National Weather Service United States Department of Commerce

Overview

Heavy rain-producing showers and thunderstorms prevailed across much of the area the evening of August 11 and early morning of August 12.  Widespread rainfall totals of 2 to 5 inches were common across east central and southeast Iowa and northwest Illinois, with some higher amounts of 5 to 7 inches within 20 miles of a line from Cedar Rapids to Davenport. Flash flooding resulted in Marengo, Iowa where streets were covered with flood waters between 12 and 18 inches deep. In addition, several streams, creeks and tributary rivers saw water levels rise quickly, with some flooding out of their banks. Meanwhile, parts of west central Illinois southeast of a line from Keokuk and Macomb received little if any rain overnight. As of 7 am August 12, low temperatures were between 70 and 73 area-wide.
 

Radar Surface Loop Image

Heavy rains continued further to the east August 12 and 13.

8/12 - 8/13 Summaries:

Surface and Radar Loop
1pm 8/11 to 10am 8/12
Radar Rainfall Estimate  
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