Here are details from USA Today .  What this means is that you can leave a day early (or otherwise adjust your plans) without additional charge. If you are headed to the storm area (see below), it would be a good idea to leave tomorrow (no precipitation) or as early as possible Wednesday before storm conditions worsen. Here is the step-by-step of how to handle it. Remember: If your hub (a place where you change planes) is affected by the storm, it can cause even more problems than if your destination or origin airport has adverse weather. Good luck!!

This is a "storm total" forecast map. There is a very sharp gradient on the east side of the forecast snow field due, in part, to elevation and to the fact it has been mild before the cold air moves in. So, for example, it may be primarily rain at Reagan Airport with light accumulations with significantly heavier accumulations at Dulles. Timing: The snow will begin in western North Carolina and western Virginia during the pre-dawn hours Thursday Wednesday and then spread rapidly northeast. My advice is unchanged: Even if it is just rain and gusty winds at your destination airport, earlier is better.

From AccuWeather : This will be a major winter storm from Asheville to Maine. There will be drifting snow with the storm.

While there are other things going on in the world of weather and climate, there is so much interest in the storm in the East with Thanksgiving travel weather, we are going focus on the storm plus a second that may affect California the end of the week.  My forecast of snow amounts to 5pm EST Wednesday. More will likely fall Wednesday night and into Thursday. This storm will likely disrupt holiday travel. European model precipitation forecast of precipitation amount for late Thanksgiving weekend. While this will bring welcome rain, it also has the potential to cause more travel delays. This coverage is brought to you by Mike Smith Enterprises, LLC , which brings you a great book about how meteorologists warn of these storms . This account of people who do something about the weather should appeal to just about anyone who enjoys talking about it.  Copyright © Reed Business Information, a division of Reed Elsevier Inc. All rights reserved.

Considerable damage has already occurred from tornadoes today.

A genuine problem that poses huge issues …right here in the United States.

If you are traveling Wednesday or Wednesday night between Asheville and Boston, you have a chance of major travel disruptions. At best, it will be windy and rainy. At worst, there will be heavy snow with high winds. Here is a preliminary forecast snow accumulations from 4am until 4pm (EST) Wednesday. This is is not a storm total forecast (totals may be higher) and much can change between now and Wednesday. If it were me and I was planning to travel to this area, I would try to change my plans.  The best approach would be to see if you can leave a day earlier. Sure, you may have to pay for a extra hotel night but being there, safe and secure, makes an extra hotel night a small price to pay. The same advice applies to driving. My (free) airline survival guide tells you, step by step, how to do it. I suspect the airlines may issue waivers (some call them "exemptions" now) as early as Monday.