Frigid temperatures are expected to impact much of the central and eastern United States in the coming weeks. The first of three polar vortex systems is expected this month, according to AccuWeather.

The long-range data shows we may be done with a true Arctic air mass similar to what we experienced in January. But we certainly aren’t done with normal cold yet. There are two opposing forces ...

WASHINGTON (AP) — Warm Arctic waters and cold continental land are combining to stretch the dreaded polar vortex in a way that will send much of the United States a devastating dose of winter weather ...