In February 1971, Oklahoma faced its most severe snowstorm on record, as a powerful storm delivered an unprecedented three feet of snow to northwest Oklahoma. What is often referred to as "the big one" in some previous reporting still leaves a windy chill on residents.

The multi-day winter storm has moved east through Oklahoma, with another round of snow blanketing the state, making travel treacherous.

Some Oklahoma schools have already announced their plans for Monday as a winter storm blanketed the state in snow and ice.

Airlines have canceled more than 13,000 U.S. flights for Saturday and Sunday as a massive winter storm is forecast to bring a mix of ice, snow and frigid conditions to many parts of the country this weekend.

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The state asked residents and business owners who have been affected by the winter storms to report damages online at damage.ok.gov.

The National Weather Service calls the system "a significant long-duration winter storm," which is expected to bring heavy snow, sleet, and freezing rain from the southern Rockies to New England. The storm will last into Monday across much of the U.S. and into Tuesday in the Northeast, the NWS said.