RSS FeedsHydrologic Summary for August 2002 for the Area Served by the NWS Forecast Office at Sioux Falls, SD
Summary
There was no river flooding in the area during August.
Flooding
There were several flash flood and urban flooding events in August. The first was in the Mitchell area when 3 to 4 inches of rain fell early in the morning of the 6th, flooding numerous roads. The Mitchell area was again hit with 2 to 4 inches of rain in the evening of the 20th. This thunderstorm complex then moved across the Sioux Falls area in the early morning hours of the 21st, resulting in urban flash flooding in the southern parts of the city, and flash flooding in the Beaver Creek area east of the Sioux Falls metro area. Another round of flash flooding occurred across northwest Iowa in the morning hours of the 22nd, again with several roads and creeks flooding.
General Hydrologic Information
Temperatures in August were near normal across the region. Precipitation for the month was above to much above normal. Most of the region received 3 to 5 inches, with some areas totaling 6 to 8 inches.
Stream flows at the end of August were near normal to slightly above normal. The long term drought indices showed near normal conditions in southeast South Dakota, northwest Iowa and southwest Minnesota, and slightly to moderately dry conditions in south central South Dakota as of the end of August.
Mike Gillispie
September 13, 2002
September 13, 2002
