Heavy snows in the Mid-Atlantic region Saturday spurred flight cancellations at Tampa International Airport.
All flights between Tampa and Washington D.C. have been cancelled, and many flights between Baltimore, Philadelphia and Pittsburg have also been cancelled.
The blizzard has left thousands in the Mid-Atlantic region without electricity. Forecasters said the storm could be the biggest for the nation's capital in modern history.
A record 2 1/2 feet or more was predicted for Washington. As of early Saturday, 10 inches of snow was reported at the White House, while parts of Maryland and West Virginia were buried under more than 20 inches.
Forecasters expected snowfall rates to increase, up to 2 inches per hour through Saturday morning.
Information from the Associated Press was used in this report.