The second day of 2012 will be relatively mild and breezy, but not as balmy as New Year's Day, according to the National Weather Service, which warns a cold snap is coming tonight.

Today, skies will be mostly sunny, with a daytime high temperature in the mid-40s, with a west wind around 21 mph, gusting as high as 32 mph.

Tonight, the Polar Express arrives, bringing a chance of snow flurries and low temperatures tumbling to the mid-20s. There will be a west wind between 11 and 15 mph.

Snow flurries continue to be a factor in the forecast for tomorrow, under cloudy skies with a high near 29 degrees. There will be a blustery, northwest wind between 15 and 20 mph.

Temperatures tomorrow night plummet to a low of 10 to 15 degrees, with wind-chill values feeling as though as it is minus-1 degree below zero.

Wednesday will be partly sunny, with a high near 30 degrees. Skies will be cloudy at night, with a low temperature in the mid-20s.

The outlook for Thursday calls for partly sunny conditions and a high temperature in the upper-30s, the weather service predicts.