What's driving the pattern? El Nino. Panhandle track. MJO warm phase. Siberian high interacts w/ Himalayas. Waves propagate ^ upper atmos influencing polar vortex weakening. Stratospheric warming ongoing. MJO cooler phase soon>west ridge>Greenland ridge. All point to colder Jan pic.twitter.com/mf5ADxU1qK

— Scott Sabol, Meteorologist CBM/CCM (@ScottSabolFOX8) December 13, 2023