Gray skies early this morning are the first sign of a winter storm enveloping southwestern Connecticut today, which the National Weather Service predicts could leave as much as 6 inches of snow in its wake.

A "winter weather advisory" has been issued by the weather service from 8 a.m. today to 6 a.m. tomorrow.

Snow is expected to begin falling by midday today and continue through late night, sometimes mixing with freezing rain.

Today's daytime high temperature will be in the mid-30s, with a northeast 5 to 10 mph in the morning. Chance of precipitation is 100 percent, according to the NWS.

Tonight, snow will continue through early morning tomorrow. The temperature will dip to a low in the mid-20s, with a northwest wind 10 to 14 mph. Chance of precipitation is 80 percent.

Tomorrow will be mostly cloudy in the morning, then gradually becoming sunny as the temperature rises to the mid-30s. It will be breezy, with a northwest wind 16 to 22 mph. Tomorrow night will be mostly clear, with a low temperature around 20 degrees, with a northwest wind 10 to 16 mph.

On Monday, skies will be mostly sunny, with a high temperature in the upper-30s and a west wind 9 to 14 mph. Nighttime brings a slight chance of snow showers and a low temperature in the mid-20s. Chance of precipitation is 20 percent.

Tuesday -- New Year's Day -- will be mostly cloudy, with a high temperature about 30 degrees. Nighttime will be partly cloudy, with a low temperature in the mid-teens.

The outlook for Wednesday is mostly sunny and temperatures will be in the 20s, according to the weather service.