Sunny skies today across southwestern Connecticut will give way to an overnight winter storm that the National Weather Service could drop up to 5 inches of snow -- perhaps more -- on the region before tapering off tomorrow afternoon.

In the sunny calm-before-the-storm today the high temperature is expected to rise into the mid-30s, with a northwest wind between 9 and 13 mph.

According to the winter storm watch issued by the weather service, the snow is expected to begin falling late tonight or very early tomorrow as temperatures fall to the low 20s.

The snow will continue falling tomorrow morning and into afternoon, with accumulations now estimated to be between 3 to 5 inches, although the NWS warns the snowfall total could be as much as 7 inches.

After the storm clears from the area, tomorrow night is expected to remain cloudy and the temperature will drop to a low of about 20 degrees.

On Sunday, skies will be sunny, with a high temperature in the upper-30s. By Sunday night, the NWS says there is a chance of rain, mainly after midnight and the temperature will drop to the mid-30s.

Monday, the weather service predicts, there is a chance of rain with high temperature near 50 degrees.