The storms are expected to produce lightning, possible small hail and heavy rain, and the biggest risk to residents is flooding.
Radar-indicated rotation in a thunderstorm in Cook, Lake and McHenry counties prompted National Weather Service to issue a tornado warning for about 45 minutes Wednesday evening, but no touchdowns were reported or confirmed by the time the warning expired at 7:45 p.m.
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Tornado sirens activated around the area during the warning.
WEATHER ALERT: NORTH SUBURBS – Tornado warning in effect until 745 pm…possible tornado over Wauconda area. In video, tornado sirens activate in Arlington Heights at approx. 7:10 pm. pic.twitter.com/NnThETNlqT
— J&T Scanner (@JT_Scanner) September 12, 2019
Severe storms are possible especially north of I-88 in the overnight hours/
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Stronger storms formed in southern Wisconsin in the afternoon and are expected to move into the Chicago area after 8 p.m. Another storm cell that is not severe was to the west near Dundee as of 7:45 p.m., moving east into the Chicago area.
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