This Christmas, the eastern half of the United States is expected to experience a wet holiday instead of a snowy-white one. On Tuesday, meteorologists warned about a huge storm system packing strong winds and heavy rain targeting to wreak havoc through America's eastern regions on Christmas Eve.

 Just in time to rattle the holiday travel plans, the Christmas storm is projected to ground flights and to clog traffic. According to MLive.com, the storm will happen on Dec. 23, Wednesday.

"It's really a wide-ranging storm system with several weather phenomena that could cause delays across the eastern portion of the country," National Weather Service meteorologist Mike Musher told Fox News on Tuesday. "Unfortunately, it's happening at one of the most-traveled days of the year."

Initially, the Christmas storm is expected to pull warm air into most of America's eastern part prompting heavy rain on Dec. 24. Then between 6 p.m. and 12 midnight, colder air will move upon to change the rain to snow.

It was predicted by the National Weather Service experts that on Christmas Eve, snow could fall from Missouri to Michigan. According to Fox News Chicago, three inches of snow could fall in the region, where O'Hare and Midway airports are projecting approximately 4.2 million travelers throughout the holiday season.

Mike Musher said light to moderate rainfall will give way into a soaking storm Christmas Eve, and rain was expected through the day in some New England states as well as in New York.

Meanwhile, a holiday travel took a tragic turn Tuesday afternoon as at least 4 people were killed by tornadoes that swept through the south. NBC News reported damage-causing twisters wreaked havoc in Louisiana and Georgia but the most fatal were in Mississippi, where four people have died.

On Christmas Eve, heavy rain brought by thunderstorms and wind will envelop much of the East Coast, The Weather Channel said.  Major flight delays will probably experienced Wednesday at the Northeast city hubs, along with Charlotte, Atlanta and Florida's main airports due to high winds, heavy rain, thunderstorms and low clouds. And delays could reach as far west as Cincinnati and Detroit.