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Brutal winters may be in store for the portions of North America as the polar vortex continues to weaken and shifts, according to a new study. Weakening polar vortex may yield longer, harsher ...
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 ...
Several frigid days in Rochester in January were attributed to an intrusion of arctic air caused by a weak polar vortex. — Steve Howe reports on weather, climate and the Great Lakes for the ...
A stretched polar vortex event played a significant role in the Arctic outbreak that froze Texas in February 2021, killing more than 200 people, according to a 2020 study.
The northern hemisphere and the southern hemisphere each have a polar jet around their respective polar vortex at around 30,000 ft (5.7 mi; 9.1 km) above sea level and typically travelling at around 110 mph (180 km/h) although often considerably faster. [2] Closer to the equator and somewhat higher and somewhat weaker is a subtropical jet. [2]
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] However, this classification is based on the NH SSWs, as no major SSW by this definition has been observed in the SH in winter.
The polar vortex is a large area of cold air and low pressure that normally spins over the North and South Poles. During the winter months and when the jet stream allows, this cold air can drop ...
Brutal winters may be in store for the portions of North America as the polar vortex continues to weaken and shifts, according to a new study.