This satellite image provided by NOAA and taken Tuesday Jan. 25, 2011 at 10:45 EST shows a huge swath of the United States affected by a winter storm that has already brought layers of dangerous ice and blowing snow, closing roads and airports from Texas to Rhode Island. The storm’s more than 2,000-mile reach threatened to leave about a third of the nation covered in a hodge-podge of harsh weather. Ice fell first and was expected to be followed by up to two feet of snow in some places. (AP Photo/NOAA)

This satellite image provided by NOAA and taken Tuesday Jan. 25, 2011 at 10:45 EST shows a huge swath of the United States affected by a winter storm that has already brought layers of dangerous ice and blowing snow, closing roads and airports from Texas to Rhode Island. The storm’s more than 2,000-mile reach threatened to leave about a third of the nation covered in a hodge-podge of harsh weather. Ice fell first and was expected to be followed by up to two feet of snow in some places. (AP Photo/NOAA)

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

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

Tim Houchin walks in the snow to work downtown, Tuesday, Feb. 1, 2011 in Tulsa, Oklahoma. Blizzard conditions struck the Tulsa area stranding motorists and shutting down much of the city. (AP Photo/Tulsa World, Christopher Smith)

Tim Houchin walks in the snow to work downtown, Tuesday, Feb. 1, 2011 in Tulsa, Oklahoma. Blizzard conditions struck the Tulsa area stranding motorists and shutting down much of the city. (AP Photo/Tulsa World, Christopher Smith)

A pedestrian walks through the intersection of Tenth and Cherry streets in downtown Columbia, Missouri, Tuesday, Feb. 1, 2011. Layers of dangerous ice and blowing snow closed roads and airports from Texas to Rhode Island on Tuesday as a monster storm began bearing down on the nation. (AP Photo/The Columbia Daily Tribune, Joshua A. Bickel)

A pedestrian walks through the intersection of Tenth and Cherry streets in downtown Columbia, Missouri, Tuesday, Feb. 1, 2011. Layers of dangerous ice and blowing snow closed roads and airports from Texas to Rhode Island on Tuesday as a monster storm began bearing down on the nation. (AP Photo/The Columbia Daily Tribune, Joshua A. Bickel)

Brian Boldt operates a large snowblower clearing the snow during a winter storm at Buffalo Niagara International Airport in Cheektowaga, N.Y., Tuesday, Feb. 1, 2011. (AP Photo/David Duprey)

Brian Boldt operates a large snowblower clearing the snow during a winter storm at Buffalo Niagara International Airport in Cheektowaga, N.Y., Tuesday, Feb. 1, 2011. (AP Photo/David Duprey)

In this photo provided by the San Diego Zoo shows giant panda Yun Zi Monday, Jan. 31, 2011, atop a tree while his mother, Bai Yun, ate her bamboo in an adjacent exhibit at the San Diego Zoo in San Diego. The 79-pound panda Yun Zi is on the way to independence as he reaches a new milestone — 18 months old. The two are spending their mornings alone and, for the moment, still come together in the afternoons. Their behavior will dictate when the gate is shut between them for the last time. (AP Photo/San Diego Zoo, Tammy Spratt)

In this photo provided by the San Diego Zoo shows giant panda Yun Zi Monday, Jan. 31, 2011, atop a tree while his mother, Bai Yun, ate her bamboo in an adjacent exhibit at the San Diego Zoo in San Diego. The 79-pound panda Yun Zi is on the way to independence as he reaches a new milestone — 18 months old. The two are spending their mornings alone and, for the moment, still come together in the afternoons. Their behavior will dictate when the gate is shut between them for the last time. (AP Photo/San Diego Zoo, Tammy Spratt)

People clear their cars while other cars make their way slowly through the streets of the Brooklyn borough of New York, Thursday, Jan. 27, 2011. (AP Photo/Seth Wenig)

People clear their cars while other cars make their way slowly through the streets of the Brooklyn borough of New York, Thursday, Jan. 27, 2011. (AP Photo/Seth Wenig)

Outbound traffic creeps along Interstate 66 across the Potomac River from Washington, in Arlington, Virginia, after a major winter storm snarled rush hour traffic in the nation’s capital, Wednesday, Jan. 26, 2011. (AP Photo/J. David Ake)

Outbound traffic creeps along Interstate 66 across the Potomac River from Washington, in Arlington, Virginia, after a major winter storm snarled rush hour traffic in the nation’s capital, Wednesday, Jan. 26, 2011. (AP Photo/J. David Ake)

A subway sign is covered in snow in the aftermath of a winter storm in Philadelphia, Thursday, Jan. 27, 2011. (AP Photo/Matt Rourke)

A subway sign is covered in snow in the aftermath of a winter storm in Philadelphia, Thursday, Jan. 27, 2011. (AP Photo/Matt Rourke)

President Barack Obama delivers his State of the Union address at the Capitol in Washington, Tuesday, Jan. 25, 2011. (AP Photo/Evan Vucci)

President Barack Obama delivers his State of the Union address at the Capitol in Washington, Tuesday, Jan. 25, 2011. (AP Photo/Evan Vucci)

The sun illuminates the clouds with the Washington Monument below as seen from Capitol Hill in Washington, Monday, Nov. 29, 2010. Flash flood watches have been posted for the Washington metro area for the Tuesday and Wednesday as heavy rain is expected. (AP Photo/Alex Brandon)

The sun illuminates the clouds with the Washington Monument below as seen from Capitol Hill in Washington, Monday, Nov. 29, 2010. Flash flood watches have been posted for the Washington metro area for the Tuesday and Wednesday as heavy rain is expected. (AP Photo/Alex Brandon)

A U.S. Navy F/A-18F Super Hornet fighter attack aircraft sits on a steam catapult before launching off the deck of the USS George Washington, during a joint military exercise off South Korea’s West Sea, in South Korea’s West Sea on Tuesday, Nov. 30, 2010. Jets roared off a supercarrier in U.S.-South Korean war games Tuesday, as the U.S. and two crucial Asian allies agreed to talk in Washington about North Korea’s attack on a South Korean island and the North’s nuclear weapons programs. (AP Photo/Wally Santana

A U.S. Navy F/A-18F Super Hornet fighter attack aircraft sits on a steam catapult before launching off the deck of the USS George Washington, during a joint military exercise off South Korea’s West Sea, in South Korea’s West Sea on Tuesday, Nov. 30, 2010. Jets roared off a supercarrier in U.S.-South Korean war games Tuesday, as the U.S. and two crucial Asian allies agreed to talk in Washington about North Korea’s attack on a South Korean island and the North’s nuclear weapons programs. (AP Photo/Wally Santana

Yoichi Katayama from Japan and a student at the Haas School of Business at UC Berkeley, takes a picture of the sunrise from Twin Peaks in San Francisco, Friday, Nov. 26, 2010. (AP Photo/Jeff Chiu)

Yoichi Katayama from Japan and a student at the Haas School of Business at UC Berkeley, takes a picture of the sunrise from Twin Peaks in San Francisco, Friday, Nov. 26, 2010. (AP Photo/Jeff Chiu)

Andrew Lapchynski, 22, is greeted by employees as he enters Best Buy Friday, Nov. 26, 2010, in Mayfield Heights, Ohio. Lapchynski came into the store to buy a television. (AP Photo/Tony Dejak)

Andrew Lapchynski, 22, is greeted by employees as he enters Best Buy Friday, Nov. 26, 2010, in Mayfield Heights, Ohio. Lapchynski came into the store to buy a television. (AP Photo/Tony Dejak)

Black Friday sales line up on an aisle at a Target store before the store opening Friday, Nov. 26, 2010, in Chicago. The store opened at 4 a.m. on Friday. (AP Photo/Kiichiro Sato)

Black Friday sales line up on an aisle at a Target store before the store opening Friday, Nov. 26, 2010, in Chicago. The store opened at 4 a.m. on Friday. (AP Photo/Kiichiro Sato)