A band of severe weather brought tornado warnings to the Chicago area and parts of northern Illinois. The threat of high winds remains, and tornadoes could occur near and south of I-80. Thursday morning's commute will be chilly,

The same storm bringing the risk of severe weather and even a couple of tornadoes to the vast Chicago metro area into Wednesday evening will rapidly push cold air into the region Wednesday night along with snow.

Cold air has plunged into Chicago, with the rain/snow mix changing to all snow before dawn. Light snow, about an inch or so in accumulation, is possible on Sunday morning. Snow ends by early afternoon.