At least 90 minutes of showers and thunderstorms were expected to occur — as indicated by weather radar for northern Illinois. More than one-half of the western half of Illinois was covered by showers and thunderstorms, and part of that band is advancing toward northeastern Illinois. Weather radar indicates the severe weather threat is diminishing. At 9:15 p.m. a gap parted the storms near Arlington Heights. South Barrington and Lake County had some thunder and lightning with a house reported struck by lightning in South Barrington, but Arlington Heights has been relatively dry. As of 9:40 p.m. there was still some threat of lightning and heavy rain that could pass through Arlington Heights and surrounding suburbs.
Forecasters expect the rain to end after midnight. Heavy rain and cloud-to-ground lightning is forecast, but as of 8:40 p.m. no severe thunderstorm warnings were posted in Illinois. A Tornado Watch is in effect in southwest Illinois near St. Louis, Missouri.
The NWS Wind Advisory was canceled early.
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