Heavy snow, freezing rain and gusty winds blanketed the central U.S. on Wednesday from a powerful winter storm, threatening to make travel all but impossible and potentially cutting off electricity to millions of Americans.

Winter and ice storm warnings and watches were in effect until Friday morning for much of the U.S.A., beginning in Texas and Colorado and moving into northern New York and the Midwest, the National Weather Service (NWS) said.

More than 30 inches of snow for a large part of the northern part of the region could fall while some snow and freezing rain for the south could bring significant worsening of travel conditions on Wednesday, the NWS said.

Wind gusts of up to 64 kilometers per hour were predicted as well.

“Expect power outages and tree damage due to the ice. Travel could be impossible. The hazardous conditions could impact the morning or evening commute,” the service said in its Memphis indication.

More than 100 million people have been in winter weather warnings from the Rockies to New England, CNN reported.

In the U.S. about 2.400 flights had been canceled as of Wednesday morning, according to Flightaware.com.

400 flights in and out of Chicago’s two main airports alone were cancelled amid predictions of up to a foot of snow for parts of the subway area.

National Weather Service

The National Weather Service is an agency of the United States federal government that is tasked with providing weather forecasts, warnings of hazardous weather, (wikipedia)

National Weather Service Chicago, Illinois

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National Weather Service Chicago, currently based in Romeoville, Illinois, is a weather forecast office responsible for monitoring weather conditions for 23 counties in Northern Illinois, (wikipedia)