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The polar vortex has been “considerably stronger” than usual this year, according to Laura Ciasto, a meteorologist with NOAA’s Climate Prediction Center, which should keep record-breaking ...
Climate change in Antarctica, 2023–2024 El Niño event The 2024 Antarctica heat wave refers to a prolonged and significant mid- winter increase in Antarctic temperatures compared to prior winters, causing several regions of Antarctica to reach temperatures 10 °C (18.0 °F) above normal in July 2024, up to a 28 °C (50.4 °F) increase above ...
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.
During the 2014 January polar vortex, more than 20 people across the country died from the cold as places like Georgia — which rarely see serious cold — dealt with lows under 10 degrees ...
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.
Late in 2020 and early in 2021, AccuWeather meteorologists warned that a weakening of the polar vortex was coming and a major southward discharge of cold air would follow during the second half of ...
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 ...
Obviously this isn’t the first polar vortex episode of the winter, but it looks to be the most severe.” 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 poles, Cohen said.