Renewed risk of severe thunderstorms across the Chicago area again this Thursday afternoon/evening into the overnight hours

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.

The National Storm Prediction Center has most of the Chicago area under a Slight Risk (yellow-shaded area on the highlighted Thursday-Thursday night map) of severe thunderstorms this afternoon and tonight with a Marginal Risk of severe storms Friday (dark-green-shaded area on highlighted map and Friday severe weather outlook second map below). The primary risk will be for damaging winds and hail along with flood-producing downpours (note on the first map below much of the Chicago area is positioned in the Slight Risk of Excessive Rainfall for this afternoon/tonight).

By this afternoon the warm humid unstable air mass will be reestablished overhead with gusty southwest winds. During the peak-heating hours temperatures will warm into the middle 80s with dewpoints in the upper 60s. An upper-air disturbance is forecast to move through from the west late in the afternoon into the overnight hours triggering another round of strong to severe storms across northern Illinois.

Friday a cold front that has been poised to the northwest will sweep through during the afternoon preceded by strong to potentially severe storms, primarily during the late morning into the early/mid afternoon. Showers/thunderstorms will be ending from the west during the afternoon/early evening Friday as the cold front moves on east.

Thursday/Thursday night Excessive rainfall outlook map…

Day 1 Excessive Rainfall Forecast

Friday severe weather outlook map…