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A llama seeks shelter next to an abandoned school bus at Cox Farms March 6, 2013 in Centreville, Virginia. A winter storm hit the Washington, DC area today with areas west of the city seeing signficant snowfall, but the city itself seeing minimal snow. (Photo by Win McNamee/Getty Images)

Gusting winds and a heavy wet snow combined to bring down the canopy over gas pumps at a station in Henrico County, in suburban Richmond, Va. on Wednesday, March 6, 2013. The Richmond area dodged much of the late season storm while the western part of Virginia reporter up to 15 inches of snow. (AP PHOTO/ The Richmond Times-Dispatch, Joe Mahoney)

Johnny Connell, 5, takes a dive into the snow while his twin sisters Christine and Sammy, 3, and mother Megan Connell play in the yard across from their home in Clintonville, Ohio on Wednesday, March 6, 2013. A late-winter storm dumped a half-foot or more of snow across much of Ohio. (AP Photo/The Columbus Dispatch, Adam Cairns)

Patty Hoskin takes her dog, Sandy Sue, for a walk along Leavells Crossing Drive in Fredericksburg, Va., during a steady snowfall on Wednesday, March 6, 2013. Gov. Bob McDonnell declared a state of emergency Wednesday as up to 20 inches of snow piled up in parts of central and western Virginia. (AP Photo/The Free Lance-Star, Dave Ellis)

Marli Baldwin, 12, left, and Alina Nowosielski, 11, build a snowman in Westminster, Md. Wednesday, March 6, 2013. Carroll County Public Schools were closed Wednesday. (AP Photo/Carroll County Times, Dave Munch)

Sledding in the Homewood Cemetery was a way to spend a snow-day off school for Pittsburgh city school students, Wednesday, March 6, 2013. By afternoon the 3-5 inches that fell in Pittsburgh was melting as temperatures neared 40 degrees. (AP Photo/Gene J. Puskar)

A snow plow rests in a ditch after sliding off of Brock Road in Spotsylvania,Va., Wednesday March 6, 2013. Gov. Bob McDonnell declared a state of emergency Wednesday as up to 20 inches of snow piled up in parts of central and western Virginia. (AP Photo/The Free Lance-Star,Dave Ellis )

After a push from Niles Durazno, Shelby McVey and their son, Kaden Durazno, 3, blast through the snow Wednesday, March 6, 2013, on a hill at Matter Park in Marion, Ind. Grant County received between 5 and 7 inches of snow overnight. (AP Photo/The Chronicle-Tribune,Jeff Morehead )

A tree lies across westbound Route 3 in the Chancellorsville Battlefield area of Spotsylvania, Va., Wednesday March 6, 2013, as a major winter storm swept through the region. Gov. Bob McDonnell declared a state of emergency Wednesday as up to 20 inches of snow piled up in parts of central and western Virginia. (AP Photo/The Free Lance-Star,Dave Ellis )

People work to get a vehicle out of the snow along Route 60 in Midlothian, Va. on Wednesday, March 6, 2013. A winter storm marched into the Mid-Atlantic region Wednesday, dumping more than a foot of snow in some places and knocking out power to nearly 200,000 homes. (AP Photo/Richmond Times-Dispatch, Alexa Welch Edlund).

A man helps to give a vehicle a push out of the snow along Route 60, Wednesday, March 6, 2013 in Richmond, Va. Cars were getting stuck as they tried to get up the hill. A winter storm marched into the Mid-Atlantic region Wednesday, dumping more than a foot of snow in some places and knocking out power to nearly 200,000 homes. (AP Photo/Richmond Times-Dispatch, Alexa Welch Edlund).

Emma Erwin, 8, slide down the hill Wednesday, March 6, 2013, behind Danville High School in Danville, Ky. (AP Photo/The Advocate Messenger, Clay Jackson)

Traffic is at a stand still on State Route 3 eastbound in Virginia Wednesday March 6, 2013. A snowstorm blanketed the region closing schools, county governments and roads. (AP Photo/The Free Lance-Star, Reza A. Marvashti)

A jack-knifed tractor-trailer blocks the Georgesville Road exit from I-270 southbound, Wednesday, March 6, 2013 in Columbus, Ohio. A late-winter storm dumped a half-foot or more of snow across much of Ohio on Wednesday, creating treacherous driving conditions for the morning rush hour. (AP Photo/The Columbus Dispatch, Eamon Queeney)

Jack Erwin, 6, has fun making snow angels Wednesday, March 6, 2013., in Danville, Ky., behind Danville High School. (AP Photo/The Advocate Messenger, Clay Jackson)

In this image from video provided by WJZ-TV, emergency crews surround a tractor-trailer that overturned on the westbound span of the Bay Bridge, which crosses the Chesapeake Bay in Maryland. The bridge was closed in both directions after the crash Wednesday afternoon due to high winds from a snowstorm blowing through the Mid-Atlantic region. (AP Photo/WJZ-TV)

Garrett Strahin, 8, climbs a hill while carrying his sled in Masontown, W.Va., on Wednesday, March 6, 2013. A late winter storm dumped nearly a foot of snow Wednesday in West Virginia, closing schools in more than half the state and leaving more than 20,000 customers without power. (AP Photo/David Smith)

A sign spanning I 97 South in Millersville, Md., Wednesday, March 6, 2013., alerts travelers that the Chesapeake Bay Bridge is closed in both directions. Maryland's Bay Bridge was closed Wednesday afternoon in both directions due to high winds from a snowstorm blowing through the Mid-Atlantic region. (AP Photo/Carolyn Kaster)

Volunteers remove a downed tree on the road near Chancellorsville, Va. A snowstorm blanketed the Fredericksburg region on March 6, 2013, closing schools, county governments and roads. (AP Photo/The Free Lance-Star, Reza A. Marvashti)

A snowplow moves down a country lane during a massive blizzard near Mt. Jackson, Virginia March 6, 2013. Washington and its suburbs face what could be their heaviest snowfall in two years on Wednesday, as a fierce storm headed east after blanketing the Midwestern United States, snarling traffic and causing hundreds of flight cancellations. REUTERS/Gary Cameron

Bill Groves plays with his dog Red while shovelling snow during a massive blizzard near Mt. Jackson, Virginia March 6, 2013. Washington and its suburbs face what could be their heaviest snowfall in two years on Wednesday, as a fierce storm headed east after blanketing the Midwestern United States, snarling traffic and causing hundreds of flight cancellations. REUTERS/Gary Cameron

Annie Castro (L) and Sophia Benedetto battle gusting winds and snow to reach the top of a sledding hill on the grounds of Manassas Battlefield Park March 6, 2013 in Manassas, Virginia. A winter storm hit the Washington, DC area today with areas west of the city seeing signficant snowfall, but the city itself seeing minimal snow. (Photo by Win McNamee/Getty Images)

An abandoned pickup truck is covered with fresh snow on the edge of Cox Farms March 6, 2013 in Centreville, Virginia. A winter storm hit the Washington, DC area today with areas west of the city seeing signficant snowfall, but the city itself seeing minimal snow. (Photo by Win McNamee/Getty Images)

Three people walk the James Madison University Quad, with Wilson Hall pictured in the background, during the snow storm Wednesday morning, March 6, 2013 in Harrisonburg, Va. (AP Photo/Daily News-Record, Nikki Fox)

Richard Hardy takes his dog Beau for a walk at the Cobblestone Square Apartments in Fredericksburg, Va., on a snowy Wednesday morning March 6, 2013. Gov. Bob McDonnell declared a state of emergency Wednesday as up to 20 inches of snow piled up in parts of central and western Virginia. (AP Photo/The Free Lance-Star, Robert A. Martin) (REV-SHARE)

Rebecca Blackwell walks to work along Jefferson Park Avenue early Wednesday morning March 6, 2013 in Charlottesville, Va., as a snow snow hits the area. A winter storm continues to pile on snow in central and western portions of the state. (AP Photo/The Daily Progress,Sabrina Schaeffer)

Two men walk with snow shovels down Richwood Avenue in Morgantown, W.Va., on Wednesday, March 6, 2013. (AP Photo/David Smith)

A snow truck sweeps snow from a road in Silver Spring, Maryland, on March 6, 2013. AFP PHOTO/Jewel SAMAD/AFP/Getty Images

A man struggles with his umbrella during a snow storm in Silver Spring, Maryland, on March 6, 2013. A massive winter storm pounding the northern US on March 6, grounded 2,600 flights, closed hundreds of schools and made roadways and highways impassible. AFP PHOTO/Jewel SAMAD/AFP/Getty Images

A woman uses an umbrella as she cross a street during a snow storm in Washington, DC, on March 6, 2013. A massive winter storm pounding the northern US on March 6, grounded 2,600 flights, closed hundreds of schools and made roadways and highways impassible. At least four people were reportedly killed in accidents on icy and snow covered roads and highways. AFP PHOTO/Jewel SAMAD/AFP/Getty Images

Two women brace themselves against the wind as they walk past the United Nations entrance on First Avenue March 6, 2013 in New York as a winter storm heads to the eastern US. AFP PHOTO/Stan HONDA/AFP/Getty Images

Rental cars in a storage lot are covered in snow at the parking lot of Dulles International Airport, March 6, 2013, in Sterling, Virginia, a few miles outside of Washington, DC . Federal offices and many schools have closed in preparation for a mix of snow, sleet and rain which could account for the area's largest winter storm in two years. AFP Photo/Paul J. RICHARDS/AFP/Getty Images

Tourists walk during a late winter snow fall at the US Capitol in Washington, DC, March 6, 2013. Federal offices and many schools have closed in preparation for a mix of snow, sleet and rain which could account for the area's largest winter storm in two years.AFP PHOTO / Saul LOEB/AFP/Getty Images

Bicycles are parked outside Hamilton Hall dorms are covered in snow after a storm passed the area, Wednesday, March 6, 2013 at Wright State University in Dayton, Ohio. The National Weather Service has lifted winter storm warnings across Ohio, after a late-season storm dumped a half foot of snow or more on much of the state. (AP Photo/The Dayton Daily News, Ty Greenlees)

A man braces against a small tree and a woman leans against the wind as it whips between buildings Wednesday, March 6, 2013, in Trenton, N.J. Winds from a winter storm are lashing New Jersey and are doing some damage. The National Weather Service says rain was expected to change to all snow toward Wednesday night. (AP Photo/Mel Evans)

A fallen tree blocks one side of Earlysville Road in Charlottesville, Va.as snow continues to fall Wednesday, March 6, 2013. A winter storm continues to pile on snow in central and western portions of the state. (AP Photo/The Daily Progress, Sabrina Schaeffer)

Jimmy Floyd uses a snow blower to clear the snow from the end of his driveway during the largest winter storm of the season so far in Staunton, Va., on Wednesday, March 6, 2013. Gov. Bob McDonnell has declared a state of emergency in Virginia, as snow continues to pile up and knock out power to electric customers. (AP Photo/The Staunton News Leader, Mike Tripp)

A tow truck operator attempts to remove a car that crashed during a massive blizzard in the median of Highway 50 near Winchester, Virginia, outside of Washington, March 6, 2013. REUTERS/Gary Cameron

Liz Dauberman helps her daughter Nicole, 7, insert a carrot into her snowman's head as Jessica, 10, works on her own snowman in their Shrewsbury, York County, Pa. front yard on Wednesday, March 6, 2013. (AP Photo/York Daily Record,Chris Dunn )

Cattle seek shelter during a massive blizzard near Winchester, Virginia, outside of Washington, March 6, 2013.REUTERS/Gary Cameron

Eva Heikenfeld, 5, from Mt. Lookout, laughs as she goes down the hill on a sled with her father Shane Heikenfeld at Ault Park in Cincinnati on Wednesday, March 6, 2013. The National Weather Service has lifted winter storm warnings across Ohio, after a late-season storm dumped a half foot of snow or more on much of the state. Some areas in western Ohio got as much as 9 inches of snow before the storm moved on through the state eastward. (AP Photo/The Cincinnati Enquirer, Leigh Taylor)

Matt Brugoon, 15, of Seven Valleys, snowboards on the hill beside Liberty Christian Fellowship Church in Seven Valleys, York County, Pa., Wednesday March 6, 2013. Brugoon and friends, including Kyle Williams, 15, right, spent the morning on the hill on Wednesday. (AP Photo/York Daily Record,TIM STONESIFER )

Strong west winds from the approaching winter storm push Pamlico Sound water up on Hatteras Island at Rodanthe, N.C. on Wednesday, March 6, 2013. After pummeling the nation's midsection with heavy snow, a late-winter storm made its way Wednesday to the East Coast, where residents braced for the possibility of power outages. (AP Photo/The Virginian-Pilot, Steve Earley)

Prince William County rescue squads work to help a car accident victim out of the wreckage March 6, 2013 in Prince William Coutny, Virginia. The accident was likely caused by icy conditions and blowing snow due to the winter storm on the East coast.AFP PHOTO/Karen BLEIER/AFP/Getty Images

From left, Maeve Talty, 10, Caroline Talty, 8, and Maureen Greenwell, 8, all from Mt. Lookout, Ohio, try to stay on a sled together at the Cincinnati Observatory Center in Hyde Park on Wednesday, March 6, 2013. Hundreds of schools including in some of Ohio's biggest public districts called off classes Wednesday. (AP Photo/The Cincinnati Enquirer, Leigh Taylor)

The Dauberman family's 2-year-old Labrador retriever, Casey, catches a mouthful of snow thrown by Jessica, 10, in their Shrewsbury, York County, Pa. front yard on Wednesday, March 6, 2013. (AP Photo/York Daily Record, Chris Dunn)

Vehicles travel past a damaged semi-truck trailer (R) that was removed from the median strip on Interstate 81 near Winchester, Virginia, outside of Washington, March 6, 2013. REUTERS/Gary Cameron

Canada Geese swim in a pond during a massive blizzard near Winchester, Virginia, west of Washington, March 6, 2013. Jokingly referred to as "snowquestration" in a nod to the federal budget crunch, the wintry weather prompted storm warnings for much of the Ohio River Valley and the mid-Atlantic states and as far south as Georgia as the storm moved east, the National Weather Service said. REUTERS/Gary Cameron

Jason Smith clears the sidewalk in front of his home at the 2400 block of Anthony Blvd., in Fort Wayne, Ind., before heading to work Wednesday morning March 6, 2013, as his daughters Kylie Smith, right, 8, and Alexa Smith, 7, make snow angels on their day off from school. (AP Photo/The Journal Gazette, Swikar Patel)

Traffic flows along I-581 as seen from Elm Avenue on Wednesday morning in Roanoke. Warm temperatures kept snow from accumulating on roads and sidewalks. (AP Photo/The Roanoke Times, Joel Hawksley)

As snow continues to fall people begin digging snow out their cars in Staunton, Va., on Wednesday, March 6, 2012.Virginia State Police say they have responded to more than 200 motor vehicle crashes over an eight-hour period and have received hundreds of other calls during a winter storm pounding the state. (AP Photo/The News Leader, Mike Tripp)

Ashton Lam, left, 8, is buried in the snow by friend Ava Miller, 10, as they enjoy the winter weather in Staunton, Va, on Wednesday, March 6, 2012. The March snowstorm is primarily hitting a region stretching from central Virginia to the northern and western portions of the state, where snow is piling up quickly. (AP Photo/The News Leader, Mike Tripp)

An SUV travels in the falling snow on Frontier Drive in Staunton, Va., on Wednesday, March 6, 2012. Virginia State Police say they have responded to more than 200 motor vehicle crashes over an eight-hour period and have received hundreds of other calls during a winter storm pounding the state. (AP Photo/The News Leader, Mike Tripp)

Tourists brave the falling snow to visit the Lincoln Memorial in Washington March 6, 2013. A fierce snowstorm packing heavy, wet snow shut down the U.S. capital on Wednesday as Washington could get slammed by its biggest snowfall in possibly two years, with 6 to 12 inches (15 to 30 cm) of snow expected after the storm moved eastward into the Mid-Atlantic States, the National Weather Service said. REUTERS/Kevin Lamarque

Workers use shovels and brooms to remove a heavy mixture of snow and ice from the west front of the U.S. Supreme Court March 6, 2013 in Washington, DC. A late winter storm is expected to cover the Mid-Atlantic region after dropping almost a foot of snow across the the West and Midwest. (Photo by Chip Somodevilla/Getty Images)

A pedestrian walks down Pennsylvania Ave near the White House in Washington, Wednesday, March 6, 2013. Schools, businesses and the federal government closed in anticipation of a snow storm that could blanket the region. (AP Photo/Pablo Martinez Monsivais)

A pedestrian crosses the street as snow falls on March 5, 2013 in Chicago, Illinois. The worst winter storm of the season is expected to dump 7-10 inches of snow on the Chicago area with the worst expected for the evening commute. (Photo by Brian Kersey/Getty Images)

A couple walks along a path in Millennium Park during a snowstorm in Chicago March 5, 2013. A deadly late winter storm dumped heavy snow on the Midwestern United States on Tuesday, contributing to numerous highway crashes and flight cancellations as it moved east toward the Ohio Valley and the mid-Atlantic states. REUTERS/Jim Young

Joseph Pankey, 6, sleds through the snow at Schadt Park in Silvis, Ill., on Tuesday, March 5, 2013. (AP Photo/The Dispatch, Todd Mizener)

Keith Kunde clears snow from Sacred Heart Church in Dubuque, Iowa, after the area received several inches of snow on Tuesday, March 5, 2013. (AP Photo/The Telegraph Herald, Mike Burley)

Arturo Garcia (L) and Ricardo Perez clear snow from Riverside Plaza on March 5, 2013 in Chicago, Illinois. The worst winter storm of the season is expected to dump 7-10 inches of snow on the Chicago area with the worst expected for the evening commute. (Photo by Brian Kersey/Getty Images)

Kent Farley clears a parking lot of snow on Tuesday, March 5, 2013, in Coal Valley, Ill. (AP Photo/The Dispatch, Todd Mizener)

Charlie Regenold, 5, gets a ride to the school bus stop from his dog "Rodney" as the snow fell early Tuesday, March 5, 2013 in southwest Minneapolis. The National Weather Service predicted a two-day snow total of 8 to 12 inches for much of southeastern and east-central Minnesota, including the Twin Cities. (AP Photo/The Star Tribune, Elizabeth Flores)

Xavier Maroff, left, gets a push from his dad Kyle as his brother Kayden races him down the sledding hill in the snow at Schadt Park in Silvis, Ill., on Tuesday, March 5, 2013. (AP Photo/The Dispatch, Todd Mizener)

Corey Cleven of Winona, Minn., walks along West Sixth Street in the snowfall Tuesday, March 5, 2013, in Winona, Minn. The National Weather Service in La Crosse reported at least 11.8 inches of snow fell. (AP Photo/Winona Daily News, Andrew Link)

Traffic makes its way northbound on I-35W into downtown Minneapolis early Tuesday, March 5, 2013. The National Weather Service predicted a two-day snow total of 8 to 12 inches for much of southeastern and east-central Minnesota, including the Twin Cities. (AP Photo/The Star Tribune, Elizabeth Flores)

Kevin Anderson trudges through the snow on his way home from work Tuesday, March 5, 2013, in Dubuque, Iowa. This will be the biggest widespread storm of the winter," National Weather Service meteorologist Amy Seeley said. (AP/Telegraph Herald/Jessica Reilly)

Bob Gove, Elkhart, kayaks the St. Joseph near along State Road 120 east of Elkhart, Ind., Tuesday March 5, 2013. Gove says he prefers to kayak on days it snows. Gove was hoping to kayak from one to two hours Tuesday. (AP Photo/Elkhart Truth, J. Tyler Klassen)

A couple takes pictures of an LED display on 50-ft tall glass towers, projecting images of faces in Crown Plaza during snow in Chicago March 5, 2013. A deadly late winter storm dumped heavy snow on the Midwestern United States on Tuesday, contributing to numerous highway crashes and flight cancellations as it moved east toward the Ohio Valley and the mid-Atlantic states. REUTERS/Jim Young

Houston Hardy made sure to bundle up his dog Amor before taking her out for a walk, Tuesday, March 5, 2013, along South Second Street in Elkhart, Ind. The National Weather Service called for 4 to 7 inches of snow through Tuesday evening with winds up to 15 to 20 mph throughout much of Northern Indiana. (AP Photo/The Elkhart Truth, Ryan Dorgan)

A mail carrier loads his truck on March 5, 2013 in Chicago, Illinois. The worst winter storm of the season is expected to dump 7-10 inches of snow on the Chicago area with the worst expected for the evening commute. (Photo by Brian Kersey/Getty Images)

Pedestrians cross the Chicago River on March 5, 2013 in Chicago, Illinois. The worst winter storm of the season is expected to dump 7-10 inches of snow on the Chicago area with the worst expected for the evening commute. (Photo by Brian Kersey/Getty Images)

Becky Alprin (L) and Russell Flench cringe as a gust of wind hits their faces while crossing the street on March 5, 2013 in Chicago, Illinois. The worst winter storm of the season is expected to dump 7-10 inches of snow on the Chicago area with the worst expected for the evening commute. (Photo by Brian Kersey/Getty Images)

A City of Chicago snow plow pushes the slush off the road on March 5, 2013 in Chicago, Illinois. The worst winter storm of the season is expected to dump 7-10 inches of snow on the Chicago area with the worst expected for the evening commute. (Photo by Brian Kersey/Getty Images)

Dave Lofquist helps out his neighbors by snow blowing the sidewalks early Tuesday, March 5, 2013 in southwest Minneapolis. The National Weather Service predicted a two-day snow total of 8 to 12 inches for much of southeastern and east-central Minnesota, including the Twin Cities. (AP Photo/The Star Tribune, Elizabeth Flores)

Donald Samsal shovels his driveway after his snowblower broke down on Tuesday March 5, 2013 in Burnsville, Minn. The National Weather Service predicted a two-day snow total of 8 to 12 inches for much of southeastern and east-central Minnesota, including the Twin Cities. (AP Photo/The Star Tribune, Brian Peterson)

Lindsay Knutson, left, plays in the heavy snow with her family dog, Aspen, and daughter Flora Bejblik, 4, as her husband Bob Bejblik, rear left, shovels snow on Tuesday, March 5, 2013 in southwest Minneapolis. The National Weather Service predicted a two-day snow total of 8 to 12 inches for much of southeastern and east-central Minnesota, including the Twin Cities. (AP Photo/The Star Tribune, Elizabeth Flores)

A snow plow clears a parking lot at O'Hare International Airport in Chicago on Tuesday, March 5, 2013. A late winter storm packing up to 10 inches of snow sent officials in weather-hardened Chicago into action Tuesday to prevent a repeat of scenes from two years ago, when hundreds of people in cars and buses were stranded on the city's marquee thoroughfare during a massive blizzard. (AP Photo/Nam Y. Huh)

A pedestrian shields himself with an umbrella as he walks down the street on March 5, 2013 in Chicago, Illinois. The worst winter storm of the season is expected to dump 7-10 inches of snow on the Chicago area with the worst expected for the evening commute. (Photo by Brian Kersey/Getty Images)

A woman walks by the Cloud Gate Sculpture, known as "The Bean", as a snow plow clears the area during a snowstorm in Chicago March 5, 2013. A deadly late winter storm dumped heavy snow on the Midwestern United States on Tuesday, contributing to numerous highway crashes and flight cancellations as it moved east toward the Ohio Valley and the mid-Atlantic states. REUTERS/Jim Young