Snow -- light late today, possibly heavy tomorrow -- is in the forecast for southwestern Connecticut.

A "Winter Storm Watch" has been issued for the region by the National Weather Service, which warns the storm could generate heavy snowfall from tomorrow afternoon through nighttime.

Today should be mostly cloudy, according to the NWS, with a daytime high temperature of about 34 degrees. There will be a north wind from 5 to 7 mph, then becoming southwest.

Flurries are possible tonight before midnight, as the temperature drops to about 26 degrees. Little or no snow accumulation is expected overnight.

But that's not the case in Friday's forecast.

The odds of snow are about 80 percent, starting light in the morning and increasing in intensity by afternoon. The temperature is expected to be in the mid-30s. Initial accumulation of 1 to 3 inches is possible, the weather service predicts.

Snow continues into Friday night, with additional accumulation of between 3 to 7 inches. The temperature will fall into the mid-20s, and wind gusts up to 20 mph are possible.

On Saturday, there remains a 50 percent chance of more snow as the daytime temperature will rise only to the freezing level. By Saturday night, the storm is expected to taper off to snow showers.

Sunday is expected to be mostly sunny and breezy, with a high temperature in the mid-30s.