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⁽⁴⁾ From March 2023 a dataset with ocean variables is available from the CDS catalogue (see details on availability here).

Hindcasts

Nominal start date	ECMWF			Météo-France					Met Office(a)									DWD			CMCC		NCEP	JMA		ECCC					BOM	Nominal start date
	System 4 (system=4)	SEAS5 (system=5)	SEAS5  (system=51)(b)	System 5 (system=5)	System 6 (system=6)

System7

System 7 (system=7)

System8

System 8 (system=8)	System 9 (system=9)	GloSea5-GC2 (system=12)	GloSea5-GC2 (system=13)	GloSea5-GC2-LI (system=14)	GloSea5-GC2-LI (system=15)	GloSea6 (system=600)	GloSea6 (system=601)	GloSea6 (system=602)	GloSea6 (system=603)	GloSea6 (system=604)	GCFS2.0 (system=2)	GCFS2.1 (system=21)	GCFS2.2 (system=22)	SPSv3  (system=3)	SPSv3.5 (system=35)	CFSv2 (system=2)	CPS2 (system=2)	CPS3 (system=3)	GEM-NEMO (system=1)	CanCM4i (system=2)	GEM5-NEMO (system=3)	CanESM5.1p1bc (system=4)	GEM5.2-NEMO (system=5)	ACCESS-S2  (system=2)
January									(c)	(c)	(c)	(c)	(c)	(c)	(c)	(c)																January
February																																February
March																																March
April																																April
May								*																								May
June																																June
July																																July
August																																August
September																																September
October																																October
November																																November
December																																December

^(a)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. More details here.
^(b) Due to technical reasons, a new version of ECMWF SEAS5 data has been created using the keyword system=51. See details on Announcements (date 12/October/2022)
^(c) Hindcast data for January 1993 is not available from MetOffice forecast systems (see "known issue" G4 on the data gaps section)

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