# How to download hourly forecast variables from 'reanalysis-era5-complete'?

**URL:** <https://forum.ecmwf.int/t/how-to-download-hourly-forecast-variables-from-reanalysis-era5-complete/865>\
**Category:** API\
**Tags:** api, c3s, era5\
**Created:** [22 June 2019 14:01 UTC](https://forum.ecmwf.int/t/how-to-download-hourly-forecast-variables-from-reanalysis-era5-complete/865 "2019-06-22T14:01:08Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Oliver\_Gutjahr](https://forum.ecmwf.int/letter_avatar_proxy/v4/letter/o/a698b9/32.png) [@Oliver\_Gutjahr](https://forum.ecmwf.int/u/Oliver_Gutjahr)\
**Post date:** [22 June 2019 14:01 UTC](https://forum.ecmwf.int/t/how-to-download-hourly-forecast-variables-from-reanalysis-era5-complete/865/1 "2019-06-22T14:01:08Z")

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I want to download some forecast variables that are not contained in the 'reanalysis-era5-single-levels'. But I am not sure how the cds-api script has to look like.

For instance, to download hourly wind stress in u-direction for one year (1999) I use is this script:

reanalysis-era5-complete  
 { "class": "ea",   
 "dataset": "era5",   
 "date": "1999-01-01/to/1999-12-31",   
 "expver": "1",   
 "format": "grib",   
 "grid": "0.25/0.25",   
 "levtype": "sfc",   
 "param": "169.128",   
 "step": "1/to/12/by/1",   
 "stream": "oper",   
 "time": "06:00:00/18:00:00",   
 "type": "fc" }

Is this the correct way and is it also correct that the first 6h are missing? (it will also download the first 6h of the next year).&nbsp;

Thanks for any help and advise,  
 Oliver

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**Author:** ![Xiaobo\_Yang](https://forum.ecmwf.int/letter_avatar_proxy/v4/letter/x/e495f1/32.png) [@Xiaobo\_Yang](https://forum.ecmwf.int/u/Xiaobo_Yang)\
**Post date:** [24 June 2019 08:15 UTC](https://forum.ecmwf.int/t/how-to-download-hourly-forecast-variables-from-reanalysis-era5-complete/865/2 "2019-06-24T08:15:27Z")

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Yes, Oliver. Because the first forecast you can get is from 06 UTC (which is different from ERA-Interim).

For more information, please have a look at some knowledge base articles below:

- [ERA5: data documentation](https://confluence.ecmwf.int/display/CKB/ERA5%3A+data+documentation)
- [How to download ERA5](https://confluence.ecmwf.int/display/CKB/How+to+download+ERA5)

Kind regards,

Xiaobo