The Stratospheric Polar Vortex will likely be a highly influential player for circulation about the Northern Hemisphere as we move into the start of Winter.
+NAM anomalies extending down from the stratosphere... It's why we see the 15d agg 500Hanom pattern configured as it is. pic.twitter.com/KrBiIS2kpp

— Mike Ventrice (@MJVentrice) November 23, 2020