Chicago (CBS) — Storms are expected to bring heavy rain and some thunder to the Chicago area beginning Wednesday night into Thursday morning.

Most of Wednesday will be cloudy, windy, and mild as we sit in the warm sector of the storm.

Severe weather is possible from 4 to 10 p.m. for DeKalb, Kane and McHenry counties from Dixon to Crystal Lake. Any storms that form would move to the northeast at 35 miles per hour. If storms develop, they could quickly become severe due to a huge surge in warm air.

As the main front approaches, the first line of thunderstorms will move in after dark.

Heavy rain and thunderstorms are expected overnight, especially along I-80 and to the south. Strong to severe storms are possible after 3 a.m. These will also move northeast at 35 miles per hour.

Temperatures will fall throughout the day Thursday as the main front exits the area. Cooler winds will remain along with a few leftover showers.

The storms could bring a half an inch of rain or more to parts of the region.

FORECAST

Wednesday night: Evening storms, especially to the northwest. A second round south of I-80 will begin early Thursday morning. Low 53

Thursday: Thunder possible at daybreak, then leftover showers and falling temperatures. High 50

Friday: Mostly cloudy. High 51

Saturday: Sunny. High 63

Sunday: Building clouds, rain after dark. High 70.