Outages also stretched to New Jersey and Pennsylvania.
Wind gusts reached 71 mph in Greenwich, Connecticut, 76 mph in Suffolk County, New York, and 67 mph in New York City.
The highest rain total was more than 3.5 inches in Pennsylvania. Those venturing out on Christmas Day should be wary of flash flooding.
On the back side of the storm, heavy snow fell from Buffalo, New York, to Cleveland to the mountains of North Carolina.
The Cleveland metro area saw the most snow, with 9.4 inches.
The wintery blast also extended to the South. Impressive snowfall totals were measured in Tennessee and North Carolina, where up to 6 inches accumulated.
Snow fell as far south as Georgia, where 1 to 2 inches was recorded.
The same storm system produced severe thunderstorms with two tornadoes reported in Virginia and a third reported in North Carolina.
The worst of the storm is now moving through New England, bringing heavy rain and damaging winds.
Despite the storm, many Northeast cities saw their warmest Christmas in history, from 61 degrees in Worcester, Massachusetts, to 64 degrees in Burlington, Vermont, and Scranton, Pennsylvania.
New York City to Washington, D.C., will begin to dry out and cool off in the afternoon as arctic air moves in.
Temperatures Saturday morning will fall to the 20s with wind chills in the teens and single digits.
A freeze warning has even been issued for central Florida, including Orlando, where the temperature Friday night into Saturday morning could fall to 29 degrees.