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 >


Fast Facts:

  • Chicago O'Hare received 2.36" of rain on August 7th, most of that impressively falling within one hour during the mid-afternoon.  Visibility dropped as low as 1/4 mile at ORD, very rare to do with rain only!
  • This was the highest official calendar day rainfall at Chicago (ORD) since October 14, 2017 (4.19").
  • This was the highest August calendar day rainfall since August 4, 2014 (2.76").
  • This produced flash flooding in parts of northern Cook County, including the north side of the city of Chicago.
  • Based on reports from media, there were some water rescues due to stalled vehicles under viaducts.
Radar Loop
Radar loop from 10am - 8pm CDT August 7th, 2018.
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Additional recaps can be found on the NWS Chicago Past Events Page
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