Please see the respective known issues table below for guidance and workarounds.
Amended data errors
Note: Data has been amended in the archive so all retrievals made after the completion of the recovery process (see table below) are not affected by the issues.
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Fixed issues number | Issue type | Wrong Data | Recovery period
(some data could still be wrong) | Recovery Finished
(all the data has been fixed) |
|---|
| E1. | WEB-API retrievals | - Monthly statistics of wind speed (param=207) from the MetOffice seasonal forecast system (origin=egrr):
- stream=msmm, type=em/hcmean/fcmean/fcmin/fcmax/fcstd
- stream=mmsa, type=em/fcmean
- Start dates: 2017-09-01, 2017-10-01 and 2017-11-01
| between 2017/11/24 at 11:00 GMT and 2017/11/28 at 12:00 GMT | after 2017/11/28 at 12:00 GMT | | E2. | CDS retrievals
(forms and API) & WebAPI retrievals | - Pressure variables data from GCFS2.0-v20171123 (DWD GCFS2.0) data
- Affects data from monthly and daily CDS catalogue entries for start date 2011-06-01 and member=13
- All variables (including 'single-level') have been substituted during the recovery process
| between 2019/03/12 at 11:30 GMT and 2019/03/12 at 12:05 GMT | after 2019/03/12 at 12:05 GMT | | E4.b | CDS retrievals
(forms and API) | Monthly statistics and anomalies data are temporarily not available for the following systems and dates:
NOTE that high-frequency data in the "daily" CDS catalogue entries are not affected UK MetOffice (system=14): November hindcasts (1993-2016) | between 2019/10/25 at 11:00 GMT and 2019/10/25 at 12:00 GMT | after 2019/10/25 at 12:00 GMT | | E3.a | CDS retrievals
(forms and API) & WebAPI retrievals | Snowfall amount from CMCC-CM2-v20160423 (CMCC SPSv3) data:
- Affects all data from monthly and daily CDS catalogue entries
- Start dates:
- all November start dates for hindcasts (1993-2016)
| between 2019/11/07 at 11:00 GMT and 2019/11/07 at 17:00 GMT | after 2019/11/07 at 17:00 GMT | | E3.b | CDS retrievals (forms and API) & WebAPI retrievals | Snowfall amount from CMCC-CM2-v20160423 (CMCC SPSv3) data:
- Affects all data from monthly and daily CDS catalogue entries
- Start dates:
- all December and January start dates for hindcasts (1993-2016)
| between 2019/11/25 at 11:00 GMT and 2019/11/25 at 14:00 GMT | after 2019/11/25 at 14:00 GMT | | E3.c | CDS retrievals (forms and API) & WebAPI retrievals | Snowfall amount from CMCC-CM2-v20160423 (CMCC SPSv3) data: - Affects all data from monthly and daily CDS catalogue entries
- Start dates:
- November 2018 real-time forecast.
- It also affects monthly anomalies CDS catalogue entry
| between 2019/11/27 at 17:00 GMT and 2019/11/27 at 18:00 GMT | after 2019/11/27 at 18:00 GMT | | E3.d | CDS retrievals (forms and API) & WebAPI retrievals | Snowfall amount from CMCC-CM2-v20160423 (CMCC SPSv3) data: - Affects monthly anomalies CDS catalogue entry
- Start dates: 2018-12-01, 2019-01-01
| between 2019/11/28 at 16:20 GMT and 2019/11/29 at 13:00 GMT | after 2019/11/29 at 13:00 GMT | | E4.a1 | CDS retrievals
(forms and API) | Monthly statistics and anomalies data are temporarily not available for the following systems and dates:
NOTE that high-frequency data in the "daily" CDS catalogue entries are not affected NCEP CFSv2: November hindcasts (1993-2016) |
| after 2019/12/13 at 12:00 GMT | | E4.a2 | CDS retrievals (forms and API) | Monthly statistics and anomalies data are temporarily not available for the following systems and dates:
NOTE that high-frequency data in the "daily" CDS catalogue entries are not affected NCEP CFSv2: October hindcasts (1993-2016) and real-time forecasts for October and November 2019 |
| after 2020/01/08 at 00:00 GMT | | E7. | CDS retrievals | Missing members from CFSv2-v20110310 (NCEP CFSv2) data. It affects all data available in the high-frequency (daily/subdaily) datasets: Members with start time at 06h,12h and 18h are not being retrieved from the archive by the CDS and just members with start time at 00h are returned | between 2020/05/15 at 15:45 GMT
and 2020/05/15 at 16:30 GMT | after 2020/05/15 at 16:30 GMT | | E7b. | CDS retrievals | Missing members from CFSv2-v20110310 (NCEP CFSv2) data. It affects all data available in the high-frequency (daily/subdaily) datasets: Members with start time at 06h,12h and 18h are not being retrieved from the archive by the CDS and just members with start time at 00h are returned. This issue affects retrievals done after the release of the October 2020 forecast, which happened at 12UTC on the 13th of October 2020. |
| after 2020/10/25 at 16:15 GMT |
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Not fixed data errors
| Warning |
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The issues described in the table below have not been fixed yet |
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| title | Not fixed issues table |
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Not fixed issues number | Issue type | Wrong Data | Recovery period
(some data could still be wrong) | Recovery Finished
(all the data has been fixed) |
|---|
| E5a. | CDS retrievals
(forms and API) | Pressure level variables from CMCC-CM2-v20160423 (CMCC SPSv3) data. It affects all hindcast data from the following start dates and ensemble members: March: 2013 (member 34)
April: 2013 (members 20 and 33)
May: 2013 (members 23, 29 and 32)
June: 2013 (member 26)
July: 1993 (members 11 and 12); 2013 (member 31)
August: 1994 (member 9); 2013 (members 21, 22, 25, 27 and 28)
September: 1998 (member 19) All variables (pressure levels and single level)from CMCC-CM2-v20160423 (CMCC SPSv3) data. It affects all hindcast data from the following start dates and ensemble members: March: 2013 (member 33)
July: 1996 (member 9) | archived (wrong) data won't be overwritten
CMCC system upgrade to SPSv3.5 is expected soon | archived (wrong) data won't be overwritten
CMCC system upgrade to SPSv3.5 is expected soon | | E5b. | CDS retrievals
(forms and API) | Real-time forecast data from CMCC-CM2-v20160423 (CMCC SPSv3) data. It affects anomalies calculated using the wrong data specified in E5.a, specifically: Pressure variables: March to September 2019
All variables: March 2019, July 2019
| archived (wrong) data won't be overwritten | archived (wrong) data won't be overwritten | | E6. | CDS retrievals
(forms and API) | Surface solar radiation variables from CFSv2-v20110310 (NCEP CFSv2) data. It affects: - forecast data for nominal start dates October, November, December 2019 and January, February 2020
- hindcast data (1993-2016) for nominal start dates October, November, December, January and February
Two variables - "surface net solar radiation" and "surface solar radiation downwards" - have been swapped with each other. This error affects the daily data and corresponding monthly statistics and anomalies. | data with a fix for the affected start dates will be provided
(date to be determined) | data with a fix for the affected start dates will be provided
(date to be determined) |
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| title | Data and metadata known issues table |
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| Known issue number | Centre | Forecasts
or
Hindcasts | Start dates(1) | Description |
|---|
| D1. | Met Office
(all systems) | Both | All | Near-surface temperatures (6-hourly and daily minimum and maximum) and dewpoint temperature are encoded as being calculated at a height of 2m.
Those parameters are calculated at 1.5 meters height in Met Office seasonal forecast systems | | D2. | Met Office
(system=12) | Both
| Hindcasts: May-Dec and January
Forecasts: Sep2017 to Jan2018 | Global grid is incomplete (just 180 latitude points, between 90S and 89N)
Requests with MARS-based interpolations (i.e. using "grid=NN/NN") won't work unless a suitable regional subselection is requested (with "area=LL/LL/LL/LL") Note that additionally, in this grid all points are set at integer values of latitude/longitude | D3. | All parameters on pressure levels are not globally complete, having "missing value indicators" in points below the orography. | | D4. | Météo-France
(system=5) | Forecasts | All | There is an issue with the postprocessing used at origin of the lagged start dates. Only members #27 to #51 are affected having data with a time shift of 7 days (168 hours). For instance, data with date/time labelled as YYYYMM08 00h would in fact correspond to YYYYMM01 00h. | | D5. | CMCC
(system=3) | Hindcasts | Years between 1993 and 1999 | There are anomalous values of SST (and associated parameters, e.g. fluxes, and vertical oceanic temperature profiles) appearing in the first hours of a very limited number of ensemble members of forecasts. The issue is caused by a bug in the oceanic perturbation generation tools used at origin to produce the ocean initial conditions. The errors/perturbations appear initially as excessively high SST values, confined to the reported hindcast years, in a limited number of grid points all in the tropical Pacific. They are very quickly dissipated by the coupled model physics and dynamics, affecting, therefore, only the first 24 hours of the forecasts at most. | | D6. | CMCC
(system=3) | Both | All | There are some variables affected by a spin-up issue. This affects just some ensemble members depending on the initial conditions each member started from. Unfortunately, as the selection of the forecast members is done randomly from a bigger pool of initial conditions, there is no metadata describing this in the current service based on GRIB files stored in ECMWF's MARS archive. | | D7. | DWD
(system=2) | Hindcasts | All 2017 start dates | For this forecasting system, year 2017 start dates have been computed as hindcasts and not real-time forecasts. | | D8. | CMCC
(system=3) | Both | All | For this forecasting system, the evaporation field is masked over the ocean (only land points are available) | | D9. | Met Office
(system=12,13) | Both | All | The fractional land-sea mask doesn't match the masked (land-only or sea-only) fields. For the files affected, the land-sea mask provided was produced as the result of a 1-degree interpolation of the binary land-sea mask in the native model resolution |
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Data gaps
Note: (1) See description of nominal start dates here
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| Known issue number | Centre | Forecasts
or
Hindcasts | Start dates(1) | Description |
|---|
| G1. | Met Office
(system=12) | Forecasts | 20180102
20180103
20180104
20180105 | No data is available. | | 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. | | 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. | | Hindcasts | Nominal start dates from February to April | MetOffice
(system=13) | Forecasts | Nominal start dates from May to December 2018 | | Hindcasts | Nominal start dates from May to December | | 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. |
|
| | 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 |
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| 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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