Map showing the December 2021 ranking of 500 mb heights compared to all Decembers since 1949. The area of the N. Pacific just south on the Alaska Peninsula had the greatest monthly standardized departure on record for any month, not just Decembers. @AlaskaWx pic.twitter.com/Kt3U9XM4F5

— Brian Brettschneider (@Climatologist49) January 4, 2022