in massive snowdrifts or going into ditches because of low visibilities. Some people had to wait to be rescued for many hours, for some over a day. Due to the massive amount of blowing snow, widespread heavy drifting occurred across the entire area, blocking roads, making travel difficult, and leaving some people stranded to wait out the storm. Some snowdrifts from the storm were as high as 15 feet with a few houses almost buried. A Burlington Northern locomotive became stuck in a 12-foot drift near Hazel and had to be dug out. Due to the weight of the snow, the roof of a hanger at the Gettysburg Airport collapsed on an airplane.

All schools were let out early on the 16th with some schools not reopening until the 20th. Several school buses went into the ditch or got stuck in drifts and had to be pulled out. There were several accidents, most with minor injuries; however, one accident in Dewey County resulted in serious injury. Most of the roads, state highways and Interstate 90 were closed for a day or two until road crews could get to them. Interstate 29 also received heavy drifting, with parts of it closed for a while during the storm. Most snow plows had to be called back because they could not see the roads or the roads would be drifted over shortly after they were plowed. Some county snow removal budgets were already depleted or were close to being consumed. Emergency personnel and road crews were working extended hours to keep up with the storm. Rescue vehicles had a difficult time responding to emergencies. In one case, a lady from Mobridge had to be brought to Aberdeen. The 100-mile trip took six hours. Also, a rural Westport man died because the rescue units could not get to him in time.

Airports were closed or flights were canceled or delayed. Mail was delayed for some people up to several days with a massive backup of Christmas packages. Some government offices and many businesses were closed for several days. All sports and other activities were postponed or canceled. Farmers and ranchers had a difficult time getting feed to their livestock. Many cattle were loose and had to be found as they walked on snow drifts over fences. The storm also killed several animals and a countless number of pheasants with some buried in the snow. Several dairy producers had to dump thousands of pounds of milk because trucks could not get to them in time. Fortunately, there were only spotty power outages throughout the storm. For several hours on the night of the 16th in the extreme cold, 3000 people in Pierre were without power for several hours.

U.S.A and Global Events for December 18th:

December 18, 1944:

Typhoon Cobra, also known as the Typhoon of 1944 or Halsey's Typhoon (named after Admiral William "Bull" Halsey) was the United State Navy designation for a tropical cyclone that struck the Task Force 38 in the during World War II in the Pacific. The typhoon was first observed on December 17 as it surprised a fleet of ships in the open waters of the western Pacific Ocean. Sustained winds associated with the storm were up to 100 mph with gusts to 140 mph. On December 18, the small but violent typhoon hit the Task Force while many of the ships were attempting to refuel. Due to the extreme seas and 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 officers and men were lost or killed with another 80 injured. This storm inflicted more damage on the Navy than any storm since the hurricane at Apia, Samoa in 1889. In the aftermath of this deadly storm, the Pacific Fleet established new weather stations in the Caroline Islands and, as they were secured, Manila, Iwo Jima, and Okinawa. Also, new weather central offices (for coordinating data) were established at Guam and Leyte.

File:Typhoon Cobra, 18 December 1944 east of Luzon.jpg

The structure of a typhoon was captured by a Navy ship's radar on December 18. This storm was the second tropical storm ever to be observed on radar East of Philippine Islands.

File:USS Langley (CVL-27) and battleship in typhoon 1944.jpeg

The U.S. Navy light aircraft carrier USS Langley (CVL-27) rolling heavily during Typhoon Cobra, 18 December 1944. A battleship is steaming behind the carrier. U.S. Navy (the image is part of an album of photographs collected by Captain Carlos W. Wieber during his command of the aircraft carrier USS Essex (CV-9) during 1944-1945).

File:USS Cowpens (CVL-25) during Typhoon Cobra.jpg

A view of USS Cowpens (CVL-25) starboard side flight deck facing aft from the island. The photo was taken at the time Typhoon Cobra hit the Third Fleet on 18 December 1944.

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