A tornado watch is in effect in NW Indiana until 9 p.m. Showers and thunderstorms are possible for the rest of the viewing area.
The governor of Illinois is getting out ahead of a potential disaster.
Quinn activated the Illinois National Guard to help fight flooding in Southern Illinois.
More than 120 guardsmen will travel to the town of Marion to help with emergency planning for an expected flood.
Meanwhile, Northwest Indiana is preparing for an evening tornado.
The national weather service has issued a tornado watch for parts of Northwest Indiana that will last until 9 p.m.
Last time the guard was deployed for a natural disaster came when Quinn sent them to Chicago to deal with the blizzard in February.