Here's the source page for the image with more information.
NOAA / NASA GOES Project
On Monday, December 27 at 1731 UTC (12:31 p.m. EST) the GOES-13 satellite captured this visible image of the powerful low pressure system that brought snows from Georgia to Maine along the U.S. east coast. Some of the snowfall can be seen over South and North Carolina, Virginia, Maryland, Delaware, eastern Pennsylvania, New Jersey, and southeastern New York. The clouds of the low obscure New England in the image.