A severe winter storm is expected to bring a glaze of ice, dangerously cold temperatures, and potentially a foot of snow to Oklahoma starting Friday.

A massive winter storm bearing down on the East Coast this weekend is expected to bring heavy snow and subzero temperatures to New York.

At least 14 states and the District of Columbia declared weather emergencies as of Friday morning, and major U.S. airlines warned passengers to stay alert for abrupt flight changes and cancellations.