There's a significant cold bias in the CFSv2 Week 3+ 50mb temperatures to consider when interpreting this Week-5 50mb temperature anomaly (shading) and geopotential heights (contours) plot. 50mb temperature anomalies +5-6C at the 5-week lead spells significant strat warming pic.twitter.com/gqIQu3bcUc

— Mike Ventrice (@MJVentrice) November 21, 2018