Blizzard warnings were issued Saturday for New York City, New Jersey, southern New England and coastal communities along the East Coast.

A nor'easter is forecast for the East Coast this weekend, but the amount of snow that falls − and where − remains challenging to pinpoint as of Friday Feb. 20.

Here’s what to know about the “bombogenesis” of the storm battering the East Coast—and how the snowfall could be historic.

Severe storms will return on Sunday and Monday for parts of the Mississippi River Valley, Ohio Valley and East Coast. Strong, damaging winds will be the main threat, however, tornadoes will also be possible as a line of storms pushes eastward.

The storm, which is expected to pummel the Northeast and Mid-Atlantic regions through Monday, could bring 20 inches or more of snow to New York City.

A powerful nor'easter is expected to intensify into a "bomb cyclone" into Monday, bringing blizzard conditions, heavy snow and damaging winds from the mid-Atlantic to New England. Blizzard warnings have been issued across the East Coast from Virginia to New Hampshire,

We followed a deadly severe weather outbreak as it moved east, bringing the threat of tornadoes, damaging winds and flooding from the Gulf Coast to the mid-Atlantic.

A rapidly intensifying coastal storm is pushing out of the Northeast Monday, but its impacts are still being felt across New York — including the Finger Lakes — where gusty winds, lake-effect snow and multiple additional systems will keep winter weather in the forecast through the end of the week.

Airlines are expected to cancel over 5,000 flights across today and tomorrow, severely impacting airline operations on the East Coast.

A powerful coastal storm has transformed parts of the East Coast into a landscape of deep drifts and shuttered streets, hitting communities that rarely see more than a dusting of snow. From the mid-Atlantic to the Southeast, cities more accustomed to rain ...