We're seeing the biggest negative mountain torque of 2018-19 so far, favoring weaker westerly jets. Hence, there's -AAM now showing up ~30-45N a week after the -MT developed in late Oct. Cold surge east of the Rockies next week will produce a +MT that's often followed by a +NAO pic.twitter.com/7nhTsxApVD

— Eric Webb (@webberweather) November 6, 2018