CHICAGO - Chicago is gearing up for a week of fluctuating weather, with rain and even snow on the horizon. The National Weather Service forecasts a chance of isolated showers or sprinkles tonight. Monday afternoon into Tuesday morning, periods of rain are expected.

Chicago has already passed the date where the city sees its first trace of snow, but will we see wintry precipitation this month?

Periods of rain have returned to the Chicago area, with the second round arriving overnight tonight. Waves of rain with occasional thunderstorms are expected to yield rain totals of 0.75"-1" by mid-morning Tuesday.

After a mild and cloudy evening Sunday, the Chicago area is set to experience a week of rapidly changing weather, including rain, cooler temperatures, and even a chance of wet snow.

A powerful winter storm is set to blast portions of the U.S. with heavy snow, cold temperatures, strong winds and rain just as millions of people across the country prepare to travel for Thanksgiving.