CHICAGO --Rain is moving through Chicagoland and a dense fog advisory has been issued for Cook and Lake County Illinois through tonight.
Areas of dense fog are expected near the lake and potentially developing inland. Low visibility and hazardous travel conditions are also expected.
The advisory expires at 9 a.m. tomorrow.
And that’s when things could already be more interesting.
Low pressure impulses will track east along an east-west oriented stationary front across central Illinois during the next 12 hours, triggering strong to potentially severe eastward-moving bands of thunderstorms. On Wednesday night, as a stronger center of low pressure strengthens in the plains, the stationary front is expected to move north, converting to a warm front with increased thunderstorm activity along and north of the front.
The entire Chicago area is included in an outlook for a potentially large severe storm outbreak Thursday (see map below). The entire Chicago area is included in the enhanced 30 percent risk for severe storm development within 25 miles of any given point. Super cell thunderstorms are likely to produce large hail, damaging winds and a few tornadoes in the enhanced area mainly during the peak-heating afternoon and evening hours Thursday.