tornando a noi:

The strat. vortex is currently stronger than all other years in the ERA interim record!!!
The zonal mean zonal wind at 10 hPa 60N is today (GFS analysis): 24.9 m/s
Weakest zonal wind at 10 hPa 60N in ERA interim record for todays date is: 12.3 m/s 2003
Strongest zonal wind at 10 hPa 60N in ERA interim record for todays date is: 24.5 m/s 1996