While Groundhog Day remains a fun tradition, meteorologists rely on data and computer models for more accurate forecasts.

Heavy rainfall expected to move into the Chicago area Friday could raise area river levels, prompting a warning to conserve water from the Metropolitan Water Reclamation District of Greater Chicago.

During the morning hours, the Federal Aviation Administration warned that ground stops at both O'Hare and Midway International Airports were possible due to weather conditions.

Heavy rain and rumbles of thunder were expected throughout the Friday morning commute, the NBC 5 Storm Team said, with some slick spots expected and low visibility due to fog.

There is a risk of flooding and sewer backups Friday morning across the Chicago area as heavy rain will run off from frozen ...

Heavy rain and dense fog in the Chicago area today may cause flooding due to frozen ground, but conditions will improve by evening, with a mild and warmer weekend ahead.

Heavy rain is currently affecting parts of Chicagoland, leading to a Flood Watch for most of the area through 3 p.m. today.

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