A snowstorm will continue to spread a swath of snow eastward for more than 1,000 miles from the Midwest to the Northeast through the weekend.
The snowstorm is projected to impact every major city and rural area from St. Louis to Boston and Portland through Saturday night including Chicago, Detroit, Cleveland, Pittsburgh, Philadelphia and New York City.
Due to the track and intensity of the snowstorm, it is likely that driving conditions will become dangerous as roads become snow covered and slippery along the I-70, I-75, I-80, I-81, I-87, I-88, I-90 and I-95 corridors.
Major airports may also experience significant travel delays and cancellations, as poor visibility, snow-covered runways and icy planes may halt safe travel.
The heaviest snowfall, accumulating 12 to 18 inches, will bury much of northern New England, southern Quebec and the Adirondack Mountains of upstate New York.
UPDATES: (All times are listed in Eastern Time)
8:26 a.m. EST Saturday: The New York City skyline is no longer visible on web cameras from Newark, N.J., where you can see the skyline on a clear day.
8:17 a.m. EST Saturday: The following picture was taken near Kingston, N.Y.:
@LeeGoldbergABC7 Just off of exit 19 nys thruway. pic.twitter.com/6vXXFZqwYL— Mike Odato (@mikeodots) December 14, 2013
8:16 a.m. EST Saturday: Heavy snow continues to fall around the St. Louis area. Visibility has dropped to a half-mile at the city's International Airport. One of the heaviest bands of snow around the area is centered on I-70, just east of the intersection of I-55.
8:00 a.m. EST Saturday: The following image, from the Illinois Department of Transportation, shows the latest road conditions across Illinois. The time listed at the bottom of the image is in Central Time.
7:56 a.m. EST Saturday: Flight cancellations at Newark's International Airport have already topped 300.
7:44 a.m. EST Saturday: National Weather Service spotter reports 7.2" of snow near Lake St. Louis, located west of St. Louis.
7:30 a.m. EST Saturday: The narrow band of heavy snow located just north of St. Louis and into central Illinois is expected to produce totals of up to 10 inches.
7:11 a.m. EST Saturday: Missouri DOT camera snapped this image of snow-covered Route 67, which is located Lambert-St. Louis International Airport.
7:06 a.m. EST Saturday: While it was still snowing heavily, a measurement of 6.0 inches of snow was reported by a National Weather Service spotter near New Haven, Mo., which is located west of St. Louis.
7:00 a.m. EST Saturday: Light snow has started falling at Newark, N.J., and New York City's John F. Kennedy International Airport.
AccuWeather.com's Staff Writer Kristen Rodman contributed to the content of this story.