Frigid temps blanket the U.S.

A drop in the jet stream sent temperatures across the United States plummeting. The pronounced change in temperatures can be seen in this weather data from NOAA/NCEP's Real-Time Mesoscale Analysis. Areas colored blue are below freezing. National Oceanic and Atmospheric Administration video. (Jan. 24, 2013)

The best of Newsday everyday in your inbox. Get the Newsday Now newsletter!