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People wait for the 16th Street Mall Shuttle in downtown Denver, December 06, 2013. A storm has moved into much of Colorado bringing freezing temperatures and snow. (Photo by RJ Sangosti/The Denver Post) ( COLD_RJ24750 )

A bicyclist walks his bike through the snow on the Indiana University campus in Bloomington, Ind. Friday, Dec. 6, 2013. The National Weather Service has issued a winter storm warning and is predicting about 10 inches of snow by midnight Friday. (AP Photo, Bloomington Herald-Times, David Snodgress) ( Cold Snap Indiana )

Seth English scraps the ice off his car windshield Friday, Dec. 6, 2013 in Owensboro, Ky. Kentucky Transportation Cabinet maintenance crews were out treating roadways early Friday in anticipation of the winter weather, and multiple school districts called off classes. (AP Photo/The Messenger-Inquirer, John Dunham ) ( Cold Snap Kentucky )

A tree felled by ice rests near a house Friday, Dec. 6, 2013, in Richardson, Texas. Winter storm and ice warnings are in effect through much of today for parts of six states in the Midwest, including Texas, Missouri, Illinois and Indiana. An ice storm in North Texas has knocked out power to more than a quarter of a million homes and business, canceled almost 1,000 flights and contributed to a fatal wreck. The National Weather Service issued a winter storm warning for the Dallas area until Friday night. (AP Photo/LM Otero) ( Cold Snap Texas )

Snow removal equipment clears the wet sleet on the ramp area at Dallas-Fort Worth International Airport, Friday, Dec. 6, 2013. The weather forced more than 1,000 cancellations at Dallas-Fort Worth International Airport, one of the nation's busiest airports and a key hub for Fort Worth-based American Airlines. Many travelers were stuck waiting and hoping for another flight to take them to their destination. (AP Photo/The Dallas Morning News, Tom Fox) ( Cold Snap Texas )

A gust of wind collapses Joseph Mezo's umbrella as he walks to work in light sleet and ice conditions Friday morning, Dec. 6, 2013, in Dallas. (AP Photo/LM Otero) ( Cold Snap Texas )

A bronze statue is covered in ice at Grand Prairie Municipal Airport in Grand Prairie, Texas, USA, 06 December 2013. A large ice storm causing travel problems and power outages moved through the Dallas, Texas area and across the midwest. EPA/BRANDON WADE ( USA WEATHER ICE STORM )

Vehicles are pushed up a slick hill on East Lancaster Ave. in Fort Worth, Texas on Friday, Dec. 6, 2013. Winter storm and ice warnings are in effect through much of today for parts of six states in the Midwest, including Texas, Missouri, Illinois and Indiana. (AP Photo/The Fort Worth Star-Telegram, Ron T. Ennis) ( Cold Snap Texas )

Fall leaves are covered in a layer of ice at Vandergriff Park in Arlington, Texas, USA, 06 December 2013. A large ice storm causing travel problems and power outages moved through the Dallas, Texas area and across the midwest. EPA/BRANDON WADE ( USA WEATHER ICE STORM )

Traffic on I-30 traffic moves slowly east due to ice that accumulated overnight in Fort Worth, Texas on Friday, Dec. 6, 2013. Winter storm and ice warnings are in effect through much of today for parts of six states in the Midwest, including Texas, Missouri, Illinois and Indiana. (AP Photo/The Fort Worth Star-Telegram, Ron T. Ennis) ( APTOPIX Cold Snap Texas )

Matthew Eller, 15, catches air after sliding down a hill and jumping a ramp in Arlington, Texas, USA, 06 December 2013. A large ice storm causing travel problems and power outages moved through the Dallas, Texas area and across the midwest. EPA/BRANDON WADE ( USA WEATHER ICE STORM )

A large limb rests on a power line after breaking away from a tree due to heavy ice accumulation, Friday, Dec. 6, 2013 in Paris, Texas. Winter storm and ice warnings are in effect through much of today for parts of six states in the Midwest, including Texas, Missouri, Illinois and Indiana. (AP Photo /The Paris News, Sam Craft) ( Cold Snap Texas )

A small herd of cows graze in Brown County near Nashville, Ind. during a snowstorm Friday, Dec. 6, 2013. The National Weather Service has issued a winter storm warning and is predicting about 10 inches of snow by midnight Friday. (AP Photo, Bloomington Herald-Times, David Snodgress) ( Cold Snap Indiana )

A car makes its way down a sleet-covered hill in Little Rock, Ark., Friday, Dec. 6, 2013. Weather forecasters lifted an ice storm warning Friday for much of central Arkansas. (AP Photo/Danny Johnston) ( Cold snap Arkansas )

Mark Vogel and his daughter Parker, 7, take the sled he used when he was a kid to the icy streets in Fort Worth, Texas on Friday, Dec. 6, 2013. Winter storm and ice warnings are in effect through much of today for parts of six states in the Midwest, including Texas, Missouri, Illinois and Indiana. (AP Photo/The Fort Worth Star-Telegram, Joyce Marshall) ( Cold Snap Texas )

Holly berries are coated with ice on a tree near Newburgh, Ind. in Warrick County on Friday morning, Dec. 6, 2013. A winter storm is dumping ice and snow on the area with predictions of possible 10-12 inches of snow.(AP Photo/The Evansville Courier & Press, Kevin Swank) ( Cold Snap Indiana )

A pedestrian crosses Fourth Street during a snow storm on Friday morning, Dec. 6, 2013, in downtown Columbus, Ind. Several inches of snow fell on central and southern Indiana, making driving treacherous and leading to at least two fatal crashes. (AP Photo/The Republic, Andrew Laker) ( Cold Snap Indiana )

Jim Cline face is covered in snot as he removes snow from Christmas trees for shoppers following a winter storm Friday, Dec. 6, 2013, in Indianapolis. Several inches of snow fell on central and southern Indiana, making driving treacherous and leading to at least two fatal crashes. (AP Photo/Darron Cummings) ( Cold Snap Indiana )

Amy Davison shovels snow in her neighborhood following a winter storm Friday, Dec. 6, 2013, in Indianapolis. Several inches of snow fell on central and southern Indiana, making driving treacherous and leading to at least two fatal crashes. (AP Photo/Darron Cummings) ( Cold Snap Indiana )

A bicyclist rides his bike on the Monon Trail following a winter storm Friday, Dec. 6, 2013, in Indianapolis. Several inches of snow fell on central and southern Indiana, making driving treacherous and leading to at least two fatal crashes. (AP Photo/Darron Cummings) ( Cold Snap Indiana )

Mark Vogel gives his daughter Parker, 7, a push on the sled he used when he was a kid on the icy streets in Fort Worth, Texas on Friday, Dec. 6, 2013. Winter storm and ice warnings are in effect through much of today for parts of six states in the Midwest, including Texas, Missouri, Illinois and Indiana. (AP Photo/The Fort Worth Star-Telegram, Joyce Marshall) ( Cold Snap Texas )

Hunter Semple uses a rubber mallet to clear the ice from the windshield of his new vehicle in Fort Worth, Texas on Friday, Dec. 6, 2013. Winter storm and ice warnings are in effect through much of today for parts of six states in the Midwest, including Texas, Missouri, Illinois and Indiana. (AP Photo/The Fort Worth Star-Telegram, Joyce Marshall) ( Cold Snap Texas )

Branches of a tree are covered in a layer of ice at Vandergriff Park in Arlington, Texas, USA, 06 December 2013. A large ice storm causing travel problems and power outages moved through the Dallas, Texas area and across the midwest. EPA/BRANDON WADE ( USA WEATHER ICE STORM )

Traffic moved slowly around along S. National Ave. and Highway 60 on Friday morning, Dec. 6, 2013, in Springfield, Mo. Winter storm and ice warnings are in effect through much of today for parts of six states in the Midwest, including Texas, Missouri, Illinois and Indiana. (AP Photo/The Springfield News-Leader, Valerie Mosley) ( Cold Snap Missouri )

People walks along the 16th Street Mall in downtown Denver, December 06, 2013. A storm has moved into much of Colorado bringing freezing temperatures and snow. (Photo by RJ Sangosti/The Denver Post) ( COLD_RJ24750 )

Sparks fly from the Kentucky Transportation Department Cabinet's plow while scrapping ice off the eastbound lane of the Audubon Parkway early Friday, Dec. 6, 2013 at Kentucky 1554 overpass in Sorgho. Kentucky Transportation Cabinet maintenance crews were out treating roadways early Friday in anticipation of the winter weather, and multiple school districts called off classes. (AP Photo/The Messenger-Inquirer, John Dunham ) ( Cold Snap Kentucky )

Jason Rice clears snow in front of the Bartholemew County Governmental Office on Friday, Dec. 6, 2013 in downtown Columbus, Ind. The overnight winter storm brought snow and ice to the region, and a winter storm warning that continues throughout the day. (AP Photo/The Republic, Chet Strange) ( Cold Snap Indiana )

Daniel Poma of Denton scrapes ice off his car before trying to take his finance to work in Hurst, Texas following an overnight ice storm on Friday, Dec. 6, 2013. (AP Photo/The Dallas Morning News, Gary Barber) ( Cold Snap Texas )

Two people ride a all terrain vehicle on a sleet-covered street in Little Rock, Ark., Friday, Dec. 6, 2013. Weather forecasters lifted an ice storm warning Friday for much of central Arkansas. (AP Photo/Danny Johnston) ( Cold Snap Arkansas )

Cattle graze in a field along Progress Parkway Friday, Dec. 6, 2013 in Ste. Genevieve, Mo. The National Weather Service issued winter storm and ice warnings through much of Friday for parts of Texas, Oklahoma, Arkansas, Mississippi, Missouri, Illinois, Indiana and Tennessee. (AP Photo/St. Louis Post-Dispatch, Huy Mach) ( Cold Snap Missouri )

Prynce Ware, left, and Nivea Harris get a taste of snow flakes Friday morning, Dec. 6, 2013 in Cape Girardeau, Mo. Winter storm and ice warnings are in effect through much of today for parts of six states in the Midwest, including Texas, Missouri, Illinois and Indiana. (AP Photo, Southeast Missourian, Fred Lynch) ( Cold Snap Missouri )

In this photo taken Thursday, Dec. 5, 2013, motorists proceed cautiously along Main Street as snow falls in downtown Roswell, N.M. (AP Photo/Roswell Daily Record, Mark Wilson) ( Cold Snap New Mexico )

Quinn O'Brien, 3, found the snowfall to be as much as a meal as something to sled on at a Festus Elementary School hill in Jefferson County on Friday, Dec. 6, 2013, in Festus, Mo. The National Weather Service issued winter storm and ice warnings through much of Friday for parts of Texas, Oklahoma, Arkansas, Mississippi, Missouri, Illinois, Indiana and Tennessee. (AP Photo/St. Louis Post-Dispatch, Christian Gooden) ( Cold Snap Missouri )

Matt Wadiak shovels a path on his steps after heavy snowfall moved through the region on Friday, Dec. 6, 2013, in Carbondale, Ill. (AP Photo/The Southern Illinoisan, Steve Matzker) ( Cold Snap Illinois )

Despite cold temperatures, Tyler Kremer, 19, of Sioux Falls, catches some air while snowboarding at Terrace Park in Sioux Falls, S.D. as the sun sets in the background on Thursday evening, Dec. 5, 2013. Winter storm and ice warnings are in effect through much of today for parts of six states in the Midwest. (AP Photo/Argus Leader, Joe Ahlquist) ( Cold Snap South Dakota )

Odessa, Texas Police respond to a rolled over vehicle that crashed on the slick eastbound lanes of Interstate 20, Friday morning, Dec. 6, 2013, in Odessa, Texas. Winter storm and ice warnings are in effect through much of today for parts of six states in the Midwest, including Texas, Missouri, Illinois and Indiana. (AP Photo/Odessa American, Mark Sterkel) ( Cold Snap Texas )

Stephen Lanning, a city of Richardson, employee uses a chain saw to cut limbs from a ice covered tree that fell across a neighborhood intersection, Friday, Dec. 6, 2013, in Richardson, Texas. (AP Photo/Tony Gutierrez) ( Cold Snap Texas )

Ryan Wainwright, 7, leaps out of the way as Jaidyn Richardson, 9, and Kylan France, 11, sled down a hill at Helfrich Hills Golf Course in Evansville, Ind. on Friday, Dec. 6, 2013. (AP Photo/The Evansville Courier & Press, Brien Vincent) ( Cold Snap Indiana )

Jackson Pledger rubs his hands together to warm them in his tent at a homeless encampment west of downtown Oklahoma City, Friday, Dec. 6, 2013. Despite the recent winter storm, some of the homeless do not want to leave their tent to go to a shelter. On Thursday, teams visited homeless camps and urged people there to accept a ride to an indoor shelter. Pledger chose to remain in his tent but volunteers left additional blankets for him to use. (AP Photo/Sue Ogrocki) ( Winter Storm Oklahoma )

Evan Watson, 5, lays in the snow and makes a snow angel as his brothers play football with friends at their home in Evansville, Ind., on Friday morning, Dec. 6, 2013. (AP Photo/The Evansville Courier & Press, Erin McCracken) ( Cold Snap Indiana )

An sports utility vehicle sits crushed in a driveway from ice-covered tree limbs in Paris, Texas, Friday, Dec. 6, 2013. Winter storm and ice warnings are in effect through much of today for parts of six states in the Midwest, including Texas, Missouri, Illinois and Indiana. (AP Photo/The Paris News, Sam Craft) ( Cold Snap Texas )

Jesse Ray, 16, rides his moped to a friend's house on Friday, Dec. 6, 2013, in Owensboro, Ky. A wintry mix struck the western part of Kentucky first but was moving eastward by Friday afternoon, and much of the eastern half of the U.S. was blanketed in precipitation. (AP Photo/The Messenger-Inquirer, John Dunham) ( Cold Snap Kentucky )

Peyton Roberts, 13, of Plano, Texas, slides down a hill at Hoblitzelle Park on December 6, 2013 in Plano, Texas. The ice storm that has hit North Texas has left over 250,000 residents and businesses without power and has led to more than 1,700 flight delays and cancellations across the country. (Photo by Stewart F. House/Getty Images) ( 453983651 )

A pedestrian walks down a street as a flock of birds fly by after heavy snowfall moved through the region on Dec. 6, 2013, in Carbondale, Ill. (AP Photo/The Southern, Steve Matzker) ( Cold Snap Illinois )

Kelley Wing rides on the back of Sonny Dalesandro's snow mobile at Veteran's Park Friday, Dec. 6, 2013, in Tulsa, Okla. Preliminary estimates from the National Weather Service show that much of central and south-central Oklahoma, including Oklahoma City, received 2 to 4 inches of snow overnight. Northern portions of the state, including Enid and Ponca City, saw a dusting of snow. (AP Photo/Tulsa World, Mike Simons) ( Cold Snap Tulsa )

A photographer walks on the beach after a winter storm delivered snow overnight Friday, Dec. 6, 2013, in Newport, Ore. Forecasters expect up to 3 inches of snow on the Oregon coast and up to 10 inches east of the Cascade Range. (AP Photo/The Oregonian, Randy L. Rasmussen) ( Cold Snap Oregon )

Frozen oranges are shown with misters running to avoid as much damage as possible during a cold snap that is affecting the San Joaquin Valley citrus crop Friday, Dec. 6, 2013 in Traver, Calif. Growers across California have toiled this week to protect the state's prized $2 billion a year citrus industry and other key crops such as lettuce and avocados from the cold snap that engulfed the state, dropping temperatures to levels that can damage fruit and delay the harvest of greens. (AP Photo/Gary Kazanjian) ( Cold Snap Winter Crops )

Olivia Aurs, 9, dumps a handful of snow on her three year-old brother, Alex Aurs' head as they play in the snow in the Lakeside Terrace subdivision in Evansville, Ind. on Friday morning, Dec. 6, 2013. Alex was adopted from China last year by the family, and this was his very first experience with snow. (AP Photo/The Evansville Courier & Press, Erin McCracken) ( Cold Snap Indiana )

Sarah Davis, left, and John Davis, right, try to stay warm in their in their tent at a homeless encampment in Oklahoma City, Friday, Dec. 6, 2013. Despite the recent winter storm, they do not want to leave their tent to go to a shelter. Oklahoma Gov. Mary Fallin declared a state of emergency for all 77 counties Thursday as the first storm moved across the state. (AP Photo/Sue Ogrocki) ( Winter Storm Oklahoma )

From left, Rishi Gottikonda, Hareendra Bandaru and Revathi Irrigineni play in the snow for the first time ever in their lives after heavy snowfall moved through the area on Dec. 6, 2013, in Carbondale, Ill. (AP Photo/The Southern, Steve Matzker) ( Cold Snap Illinois )