Scattered areas of heavy rain continue to produce isolated flash flooding across the Florida peninsula. Anomalous moisture will combine with a cold front and will bring heavy rain and scattered flash flooding across the Mid-South, Ohio and Tennessee Valleys today and Tuesday. Above average temperatures will continue to be found ahead of the cold front from the Midwest to the Northeast. Read More >
Overview
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On May 17th, 2018 storms initially formed along a boundary across parts of north central South Dakota. The slow moving storms trained along this boundary and produced significant flooding, large hail and gusty winds. Anywhere from 4 to 9 inches of rain has been estimated along a line extending from Selby, SD to Long Lake, SD. Many roads were over topped with water and barricades were setup. Several reports of basement flooding were noted. Additional wind producing storms developed over western South Dakota and moved along the I-90/Pierre area. Wind gusts ranging from 60 to 80 mph were reported. Damage included a semi truck tipped over, sheet metal blown off roofs and significant tree damage. The heavy rain also aided in the failure of the Hiddenwood Dam at Hiddenwood State Park about 4 miles northeast of Selby, SD during the early morning hours of May 18th, 2018. Water from that break resulted in significant overland flooding and many county and secondary roads went under water. |
 Flooding in Long Lake, SD. Photo courtesy of Sandy Chapman. |
Photos & Video:
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| Golfball Size Hail in Eureka, SD Courtesy of Keith Kramlich |
Floding in Eureka, SD Courtesy of Keith Kramlich |
Flooding in Long Lake, SD Courtesy of Sandy Chapman |
Hail in Long Lake, SD Courtesy of Sandy Chapman |
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| Wind Damage North of Eureka, SD Courtesy of Eric Odenbach |
Wind Damage North of Eureka, SD Courtesy of Eric Odenbach |
Flooding 15 Miles NE of Java, SD Courtesy of Ashley Schaefer |
Wind Damage near Onida, SD Courtesy of KCCR Pierre |
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| Wind Damage in Pierre, SD Courtesy of Leahandra Maria Ashley |
Wind Damage near Onida, SD Courtesy of KCCR Pierre |
Hiddenwood Dam Break Courtesy of Walworth County Sheriff |
Hiddenwood Dam Break Courtesy of Walworth County Sheriff |
Storm Reports
Radar estimated rainfall totals from https://water.weather.gov/precip/. Some of the more extreme measured totals range from 9 to 13+ inches of rain within 24 hours near the Long Lake, SD area.
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