From NWS
1987: Thunderstorms produced very heavy rain across about the southern half of Iowa from August 24th into the early morning hours of the 26th, with 5 to 7 inch accumulations common in a broad swath from around Glenwood and Red Oak east northeastward to Maquoketa and the Quad Cities. The highest reported storm total rainfall amounts included 6.41 inches at Belle Plaine, 7.06 inches at Osceola, 8.12 inches at Corning, 9.07 inches at Red Oak, and 10.50 inches at Stanton in Montgomery County. Extensive flooding occurred across southern Iowa.

Posted under Weather History