The final phase of a two-part nor'easter means from 2 to 6 more inches of snow for Long Island by Friday morning's commute, with deeper amounts expected to the east, National Weather Service meteorologist Lauren Nash said Thursday.
National weather service's Nelson Vaz said that as of 11:45 p.m. Thursday the Island had about 1-3 inches of snowfall, generally more on the North Shore.
The most dense bands of snowfall were expected to generate accumulation on the ground at the rate of about an inch an hour and reduce visibility to about half a mile, the weather service said.
The morning commute will likely be "wet and messy," Nash said, with heavier snowfall waning by late morning, followed by snow showers into the evening.
Snow was falling across much of the Island Thursday night, with rain or a wintry mix in some areas, meaning a messy evening commute, she said.
Coastal flood advisories are in effect through 10 a.m. for the Long Island Sound and through 8 a.m. for ocean-facing coastlines and South Shore bays, with a warning of "minor to localized moderate" flooding.
On the North Fork, scattered rain and snow fell throughout the day.
"It seems to be nothing more than a typical late winter, early spring day," Southold Town Supervisor Scott Russell said.
Area airports experienced scattered delays, with the Federal Aviation Administration reporting more than 90-minute delays at LaGuardia and Newark Liberty airports by 8 p.m. Thursday, several hours after dozens of morning flights were canceled.
The storm had been expected to leave as much as a foot of snow on the East End and generate serious coastal flooding. But the system pulled in dry air from the west as it advanced, meaning less snow than first forecast, service meteorologist Nancy Furbush said.
With David Schwartz and Zachary R. Dowdy