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The 2013–14 North American winter was one of the most significant for the United States, due in part to the breakdown of the polar vortex in November 2013, which allowed very cold air to travel down into the United States, leading to an extended period of very cold temperatures.
The cities of Billings, Montana, and Fargo, North Dakota, experienced their longest streak of sub-zero (0 °F [−18 °C]) temperatures since at least 1983 and 1996, respectively. [ 16 ] [ 17 ] [ 18 ] Des Moines, Iowa , experienced its sixth-coldest February on record with an average temperature of 15.2 °F [−9.3 °C]. [ 19 ]
There were greater accumulations of snow across parts of Oklahoma as well. [2] A quasi-permanent phenomenon referred to as the polar vortex may have been partly responsible for the cold weather. Temperatures in much of the United States dropped 15 to 35 °F (8.3 to 19 °C) below average by November 19, following a southward "dip" of the polar ...
The polar vortex is a gigantic, circular area of cold air high up in the atmosphere that typically spins over the North Pole (as its name suggests). The polar vortex is a gigantic, circular area ...
AccuWeather forecasters break down the science behind the polar vortex and how it can influence the weather for locations thousands of miles away. While the name for this phenomenon may sound ...
The polar vortex is a large area of low-pressure and cold air surrounding both of the Earth’s poles, according to the weather service. It always exists near the poles.
Starting in late December as a result of the southward shift of the polar vortex, extremely cold conditions froze the eastern United States in the last few days of 2017 as well as into the new year. Following a brief respite in mid-January, cold temperatures swung back into the eastern U.S. shortly afterwards.
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