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The 1985 North America cold wave [1] was a meteorological event which occurred in January 1985 as a result of the shifting of the polar vortex farther south than is normally seen. [1] Blocked from its normal movement, polar air from the north pushed into nearly every section of the central and eastern half of the United States and Canada ...
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 ...
A polar low is a small-scale, symmetric, short-lived atmospheric low-pressure system (depression) that is found over the ocean areas poleward of the main polar front in both the Northern and Southern Hemispheres. The systems usually have a horizontal length scale of less than 1,000 kilometres (620 mi) and exist for no more than a couple of days.
The polar vortex played a role in the extreme winter weather outbreak that struck Texas in February 2021, UN weather experts said. “We did have a sudden stratospheric warming in January ...
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 ...
Records are being shattered and communities are enduring the harshest cold in decades as the polar vortex tightens its grip on the midwestern United States.
Major SSWs occur when the winter polar stratospheric westerlies reverse to easterlies. In minor warmings, the polar temperature gradient reverses but the circulation does not, and in final warmings, the vortex breaks down and remains easterly until the following boreal autumn". [3]
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