Christmas Eve, Day winter storm to snarl traffic in midwestern and northeastern US

As millions take to the roads or prepare to fly to their destinations, winter storms will be on the prowl in the central and eastern United States through Christmas morning.

A record 107.3 million people will take to planes, trains, aircraft and buses during the period from Saturday, Dec. 23, through Monday, Jan 1, according to the American Automobile Association (AAA).

While no intense storms are forecast, there will be areas of rain, ice and snow affecting heavily populated areas and popular travel routes.

RELATED: 2017 winter weather predictions

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2017 winter weather predictions
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2017 winter weather predictions

This year's Farmer's Almanac predicts less precipitation in the Pacific Northwest and Upper Midwest, but other areas might not be so lucky ...

Source: www.almanac.com

The National Oceanic and Atmospheric Administration predicted La Nina will potentially emerge this winter season, bringing with it above-average precipitation and below-average cold temperatures.

Source: www.noaa.gov

But if La Nina does hit, it will impact each U.S. area in a different way ...

For example, the Rockies would likely be rocked with abundant snowfall, while the Midwest would be plagued with blasts of cold air.

Source: www.accuweather.com

Another more wonky model from Atmospheric and Environmental Research predicts that colder temperatures could hit the East Coast if there is a stratospheric polar vortex disruption.

Changes in the jet stream have a direct impact on weather patterns, and in the earliest days of December Americans could see a cold front and snow in the Plains and upper Great Lakes.

Averaging 44 inches of snow each winter, Boston is known to get slammed with tough weather. This year, NOAA predicts the historic city will see within 10 inches of that average.
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The first storm will move on to target areas from the upper Gulf coast to the lower Great Lakes, central and southern Appalachians and the Interstate 95 corridor of the Northeast with rain from Friday to Saturday.

Snow, ice and treacherous travel from the first storm will spread from the central Great Lakes to part of the central Appalachians and New England into Saturday.

Another storm to blanket Rockies, Plains and Upper Midwest with snow into Christmas Eve

The second storm of concern will bring accumulating snow to the central Rockies, including the Denver area on Saturday, before turning eastward Saturday night and Sunday.

It is this second storm that has the greatest potential to leave some snow on the ground for a white Christmas in parts of the central Plains, Ohio Valley states and central Appalachians.

Airline delays will be possible due to deicing operations while portions of I-25, I-35, I-69, I-70, I-74, I-75, I-77, I-80 and I-90 will be slippery.

Accumulating snow is forecast in Omaha, Nebraska; Kansas City, Missouri; Des Moines, Iowa; St. Louis; Chicago; Indianapolis; Detroit; Cleveland and Toronto as it rolls out Saturday night and Christmas Eve. Snow may cover the ground in Evansville, Indiana; Louisville, Kentucky; and Cincinnati, Dayton and Columbus, Ohio.

Snow showers may linger over the central and northern Rockies in the wake of the storm.

The same storm is also projected to spread snow into parts of Pennsylvania, West Virginia, western Maryland and western New York toward the end of the day on Christmas Eve.

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It is after dark on Christmas Eve, when the storm from the Midwest will attempt to join up with a budding storm along the Atlantic coast.

Third storm to bring snow to part of mid-Atlantic, New England Sunday night to Christmas Day

The track and strength of the storm, as well as the speed at which much colder air arrives, will determine the form of precipitation from parts of eastern Pennsylvania and New Jersey to southeastern New England from Sunday night to early Christmas Day.

At this time, all or mostly rain is forecast from Washington, D.C., to Philadelphia and Atlantic City, New Jersey.

However, snow and sleet are likely to mix in from near Lancaster, Allentown and Scranton, Pennsylvania, to Trenton, New Jersey; New York City; Hartford, Connecticut; Providence, Rhode Island; and Boston Sunday night to Christmas morning.

Accumulating snow may fall as far to the southwest as Center City Philadelphia, Baltimore Inner Harbor and Washington, D.C.

Heavy snowfall is expected to fall over much of central and northwestern New England and northeastern New York state for a time on Christmas Day. In these areas, travel to church services, friends and family may be difficult.

Elsewhere, dry weather and a wildfire risk will continue in California, while a couple of storms may bring rounds of mixed precipitation to the coastal Northwest into Christmas Day.

Much colder air entering the middle of the nation during the weekend prior to Christmas will be just the start of a frigid weather pattern for many. Aside from storms, a broadening blast of cold air will be a major factor in the weather during the week of Christmas.

The frigid air will unleash bands of lake-effect snow and may pave the way for snow and ice as additional storms are likely to come about.

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