The Arctic Oscillation has positive and negative phases. During a positive phase, the upper-level polar winds are strong, reducing the likelihood of Arctic air spilling south.

An Arctic air mass kept its grip on much of the central and eastern U.S. on Friday, plunging temperatures to record lows as snow blanketed central Colorado and the Pacific Northwest braced for an ...

(CBS DETROIT) — An arctic air mass will impact all of southeast Michigan through Wednesday as the coldest temperatures of the winter so far arrive this week. A cold weather advisory is in effect ...

Arctic blast brings dangerously cold air and snow. Snow showers will be persistent and widespread, with near white-out conditions at times. Get the latest forecast from the FOX 17 Weather team.

In Atlanta, highs will be in the 30s for the first half of next week but could recover later in the week. Nighttime lows will be mainly in the 20s Monday and beyond when the arctic air arrives.

Blast of Arctic air to bring dangerously cold temperatures, wind chills to New England this week By Ken Mahan and Dave Epstein Globe Staff and Globe Correspondent, Updated January 19, 2025, 4:17 p.m.

A blast of Arctic air is expected to arrive in Mississippi soon as the Arctic jet stream pushes farther South than usual and allows air from as far as Siberia to move into the U.S., according to ...