####------------------------------------ Polar vortex status ------------------------------------###

The strat. vortex is currently stronger than ERA interim average 
and is forecasted to remain stronger than average (according to GEFS-mean)
24 of 31 members have stronger vortex than average at the 
last forecast step (2020-12-14 12:00:00)

The zonal mean zonal wind at 10 hPa 60N is today (GFS analysis): 43.3 m/s 
Weakest zonal wind at 10 hPa 60N in ERA interim record for todays date is: 4.7 m/s 2000 
Strongest zonal wind at 10 hPa 60N in ERA interim record for todays date is: 46.0 m/s 2011