Extreme cold, arctic air becoming more likely across eastern half U.S. last week Jan. MJO forcing semi-persistent across c-w Pacific driving pattern. Super ensemble 11-14 day unusually high 96% correlation strong -EPO & cold East trough. MJO suggests -NAO so even colder argument! pic.twitter.com/ad4qqX5XOf

— Jim Bishop (@StormgasmJim) January 13, 2022