The ECMWF and Met Office seasonal models are still the most bullish on a weak 10mb polar vortex in November through January, but interestingly neither expects the disruption to percolate down to the lower stratosphere and the troposphere. Data courtesy of @CopernicusECMWF https://t.co/JGyUO7Kpgx pic.twitter.com/A5GzlbSUmC

— World Climate Service (@WorldClimateSvc) October 14, 2021