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Severe Weather in the Plains; Heavy Rainfall in the Northern Plains, Tennessee Valley and Southeast

Numerous severe thunderstorms with a potential for 60-80 mph winds, along with tornadoes (some strong), and large to very large hail are expected across the northern and central Plains through tonight. Heavy to excessive rainfall may bring a flooding threat to parts of North Dakota and Minnesota, and from the Ohio Valley to the Southeast through tonight. Read More >

Overview

Overview
Event Overview Summary
Overview
Event Rainfall Summary

Showers and thunderstorms developed late in the day on Aug 27th in northeast Missouri and spread into southeast Iowa and far western Illinois into the evening. Large hail fell for nearly one half hour straight in Rutledge, MO, including as large as golf ball size.

A pronounced downburst (sudden rush of wind under and near a thunderstorm) caused widespread damage in Burlington, IA knocking down trees, limbs, and powerlines. Five homes had holes in the roofs due to falling limbs. A commercial storage building had a partial roof collapse and another large tall outbuilding had partial roofing peeled back, consistent with wind estimates of 70 to 80 MPH. 

Rainfall totals of 2 to 4 inches were observed in parts of northeast Missouri and southeast Iowa. 

Oppressive heat and humidity that began on the 26th and persisted into the 27th helped spawn these storms. Both Dubuque (tied) and Moline (exceeded) daily record highs on the 27th, with Moline reaching 98° and Dubuque 94°.

For more on north central and northeast Illinois, see this August 26-27 summary from NWS Chicago.

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NWS Quad Cities, IA/IL Event Summary List

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