You probably noticed a difference in the air Tuesday afternoon. It felt a little warmer, a little more humid - didn't it? Heat index values were in the low to mid 90's across northern Illinois and southern Wisconsin Tuesday afternoon. And the abundance of moisture will help fuel a few thunderstorms later this evening and overnight. Nothing severe is expected, but heavy rain producing showers will move in between 9pm and 10pm, a little sooner west of Rockford.
Closer to home the humidity will be on the rise, but it won't get that hot. The reason - anticipated showers and thunderstorms. Heavy rain