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Winter storm Boreas has already dumped up to a foot of snow in western and southwestern Oklahoma as it makes its trek across the US.

The massive storm has caused mass flooding, car crashes, hundreds of flight cancellations, road closures and leading to at least 13 deaths as it trekked across New Mexico and Texas on Saturday.

An improperly restrained 4-year-old girl was killed in a rollover accident in New Mexico and three more people died in a weather-related crash in the Texas Panhandle.

Meteorologists expect the Arctic mass to head south and east, threatening travel plans for Tuesday and Wednesday, two of the busiest travel days of the year.

By early Sunday, the weather was blamed for at least eight deaths in several fatal traffic accidents. The storm has caused hundreds of rollover accidents, including one that injured three members of singer Willie Nelson’s band when their bus hit a pillar near Dallas.

Update on band bus wreck: No one suffered serious injuries. 4 November shows postponed. Read more details here: http://t.co/b9MdRmZGRf

— Willie Nelson (@willienelson) November 23, 2013

The National Weather Service has issued a winter storm warnings across Texas and Oklahoma until midday Monday. The system is expected to bring wintry conditions into the Southern Plains, Southeast and finally reach the Northeast during the next five days.

Roads are getting bad fast. Snow/Sleet to intensify in coming hours in OKC. #okwx

— Brad Sowder (@BradSowderWX) November 24, 2013

Boreas is expected to keep temperatures 15 to 20 degrees below normal along the East Coast through Thursday. Even if the system fails to deliver heavy snow, it could cause air travel disruptions with high winds, forecasters say.

Image via Twitter