Severe weather is expected to bring subzero temperatures the northern Plains as soon as Thursday, then reach the Mississippi Valley, the Northeast and the Ohio Valley by Sunday.

A potentially historic, massive winter storm will slam more than half of the United States today, moving east as it brings heavy snow, widespread ice accumulation and dangerous cold.

“As of now, that snow starts at some point on Sunday, either morning or afternoon, it does look like by Sunday afternoon and evening, snow accumulation is underway and looks to peak Sunday night, and ...