Planned changes to contributions to C3S seasonal forecasting systems

Environment and Climate Change Canada (ECCC) contribution to C3S will update one of its seasonal forecasting system to a new version, GEM5-NEMO, from December 2021

  • Hindcast data for December start dates from this new system will be available at the CDS during the week commencing on the 6th of December.
  • Real-time forecast data for December 2021 will be published on 13th December at 12GMT.
  • With the introduction of the new system, GEM5-NEMO, the contribution from the current GEM-NEMO system will be discontinued


Japan Meteorological Agency (JMA) contribution to C3S will update their forecasting system to a new version, CPS3, from February 2022

  • Hindcast data for February start dates from this new system will be available at the CDS on January 2022 (date to be confirmed). 
  • Real-time forecast data for February 2022 will be published on 13th February at 12GMT
  • With the introduction of the new system, CPS3, the contribution from the current CPS2 system will be discontinued.