Far west sections of the Chicago area outlooked by the Storm Prediction Center for possible severe overnight t-storms

Far western sections of the greater Chicagoland area---an area which includes Rockford and possibly sections of Boone, McHenry, Ogle and Lee counties--are included in the Storm Prediction Center's latest severe weather outlook covering the period which runs through tonight. The latest run of our in-house 4 km. RPM (Rapid Precision Mesoscale) model brings clusters of thunderstorms into sections of northwest and north-central Illinois by 9:30 pm and suggests active thunderstorms could proceed eastward into northwest and western sections of the Chicago metro area toward midnight--proceeding in weakening fashion into Chicago late tonight.
It's one take on tonight's meteorological situation which we'll be monitoring and updating on our 5:30 pm and 9PM Monday evening programs and here on our WGN Weather Blog.

http://www.spc.noaa.gov/products/outlook/day1otlk.html

Tom Skilling