Polar vortex status

The SPV is currently stronger than ERA5 average and is forecasted to remain stronger than average (according to GEFS-mean) 31 of 31 members have stronger vortex than average at the last forecast step (2026-09-07T12:00:00) The SSW probability in GEFS is: 45%. The zonal mean zonal wind at 10 hPa 60N is today (GFS analysis): 0.0 m/s Weakest zonal wind at 10 hPa 60N in ERA5 record for todays date is: -3.7 m/s 2019 Strongest zonal wind at 10 hPa 60N in ERA5 record for todays date is: 0.9 m/s 2015