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CHICAGO — Fast developing severe weather swept across portions of Illinois and Indiana Saturday and will continue into the evening.

A tornado warning has been issued for regions of the Far Southwest area of the Chicago metropolitan area, as well as Northwest Indiana.

The National Weather Service issued a Tornado Watch until 7 p.m. Saturday for Cook, DuPage, Grundy, Kankakee and Will counties in Illinois and La Porte, Porter and Jasper counties in Indiana.

A tornado was spotted on the ground in Crete, Illinois just after 2:05 p.m.

The storms have left power outages and service interruptions in their path, with 1,737 customers affected by NIPSCO outages in Northwest Indiana.

ComEd power outages have affected nearly 4,000 customers across the Chicago region as well, with 132 active outages.

A Severe Thunderstorm Warning has been issued for parts of Lake County, Indiana and Porter County until 4:15 p.m. EDT.

Storms remain possible across much of the region throughout the late afternoon and early evening. Widespread flooding has been reported in the city of Chicago and suburbs. A Flash Flood Warning has been issued for several counties.

Full forecast details at the WGN Weather Center