Rain Showers and Gusty Winds Coming to the Mid-Atlantic; Remaining Unseasonably Warm in the Central U.S.

Low pressure will track slowly northwestward into the Mid-Atlantic region through midweek bringing a risk for excessive rainfall, gusty winds, shallow coastal flooding, rip currents, and large surf. Unseasonably warm to hot temperatures persist in the mid to upper Mississippi Valley and into the Great Lakes and Northeast U.S. through Thursday. Read More >

Heavy rains of 8 to 12 inches that occurred on July 22-24 along and north of the Highway 20 corridor between Waterloo, IA and Dubuque, IA resulted in record flooding on the Maquoketa River and Lake Delhi (also called Hartwick Lake). The pressure from the record river flood levels were too much for an earthen berm on the south side of the Lake Delhi/Hartwick Lake Dam. It gave way shortly after 1 pm July 24.

48 Hour Rainfall Totals Ending ~7AM July 24

Hydrograph of the Maquoketa River Level at Manchester Highway 20

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Rain Showers and Gusty Winds Coming to the Mid-Atlantic; Remaining Unseasonably Warm in the Central U.S.

July 22-24, 2010 Heavy Rain and Flooding