Flash Flood in Marshall County, Illinois

Torrential rainfall of 4.00 to 8.00 inches resulted in damage to about 2,000 houses and businesses in the county, including several in the cities of Henry and Lacon. Every creek and stream in the county was flooded. Every road in the county was impassable, and several water rescues were made. Numerous roads and culverts were damaged by the flash flooding.

A nearly stationary frontal boundary interacting with an unseasonably warm and moist airmass brought widespread showers and thunderstorms to parts of central Illinois from the later afternoon of April 17th through the morning of April 18th. Several rounds of thunderstorms impacted west-central and central Illinois producing torrential rainfall and major flash flooding along and west of a Rushville to Minonk line. Rainfall totals ranged from 5 to 8 inches across most of this area. In addition, periodic severe thunderstorms produced large hail and damaging winds.