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In Rapid City, South Dakota, 15.9 inches (40 cm) of snow fell, of which 14.5 inches (37 cm) fell in just one day, breaking the one-day and two-day November snowfall records respectively. In the northern Black Hills, a local mountain range, over two feet of snow fell. One person was killed in a rollover crash near Cavour.
The polar vortex as captured by the Atmospheric infrared sounder. Normally, the Northern Hemisphere jet stream travels fast enough to keep the concentration of Arctic air known as the "polar vortex" stationary in the stratosphere over the North Pole.
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.
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 ...
The polar vortex is expected to strengthen in the short term and maintain warmer conditions in eastern North America for the foreseeable future, according to Atmospheric and Environmental Research.
The polar vortex is extensive coverage of low pressure and cold air surrounding Earth’s poles. When the vortex is strong and stable, the polar jet stream shifts northward, keeping the cold air ...
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]
Polar vortex. It's a phrase that becomes very popular has achieved buzzword status and is often used frequently during the winter as the Northern Hemisphere endures its coldest months of the year ...