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Polar vortex. A circumpolar vortex, or simply polar vortex, is a large region of cold, rotating air; polar vortices encircle both of Earth's polar regions. Polar vortices also exist on other rotating, low- obliquity planetary bodies. [1] The term polar vortex can be used to describe two distinct phenomena; the stratospheric polar vortex, and ...
The 2022–23 North American winter was an unusually warm winter for the east and an unusually cold winter for the west in North America, as it occurred across the continent from late 2022 to early 2023. The winter season in North America began at the winter solstice, which occurred on December 21, 2022, and it ended at the March equinox, which ...
The January 13–16, 2024 North American winter storm brought wide-ranging and significant impacts across much of the continental United States, particularly in the Southern regions of the country. Originating as an extratropical cyclone over the northeastern Pacific Ocean on January 12, the system, unofficially named Winter Storm Heather by ...
The polar vortex, which is a storm at the jet stream level of the atmosphere, has kept frigid air pent up above the Arctic Circle for much of the winter. When the polar vortex remains strong as it ...
The outbreak in mid- to late December heavily focused on areas west of the Appalachians in the Central states. For the Northeast, as well as a large swath of eastern Canada, this will be an Arctic ...
Behind the storm, an arctic blast from the polar vortex will send temperatures plunging to potentially record lows for much of the country. Behind the storm, an arctic blast from the polar vortex ...
The February 13–17, 2021 North American winter storm was a crippling, large and major winter and ice storm that had widespread impacts across the United States, Northern Mexico, and parts of Canada from February 13 to 17, 2021. The storm, unofficially referred to as Winter Storm Uri by the Weather Channel, [ 14 ][ 15 ] started out in the ...
A sudden stratospheric warming (SSW) is an event in which polar stratospheric temperatures rise by several tens of kelvins (up to increases of about 50 °C (90 °F)) over the course of a few days. [1] The warming is preceded by a slowing then reversal of the westerly winds in the stratospheric polar vortex, commonly measured at 60 ° latitude ...