Will the weakening polar vortex impact Canada’s winter? Here’s what experts say
- NASA Ozone Watch forecasts the Arctic polar vortex will weaken sharply in early November, with wind speeds at 10 hPa projected to fall from 22.12 m/s to 4.15 m/s by November 3.
- Dr. Judah Cohen, an atmospheric scientist at the Massachusetts Institute of Technology, called the event "almost undoubtedly, the largest, earliest disruption of the polar vortex on record."
- Although some models indicate a "sudden stratospheric warming" where winds reverse direction, the outcome remains uncertain and does not guarantee widespread cold across the United States.
- Changes can take two to six weeks to descend through the atmosphere, potentially reshaping the jet stream from late November into December, according to the Polar Vortex Earth monitor.
- Research meteorologist Dr. Christoph Gatzen at Western University noted that an early weakening is "notable" but not concerning, advising residents prepare as they would for any other winter.
48 Articles
48 Articles
Despite the striking historical reference, the scenario does not point to an extreme cold eruption in our country
Record Weakening Of Arctic Polar Vortex Unlikely To Trigger U.S. Deep Freeze
Winds high above the Arctic are slowing down at a record pace this week, defying the usual autumn buildup of the polar vortex, and meteorologists say Americans likely will not face a severe Arctic blast as a result. Forecast models show winds within the stratospheric polar vortex dropping to 9 mph on Nov. 3. That […] Record Weakening Of Arctic Polar Vortex Unlikely To Trigger U.S. Deep Freeze
Historic polar vortex disruption could influence Midwest weather late this year
ST. LOUIS -- Meteorologists are closely watching what could become one of the earliest major Sudden Stratospheric Warming (SSW) events on record. Forecast models are indicating a dramatic weakening, and possibly a temporary reversal of winds high above the Arctic during the first half of November. If the event occurs as predicted, it could disrupt [...]
Meteorologists are looking for the evolution of the polar vortex, an atmospheric phenomenon that can influence temperatures in Europe in the coming months. Polar vortex is an atmospheric phenomenon that forms over the Arctic region, at about 30 kilometers altitude. It helps to keep the air very cold near the North Pole. Forecasts for the beginning of November indicate the possibility of weakness ...
If the phenomenon is not rare, its "appearance from the beginning of November would be exceptional", says the Weather Chain.
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