# March 2025 ECMWF seasonal forecast invalid request

**URL:** <https://forum.ecmwf.int/t/march-2025-ecmwf-seasonal-forecast-invalid-request/11760>\
**Category:** C3S - Datasets and Usage\
**Tags:** seasonal\_forecast\
**Created:** [7 March 2025 13:31 UTC](https://forum.ecmwf.int/t/march-2025-ecmwf-seasonal-forecast-invalid-request/11760 "2025-03-07T13:31:16Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Tyler\_Cox](https://forum.ecmwf.int/letter_avatar_proxy/v4/letter/t/6de8d8/32.png) [@Tyler\_Cox](https://forum.ecmwf.int/u/Tyler_Cox)\
**Post date:** [7 March 2025 13:31 UTC](https://forum.ecmwf.int/t/march-2025-ecmwf-seasonal-forecast-invalid-request/11760/1 "2025-03-07T13:31:16Z")

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Hi,  
Trying to download sea surface temperature from ECMWF system #51 for the recently released March seasonal forecast. Have attempted to use both the API and online interface and receive this error:

invalid request  
Error id: ff8a95f3-962b-4efa-8cae-60fb76053423

API request as provided by the web interface:

 ![image](https://forum.ecmwf.int/uploads/default/original/1X/97cdd6d27da7f64a181ae13a15f247320cc84d5e.png)

I had similar issues for the February forecast release, but they were resolved after a few days. Do ECMWF seasonal forecasts still get released on the 6th of each month or am I doing something else wrong?

Thanks,  
Tyler

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**Author:** ![Michela](https://forum.ecmwf.int/letter_avatar_proxy/v4/letter/m/898d66/32.png) [@Michela](https://forum.ecmwf.int/u/Michela)\
**Post date:** [17 March 2025 10:30 UTC](https://forum.ecmwf.int/t/march-2025-ecmwf-seasonal-forecast-invalid-request/11760/2 "2025-03-17T10:30:20Z")

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Hi,  
can you try now?  
Thanks

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<div class="post-metadata">

**Author:** ![Tyler\_Cox](https://forum.ecmwf.int/letter_avatar_proxy/v4/letter/t/6de8d8/32.png) [@Tyler\_Cox](https://forum.ecmwf.int/u/Tyler_Cox)\
**Post date:** [21 March 2025 17:53 UTC](https://forum.ecmwf.int/t/march-2025-ecmwf-seasonal-forecast-invalid-request/11760/3 "2025-03-21T17:53:32Z")

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Hi Michela,  
Works great now. In both Feb. and March there seemed to be a ~2 day delay between when data was officially released and when I was able to download it.  
Thanks,  
Tyler