Cloudy skies will cover southwestern Connecticut most of this Christmas Day -- but that's the good news in the National Weather Service for the region.

The bad news?

A "winter storm watch" has been issued for Sunday afternoon, with the NWS warning there could be "significant snowfall" overnight into Monday morning.

Beside the mostly cloudy conditions today, the daytime high temperature will be in the mid-30s, with a north wind between 5 and 8 mph. The temperature will be to about 26 degrees tonight.

Tomorrow, snow is likely after 4 p.m. The storm will be driven by a northeast wind 10 to 13 mph gusting up to 20 and 23 mph. With a 60 percent chance of precipitation, the new snow accumulation could be about inch possible.

Snow is expected to continue falling Sunday night, as the low temperature falls to about 25. A north wind will clock between 24 and 34 mph, with gusts as high as 44 mph. New snow accumulation of 4 to 8 inches is possible.

Monday, snow could continue to fall until about 9 a.m. It will still be windy, with gusts up to 25 and 32 mph. The day will be cloudy with a high temperature in the low 30s.