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Overview

​Several rounds of severe thunderstorms impacted the area on Sunday May 7, 2023, adding to an already busy weekend from storms the previous day.

The first round of storms evolved from a complex Sunday morning in Nebraska into northwest Iowa, which strengthened considerably as they encountered near- to record warm air across the area for early May. Plentiful instability and vertical shear were in place, allowing storms to grow and intensify quickly as they traversed the area. Two areas of storms were present during the mid-late afternoon, one entering the Cedar Rapids/Iowa City metros and another around the Burlington/Fort Madison metros. The first was the most severe, producing hail up to baseball size in Koszta, IA and widespread wind damage, especially around West Liberty, IA. This storm, and storms to the west, eventually merged into a cluster of severe thunderstorms producing large hail and destructive winds around 70-75 MPH all the way to Mount Pleasant IA and Macomb IL. The later, produced sporadic reports of quarter to half dollar size hail, along with a brief landspout tornado east of Yorktown, IL.

Additional storms developed to the northeast of this complex, stretching along and just north of Interstate 80 through north central Illinois. This mainly produced heavy rainfall and brief wind gusts, with some roads in northern Bureau County IL seeing water issues. There was also severe blowing dust which was especially bad near I-55 in north central Illinois.  

Even more thunderstorms developed overnight across the area, and mainly produced torrential rain and isolated large hail reports. Most notably, this complex of storms combined with the previous round produced a whopping 4.15" of rain in Le Claire, IA. Elsewhere, rainfall reports were mainly between 1” and 3”.

 

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May 7, 2023 Event Infographic.
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WPC Fronts/Radar Loop from May 7, 2023

 

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