Summary of available data

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Currently these data are only available using CDS API and may appear as (partially or totally) unavailable in the CDS interactive forms.

For systems with lagged ensembles having multiple start dates, the "nominal" start date is assigned as follows:

Météo-France (all systems):

• Forecasts/Hindcasts: nominal month M includes the members initialised in the last weeks of month M-1 and on the 1st of month M

NOTE: Even though the different members of all Météo-France forecasting system ensembles are initialized using a lagged approach, the real start dates are not revealed to the users, so all members are encoded as if they were initialized on the 1st of the month

GloSea5-GC2:

• Forecasts: nominal month M includes the members initialised on the 1st of month M and all available members with start dates back to, and including, the 2nd of month M-1
  • Note that even though just the most recent 50 members are used for C3S products, the complete set of members are available through the CDS
• Hindcasts: nominal month M includes the members initialised on the 1st of month M and on the 25th, 17th and 9th of month M-1

NCEP:

• Forecasts: nominal month M includes the members initialised on the 1st of month M and all available members with start dates back to, and including, the 2nd of month M-1
  • Note that even though just the most recent 52 members are used for C3S products, the complete set of members are available through the CDS
• Hindcasts: nominal month M includes the members initialised on the 1st of month M (if available) and on all start days from month M-1 except the 1st (see table below)