This wavenumber-3 high-latitude ridge pattern is truly classic for dumping arctic air into the E 2/3rds of the CONUS.
— Sam Lillo (@splillo) November 28, 2017
Winter storm potential less certain however. Momentum flux convergence w/in E US large scale trough (WAF div), hard for s/w's to amplify pic.twitter.com/pNt7pdmRVP