Weather

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A freezing mist settles over Washington at dawn on Tuesday, Feb. 2, 2011, as icy winter weather advances toward the nation's capital. The Washington Monument is seen in the distance amid the cherry trees bordering the Tidal Basin. (AP Photo/J. Scott Applewhite)

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John Pfeiffer of North Mankato, Minn., shovels his way through yet another snowstorm on Monday, Jan. 31, 2011. The storm prompted many schools in south-central Minnesota to close and created difficult driving conditions. (AP Photo/Mankato Free Press, John Cross)

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Snowplows work to remove ice from Interstate 55 on Tuesday, Feb. 1, 2011, in St. Louis. A blizzard warning is in effect for the St. Louis area, where early ice and sleet will give way to anywhere from 6 to 20 inches of snow. (AP Photo/Tom Gannam)

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A New York Department of Sanitation front loader removes snow from Clinton Street near a car that is buried by another mound of snow on the Lower East Side of Manhattan on Tuesday, Feb. 1, 2011, in New York. (AP Photo/Mary Altaffer)

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Morning commuters make their way over a snow-covered Williamsburg Bridge on Tuesday, Feb. 1, 2011, in New York. (AP Photo/Mary Altaffer)

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A man walks his dog in freezing temperatures in downtown Denver as steam rises from manhole covers on Tuesday, Feb. 1, 2011. The temperature is not forecast to go above zero on Tuesday. (AP Photo/Ed Andrieski)

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Rebecca Valk walks to her office in Poughkeepsie, N.Y., in near-whiteout conditions on Tuesday, Feb. 1, 2011. A monster storm began to bear down on the middle of the nation, threatening to leave up to a third of the nation covered in brutal winter weather. (AP Photo/Poughkeepsie Journal, Spencer Ainsley)

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Two local residents walk through floodwater after getting ice and food to take to their flooded residence in the suburb of New Farm in Brisbane, Australia., on Jan. 13, 2011. Cyclone Yasi, a strong tropical cyclone, roared toward Australia's flood-ravaged northeast on Monday, Jan. 31, 2011, prompting evacuations and warnings from officials that the storm could be the worst the already-swamped region has ever seen. (AP Photo/Tertius Pickard, File)

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Lydia Vasquez scrapes ice from the windshield of her car in Denver on Monday, Jan. 31, 2011. A front moved through Colorado early Monday morning, bringing with it freezing rain, snow and cold. (AP Photo/Ed Andrieski)

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This NOAA satellite image taken on Monday, Jan. 31, 2011, at 12:45 a.m. EST shows cloud cover and precipitation developing in the Northern Plains, ahead of disturbances in the West. (AP Photo/Weather Underground)

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Lakeesha Paylor, who worked with Newark, N.J., Mayor Cory Booker to dig cars out from under the snow, gets a hug from the mayor after he helped her unearth her own car Thursday. (Associated Press)

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A man helps an elderly woman cross a snow-covered street Thursday on the Lower East Side of Manhattan. (Associated Press)

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The silhouettes of casualties are seen in the snow in front of overturned passenger rail cars after a head-on crash on Saturday, Jan. 29, 2011, between a freight and a passenger train in Hordorf, near Oschersleben in eastern Germany. (AP Photo/dapd, Jens Schlueter)

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Workers roll out the red carpet and setup for the SAG Awards at the Shrine Auditorium in Los Angeles on Saturday, Jan. 29, 2011. (AP Photo/Jason Redmond)

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A tow truck operator attempts Thursday to free a car that had been stuck in the snow along the northbound George Washington Parkway in McLean, Va. More snow is predicted for Friday, though the National Weather Service said the Washington area should expect only about an inch. (Associated Press)

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FILE - In this Sept. 11, 2005 file photo, the Louisiana Superdome sits in the foreground as floodwaters from Hurricane Katrina continue to recede in New Orleans. The 36-year-old Louisiana Superdome is getting its biggest overhaul since Hurricane Katrina tore away a lot of the roof and flooded the arena with millions of gallons of water. (AP Photo/David J. Phillip, Pool, File)

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David Campbell, with the National Park Service, shovels snow off the steps of the Lincoln Memorial on the National Mall in Washington on Thursday, Jan. 27, 2011, after a large snow storm swept through the area the previous evening. (AP Photo/Jacquelyn Martin)