# Scheduled maintenance of the Data Stores Cloud Infrastructure - 19 May 2025 **URL:** \ **Category:** Announcements\ **Tags:** cams, cds, c3s, ewds, cems, ads\ **Created:** [14 May 2025 10:36 UTC](https://forum.ecmwf.int/t/scheduled-maintenance-of-the-data-stores-cloud-infrastructure-19-may-2025/13056 "2025-05-14T10:36:16Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Anabelle](https://forum.ecmwf.int/user_avatar/forum.ecmwf.int/anabelle/32/360_2.png) [@Anabelle](https://forum.ecmwf.int/u/Anabelle)\ **Post date:** [14 May 2025 10:36 UTC](https://forum.ecmwf.int/t/scheduled-maintenance-of-the-data-stores-cloud-infrastructure-19-may-2025/13056/1 "2025-05-14T10:36:16Z")
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: - Climate Data Store ([CDS](https://cds.climate.copernicus.eu/)) , Atmosphere Data Store ([ADS](https://ads.atmosphere.copernicus.eu/)) and CEMS Early Warning Data Store ([EWDS](https://ewds.climate.copernicus.eu/)): No access, whether through the web interface or using the API service. - [CAMS](https://atmosphere.copernicus.eu/) and [C3S](https://climate.copernicus.eu/) websites: No access - [ECMWF Forum](https://forum.ecmwf.int/): access at risk. We advise users to monitor our [ECMWF Service Status page](https://status.ecmwf.int/) to check the Data Stores status and other ECMWF services. Access to the affected services will be restored as soon as the maintenance session will have successfully completed. Should the timing of the session be changed, we will post an update in this topic. We apologise for the inconvenience this may cause. ECMWF Support ---
**Author:** ![Anabelle](https://forum.ecmwf.int/user_avatar/forum.ecmwf.int/anabelle/32/360_2.png) [@Anabelle](https://forum.ecmwf.int/u/Anabelle)\ **Post date:** [15 May 2025 08:48 UTC](https://forum.ecmwf.int/t/scheduled-maintenance-of-the-data-stores-cloud-infrastructure-19-may-2025/13056/2 "2025-05-15T08:48:37Z")
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**Author:** ![Anabelle](https://forum.ecmwf.int/user_avatar/forum.ecmwf.int/anabelle/32/360_2.png) [@Anabelle](https://forum.ecmwf.int/u/Anabelle)\ **Post date:** [19 May 2025 16:50 UTC](https://forum.ecmwf.int/t/scheduled-maintenance-of-the-data-stores-cloud-infrastructure-19-may-2025/13056/3 "2025-05-19T16:50:55Z")
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**Author:** ![Anabelle](https://forum.ecmwf.int/user_avatar/forum.ecmwf.int/anabelle/32/360_2.png) [@Anabelle](https://forum.ecmwf.int/u/Anabelle)\ **Post date:** [19 May 2025 16:53 UTC](https://forum.ecmwf.int/t/scheduled-maintenance-of-the-data-stores-cloud-infrastructure-19-may-2025/13056/4 "2025-05-19T16:53:35Z")
The maintenance session completed successfully earlier today and access to all affected services has been restored. ECMWF Support