Follow live updates as a winter storm is expected to bring heavy snowfall, icy roads and cold temperatures from the southern states to the Northeast.

As the U.S. prepares to take on another bout of cold weather, the term "polar vortex" is getting thrown around. But what is it?

On Friday at 12:15 p.m. the National Weather Service issued a cold weather advisory valid from 7 p.m. until Saturday 11 a.m. for Central Douglas County.

Minnesota’s Weather Authority remains in Forecast First Alert mode as we continue through a dangerous stretch of extreme cold.This morning’s low temperature at MSP dropped to -21°, making it the coldest temperature we’ve seen in nearly seven years,

Boston has declared a cold emergency as arctic temperatures are set to arrive on Friday. The emergency is for Friday, January 23, through Sunday, January 25, due to the extreme cold weather forecasted for this time period. Boston is forecasted to experience wind chills reaching as low as -10 degrees Friday night into Saturday.

Record cold will push into the U.S. this week, bringing brutal and potentially life-threatening conditions for millions across the central and eastern parts of the country.

Bundle up if you need to go outside on Tuesday morning. Sub-zero wind chills are possible in the area. A cold weather advisory is in effect for the region until 10 a.m. Jan. 20. "Very cold wind chills as low as 10 below zero expected," according to the statement issued by the National Weather Service in Wilmington.