Risk of severe thunderstorms shifted east to cover a good portion of the Chicago area tonight
Update 10PM CDT…
Showers and thunderstorms have developed in eastern Iowa and tracking east – crossing the Mississippi River and headed into the Chicago area. Also a line of thunderstorms has moved southeast out of Minnesota across SW Wisconsin – approaching our area from the NW. As a result, showers and thunderstorms, some strong and a few possibly severe will move across the Chicago area, eventually passing through Chicago into NW Indiana. Greatest threat from the strongest storms will be damaging winds and heavy localized flood-producing downpours.
Latest Weather radar mosaic…
The National Storm Prediction Center has updated the severe thunderstorm outlook to include a good portion of the Chicago area in a Slight Risk for severe thunderstorms this evening into the overnight hours (see yellow shaded area on the headlined severe thunderstorm outlook map). The main risk will be damaging winds and large hail, but heavy downpours in strongest storms could cause some localized flooding.
With a warm moist southerly flow of unstable air into Missouri/Iowa along with a storm-triggering disturbance aloft, strong to severe storms are expected to develop over Missouri/Iowa this afternoon and move east crossing the Mississippi River – tracking across Illinois. Timing of storms well after the peak-heating hours may help diminish the chances of severe storms here.