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The culprit is the dreaded polar vortex, a climate phenomenon associated with bitter cold snaps that usually have the good sense to occur during late fall or winter.
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), USA Today previously reported. It's a normal ...
Pacific Northwest, Northern Plains, Midwestern United States, Northeastern United States, Southern Canada: $525 million 2 Late January winter storm: January 24 – 27 N/A N/A N/A 998 14.5 (37) N/A Northern Plains, Upper Midwest, Ohio Valley, New England: $120 million None Groundhog Day nor'easter: January 25 – February 4 Category 3 6.188 125 ...
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 ...
In late December, a strong Arctic air mass, due to the weakening of the Northern Polar vortex, came and established from Canada into the Midwestern and Northeastern United States with the core of the cold centered in the Upper Midwest, Interior Northeast, and Eastern Canada. Temperatures were 10 to 20 °F (6 to 11 °C) below average for that ...
Another player in the winter forecast is the polar vortex. Based on data from previous winters with a similar setup to the upcoming season, Pastelok said that February is the most probable time ...
When the polar vortex is strong, the mid-latitude Westerlies (winds at the surface level between 30° and 60° latitude from the west) increase in strength and are persistent. When the polar vortex is weak, high-pressure zones of the mid-latitudes may push poleward, moving the polar vortex, jet stream, and polar front equatorward. The jet ...