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

The strat. vortex is currently marginally weaker than ERA interim average 
and is forecasted to become stronger than average (according to GEFS-mean)
17 of 31 members have stronger vortex than average at the 
last forecast step (2021-05-23 12:00:00)

The zonal mean zonal wind at 10 hPa 60N is today (GFS analysis): -6.1 m/s 
Weakest zonal wind at 10 hPa 60N in ERA interim record for todays date is: -16.6 m/s 2019 
Strongest zonal wind at 10 hPa 60N in ERA interim record for todays date is: 2.2 m/s 1981