# \#cems **URL:** https://forum.ecmwf.int/tag/cems/91.md [Latest](https://forum.ecmwf.int/latest.md) · [Categories](https://forum.ecmwf.int/categories.md) · [Tags](https://forum.ecmwf.int/tags.md) --- ## [ECMWF APIs (FAQ, API + data documentation)](https://forum.ecmwf.int/t/ecmwf-apis-faq-api-data-documentation/6880)
**Author:** [@Koen\_Hufkens](https://forum.ecmwf.int/u/Koen_Hufkens)\ **Replies:** 8\ **Last updated:** [12 October 2026 12:01 UTC](https://forum.ecmwf.int/t/ecmwf-apis-faq-api-data-documentation/6880 "2026-10-12T12:01:46Z")
Below you find a centralized compilation of key documentation on the new ECMWF APIs as cross-posted from ECMWF API use | BlueGreen Labs. I will only use the CDS as a reference, but the same applies to ADS and EWDS. The … --- ## [ARCO Data Lake coming soon for the Data Stores Services!](https://forum.ecmwf.int/t/arco-data-lake-coming-soon-for-the-data-stores-services/14174)
**Author:** [@Anabelle](https://forum.ecmwf.int/u/Anabelle)\ **Replies:** 2\ **Last updated:** [8 July 2026 13:38 UTC](https://forum.ecmwf.int/t/arco-data-lake-coming-soon-for-the-data-stores-services/14174 "2026-07-08T13:38:43Z")
As part of its effort to continuously improve the quality of service offered to users, the Data Stores Services (DSS) at ECMWF is setting up an “ARCO Data Lake”. ARCO (Analysis-Ready Cloud-Optimised) data structures can … --- ## [GloFAS datapoint missing (except if Sub-region extraction)](https://forum.ecmwf.int/t/glofas-datapoint-missing-except-if-sub-region-extraction/14748)
**Author:** [@Joao\_M](https://forum.ecmwf.int/u/Joao_M)\ **Replies:** 3\ **Last updated:** [7 May 2026 10:22 UTC](https://forum.ecmwf.int/t/glofas-datapoint-missing-except-if-sub-region-extraction/14748 "2026-05-07T10:22:56Z")
Hi, we have noticed a point that went missing for Snow Depth from the global extraction for GloFAS: (lat, lon) = (45.925, 7.875) . After further investigation, using 2026-02-26 as a test, we noticed that if a small sq… --- ## [Cems-fire-seasonal appears to be delayed by a month](https://forum.ecmwf.int/t/cems-fire-seasonal-appears-to-be-delayed-by-a-month/14725)
**Author:** [@Tristan\_Jeffrey\_Meyers](https://forum.ecmwf.int/u/Tristan_Jeffrey_Meyers)\ **Replies:** 0\ **Last updated:** [15 February 2026 22:15 UTC](https://forum.ecmwf.int/t/cems-fire-seasonal-appears-to-be-delayed-by-a-month/14725 "2026-02-15T22:15:33Z")
I’ve been reviewing the documentation for the Seasonal Forecast of Fire Danger Indices from the Copernicus Emergency Management Service, but I haven’t been able to find an explanation for why the most recent data (update… --- ## [Dataset derived-fire-fuel-biomass not found](https://forum.ecmwf.int/t/dataset-derived-fire-fuel-biomass-not-found/11416)
**Author:** [@hongxuan\_su](https://forum.ecmwf.int/u/hongxuan_su)\ **Replies:** 11\ **Last updated:** [9 January 2026 17:17 UTC](https://forum.ecmwf.int/t/dataset-derived-fire-fuel-biomass-not-found/11416 "2026-01-09T17:17:54Z")
I get error “dataset derived-fire-fuel-biomass not found” while downloading with API provided, or failed process after submitted on website. Dataset URL is: Observation and ERA5-Land derived 9 km global daily fire fuel … --- ## [Software update for data extraction of a geographical area from EFAS gridded datasets](https://forum.ecmwf.int/t/software-update-for-data-extraction-of-a-geographical-area-from-efas-gridded-datasets/14446)
**Author:** [@Karen\_ORegan](https://forum.ecmwf.int/u/Karen_ORegan)\ **Replies:** 0\ **Last updated:** [27 November 2025 16:29 UTC](https://forum.ecmwf.int/t/software-update-for-data-extraction-of-a-geographical-area-from-efas-gridded-datasets/14446 "2025-11-27T16:29:00Z")
On 03 December 2025, the software handling area extraction for gridded datasets will be updated to a new version. The new version fixes an issue that caused an interpolation of the data during the area extraction - assig… --- ## [New cdsapi version 0.7.7 released and new API package for advanced users ready to be used](https://forum.ecmwf.int/t/new-cdsapi-version-0-7-7-released-and-new-api-package-for-advanced-users-ready-to-be-used/12806)
**Author:** [@Anabelle](https://forum.ecmwf.int/u/Anabelle)\ **Replies:** 1\ **Last updated:** [1 October 2025 16:06 UTC](https://forum.ecmwf.int/t/new-cdsapi-version-0-7-7-released-and-new-api-package-for-advanced-users-ready-to-be-used/12806 "2025-10-01T16:06:19Z")
As part of improving Data Stores users experience, a new version of the default cdsapi package on Data Stores was released yesterday, 30 September 2025: version 0.7.7. All cdsapi users are strongly recommended to upgrad… --- ## [Scheduled maintenance of the Cloud infrastructure on 22 September 2025](https://forum.ecmwf.int/t/scheduled-maintenance-of-the-cloud-infrastructure-on-22-september-2025/14173)
**Author:** [@Michela](https://forum.ecmwf.int/u/Michela)\ **Replies:** 1\ **Last updated:** [18 September 2025 13:46 UTC](https://forum.ecmwf.int/t/scheduled-maintenance-of-the-cloud-infrastructure-on-22-september-2025/14173 "2025-09-18T13:46:31Z")
A scheduled essential maintenance of the Cloud infrastructure is planned on Monday 22nd September 2025, from 11 UTC for a maximum time of 2 hours (time window subject to change). During this period, access to the follow… --- ## [CC-BY licence to replace Licence to use Copernicus Products on 02 July 2025](https://forum.ecmwf.int/t/cc-by-licence-to-replace-licence-to-use-copernicus-products-on-02-july-2025/13464)
**Author:** [@Anabelle](https://forum.ecmwf.int/u/Anabelle)\ **Replies:** 7\ **Last updated:** [17 July 2025 09:43 UTC](https://forum.ecmwf.int/t/cc-by-licence-to-replace-licence-to-use-copernicus-products-on-02-july-2025/13464 "2025-07-17T09:43:03Z")
Please be informed that on Wednesday 2nd July 2025, the License to use Copernicus Products in the Climate Data Store (CDS), Atmosphere Data Store (ADS) and the CEMS Early Warning Data Store (EWDS) will be replaced with t… --- ## [Weird soil depths in EFAS version 5 data](https://forum.ecmwf.int/t/weird-soil-depths-in-efas-version-5-data/13754)
**Author:** [@Karan\_Mahajan](https://forum.ecmwf.int/u/Karan_Mahajan)\ **Replies:** 1\ **Last updated:** [10 July 2025 12:05 UTC](https://forum.ecmwf.int/t/weird-soil-depths-in-efas-version-5-data/13754 "2025-07-10T12:05:53Z")
Hello. I am trying to download the soil moisture content data from the EFAS hydrological reanalysis version 5 product: (River discharge and related historical data from the European Flood Awareness System) This product… --- ## [Scheduled maintenance of the Cloud infrastructure on 30 June 2025](https://forum.ecmwf.int/t/scheduled-maintenance-of-the-cloud-infrastructure-on-30-june-2025/13598)
**Author:** [@Michela](https://forum.ecmwf.int/u/Michela)\ **Replies:** 0\ **Last updated:** [24 June 2025 11:00 UTC](https://forum.ecmwf.int/t/scheduled-maintenance-of-the-cloud-infrastructure-on-30-june-2025/13598 "2025-06-24T11:00:18Z")
A scheduled essential maintenance of the Cloud infrastructure is planned on Monday 30th June 2025, from 10:30 UTC for a maximum time of 2 hours (time window subject to change). During this period, access to the followin… --- ## [New Beta service: JupyterHub to access and process data within the Data Stores Common Cloud Infrastructure (CCI)](https://forum.ecmwf.int/t/new-beta-service-jupyterhub-to-access-and-process-data-within-the-data-stores-common-cloud-infrastructure-cci/13487)
**Author:** [@Anabelle](https://forum.ecmwf.int/u/Anabelle)\ **Replies:** 0\ **Last updated:** [16 June 2025 14:19 UTC](https://forum.ecmwf.int/t/new-beta-service-jupyterhub-to-access-and-process-data-within-the-data-stores-common-cloud-infrastructure-cci/13487 "2025-06-16T14:19:46Z")
We are delighted to announce, today, Monday 16 June 2025, the opening of the following new Data Stores service: JupyterHub Service (Beta) within the Data Stores Common Cloud Infrastructure (CCI) The JupyterHub allows u… --- ## [Scheduled maintenance of the Data Stores Cloud Infrastructure - 19 May 2025](https://forum.ecmwf.int/t/scheduled-maintenance-of-the-data-stores-cloud-infrastructure-19-may-2025/13056)
**Author:** [@Anabelle](https://forum.ecmwf.int/u/Anabelle)\ **Replies:** 1\ **Last updated:** [19 May 2025 16:53 UTC](https://forum.ecmwf.int/t/scheduled-maintenance-of-the-data-stores-cloud-infrastructure-19-may-2025/13056 "2025-05-19T16:53:35Z")
A scheduled essential maintenance of the Data Stores Cloud infrastructure is planned on Monday 19th May 2025, 10:30-15:30 UTC (time window subject to change). During this period, the following services will be impacted: … --- ## [Ability to select area for download](https://forum.ecmwf.int/t/ability-to-select-area-for-download/12886)
**Author:** [@Kamil\_Gazizullin](https://forum.ecmwf.int/u/Kamil_Gazizullin)\ **Replies:** 0\ **Last updated:** [6 May 2025 13:32 UTC](https://forum.ecmwf.int/t/ability-to-select-area-for-download/12886 "2025-05-06T13:32:30Z")
Hello everyone! I want to download this Fire danger indices historical. but I don’t need all the data (as far as I understand it has data for the whole earth). Is it possible to programmatically select the area (coord… --- ## [Data Stores in degraded status](https://forum.ecmwf.int/t/data-stores-in-degraded-status/12472)
**Author:** [@Anabelle](https://forum.ecmwf.int/u/Anabelle)\ **Replies:** 1\ **Last updated:** [7 April 2025 16:09 UTC](https://forum.ecmwf.int/t/data-stores-in-degraded-status/12472 "2025-04-07T16:09:15Z")
As indicated on the ECMWF Service Status page, Data Stores are currently in degraded status while an ongoing technical issue on the Data Stores infrastructure is being investigated. This is affecting all data retrieval… --- ## ["dataset cems-fire-historical-v1 not found" error message](https://forum.ecmwf.int/t/dataset-cems-fire-historical-v1-not-found-error-message/11916)
**Author:** [@Brittany\_Engle](https://forum.ecmwf.int/u/Brittany_Engle)\ **Replies:** 2\ **Last updated:** [17 March 2025 11:42 UTC](https://forum.ecmwf.int/t/dataset-cems-fire-historical-v1-not-found-error-message/11916 "2025-03-17T11:42:02Z")
I am trying to download data from the “Fire danger indices historical data from the Copernicus Emergency Management Service” dataset. I have my own version of the API request that keeps generating an “dataset cems-fire-h… --- ## [CDS, ADS and EWDS down until further notice](https://forum.ecmwf.int/t/cds-ads-and-ewds-down-until-further-notice/8015)
**Author:** [@Anabelle](https://forum.ecmwf.int/u/Anabelle)\ **Replies:** 43\ **Last updated:** [21 February 2025 14:23 UTC](https://forum.ecmwf.int/t/cds-ads-and-ewds-down-until-further-notice/8015 "2025-02-21T14:23:37Z")
We are very sorry to inform our users that due to some severe technical issues at the infrastructure level, the Data Stores (CDS, ADS and EWDS) and all associated services (e.g. dataset catalogues, API) are closed to use… --- ## [Creating CDSAPI Code for LISFLOOD Data](https://forum.ecmwf.int/t/creating-cdsapi-code-for-lisflood-data/11425)
**Author:** [@Emre\_Salkim](https://forum.ecmwf.int/u/Emre_Salkim)\ **Replies:** 2\ **Last updated:** [17 February 2025 17:26 UTC](https://forum.ecmwf.int/t/creating-cdsapi-code-for-lisflood-data/11425 "2025-02-17T17:26:56Z")
Dear all, I am trying to create CDSAPI Code for LISFLOOD Data on this link. When I complete my selections and the automated API Request code is generated, it gives an error in Python as written here: “RuntimeError: 404 … --- ## [Network outage on 12-Feb-2025](https://forum.ecmwf.int/t/network-outage-on-12-feb-2025/11336)
**Author:** [@Anabelle](https://forum.ecmwf.int/u/Anabelle)\ **Replies:** 0\ **Last updated:** [12 February 2025 21:42 UTC](https://forum.ecmwf.int/t/network-outage-on-12-feb-2025/11336 "2025-02-12T21:42:53Z")
A severe network outage, lasting several hours in the afternoon of Wednesday 12 February 2025, affected access to all ECMWF services including our Data Stores (CDS, ADS, EWDS), Knowledge Base, Forum, etc. As indicated o… --- ## [🚀 New Dataset Published on vegetation characteristics](https://forum.ecmwf.int/t/new-dataset-published-on-vegetation-characteristics/11288)
**Author:** [@Francesca\_Di\_Giuseppe](https://forum.ecmwf.int/u/Francesca_Di_Giuseppe)\ **Replies:** 0\ **Last updated:** [11 February 2025 12:09 UTC](https://forum.ecmwf.int/t/new-dataset-published-on-vegetation-characteristics/11288 "2025-02-11T12:09:03Z")
Explore the newly released\*\* Fire Fuel Characteristics dataset This dataset can be used to link vegetation changes to fire danger. It also helps in understanding the drivers of fire activity, shifts in vegetation char… --- ## [GloFAS v4.1 - New variables made available on Climate Data Store](https://forum.ecmwf.int/t/glofas-v4-1-new-variables-made-available-on-climate-data-store/2200)
**Author:** [@Karen\_ORegan](https://forum.ecmwf.int/u/Karen_ORegan)\ **Replies:** 1\ **Last updated:** [16 December 2024 14:45 UTC](https://forum.ecmwf.int/t/glofas-v4-1-new-variables-made-available-on-climate-data-store/2200 "2024-12-16T14:45:42Z")
We are pleased to inform you that the new forecast variables released as part of the update for GloFAS v4.1 are now available from the Climate Data Store (CDS). For more information, see the dedicated wiki page for detai… --- ## [RESOLVED: Issue with European Flood Awareness System (EFAS) version 5 data on CDS - error in the initial conditions](https://forum.ecmwf.int/t/resolved-issue-with-european-flood-awareness-system-efas-version-5-data-on-cds-error-in-the-initial-conditions/2659)
**Author:** [@Karen\_ORegan](https://forum.ecmwf.int/u/Karen_ORegan)\ **Replies:** 0\ **Last updated:** [3 May 2024 12:51 UTC](https://forum.ecmwf.int/t/resolved-issue-with-european-flood-awareness-system-efas-version-5-data-on-cds-error-in-the-initial-conditions/2659 "2024-05-03T12:51:26Z")
The error in the computation of the initial conditions of EFAS version 5 forecasts has been resolved. Regular EFAS operations resumed with forecast date 29 May 2024 at 12UTC. Detailed information on EFAS operational rel… --- ## [Pre-operational GloFAS v3.1 data available from the Climate Data Store](https://forum.ecmwf.int/t/pre-operational-glofas-v3-1-data-available-from-the-climate-data-store/926)
**Author:** [@Karen\_ORegan](https://forum.ecmwf.int/u/Karen_ORegan)\ **Replies:** 0\ **Last updated:** [15 April 2021 11:25 UTC](https://forum.ecmwf.int/t/pre-operational-glofas-v3-1-data-available-from-the-climate-data-store/926 "2021-04-15T11:25:29Z")
We are pleased to inform you that pre-operational GloFAS v3.1 data is now available from the Climate Data Store (CDS), ahead of the official cycle launch scheduled for late May. The datasets are accessible from the Cope… --- ## [Global Flood Awareness System Data](https://forum.ecmwf.int/t/global-flood-awareness-system-data/1133)
**Author:** [@Christopher\_Barnard](https://forum.ecmwf.int/u/Christopher_Barnard)\ **Replies:** 0\ **Last updated:** [6 November 2019 11:22 UTC](https://forum.ecmwf.int/t/global-flood-awareness-system-data/1133 "2019-11-06T11:22:54Z")
Global Flood Awareness System (GloFAS) historical data and documentation is now being provided by the CDS. The aim of GloFAS is to support preparatory measures before major flood events strike, particularly in the larg… --- ## [European Flood Awareness System data](https://forum.ecmwf.int/t/european-flood-awareness-system-data/1008)
**Author:** [@Michela](https://forum.ecmwf.int/u/Michela)\ **Replies:** 0\ **Last updated:** [10 May 2019 08:33 UTC](https://forum.ecmwf.int/t/european-flood-awareness-system-data/1008 "2019-05-10T08:33:40Z")
European Flood Awareness System (EFAS) historical and forecast data and documentaion is now being provided by the CDS. The aim of EFAS is to support preparatory measures before major flood events strike, particularly i…