1993 was the wettest year on record with 36.10 inches at the airport. The first 6 months of 1984 also ranked right up there in one the wettest periods on record with record flooding west of Sioux Falls. Up to 125 mph winds destroyed many large trees in various microburst swaths from southwest to northeast in Sioux Falls. This caused the biggest fall flood in history on the Big Sioux River. The heaviest official rain event for Sioux Falls was 4.59 inches at the airport on Aug. 1, 1975.
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