by Mike Hamernik twitter.com/#!/MikeHamernik
The Storm Prediction Center is indicating a severe weather outbreak is possible this afternoon and evening over portions of the Midwest.
Thunderstorms that roll into Chicago this evening have the potential to produce damaging winds, large hail and nearly continuous lightning. In addition, a few tornadoes will be possible. The area most susceptible to tornadic thunderstorms will be just west of Chicago, over western Illinois, eastern Iowa and western Wisconsin.
BELOW: Areas highlighted below signify where the highest probability of a significant tornado will lie at 4PM (figure 1 at 2100z) and 7PM (figure 2 at 0000z).