Severe Thunderstorm Watch for northeast Illinois until 9 pm

Data pix.

CHICAGO -- The NWS Storm Prediction Center issued a Severe Thunderstorm Watch for portions of northeast Illinois, southeast Wisconsin and Lake Michigan from 3:40 p.m. Thursday until 9 p.m.

According to the NWS, a fast-moving line of thunderstorms will continue eastward into the watch area, posing a risk of locally damaging winds of up to 70 mph and hail as large as 1.5 inches in diameter.

As of 6:30 p.m., northern portions of the line are beginning to weaken, according to the NWS. The southern part of the line will likely continue to be strong as it makes its way across northeast Illinois, and may move on over Lake Michigan.

Radar tracking the strong thunderstorms as they head towards the area detected winds of 45 mph.

With temps approaching 90 degrees, and dew points ranging from the upper 60s to mid 70s, the atmosphere has become very unstable.

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