# Wrong 2m dewpoint temperature data in Météo-France System8 seasonal forecast data

**URL:** <https://forum.ecmwf.int/t/wrong-2m-dewpoint-temperature-data-in-meteo-france-system8-seasonal-forecast-data/1458>\
**Category:** C3S - Announcements\
**Tags:** seasonal\_forecast, c3s\
**Created:** [12 October 2021 13:30 UTC](https://forum.ecmwf.int/t/wrong-2m-dewpoint-temperature-data-in-meteo-france-system8-seasonal-forecast-data/1458 "2021-10-12T13:30:56Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Eduardo\_Penabad](https://forum.ecmwf.int/letter_avatar_proxy/v4/letter/e/6a8cbe/32.png) [@Eduardo\_Penabad](https://forum.ecmwf.int/u/Eduardo_Penabad)\
**Post date:** [12 October 2021 13:30 UTC](https://forum.ecmwf.int/t/wrong-2m-dewpoint-temperature-data-in-meteo-france-system8-seasonal-forecast-data/1458/1 "2021-10-12T13:30:56Z")

</div>

An issue with sporadic anomalous values in " **2m** &nbsp; **dewpoint temperature**" from&nbsp; **Météo-France System8** &nbsp;has been identified. The details can be found in the section "Fixed errors" under the code E9 of our&nbsp;["Known issues" page](https://confluence.ecmwf.int/display/CKB/C3S+Seasonal+Forecast+known+issues)

- It only affects hindcast data from&nbsp; **member 3** &nbsp;for&nbsp; **October 2009** , both high frequency data ([seasonal-original-single-levels](https://cds.climate.copernicus.eu/cdsapp#!/dataset/seasonal-original-single-levels)) and&nbsp; **monthly** &nbsp;statistics ([seasonal-monthly-single-levels](https://cds.climate.copernicus.eu/cdsapp#!/dataset/seasonal-monthly-single-levels)). 
  - A very reduced amount of grid points and time steps present erroneous values of 1.e+20

- The data described might be affected by this issue if retrieved&nbsp; **after its publication on 16th September 2021 and before the completion of the re-archival** &nbsp;of the amended version (see details in "Known issues" page)