The watch, which warns of the potential for significant snow, sleet or ice accumulations, will be in effect for Hartford and Litchfield counties beginning Wednesday morning and ending late Wednesday night, the weather service said.
The worst driving conditions look to be limited from roughly 10 p.m. through 7 a.m. Wednesday. Total daytime snow accumulation of less than one inch possible. East wind 3 to 8 miles per hour.
There's also a chance of wintry precipitation this weekend.
The "Expect at least this much" map has no snowfall across southern CT and the New York City area.
Eyewitness News Chief Meteorologist Wayne Hart says the main concern will be from 9:00 Tuesday evening through the morning drive Wednesday because of the combination of freezing rain and snow. Northwest winds will be 5-10 miles per hour.
Although lesser amounts of snow are expected in Western New York, forecasters project up to a foot is possible in those areas under the winter storm watch, south and east of metro Buffalo. Cloudy, then gradually becoming partly cloudy, with a low around 23.
High temperatures will be significantly colder on Tuesday across KAKEland with morning lows starting off in the teens and 20s with highs in the afternoon in the low to upper 20s.
Wednesday night, the low will be around 19, with a calm wind becoming south 5 to 8 miles per hour after midnight, according to the weather service.
Monday, the high will be near 41 with mostly cloudy skies, the weather service said.
OVERNIGHT: Light snow will develop overnight and fill in across central Indiana.
Chances for snow showers or flurries this morning in the metro Buffalo area.
Saturday, there will be a 40 percent chance of snow with a high near 29, the weather service said. While parts of the shore could see temps spike near 40 degrees, parts of northern CT and the valleys will stay near or below freezing the entire day.
Wednesday Night: Mostly clear, with a low at 22.