The eastern half of the US is under a very large airmass full of clouds and cold air.
All the blue and red dots indicate mostly cloudy to overcast sky conditions.
And in some of that cold air, snow is falling.
State College, Pennsylvania, saw the earliest snow on record. The previous record stood since October 18, 1901.
Nearly a half-foot fell in the college town.
Snow was also flying across southern New York and across much of the rest of northern and central Pennsylvania.
This type of weather is anywhere from 2 to 4 weeks ahead of schedule.
More snow is in store this weekend along the mountains of Pennsylvania and New York, and possibly extending down into the highest elevations of Virginia and West Virginia.