The highest snowfall amounts are currently expected between just east of New York City and Boston, where as much as two feet of snow is expected.

New York City can expect 12-18 inches of snow, with cities southwest on I-95, like Philadelphia seeing 6-12 inches.

\"PHOTO:
ABC News
PHOTO: A major nor'easter is forecast to develop of the east coast late Monday and rapidly intensify by Tuesday morning bringing heavy snow and strong winds.
>

Winter storm watches, warnings, and advisories are in effect from the mid-Atlantic to New England, with blizzard watches posted for cities closer to the coast, including New York City and Boston, where blizzard conditions are expected during the height of the storm.

In anticipation of the dangerous winter weather, several major U.S. airlines have issued travel advisories, including Jet Blue, US Airways, American, Southwest and Delta.

Many airlines are also waiving their flight change and cancellation fees for any flights that are scheduled to arrive in cities expected to be affected by the storm this evening and Tuesday.

Travelers can check with their specific airline for how to change or cancel their flight and get the latest updates on any travel advisories.

Get real-time updates as this story unfolds. To start, just \"star\" this story in ABC News' phone app. Download ABC News for iPhone here or ABC News for Android here.

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