Wednesday, June 21, 2017
Climbing Heat and Humidity Thursday
Highs Thursday will warm into the upper 80's, possibly low 90's, over northern Illinois and southern Wisconsin. With the warmth, a rise in humidity will also be felt as the heat index reaches the mid 90's for many. Other than a chance for an isolated shower/storm Thursday morning, it looks like most of the afternoon should remain dry - just hot. As a cold front moves down the Midwest from Minnesota and Wisconsin, thunderstorms will quickly develop in the warm and unstable air mass. A line of thunderstorms will be possible up north in Wisconsin during the late afternoon and evening. As the front sinks south, a wind threat could develop over southern Wisconsin and northern Illinois by late Thursday evening.