Several inches of snow have already fallen and travel conditions are hazardous due to slippery roads.

The Darien Police Department is urging all residents to use caution and avoid travel unless it is necessary.

Snowfall, which began slowly this morning across southwestern Connecticut, is gathering intensity at midday.

In a special weather statement issued just before 1 p.m., the National Weather Service warns the snow could fall at rates of up to an inch an hour through evening, with overall accumulation at up to 6 inches.

Compounding the snow, visibility will be limited by the storm conditions, the NWS advises, late this afternoon and evening, making the homeward commute hazardous. The daytime high temperature should be in the mid-30s.

Fender-bender accidents have already been reported to police, and public works' crews are swinging into gear sanding and clearing local roads.

It will keep snowing tonight, mainly before 10 p.m., the weather service says, with additional accumulations of from 1 to 2 inches. The temperature will fall into the low-20s.

Tomorrow, there is a chance of snow showers, primarily in the afternoon. Skies will be mostly cloudy with a daytime high at the freezing mark. There will be a west wind between 8 and 15 mph.

Snow showers remain a possibility tomorrow night, mainly before midnight. The low will be around 22 degrees. The west wind will clock in at between 13 and 20 mph.

Sunday should be mostly sunny, with a high near 33. A northwest wind will be between 20 and 23 mph.

Conditions on Monday should be the same, the NWS says.

But by Tuesday or Wednesday, the weather service warns, a storm developing off the East Coast could develop into another winter blast.