Real-time forecasts
Nominal start dates | ECMWF | Météo-France | Met Office(a) | DWD | CMCC | NCEP | JMA | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
System 4 | SEAS5 | System 5 | System 6 | System7 | system=12 | system=13 | system=14 | system=15 | GCFS2.0 | GCFS2.1 | SPSv3 | SPSv3.5 | CFSv2 | CPS2 | |
September 2017 - October 2017 | |||||||||||||||
November 2017 - January 2018 | |||||||||||||||
February 2018 - April 2018 | (1) | ||||||||||||||
May 2018 - October 2018 | |||||||||||||||
November 2018 - April 2019 | (3) | ||||||||||||||
May 2019 - September 2019 | (2) | ||||||||||||||
October 2019 - April 2020 | |||||||||||||||
May 2020 - September 2020 | |||||||||||||||
October 2020 - present |
(1) Upgrade on data provision: changes in set of parameters available, see column noted with 'C3S-0.1 netcdf' in this link. Data deficiencies fixed, see known issues D2 and D3.
(2) Upgrade to model version: GloSea5-GC2-LI. Data deficiencies fixed, see known issue D9.
(3) Hindcast period is extended to 2016.
Hindcasts
Nominal start date | ECMWF | Météo-France | Met Office(a) | DWD | CMCC | NCEP | JMA | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
System 4 | SEAS5 | System 5 | System 6 | System 7 | system=12 | system=13 | system=14 | system=15 | GCFS2.0 | GCFS2.1 | SPSv3 | SPSv3.5 | CFSv2 | CPS2 | |
January | |||||||||||||||
February | |||||||||||||||
March | |||||||||||||||
April | |||||||||||||||
May | |||||||||||||||
June | |||||||||||||||
July | |||||||||||||||
August | |||||||||||||||
September | |||||||||||||||
October | |||||||||||||||
November | * | * | * | ||||||||||||
December | * | * | * | * |
(a) NOTE: For the Met Office contribution, due to the production of hindcasts "on-the-fly", the CDS keyword 'system' does not have the same meaning as for the other contributors. Instead, it is just an indexing label that gets changed once per year.
NOTE
*
Currently these data are temporarily only available using CDS API and may appear as (partially or totally) unavailable in the CDS interactive forms.
Nominal Start Dates
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)
Nominal start month | Dates used for C3S products | Additionally available dates |
---|---|---|
JANUARY | 1 January; 27, 22 and 17 December | 12, 7 and 2 December |
FEBRUARY | 31, 26, 21 and 16 January | 11 and 6 January |
MARCH | 25, 20, 15 and 10 February | 5 February |
APRIL | 1 April; 27, 22 and 17 March | 12, 7 and 2 March |
MAY | 1 May; 26, 21 and 16 April | 11 and 6 April |
JUNE | 31, 26, 21 and 16 May | 11 and 6 May |
JULY | 30, 25, 20 and 15 June | 10 and 5 June |
AUGUST | 30, 25, 20 and 15 July | 10 and 5 July |
SEPTEMBER | 29, 24, 19 and 14 August | 9 and 4 August |
OCTOBER | 28, 23, 18 and 13 September | 8 and 3 September |
NOVEMBER | 28, 23, 18 and 13 October | 8 and 3 October |
DECEMBER | 27, 22, 17 and 12 November | 7 and 2 November |
JMA:
- Forecasts: 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
- Note that even though just the most recent 52 members are used for C3S products (4 start dates), the complete set of members are available through the CDS
- Hindcasts: nominal month M includes the members initialised on the 2 available start dates from month M-1 (or 1 start date from month M-1 and the 1st of month M when the latter is available)
See details about available dates from JMA at section 6 (Other relevant information) of the forecasting system description