Polar vortex status

The SPV is currently weaker than ERA5 average and is forecasted to remain weaker than average (according to GEFS-mean) 4 of 31 members have stronger vortex than average at the last forecast step (2026-04-09T12:00:00) . The zonal mean zonal wind at 10 hPa 60N is today (GFS analysis): -1.9 m/s Weakest zonal wind at 10 hPa 60N in ERA5 record for todays date is: -12.8 m/s 1986 Strongest zonal wind at 10 hPa 60N in ERA5 record for todays date is: 49.0 m/s 1997