Why is it so foggy in Chicago? Dense Fog Advisory Issued – NBC Chicago

A dense fog advisory issued for the entire Chicago area Monday will continue through the morning, the National Weather Service said, with visibility below a mile in parts to the north and west, including in Waukegan, Aurora and DeKalb.

The heavy fog led to a ground stop at Chicago’s Midway International Airport on Sunday, where two dozen flights were canceled.

According to the NWS, the Dense Fog Advisory will last until Monday at 11 a.m.

“Motorists should remain alert and be prepared to encounter sudden drops in visibility,” the NWS warned, with visibility dropping to near zero at times. “Drive slowly and keep your distance from other vehicles.”

Monday morning also started with rain, Roman said, with a few spotty showers passing through and a pocket of drizzle or a brief light shower possible through the morning commute.

According to Roman, Monday will remain mostly cloudy throughout the day with some breaks for sun.

But there is a silver lining, Roman said, as temperatures would remain mild and on the warmer side, with highs in the upper 40s to mid-50s.

Starting Tuesday, however, temperatures will drop, with highs in the upper 30s to near 40.

“Much cooler for your Tuesday,” Roman said.

Waves of light snow chances also arrive Tuesday, Roman said, with the first chance for a light rain-snow mix arriving late Tuesday into Wednesday morning.

Thursday afternoon offers another chance for a wintry mix, Roman said, followed by more chances for showers Friday morning.

“Now quite a lot, but definitely seeing some chances for snow,” Roman said of how much precipitation the area could see.

Colder temperatures move into the weekend as Saturday, December 21 marks the winter solstice.

“The first day of winter is Saturday, and it’s definitely going to feel like it, with 30 degrees,” Roman said of Saturday’s forecast.

By Christmas Day, temperatures were expected to rise, Roman said, with a high of 41 degrees.