🔴 A weaker than normal stratospheric polar vortex continues to be shown by the ECMWF in late October/early November 🔴

It will be interesting to see if more high latitude blocking occurs in mid-to-late fall, increasing the chance for cold spells across the mid-latitudes 🥶 pic.twitter.com/UEsdOTPtuN

— Ben Noll (@BenNollWeather) September 28, 2021