National Weather Service United States Department of Commerce

Significant and Catastrophic Flooding in the Pacific Northwest; Very Cold Temperatures in the Northern Plains

The atmospheric river over the Pacific Northwest will begin to subside today, but lingering rainfall will exacerbate ongoing catastrophic major river flooding, and landslides will continue across portions of western Washington and northwest Oregon for several days. Arctic air will plummet southward into the Northern Plains today, bringing cold air in the single digits to the region by Friday. Read More >

Overview

  • During the afternoon of Sunday, March 26, numerous thunderstorms developed across parts of northern Illinois, eventually tracking into northwest Indiana.

  • Some of these storms became severe, particularly those that tracked eastward along a stationary frontal boundary located near the I-80 corridor. 

  • Most of the storm reports received were for hail with numerous reports of hail to the size of peas to nickels. In some instances, hail fell heavily enough to cover the ground. The largest reported hailstones were the size of half dollars (1.25" in diameter). 

  • Thank you to all who provided real-time storm reports and information!
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Additional recaps can be found on the NWS Chicago Past Events Page
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