I'm saying it again: what is going on at 1 hPa?

25 Dec fcst: ECMWF has E-lies from tropics to pole AND -30 m/s u at ~80N
GFS does not have these continuous E-lies and polar winds barely at -10 m/s

This is impacting their different forecasts at 10 hPa. pic.twitter.com/jS7dQjwndU

— Hannah Attard (@HannahAttard) December 20, 2018