A polar vortex is affecting millions of Americans this week who live in the Midwest, Northeast and Southeast with recording-breaking freezing cold temperatures.
What exactly is a polar vortex? It’s when winds from the North Pole – which typically has its circulation contained in the Arctic – slide farther south into the Northern Hemisphere. The result of the polar vortex distortion is unusually frigid weather across North American, Europe and Asia.
Unlike a single storm, such as a blizzard or hurricane, the cold snap brought on by a polar vortex has greater longevity and breadth. Furthermore, the arrival of a polar vortex distortion can actually cause storms. The distortion that’s occurred over the last several days is partially to blame for the nor’easter that hit late last week.
Although it seems counterintuitive, the abnormal cold facing much of the U.S. on Tuesday could very likely be a result of global warming. The polar vortex, much like other extreme weather events, could be caused by Earth’s overall warming. When the jet stream is distorted, heat waves – and cold fronts – can result.
A shocking total of 26 states were under wind-chill warnings or watches today in the U.S. The Upper Midwest states were preparing for the worst, as temperatures were expected to reach around 36-below zero, with a wind chill temperature near 60-below. The temperature is gradually expected to rise over the course of the day and into Wednesday, reaching the 30s and 40s by Friday.
– Chelsea Regan
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