NASA Ozone Watch’s current Arctic wind product forecasts the 60°N zonal-mean wind at 10 hPa falling from 22.12 m/s (49.5 mph) on October 25, 2026, to 4.15 m/s (9.3 mph) by November 3, compared with a climatological mean of 25.97 m/s (58.1 mph) for November 3. A few European forecast models go further and reverse the winds, but said that outcome remains unlikely and Canadian surface impacts are not established.
Arctic stratospheric polar vortex forecast to weaken sharply in early November
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