MAJOR sudden stratospheric warming (#SSW) is not done yet...

Secondary warming over Russia will aid further disruption to the split #PolarVortex. The polar vortex seems to have no signal for recovery. There are early signs of tropospheric impacts. Graphic source: @wxcharts pic.twitter.com/A62vdE9G63

— Scott Duncan (@ScottDuncanWX) January 2, 2019