Live: All Hazards NOAA Weather Radio | Radar, satellite, and webcams
The Chicago area will go through a full season change over the next 5 days. Rain showers will push through the area tonight and winds will turn southerly that will boost higher humidity levels and slightly warmer than normal temperatures (low to mid 80s) on Wednesday.
The first two days (Thursday and Friday) to open the month of September will be unseasonably warm with a July-like airmass in place. High temperatures will climb into the lower 90s across northern Illinois and northwest Indiana with heat indices ranging from the mid 90s to near 100 degrees.
This atmosphere will increase the threat for thunderstorms both days. Of the two days, Friday appears the most threatening with several clusters of thunderstorms especially during the evening hours. The reason why Friday has a better chance for thunderstorms is because of slightly higher moisture and instability values in addition to a jet stream that will be closer to the region by then.
Saturday may be stormy as well with a couple of waves of thunderstorms. Storms that develop late Friday will probably carry over into the late night hours and into Saturday morning. A second wave is possible Saturday afternoon/evening depending on how well the atmosphere recovers. Cloud cover will likely hinder temperatures warming into the upper 80s/low 90s. High temperatures will be in the low to mid 80s.
A cold front followed by an upper level trough will result in a huge temperature fall across the Upper Midwest and Great Lakes region on Sunday. Temperatures will be at its highest during the first half of the day with falling temperatures in the afternoon and evening hours. Scattered showers will develop across the area.
Labor Day will be comfortable but probably the coolest in 8 years since 2003 with highs struggling to make it out of the 60s.
Be sure to check out my National Environmental News page for weather/climate related content and other environmental news.
Click on the “Subscribe” button above and enter your e-mail address to receive a free alert to your inbox when a new article is published by the Chicago Weather Examiner and/or the Chicago Snow Report Examiner. Follow us on Twitter! Become a fan of the Facebook page!