Storms Friday left several Chicago suburbs at risk of flash flooding.
A Flash Flood Watch was issued for portions of Illinois and northwest Indiana and remains in effect through late Friday evening. Counties included in the watch were Cook, DeKalb, DuPage, Grundy, Kane, Kankakee, Kendall, LaSalle and Will counties in Illinois and Benton, Jasper, Lake, Newton and Porter counties in Indiana.
The watch warns of "waves of thunderstorms," which could bring hourly rainfall rates of one to two inches or more at times.
A Flash Flood Warning was also in effect until 7:30 p.m. for central Livingston and south central LaSalle counties as thunderstorms began producing heavy rainfall.
Rain moved into the area late Friday morning and continued through the afternoon, but according to Storm Team 5 meteorologists, the more severe threat comes later in the day.
A Severe Thunderstorm Warning was issued for Grundy and LaSalle counties until 3:45 p.m.
That alert warns of a severe storm near Streator moving east at 55 mph. That storm brings with it quarter-sized hail, which could damage vehicles.
The storms are the result of a cold front moving in.
Potentially strong storms are expected to develop toward the end of the evening rush hour, continuing through much of the evening as they travel from northwest to southeast, weakening as they move.
These thunderstorms have the potential to be severe, packing wind gusts up to 60 mph, torrential downpours, flash flooding and a low threat of isolated tornadoes. The strongest threat for severe weather sits in areas west of Chicago.
The storms are expected to remain around the area through the midnight hour, dumping two or more inches of rain in some locations.
The remainder of the weekend could see more rain with a chance for showers and thunderstorms.
Meanwhile, temperatures are expected to drop into the mid-60s Saturday before rebound into the 70s again Sunday and back into the 80s for Monday.
This is a developing forecast. Check back for Storm Team 5 updates.