Polar vortex status

The SPV is currently marginally weaker than ERA5 average and is forecasted to remain weaker than average (according to GEFS-mean) 9 of 31 members have stronger vortex than average at the last forecast step (2026-06-22T00:00:00) . The zonal mean zonal wind at 10 hPa 60N is today (GFS analysis): -11.0 m/s Weakest zonal wind at 10 hPa 60N in ERA5 record for todays date is: -15.9 m/s 1997 Strongest zonal wind at 10 hPa 60N in ERA5 record for todays date is: -6.9 m/s 1981