msnbc.com staff and news service reports
updated 1/31/2011 6:15:07 PM ET 2011-01-31T23:15:07

Mother Nature strikes again.

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More bad weather was on the way for U.S. travelers as a monster winter storm was expected to pummel much of the nation, bringing a potentially deadly mix of sleet, snow and ice and carving a path from Colorado to New England by week's end.

Story: 'Freaking out' over Midwest megastorm

Storms last week virtually shut down New York's LaGuardia and Kennedy airports for much of the day and stranded travelers in Philadelphia and Washington, D.C. A late-December Northeast blizzard canceled more than 10,000 flights over three days.

The wintry blast descending through the Midwest also is expected to bring subzero wind chill factors to Super Bowl week in Texas. The National Weather Service is advising Packers and Steelers fans to put off travel in advance of the Feb. 6 game in Arlington, Texas, until later in the week. Freezing precipitation and low temperatures in the teens are expected in the Dallas-Fort Worth area Tuesday and Wednesday.

In response to the huge storm, some airlines were allowing air travelers to make changes to their itineraries.

Delta issued an advisory on its website, stating that "winter weather is expected to impact travel to, from and through 20 states in the Northern U.S." through Feb. 4. The airline was allowing travelers to reschedule their itineraries without a fee or get a refund if their flights are canceled or significantly delayed.

United Airlines has issued travel waivers for passengers traveling to, from or through 19 states in the Midwest and Northeast. The waivers permit air travelers to make changes to their itineraries without penalty and get a full refund in the event that their flight is canceled.

American Airlines is waiving change fees for travelers flying to, from or through the 40 Midwest cities.

AirTran Airways is also allowing travelers in affected cities to adjust travel dates through Feb. 10 with no change fees.

On its website, Southwest Airlines posted that is is "keeping a close eye on the conditions" and provided specific information for air travelers in more than 30 cities in the Midwest and East Coast.

Information from The Associated Press is included in this report.

© 2013 msnbc.com

Video: Powerful storm threatens 30 states

  1. Closed captioning of: Powerful storm threatens 30 states

    >>> several major airlines are prepared to ground thousands of flight as head of nationwide winter storm . forecasters are calling it historic. united and delta issuing waivers for passengers traveling to and from the midwest. american and southwest are keeping an eye on the forecast and let people reschedule if stuck. several states are expecting snow, ice, high winds over the next three days. over 100 million people live in the storm's path. that's a third of the u.s. population from colorado all the way to new england. and emergency officials say icing along could paralyze transportation and spark massive power outages. the weather channel 's samantha moor keeping track of the storm.

    >> incredible. talking about very heavy snow. along an incredibly long swath. some 2100 miles long from oklahoma city stretching on up into chicago, across the great lakes, into new england with a foot of snow possible. some spots will even see more than this. it's the icing. that is going to be a major concern as it's going to make these roadways totally unnavigable, as we head into the next few days. the heaviest icing right now expected from around ft. smith, arkansas, through st. louis in through indianapolis and also -- that's where we could see an inch of ice, an inch of ice. that is impossible to drive on. and even a quarter and a half of inch can make thing vs very rough on the roadwayses. major impacts on the road roys and airports. as we head into our tuesday, big problems in dallas with the ice and the snow. of course, st. louis could end up being locked down just plain closed because of snow and ice there. same thing in indianapolis and cleveland, also going to see some incredible issues here. as we head into wednesday, it will nobe into chicago, washington. new york city the rain as we head into wednesday and the system shifts to the east. this will be a problem, as you said, that affects hundreds of millions of people as we head into the next few days. if you're a mariner on lake michigan , we could see waves up around 25 feet high, just incredible stuff out of this storm.

    >> thank you very much.

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