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"A shift of the polar vortex will be at the heart of the brief cold blast in the Northeast," AccuWeather Chief On-Air Meteorologis. ... January 30, 2023 at 9:41 AM. 1 / 7.
That means arctic air is blasting over the US, while pressure changes and the motion of the polar vortex whip up high winds and create a perfect recipe for wintry weather.
A stretched polar vortex like this one happens lower in the atmosphere and is different than when the polar vortex has sudden warming, weakens and all the cold air escapes south and out of the ...
The potentially life-threatening cold is due to a disrupted polar vortex. The FOX Forecast Center said a lobe of the polar vortex will dip to the south and move into the U.S. this weekend and into ...
The radiative cycle in the stratosphere means that during winter the mean flow is westerly and during summer it is easterly. A final warming occurs on this transition, so that the polar vortex winds change direction for the warming and do not change back until the following winter.
An illustration of the polar jet stream and the polar vortex in the layers of atmosphere above the northern hemisphere shows the elongated shape of the vortex on Jan. 16, 2025.
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 ...
The polar vortex, which is a storm at the jet stream level of the atmosphere, has kept frigid air pent up above the Arctic. ... February 1, 2023 at 12:37 PM. 1 / 6.