The current Great Lakes cold upper low system drifts east but is quickly replaced by another cold upper low Monday and Tuesday. Cloudiness and snow flurries will persist today and diminish overnight. Remnant north winds and periods of sun will prevail Sunday, but clouds return Monday with first rain Monday night, and then a rain/snow mix Tuesday.
A West Coast storm will cross the Rockies and develop into a major central Plains storm Wednesday. Southerly flow will spread cloudiness and rain over northern Illinois with rain beginning Wednesday night and continuing Thursday. Severe thunderstorms will be very active over the southern/central Plains and Mississippi Valley with this system. Thunderstorms will probably be embedded in the rain over the Chicago area with severe storms possible in southern/central Illinois Thursday. After a relatively mild three-day period, another upper-level cold pool is forecast for next weekend.
--Paul Dailey, WGN Weather Center Meteorologist
WGN-TV Chief Meteorologist Tom Skilling and the WGN Weather Center staff provide daily coverage of weather in the Chicago area.
