All GEFS members agree on a strong stratospheric polar vortex over the next two weeks. 10hPa zonal mean zonal wind could reach ERA-maximum values around February 18th. The latest ECMWF is in agreement - this thing is a behemoth. #beastmode pic.twitter.com/huZE6ejY1l

— John Homenuk (@jhomenuk) February 11, 2020