Flash Flood Watch Is In Effect Through Sunday Night

Flash Flood Warning Sept. 21
Photo credit National Weather Service Chicago

CHICAGO (WBBM NEWSRADIO) -- A flash flood watch is in effect for north central and northeast Illinois, including in Cook and Will counties, from 7 p.m. Saturday through Sunday evening.

The National Weather Service Chicago reported that widespread showers and thunderstorms capable of producing heavy rainfall, with rates approaching 1.5 to 2 inches per hour are expected to develop Saturday evening into Sunday.

When heavy amounts of rain fall in short periods of time, particularly in areas that already have been hit by recent heavy rain, flash flooding can occur, meteorologists said.

Rainfall totals of 2 to 4 inches, with locally higher amounts, are possible by Sunday evening. The rain will likely lead to more river rises this week, according to NWS, especially across the Des Plaines, Fox, Pecatonica and Rock river basins.

A flash flood watch means that conditions may develop that lead to flash flooding.

Flash flooding is a very dangerous situation. Residents are advised to monitor later forecasts and be prepared to take action should warnings be issued.