There are already major (greater than 2 hours) flight delays at Chicago with significant delays at Philadelphia, Dallas (both airports) and Houston Hobby. More delays will develop during the day. I'm shocked that the airlines I have checked do not yet have waivers out when the National Weather Service in Boston is calling the looming blizzard "historic." My Airline Crisis Survival Guide is essential reading if you are planning to travel from Philadelphia, north, from today into Saturday night.
As always, AccuWeather is on top of this and here is our forecast snowfall.
10:30am EST: The forecast map above has 6-7" falling in NYC. One late model has amounts closer to a foot along with strong winds. I'm mentioning this because I am on the road for business and it will be a few hours before I can take a second look at this. Regardless of the exact amount, this will be a significant snow for NYC.
This means that widespread power failures (if snow sticks to trees and branches bring lines down) along with crippled transportation are likely. Auto, train, and airlines will all be severely affected.
Roofs may collapse under the weight of the snow, especially during the period of highest winds.
It may be nearly impossible to obtain prescription refills, etc.
So, it is time to prepare for these conditions immediately! AccuWeather works with Lowes stores to insure they have essential supplies in conditions like this. You may wish to start there if you need batteries, flashlights, generators, etc.