A major winter storm will unleash more travel-snarling snow across the Chicago into early Wednesday.
Chicago is expected to receive 3-6 inches of snow, with even higher amounts to the south of the city. Roads will become snow-covered and slippery. Flight cancellations were already in place ahead of the storm early Tuesday.
Following Tuesday's storm, another blast of arctic air will chill the region as the daytime high on Thursday will only be in the single digits with a low below zero.
Another storm could move into the area by the end of the coming weekend.
Showers and thunderstorms will return to the Southwest late this week and could reach part of California.
The late-season swelter will continue along much of the Atlantic Seaboard through the week as tens of millions head back to school and work.
An area of low pressure will bring a threat of heavy rain and flooding to parts of southern Europe through the middle of the week.
The southwest Gulf of Mexico has given birth to the Atlantic basin's fourth tropical storm of the season and will send torrential rain into northern Mexico.
Following a warm, humid start for the first days of September, lower humidity and more pleasant conditions will return to the Pittsburgh area.
A cold front swinging into the Northeast will bring the threat of severe weather to part of the region on Tuesday afternoon.
East Coast (1775)
Matecumbe Key, FL (1935)
Labor Day Hurricane hit Florida. Pressure at Matecumbe Key dipped to 26.35"/892.3 mb. Most intense hurricane ever to hit the U.S. with 200-mph wind. Tide of 15 feet; 408 dead.
Mecca, CA (1950)
126 degrees - highest ever for U.S. in Sept.