# Latest **URL:** https://forum.ecmwf.int/latest.md [Latest](https://forum.ecmwf.int/latest.md) · [Categories](https://forum.ecmwf.int/categories.md) · [Tags](https://forum.ecmwf.int/tags.md) --- ## [Best strategy to retrieve two years of model-level data (403 Client Error)](https://forum.ecmwf.int/t/best-strategy-to-retrieve-two-years-of-model-level-data-403-client-error/15370)
**Author:** [@Lorenzo\_Luca\_Donati](https://forum.ecmwf.int/u/Lorenzo_Luca_Donati)\ **Replies:** 0\ **Last updated:** [30 September 2026 14:24 UTC](https://forum.ecmwf.int/t/best-strategy-to-retrieve-two-years-of-model-level-data-403-client-error/15370 "2026-09-30T14:24:31Z")
Hi all, I am currently trying to retrieve two years of model level data from a series of locations. Up until a month ago everything worked seamlessly for another set of locations, while now I get an error if I try to ru… --- ## [Most recent ERA5T data now also available through ECMWF Dissemination](https://forum.ecmwf.int/t/most-recent-era5t-data-now-also-available-through-ecmwf-dissemination/15287)
**Author:** [@Michela](https://forum.ecmwf.int/u/Michela)\ **Replies:** 1\ **Last updated:** [30 September 2026 13:52 UTC](https://forum.ecmwf.int/t/most-recent-era5t-data-now-also-available-through-ecmwf-dissemination/15287 "2026-09-30T13:52:56Z")
We are pleased to announce that the most recent ERA5T data (with 5 days delay from the current date) are also available through ECMWF Dissemination from 8 September 2026 for a service charge. In this way, you can select… --- ## [Coming soon: the ECMWF Data Desk](https://forum.ecmwf.int/t/coming-soon-the-ecmwf-data-desk/15368)
**Author:** [@Michela](https://forum.ecmwf.int/u/Michela)\ **Replies:** 0\ **Last updated:** [30 September 2026 13:50 UTC](https://forum.ecmwf.int/t/coming-soon-the-ecmwf-data-desk/15368 "2026-09-30T13:50:51Z")
At the moment, managing your data with us is spread across several places. You use the Product Requirements Catalogue to configure and order data. You access the Product Requirements Editor (PREd) to manage your destinat… --- ## [ECMWF Free and open data at 9 km soon to come](https://forum.ecmwf.int/t/ecmwf-free-and-open-data-at-9-km-soon-to-come/15366)
**Author:** [@Michela](https://forum.ecmwf.int/u/Michela)\ **Replies:** 0\ **Last updated:** [30 September 2026 13:49 UTC](https://forum.ecmwf.int/t/ecmwf-free-and-open-data-at-9-km-soon-to-come/15366 "2026-09-30T13:49:51Z")
ECMWF’s free and open real-time data is moving to 0.1° (approximately 9 km), the highest model resolution, delivering on the commitment agreed by Council. We expect this to go live by the end of October 2026. What this … --- ## [CAMS greenhouse gas forecasts: approved, and coming next](https://forum.ecmwf.int/t/cams-greenhouse-gas-forecasts-approved-and-coming-next/15365)
**Author:** [@Michela](https://forum.ecmwf.int/u/Michela)\ **Replies:** 0\ **Last updated:** [30 September 2026 13:49 UTC](https://forum.ecmwf.int/t/cams-greenhouse-gas-forecasts-approved-and-coming-next/15365 "2026-09-30T13:49:50Z")
We are pleased to announce that the decision to add the CAMS global greenhouse gas forecast (IFS-GHG, class=gg) to the ECMWF catalogue and to dissemination has now been approved, and we are working through the schedule a… --- ## [End of LEGACY filenaming](https://forum.ecmwf.int/t/end-of-legacy-filenaming/15030)
**Author:** [@Michela](https://forum.ecmwf.int/u/Michela)\ **Replies:** 2\ **Last updated:** [30 September 2026 13:47 UTC](https://forum.ecmwf.int/t/end-of-legacy-filenaming/15030 "2026-09-30T13:47:53Z")
With the implementation of IFS Cycle 50r2 (currently scheduled for Q1 2027), use of the LEGACY filenaming convention for IFS real-time products delivery via the ECMWF Production Data Store (ECPDS) will be discontinued. … --- ## [Downloading ERA5-Land data via cdsapi takes a long time in the queue](https://forum.ecmwf.int/t/downloading-era5-land-data-via-cdsapi-takes-a-long-time-in-the-queue/15348)
**Author:** [@wanjia\_sun](https://forum.ecmwf.int/u/wanjia_sun)\ **Replies:** 3\ **Last updated:** [30 September 2026 12:22 UTC](https://forum.ecmwf.int/t/downloading-era5-land-data-via-cdsapi-takes-a-long-time-in-the-queue/15348 "2026-09-30T12:22:00Z")
This is my first time using cdsapi to download global daily 2 m temperature data from the “ERA5-Land post-processed daily statistics from 1950 to present” dataset. I submit requests one month at a time, with three reques… --- ## [403 Client Error while downloading 1 day of Europe constrained ERA5 data](https://forum.ecmwf.int/t/403-client-error-while-downloading-1-day-of-europe-constrained-era5-data/15337)
**Author:** [@Sofia\_Gomez\_Maqueo\_Anaya](https://forum.ecmwf.int/u/Sofia_Gomez_Maqueo_Anaya)\ **Replies:** 8\ **Last updated:** [30 September 2026 12:20 UTC](https://forum.ecmwf.int/t/403-client-error-while-downloading-1-day-of-europe-constrained-era5-data/15337 "2026-09-30T12:20:33Z")
Hi all, I am trying to download ERA5 data using api as a public user. I had downloaded the same dataset before a few times now and I had not encountered this error until now. The downloading of the data is done through… --- ## [Migration of ECMWF forecast data to GRIB2 format: Static sample dataset available in MARS archive](https://forum.ecmwf.int/t/migration-of-ecmwf-forecast-data-to-grib2-format-static-sample-dataset-available-in-mars-archive/15328)
**Author:** [@Michela](https://forum.ecmwf.int/u/Michela)\ **Replies:** 4\ **Last updated:** [30 September 2026 11:56 UTC](https://forum.ecmwf.int/t/migration-of-ecmwf-forecast-data-to-grib2-format-static-sample-dataset-available-in-mars-archive/15328 "2026-09-30T11:56:13Z")
We are happy to announce that the first test dataset in full GRIB2 format is now available in MARS archive. The dataset is provided so that you can start updating and testing your MARS retrieval requests and post-proces… --- ## [The CAMS Atmosphere Watch 2026 report is out!](https://forum.ecmwf.int/t/the-cams-atmosphere-watch-2026-report-is-out/15369)
**Author:** [@Anabelle](https://forum.ecmwf.int/u/Anabelle)\ **Replies:** 0\ **Last updated:** [30 September 2026 11:53 UTC](https://forum.ecmwf.int/t/the-cams-atmosphere-watch-2026-report-is-out/15369 "2026-09-30T11:53:22Z")
We are delighted to announce the publication today, 30 September 2026, of the CAMS Atmosphere Watch 2026 Report. CAMS Atmosphere Watch 2026 report, compiled by the Copernicus Atmosphere Monitoring Service (CAMS) at EC… --- ## [Cordex-EUR11 data has band patterns in data values](https://forum.ecmwf.int/t/cordex-eur11-data-has-band-patterns-in-data-values/15363)
**Author:** [@Merijn\_van\_den\_Bosch](https://forum.ecmwf.int/u/Merijn_van_den_Bosch)\ **Replies:** 0\ **Last updated:** [29 September 2026 15:39 UTC](https://forum.ecmwf.int/t/cordex-eur11-data-has-band-patterns-in-data-values/15363 "2026-09-29T15:39:41Z")
Hello, I am currently working with both temperature and SPEI data from Cordex-EUR11. All is working well, but I’ve noticed some kind of unnatural splits in the data values which form longitudinal lines in the Eastern p… --- ## [Data licensing change for some OpenIFS Data Hub products](https://forum.ecmwf.int/t/data-licensing-change-for-some-openifs-data-hub-products/13468)
**Author:** [@Marcus\_Koehler](https://forum.ecmwf.int/u/Marcus_Koehler)\ **Replies:** 4\ **Last updated:** [28 September 2026 09:03 UTC](https://forum.ecmwf.int/t/data-licensing-change-for-some-openifs-data-hub-products/13468 "2026-09-28T09:03:34Z")
Hi Data Hub users, The OpenIFS Data Hub makes use of Copernicus data products for some of the data it generates (e.g. experiment data based on ERA5 reanalyses). We would like to notify our users about a forthcoming cha… --- ## [Is there an archived surface upward longwave radiation field in ERA5, or should it be derived as STRD − STR? ](https://forum.ecmwf.int/t/is-there-an-archived-surface-upward-longwave-radiation-field-in-era5-or-should-it-be-derived-as-strd-str/15360)
**Author:** [@Cristiam\_Portilla](https://forum.ecmwf.int/u/Cristiam_Portilla)\ **Replies:** 0\ **Last updated:** [28 September 2026 08:25 UTC](https://forum.ecmwf.int/t/is-there-an-archived-surface-upward-longwave-radiation-field-in-era5-or-should-it-be-derived-as-strd-str/15360 "2026-09-28T08:25:33Z")
Our team is working on the Fondecyt Regular Project N° 1260452 (focused on projecting marine heatwaves and cold spells off the coast of Chile). Context of the problem: We are comparing the agreement between net shortwa… --- ## [Recommended strategy for bulk downloads](https://forum.ecmwf.int/t/recommended-strategy-for-bulk-downloads/14888)
**Author:** [@David\_Orme](https://forum.ecmwf.int/u/David_Orme)\ **Replies:** 9\ **Last updated:** [26 September 2026 15:49 UTC](https://forum.ecmwf.int/t/recommended-strategy-for-bulk-downloads/14888 "2026-09-26T15:49:02Z")
Hi, I wanted to ask if there is a preferred or recommended approach for downloading bulk data. I’ve been tasked to download 46 years of hourly data for 10 variables from the global ERA5 single level 0.25° resolution dat… --- ## [ERA5-Land GRIB1 accumulated fields: P1/P2 metadata inconsistent with documented forecast accumulation?](https://forum.ecmwf.int/t/era5-land-grib1-accumulated-fields-p1-p2-metadata-inconsistent-with-documented-forecast-accumulation/15354)
**Author:** [@Lyubomir\_Durankev](https://forum.ecmwf.int/u/Lyubomir_Durankev)\ **Replies:** 0\ **Last updated:** [23 September 2026 17:44 UTC](https://forum.ecmwf.int/t/era5-land-grib1-accumulated-fields-p1-p2-metadata-inconsistent-with-documented-forecast-accumulation/15354 "2026-09-23T17:44:35Z")
Hello, I am trying to verify the correct hourly interpretation of surface\_net\_thermal\_radiation (STR, ECMWF parameter 177) downloaded from the CDS reanalysis-era5-land gridded dataset in GRIB format. I am aware of th… --- ## [Short video guide on How to use CDS API released!](https://forum.ecmwf.int/t/short-video-guide-on-how-to-use-cds-api-released/15353)
**Author:** [@Anabelle](https://forum.ecmwf.int/u/Anabelle)\ **Replies:** 0\ **Last updated:** [23 September 2026 16:31 UTC](https://forum.ecmwf.int/t/short-video-guide-on-how-to-use-cds-api-released/15353 "2026-09-23T16:31:31Z")
As part of our ongoing efforts to continuously improve support to our users, we are pleased to announce the release today, 24 September 2026, of a new short video guide on using the Climate Data Store (CDS) API. The vide… --- ## [How to correctly read ECMWF BUFR data for the entire life cycle of a specific tropical cyclone?](https://forum.ecmwf.int/t/how-to-correctly-read-ecmwf-bufr-data-for-the-entire-life-cycle-of-a-specific-tropical-cyclone/15349)
**Author:** [@zhuo\_li](https://forum.ecmwf.int/u/zhuo_li)\ **Replies:** 0\ **Last updated:** [23 September 2026 09:07 UTC](https://forum.ecmwf.int/t/how-to-correctly-read-ecmwf-bufr-data-for-the-entire-life-cycle-of-a-specific-tropical-cyclone/15349 "2026-09-23T09:07:16Z")
Recently, when parsing ECMWF BUFR tracking data, I noticed that under the same initialization time (run time), there are multiple cyclone names/identifiers listed, such as 30W, 71W, 72W, etc., with very similar latitude … --- ## [Adm1 mapping table, Global climate and energy indicators from 1950 to present derived from reanalysis](https://forum.ecmwf.int/t/adm1-mapping-table-global-climate-and-energy-indicators-from-1950-to-present-derived-from-reanalysis/15092)
**Author:** [@Freddy\_Martin](https://forum.ecmwf.int/u/Freddy_Martin)\ **Replies:** 2\ **Last updated:** [23 September 2026 06:55 UTC](https://forum.ecmwf.int/t/adm1-mapping-table-global-climate-and-energy-indicators-from-1950-to-present-derived-from-reanalysis/15092 "2026-09-23T06:55:59Z")
Hello, I would really appreciate if someone could help me map the adm1 names to actual regions. When using the following data source: “Global climate and energy indicators from 1950 to present derived from reanalysis” r… --- ## [Information about SEAS6](https://forum.ecmwf.int/t/information-about-seas6/15342)
**Author:** [@Lonneke\_van\_Bijsterveldt](https://forum.ecmwf.int/u/Lonneke_van_Bijsterveldt)\ **Replies:** 0\ **Last updated:** [22 September 2026 13:47 UTC](https://forum.ecmwf.int/t/information-about-seas6/15342 "2026-09-22T13:47:06Z")
Hello, I am trying to find information about SEAS6. I currently use SEAS5 from both MARS and CDS. The only information I have managed to find online is this presentation from 2023: https://climate.copernicus.eu/sites/d… --- ## [New dataset published in CDS: CERRA-Land time-series sub-daily regional reanalysis data for Europe from 1984 to present](https://forum.ecmwf.int/t/new-dataset-published-in-cds-cerra-land-time-series-sub-daily-regional-reanalysis-data-for-europe-from-1984-to-present/15321)
**Author:** [@Michela](https://forum.ecmwf.int/u/Michela)\ **Replies:** 0\ **Last updated:** [22 September 2026 11:15 UTC](https://forum.ecmwf.int/t/new-dataset-published-in-cds-cerra-land-time-series-sub-daily-regional-reanalysis-data-for-europe-from-1984-to-present/15321 "2026-09-22T11:15:21Z")
We are pleased to announce that a new dataset has been published today, September 2026, in the Climate Data Store (CDS): This dataset is a post-processed version of the original CDS CERRA-Land sub-daily regional rean… --- ## [Update your AI Weather Quest Python environment and review the new Terms and Conditions](https://forum.ecmwf.int/t/update-your-ai-weather-quest-python-environment-and-review-the-new-terms-and-conditions/15249)
**Author:** [@Joshua\_Talib](https://forum.ecmwf.int/u/Joshua_Talib)\ **Replies:** 18\ **Last updated:** [22 September 2026 08:59 UTC](https://forum.ecmwf.int/t/update-your-ai-weather-quest-python-environment-and-review-the-new-terms-and-conditions/15249 "2026-09-22T08:59:06Z")
Dear all, Those registered to the AI Weather Quest should have now received their new password for operations using the AI Weather Quest Python Package, and our new Terms and Conditions: Terms and Conditions for the AI… --- ## [Package version 3.32 no longer attempts to connect to FTP site](https://forum.ecmwf.int/t/package-version-3-32-no-longer-attempts-to-connect-to-ftp-site/15340)
**Author:** [@Joshua\_Talib](https://forum.ecmwf.int/u/Joshua_Talib)\ **Replies:** 0\ **Last updated:** [22 September 2026 08:58 UTC](https://forum.ecmwf.int/t/package-version-3-32-no-longer-attempts-to-connect-to-ftp-site/15340 "2026-09-22T08:58:20Z")
Hello all, Most participants have successfully transferred from FTP to ecBox. The FTP site has also been closed for a few weeks. In light of delayed processing times when connecting to FTP site (i.e. Update your AI Wea… --- ## [Unable to login to ECMWF FTP server - Connection closed after AUTH TLS command](https://forum.ecmwf.int/t/unable-to-login-to-ecmwf-ftp-server-connection-closed-after-auth-tls-command/14214)
**Author:** [@Wang\_longtsing](https://forum.ecmwf.int/u/Wang_longtsing)\ **Replies:** 5\ **Last updated:** [21 September 2026 15:22 UTC](https://forum.ecmwf.int/t/unable-to-login-to-ecmwf-ftp-server-connection-closed-after-auth-tls-command/14214 "2026-09-21T15:22:17Z")
Dear ECMWF Support Team, I hope this message finds you well. I’m encountering an issue when trying to connect to the ECMWF User FTP service (ftp.ecmwf.int). Despite multiple attempts, I cannot complete the login process… --- ## [Wind rotation question](https://forum.ecmwf.int/t/wind-rotation-question/15203)
**Author:** [@Eva\_Hdez](https://forum.ecmwf.int/u/Eva_Hdez)\ **Replies:** 2\ **Last updated:** [21 September 2026 12:15 UTC](https://forum.ecmwf.int/t/wind-rotation-question/15203 "2026-09-21T12:15:06Z")
We are interested in converting the grid-relative wind components provided in the CARRA dataset into earth-relative (true north/east) wind components, u\_earth and v\_earth. For the CARRA West domain we are using this code… --- ## [ERA-I:This service has been phased out](https://forum.ecmwf.int/t/era-i-this-service-has-been-phased-out/782)
**Author:** [@Mohammad\_Mohseni\_Are](https://forum.ecmwf.int/u/Mohammad_Mohseni_Are)\ **Replies:** 3\ **Last updated:** [21 September 2026 08:20 UTC](https://forum.ecmwf.int/t/era-i-this-service-has-been-phased-out/782 "2026-09-21T08:20:32Z")
I am trying to download ERA-I data using ECMWF app but it seems the data is not available. I was wondering if anyone can help in this regards HERE is error message ecmwf.API error 1: ERROR 170: This service has bee… --- ## [How to download daily average temperature data for all available counties in time series from 1990 - 2026?](https://forum.ecmwf.int/t/how-to-download-daily-average-temperature-data-for-all-available-counties-in-time-series-from-1990-2026/15319)
**Author:** [@Abhay\_Singh](https://forum.ecmwf.int/u/Abhay_Singh)\ **Replies:** 1\ **Last updated:** [18 September 2026 18:32 UTC](https://forum.ecmwf.int/t/how-to-download-daily-average-temperature-data-for-all-available-counties-in-time-series-from-1990-2026/15319 "2026-09-18T18:32:23Z")
Hi All, Could anyone please guide me on how can I get a daily average temperature data for all the available countries? --- ## [The ERA5 hourly on single level for 2m dewpoint temperature data for 1968 contain duplicate timestamps](https://forum.ecmwf.int/t/the-era5-hourly-on-single-level-for-2m-dewpoint-temperature-data-for-1968-contain-duplicate-timestamps/15331)
**Author:** [@Hui\_Wan](https://forum.ecmwf.int/u/Hui_Wan)\ **Replies:** 0\ **Last updated:** [18 September 2026 14:38 UTC](https://forum.ecmwf.int/t/the-era5-hourly-on-single-level-for-2m-dewpoint-temperature-data-for-1968-contain-duplicate-timestamps/15331 "2026-09-18T14:38:47Z")
Please double check the data. Thanks. --- ## [Open data - 9 km free subset](https://forum.ecmwf.int/t/open-data-9-km-free-subset/15325)
**Author:** [@Bertrand\_Forestier](https://forum.ecmwf.int/u/Bertrand_Forestier)\ **Replies:** 3\ **Last updated:** [18 September 2026 08:48 UTC](https://forum.ecmwf.int/t/open-data-9-km-free-subset/15325 "2026-09-18T08:48:56Z")
Dear ECMWF Support, We are integrating the ECMWF real-time open data (IFS oper and wave, 0.25°) into our forecast pipeline, and we are trying to size for the move to native resolution. Your UEF2025 slides (The Future o… --- ## [Complete ERA5 -- taking ages to download](https://forum.ecmwf.int/t/complete-era5-taking-ages-to-download/6701)
**Author:** [@Sid\_Gumber](https://forum.ecmwf.int/u/Sid_Gumber)\ **Replies:** 29\ **Last updated:** [16 September 2026 10:57 UTC](https://forum.ecmwf.int/t/complete-era5-taking-ages-to-download/6701 "2026-09-16T10:57:39Z")
I have been using complete ERA5 reanalysis data for 12 months now and the downloading has been all good and fine until a week ago. It has become extremely slow in the past week or so – ~4 hours of queuing/processing tim… --- ## [Ecmwf-opendata source="azure" failing – Planetary Computer SAS token endpoint certificate error](https://forum.ecmwf.int/t/ecmwf-opendata-source-azure-failing-planetary-computer-sas-token-endpoint-certificate-error/15327)
**Author:** [@Brian\_Gaze](https://forum.ecmwf.int/u/Brian_Gaze)\ **Replies:** 0\ **Last updated:** [15 September 2026 21:48 UTC](https://forum.ecmwf.int/t/ecmwf-opendata-source-azure-failing-planetary-computer-sas-token-endpoint-certificate-error/15327 "2026-09-15T21:48:11Z")
Since this evening (15 Sept), Client(source=“azure”) fails during initialisation. The SAS token request to https://planetarycomputer.microsoft.com/api/sas/v1/token/ai4edataeuwest/ecmwf returns an SSL error: \[SSL: CERT… [Next page](https://forum.ecmwf.int/latest.md?page=1)