CBS/AP/ December 25, 2012, 12:05 AM

Extreme weather worries across U.S. on Christmas Day

Updated 12:05 a.m. ET

Both coasts of the country are dealing with unusual weather this week during an especially challenging time. An estimated 93 million Americans are expected to drive or fly more than 50 miles from home for the holidays.

In the Sierra Mountains, they're dealing with three feet of snow in some spots.

From the possibility of tornados to heavy snowfall, there is great potential for a travel nightmare this holiday season. The fast-moving storm system is expected to have a significant impact on airport travel as it moves east.

Meteorologist Jeff Beradelli of CBS Miami station WFOR-TV said the southern storm system is looking like a classic severe weather setup, with warm, moist air from the Gulf of Mexico colliding with the jet stream to create unstable conditions. We may see howling thunderstorms and numerous, possibly strong tornados on Christmas Day.

The storms could bring strong tornadoes or winds of more than 75 mph, heavy rain, quarter-sized hail and dangerous lightning in Louisiana and Mississippi, the National Weather Service said. The greatest risk is in areas north of Interstates 10 and 12, with the worst storms likely along and southeast of a line from Winnsboro, La., to Jackson and DeKalb, Miss., according to the weather service's Jackson office.

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On the northern side of the system, there's a possibility of a very wide swath of heavy snowfall.

That will be good news on Christmas Day for folks expecting a white Christmas, but this is going to turn into a travel nightmare as the system makes its way up through the Ohio Valley, into the Great Lakes and interior portions of the Northeast. Some places will see one to two feet of snow, especially upstate New York and interior Pennsylvania.

Much of Oklahoma and Arkansas were under a winter storm warning, with freezing rain, sleet and snow expected on Christmas. A blizzard watch is out for western Kentucky. No matter what form it takes, travel Tuesday could be dangerous, meteorologists said.

"We understand that most people will be focusing on the holiday," said Mississippi Gov. Phil Bryant. "Please plan now for how you will receive a severe weather warning, and know where you will go when it is issued. It only takes a few minutes, and it will help everyone have a safe Christmas."

In Alabama, the director of the Emergency Management Agency, Art Faulkner, said he was briefing both local officials and Gov. Robert Bentley on plans for dealing with a possible outbreak.

Forecasters said storms would begin near the Gulf Coast and spread north through the day, bringing with them the chances of storms, particularly in central and southwest Alabama. No day is good for severe weather, but Faulkner said Christmas adds extra challenges because people are visiting unfamiliar areas. Also, people are more tuned in to holiday festivities than their weather radio on a day when thoughts typically turn more toward the possibility of snow than twisters, he said.

In California, after a brief reprieve across the northern half of the state on Monday, wet weather was expected to make another appearance on Christmas. Flooding and snarled holiday traffic were also expected in Southern California.

Ten storm systems in the last 50 years have spawned at least one Christmastime tornado with winds of 113 mph or more (F-2) in the South, Chris Vaccaro, a National Weather Service spokesman in Washington, said in an email. The most lethal were the storms of Dec. 24-26, 1982, when 29 tornadoes in Oklahoma, Missouri, Arkansas, Tennessee and Mississippi killed three people and injured 32; and those of Dec. 24-25, 1964, when two people were killed and about 30 people injured by 14 tornadoes in seven states.

A National Weather Service statement from Jackson, Miss., said the main questions are how far north and west the threat will spread — and whether the storms will be more scattered, resulting in a greater tornado risk, or more in the form of a squall line, resulting in a higher risk of damaging straight-line winds along with embedded tornadoes.

© 2012 CBS Interactive Inc. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.
8 Comments Add a Comment
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djc200 says:
Just be thankful you don't live in Russia right now where it's -50 CELSIUS!

"MOSCOW — As temperatures plummet to -50 Celsius in some parts of Russia, thousands have been evacuated from their homes in the country's Far East and Siberia. More than 120 people have died from the severe cold -- at least seven in the last 24 hours.

"Meteorologists say the country is experiencing one of its coldest winters in decades. In the Far East region of Magadan, 300 kilometers of roads remain blocked by heavy snow. Plows and machines can not reach those roads to clear them. In some places, snow is as much as five meters deep."

http://www.voanews.com/content/winter-weather-claims-lives-in-russia/1571822.html
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friend2008 says:
Well, as there is not historical fact that Christmas is really in 25th of Dec., I wonder why cannot we celebrate it in Jul 25th :)?
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JV1970 says:
I used to love winter weather when I was a child but now that I'm older not so much! I'm trapped inside.
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woofwinder says:
omg, winter weather in . . . winter. What shall we do.
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Martin_Turow says:
Now why can't more people be like FORMERLYLUVNUT! Let's party. That's what I say too! I'll never forget I was down in Mexico in Califia, and a few of us were having a great time, drinking drinks out of coconuts, smoking cigars, and laughing our heads off. A friend of mine said the funniest thing right when I had a mouthful of pina colada, but rather than choke, I went to the railing and spewed everything out of my mouth just in time, and nearly collapsed laughing on the floor. I'll never forget the Mexican guy at the other table, sitting with a bunch of his friends. He looked at me, then turned to his friends and said, "I wanna party with that guy!" Partying is true spirit. Too bad we don't do it more often.
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varigdc10 replies:
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I partied like crazy last Thursday because the world was going to end. Woke up Friday sometime and expected to be in either heaven or hell with a bottle in my hand, but woke up in Chicago very depressed and started partying again until now, Christmas day, Merry Christmas and party on, when is the world to end next time ?
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sincity_q says:
Heat, cold, thunderstorms, blizzards, male pattern baldness, toenail fungus and earwax are all caused by Global Warming! Now you know!
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crazygames22 replies:
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Here's a 2013 resolution for you: be less ignorant. Know what is actually happening in your world. Not what you *think* is happening. Not what other people *tell* you is happening. What actually IS happening.