Millions of residents across multiple states in the U.S. have been warned to brace for a possible bomb cyclone, forecast to hit from Monday, December 29, through to the weekend, bringing heavy winds and wintry conditions, prompting the National Weather Service (NWS) to issue storm warnings and advise drivers not to travel unless it’s an emergency.

A "bomb cyclone" is intensifying severe winter weather for millions of people across the U.S. The system is expected to knock out power and disrupt holiday travel.

A powerful, rapidly intensifying storm sweeping across the central and eastern US is bringing a messy mix of blizzard conditions, severe thunderstorms, tornadoes and a sharp reality check to winter-like cold,

A potent winter storm threatened blizzard-like conditions, treacherous travel and power outages in parts of the Upper Midwest as other areas of the country braced Monday for plunging temperatures, strong winds and a mix of snow, ice, and rain.

A winter storm watch alerts the public to the possibility of heavy snow, freezing rain or sleet. Winter Storm watches are usually issued 12 to 48 hours ahead of predicted severe weather.

More than 122 million Americans are expected to travel at least 50 miles for Christmas and New Year's holidays this year.

National Grid is ramping up preparations for a severe weather system expected to hit Upstate New York from Sunday evening through Tuesday morning.

A winter storm will bring snow, sleet, and freezing rain to Maine on Monday. Slick travel and isolated outages are expected.

Airlines are working to get their schedules back to normal following the winter storm that caused thousands of delays and cancellations and made a mess on the roads.