Regardless if we see wave 1 or wave 2 disruption of the polar vortex (PV) in the coming weeks, the Scandinavian ridge is a quintessential feature to both forcing regimes. Its persistence will continue to favor an unsettled PV & may pay later dividends for a mid-winter SSWE/-AO pic.twitter.com/tUFgwahQND

— Eric Webb (@webberweather) November 8, 2018