Polar Vortex Weakens: Arctic Blast to Freeze Northeast

The polar vortex is set to be impacted by a sudden stratospheric warming event, which is predicted to bring freezing temperatures to the Northeast region throughout February. This phenomenon follows a significant winter storm in late January that caused temperatures to plummet well below average across much of the United States.

A Sudden Stratospheric Warming occurs annually in winter, characterized by rapid temperature increases in the Arctic stratosphere. This event causes the polar vortex, a system of high-altitude winds, to weaken, split, or even reverse its direction. As a result, frigid Arctic air can then penetrate southward into North America and Europe.

While much of the North will continue to experience cold weather, the first half of the current week may feel slightly milder. However, an Arctic front is anticipated to move into the Great Lakes and Northeast later this week, ushering in more snow and plunging temperatures back into freezing levels.