| Known issue number | Centre | Forecasts
or
Hindcasts | Start dates(1) | Description |
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|---|
| G1. | Met Office
(system=12) | Forecasts | 20180102
20180103
20180104
20180105 | No data is available. |
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| G2. | Met Office
(system=12,13) | Forecasts | Nominal start dates previous to November 2018 | Monthly statistics and anomalies are just available for 50 members - specifically, the 50 members closest and previous or equal to the 1st of the nominal start month. |
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| G3. | MetOffice
(system=12)
| Forecasts | Nominal start dates from February to April 2018 | Parameter "Soil temperature at level 1" (GRIB/MARS paramId=139) is not available. |
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| Hindcasts | Nominal start dates from February to April |
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MetOffice
(system=13) | Forecasts | Nominal start dates from May to December 2018 |
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| Hindcasts | Nominal start dates from May to December |
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| G4. | MetOffice
(all systems) | Hindcasts | Nominal start date January 1993 | January 1993 data is not available.
MetOffice system produces hindcasts from January 1993 to December 2016, and due to the way nominal start dates are assigned, January 1993 would require data from December 1992 which are not produced by the MetOffice system. |
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| G5. | MetOffice
(system=600) | Forecasts | 20210222
20210223 | No data is available.
An issue with assimilation of sea-ice data was reported by the MetOffice affecting forecasts initialised on 22 and 23 February 2021. Due to the potential impact of that wrong sea-ice initialisation throughout the forecast, those start dates haven't been processed by C3S. | Expand |
|---|
| The GloSea6 forecasts initialised on 22 and 23 February were initialised with low Arctic sea ice extents. This resulted from corrupt data used in the derivation of ocean initial conditions. The sea ice largely recovers in these forecasts, but is biased low through the whole 6-month forecast compared to neighbouring days.
Initial sea-ice conditions for different GloSea6 February 2021 start dates:
Evolution of sea-ice fraction forecasts for different GloSea6 February 2021 start dates: 
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| G6. | JMA
(system=3) | Forecasts | 20220102 to
20220111 | No data is available.
JMA CPS3 started its operational production at JMA on the 12th January 2022 |
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| G7. | MetOffice
(system=601) | Hindcasts | 20030417 | Due to a technical issue with the acquisition at ECMWF of MetOffice data, member 106 was incomplete. To fix this in the archive the data from one member from system 600 (same forecasting system) for this start date was used to substitute member 106 |
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| G8. | NCEP
(system=2) | Forecasts | 20230522 | No data is available.
Due to a technical issue with the acquisition at ECMWF of NCEP data, all 4 members initialised on 22/May/2023 (00, 06, 12 and 18h) were not correctly transmitted. |
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| G9. | MetOffice (system=602) | Forecasts | 20230715 | Member 002 is missing. It will not be replaced. |
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| G10. | MetOffice (system=602)
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| Due to a technical issue with the acquisition at ECMWF of MetOffice GloSea6 data, some data files have been lost and are not recoverable. This only affects the ocean monthly data, for everything else in the atmospheric datasets (daily, monthly and anomalies) and downstream products the affected members are available. |
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| Forecasts | 20230808 | Ocean (monthly) data files are missing for both member 001 and 002. |
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| Hindcasts | November
nominal start date | Ocean (monthly) data files are missing for a set of 66 ensemble members (see below) | Expand |
|---|
| title | list of missing ensemble members |
|---|
|
| 1101 | 1025 | | 1993 | 203 | 205 | | 1994 | 202, 205 |
| | 1995 | 202 | 205, 206 | | 1996 | 202, 205 | 206 | | 1997 | 202, 204, 205 |
| | 1998 | 202, 203, 205 | 206 | | 1999 | 202, 205 | 204, 205 | | 2000 | 202 | 204 | | 2001 | 202 | 204 | | 2002 | 202 |
| | 2003 | 202 |
| | 2004 | 202 |
| | 2005 | 202 | 204, 205 | | 2006 | 202, 205 | 204, 205 | | 2007 | 202, 205 | 204, 205 | | 2008 | 202, 204, 205 | 202, 204, 205 | | 2009 | 202 | 204, 205 | | 2010 | 202, 205 | 204 | | 2011 | 202, 205 | 205 | | 2012 | 202, 205 | 204 | | 2013 | 202, 205 | 204, 205 | | 2014 | 202 | 205 | | 2015 | 202 | 205 | | 2016 | 202 |
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December
nominal start date | Ocean (monthly) data files are missing for a set of 3 ensemble members (see below) | Expand |
|---|
| title | list of missing ensemble members |
|---|
| 20071201: member 207
20081201: member 207
20151125: member 205 |
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January
nominal start date | Ocean (monthly) data files are missing for a set of 3 ensemble members (see below) | Expand |
|---|
| title | list of missing ensemble members |
|---|
| 20081217: member 203
19991209: member 202
20001209: member 203 |
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| G11. | MetOffice (system=603) | Forecasts | 20241118 | Due to a technical issue with the production of MetOffice GloSea6 data files for C3S contribution, some ocean2D monthly data files haven't been succesfully produced for realization 002 and therefore all ocean2D monthly data files for this member have not been published on the CDS seasonal-monthly-ocean dataset. The affected ensemble member corresponds to number "27" of the December 2024 nominal start date real-time forecasts. Please note that data from this member in all other CDS datasets haven't been affected by this issue and they are available as usual. |
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