Rain will develop across the city and suburbs Wednesday afternoon, but the heaviest rain and best chances for thunderstorms will build overnight, ABC7 Meteorologist Tracy Butler said.
SEE MORE | ABC7 AccuWeather 7-Day Forecast
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In addition to cloud-to-ground lightning and heavy downpours, the National Weather Service said the strongest storms may produce hail up to 1 inch in diameter. That's large enough to dent the siding on your home.
The greatest threat for large hail appears to be along and south of the I-80 corridor in the south suburbs and northwest Indiana.
The ABC7 AccuWeather Team is also tracking slushy wet snow accumulations that are possible late Friday into Saturday.
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Stay tuned to ABC7 Eyewitness News and ABC7Chicago.com for the latest on the potential severe weather.