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Cold Front Moving Through the Northeast U.S. Monday; Atmospheric River to Impact the Pacific Northwest Midweek

A cold front will cross the Great Lakes and Northeast U.S. through Monday with gusty winds and areas of rain showers. A strong atmospheric river is expected to move into the Pacific Northwest by midweek bringing a threat for moderate to heavy rainfall, gusty winds, and mountain snows for parts of Washington, Oregon, northern California, and the Sierra Nevada. Read More >

Fast Facts:

  • Shortly after 2 PM on Sunday, August 28th, strong to severe thunderstorms rolled across portions of northern Illinois. 
  • These storms were aided by a "Mesoscale Convective Vortex", which is a term referring to an area of low pressure aloft that is reinforced or augmented by earlier convection. 
  • These thunderstorms produced scattered wind damage, with somewhat more concentrated swaths of damage and heavy rainfall occurring across central DeKalb County. 
  • Storms exited the region through the mid evening hours, though another round of severe storms was experienced across part of the region the next day, Monday, August 29th. 
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Summary of severe weather and heavy rain reports
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Additional recaps can be found on the NWS Chicago Past Events Page
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