...FLOOD WATCH IN EFFECT FROM 7 AM CDT THIS MORNING THROUGH LATE TONIGHT... * WHAT...Flooding caused by excessive rainfall is possible. * WHERE...Portions of north central Illinois and northeast Illinois, including the following counties, Boone, Ogle, Winnebago and McHenry. Including the cities of Algonquin, Belvidere, Woodstock, Rochelle, McHenry, Rockford, Byron, Oregon, and Crystal Lake. * WHEN...From 7 AM CDT this morning through late tonight. * IMPACTS...Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - Periods of moderate to heavy rain are expected through tonight. Rainfall totals of 2 to 4 inches are likely, with amounts in excess of 4 inches possible.