# Snowfall variable available on "ERA5 hourly data on single levels from 1940 to present" but not on "Complete ERA5 global atmospheric reanalysis"?

**URL:** <https://forum.ecmwf.int/t/snowfall-variable-available-on-era5-hourly-data-on-single-levels-from-1940-to-present-but-not-on-complete-era5-global-atmospheric-reanalysis/14774>\
**Category:** AIFS\
**Tags:** aifs, era5\
**Created:** [9 March 2026 09:19 UTC](https://forum.ecmwf.int/t/snowfall-variable-available-on-era5-hourly-data-on-single-levels-from-1940-to-present-but-not-on-complete-era5-global-atmospheric-reanalysis/14774 "2026-03-09T09:19:35Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Soulivanh\_Thao](https://forum.ecmwf.int/letter_avatar_proxy/v4/letter/s/58f4c7/32.png) [@Soulivanh\_Thao](https://forum.ecmwf.int/u/Soulivanh_Thao)\
**Post date:** [9 March 2026 09:19 UTC](https://forum.ecmwf.int/t/snowfall-variable-available-on-era5-hourly-data-on-single-levels-from-1940-to-present-but-not-on-complete-era5-global-atmospheric-reanalysis/14774/1 "2026-03-09T09:19:35Z")

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Hello,

I trying to learn how to use anemoi by trying to retraining AIFS 1.10 with the procedure noted in the huggingface notebook.

To do that, I am trying to download with (anemoi-datasets or the CDS API) the relevant variables on the n320 grid from the “Complete ERA5 global atmospheric reanalysis”. There is 4 variables I need that are not found on this dataset:

- snowfall (sf)
- runoff (ro)
- surface\_solar\_radiation\_downwards (ssrd)
- surface\_thermal\_radiation\_downwards (strd)

But those variables are available on the “ERA5 hourly data on single levels from 1940 to present” of the CDS.

Is it normal ?

Thanks your help !

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**Author:** ![Julian\_Schmitt](https://forum.ecmwf.int/letter_avatar_proxy/v4/letter/j/f14d63/32.png) [@Julian\_Schmitt](https://forum.ecmwf.int/u/Julian_Schmitt)\
**Post date:** [9 March 2026 22:11 UTC](https://forum.ecmwf.int/t/snowfall-variable-available-on-era5-hourly-data-on-single-levels-from-1940-to-present-but-not-on-complete-era5-global-atmospheric-reanalysis/14774/2 "2026-03-09T22:11:51Z")

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Hi **[Soulivanh\_Thao](https://forum.ecmwf.int/u/soulivanh_thao),**

Try requesting these variables via the following block in `input.join` along with other requests (e.g., for pressure and other surface variables):

```yaml
 - accumulations:
      use_cdsapi_dataset: "reanalysis-era5-complete"
      class: ea
      type: an
      stream: oper
      expver: '0001'
      grid: N320
      levtype: sfc
      param:
      - sf
      - ro
      - strd
      - ssrd
      step: 6

```

Possibly your error had to do with the accumulations flag.

Best,

Julian

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**Author:** ![Soulivanh\_Thao](https://forum.ecmwf.int/letter_avatar_proxy/v4/letter/s/58f4c7/32.png) [@Soulivanh\_Thao](https://forum.ecmwf.int/u/Soulivanh_Thao)\
**Post date:** [10 March 2026 12:28 UTC](https://forum.ecmwf.int/t/snowfall-variable-available-on-era5-hourly-data-on-single-levels-from-1940-to-present-but-not-on-complete-era5-global-atmospheric-reanalysis/14774/3 "2026-03-10T12:28:50Z")

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Thanks, it worked! Indeed, I did not put sf, ro, strd, ssrd under the accumulations flag.