National Weather Service United States Department of Commerce

Cold Front Dropping South Across the Western U.S.; Watching Threat for Tornadoes and Flooding in the South

A cold front will push south across the Western U.S. into Tuesday with mountain snow and areas of gusty to high winds. An area of low pressure will form along this front on Tuesday and bring a potential for severe thunderstorms with tornadoes and excessive rainfall in the lower to mid Mississippi River Valley. To the north, heavy snow is possible in parts of the upper Midwest. Read More >

Overview

The period from August 12th-20th was a wet one across much of the region, with numerous rounds of thunderstorms with efficient rainfall rates.  Of particular note were the following dates:

  • August 12:  After morning storms, evening storms produce 2" to 5" along and just north of the I-55 corridor.
  • August 15:  Heavy rainfall of up to 3" to 5" in east central Illinois and northwest Indiana.
  • August 18 (early morning):  Dixon area sees 3" to 5+" of rain in the early morning hours.
  • August 18 (afternoon and night):  Parts of east central Illinois and northwest Indiana see 2" to 4" of rain.
Rainfall
August 7th-20th Rainfall
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