Biggest signal yet of the Polar Vortex being dramatically weakened in the short term. Pacific Jet being a big part of it spawning Aleutian lows putting a wrench in stratospheric winds. No Kara Sea or Scandinavian High hurts and would be why no SSW happens pic.twitter.com/y9sE5WDw5G

— Logan Giles (@LoganGilesWx) December 21, 2023