Marginal risk of severe thunderstorms today, generally north of Interstate-80

This is an archived article and the information in the article may be outdated.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 the portion of the Chicago area generally north of Interstate-80 in a Marginal Risk of severe thunderstorms today and tonight (dark-green-shaded area on the highlighted map depicting a 5% chance of severe storms within 25 miles of a given location). The main risk will be damaging winds – isolated large hail is possible. A weak frontal boundary along the Illinois-Wisconsin border combined with anticipated on-shore easterly winds developing could combine to trigger a few strong thunderstorms over our area, mainly north of Interstate-80 this afternoon/early evening. Note the center of severe storm activity is to our west and northwest with a Slight to Moderate Risk of severe storms over portions of Minnesota, the eastern Dakotas, eastern Nebraska and western Iowa.

Tomorrow, Wednesday, a setup conducive to more widespread strong to severe thunderstorm development during the afternoon into the overnight hours will exist here. As a result almost the entire Chicago area has been outlooked for a Slight Risk of severe storms (see yellow-shaded area on the Wednesday/Wednesday night severe weather outlook map below depicting a 15% chance of severe storms within 25 miles of a given location.

Severe weather outlook for Wednesday/Wednesday night…