A brief isolated shower is in the forecast between 8 p.m. and midnight Tuesday night, but otherwise, cloudy skies are expected as temperatures drop below freezing in the upper 20s to near 30 degrees.As the weather pattern takes a more active turn for the middle of the country Wednesday,

Chicagoans can expect a chilly Thanksgiving holiday weekend, with a chance of snow on Wednesday and Thursday. Temperatures for Turkey Day itself are expected to be in the mid-30s, according to the National Weather Service.

Chicago experiences higher temperatures longer than outlying suburbs due to the urban heat-island effect. Its location next to Lake Michigan’s warm waters explains why the city and nearby suburbs freeze later in the year than their farther-out counterparts.