Many school districts already have canceled Thursday classes including New York City, Philadelphia and Boston.
This storm is likely to exceed that rapid deepening rate, aided by a strong disturbance in the jet stream, clashing air masses and relatively warm Gulf Stream waters off the coast of New England. At least a foot of snow is expected to fall across the state before the storm moves out.
Sustained winds from the north are expected to be 15 to 25 miles per hour, with gusts of 30 to 35 miles per hour., according to AccuWeather.
"Visibilities will become poor with whiteout conditions at times".
The day before the Nor'easter, the region saw highs in the 60s and 70s.
The storm appears to end for southern and western areas by early evening Thursday, with the last flakes falling over eastern and northern ME in the wee hours of Friday.
The flight board at Armstrong International is showing a handful of delays and crenelations of flights to a from New York, Boston and Washington DC.
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Blizzard and winter storm warnings are in effect for the entire region through the evening, with Storm Team 4 predicting 10 to 15 inches of snow for much of the area.
Wednesday saw temperatures of almost 60 degrees in New York City, and Thursday will be a little, er, different.
There are now no coastal warnings in effect, but Alan Dunham from the National Weather Service in Taunton said they are "still evaluating" and there may be more minor splash over.
Officials warned of treacherous travel conditions, and one snow plow on Long Island, New York, appeared to have trouble navigating the roads when it crashed into a pole.
CitiBike service was expected to remain in service Thursday until further notice.
"It's just the beginning of the storm, so it's only going to get worse", he said.
No vehicles are allowed to be parked on any roads in town that are designated as snow emergency routes, and any vehicles parked there are subject to ticket and tow at the owner's expense. According to USA Today, flights on American, Southwest, Delta, United have been scrubbed, and almost 60 percent of JetBlue's entire Thursday flights have been cancelled.