# Still missing era5 hourly data t2m timestamps (2023-09-11 22:00 and 23:00) after 6 days **URL:** \ **Category:** C3S - Datasets and Usage\ **Tags:** access, c3s, era5\ **Created:** [18 September 2023 12:13 UTC](https://forum.ecmwf.int/t/still-missing-era5-hourly-data-t2m-timestamps-2023-09-11-22-00-and-23-00-after-6-days/1238 "2023-09-18T12:13:15Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Philippe\_Malcorps](https://forum.ecmwf.int/letter_avatar_proxy/v4/letter/p/f4b2a3/32.png) [@Philippe\_Malcorps](https://forum.ecmwf.int/u/Philippe_Malcorps)\ **Post date:** [18 September 2023 12:13 UTC](https://forum.ecmwf.int/t/still-missing-era5-hourly-data-t2m-timestamps-2023-09-11-22-00-and-23-00-after-6-days/1238/1 "2023-09-18T12:13:15Z")
Dear all, I am running a daily pipeline to download specific variables from reanalysis-era5-single-levels using the CDS API, to retrieve the data from the date 7 days in the past. The today pipeline that corresponds to requests for the day 2023-09-11 failed for some of my variables (like "2m temperature) because of missing data (timestamps 2023-09-11 22:00 and 23:00). I checked it also manually on [https://cds.climate.copernicus.eu/cdsapp#!/dataset/reanalysis-era5-single-levels?tab=form](https://cds.climate.copernicus.eu/cdsapp#!/dataset/reanalysis-era5-single-levels?tab=form) and indeed these values are missing even after ~7 days. While as I understand it should be available after ~5 days. My pipeline was running smoothly until today. Do you know why these data are not available? Am I the only one experimenting this? Thanks, Philippe ---
**Author:** ![Alina\_Gainusa-Bogdan](https://forum.ecmwf.int/letter_avatar_proxy/v4/letter/a/f0a364/32.png) [@Alina\_Gainusa-Bogdan](https://forum.ecmwf.int/u/Alina_Gainusa-Bogdan)\ **Post date:** [18 September 2023 13:58 UTC](https://forum.ecmwf.int/t/still-missing-era5-hourly-data-t2m-timestamps-2023-09-11-22-00-and-23-00-after-6-days/1238/2 "2023-09-18T13:58:55Z")
I am seeing the same thing as Philippe. I am equally interested to know what the increased time lag from present is due to. Thanks to anyone who can share information on this.  ---
**Author:** ![Michela](https://forum.ecmwf.int/letter_avatar_proxy/v4/letter/m/898d66/32.png) [@Michela](https://forum.ecmwf.int/u/Michela)\ **Post date:** [19 September 2023 15:09 UTC](https://forum.ecmwf.int/t/still-missing-era5-hourly-data-t2m-timestamps-2023-09-11-22-00-and-23-00-after-6-days/1238/3 "2023-09-19T15:09:33Z")
Hi,  please try again to request the data. Thanks ---
**Author:** ![Alina\_Gainusa-Bogdan](https://forum.ecmwf.int/letter_avatar_proxy/v4/letter/a/f0a364/32.png) [@Alina\_Gainusa-Bogdan](https://forum.ecmwf.int/u/Alina_Gainusa-Bogdan)\ **Post date:** [19 September 2023 15:56 UTC](https://forum.ecmwf.int/t/still-missing-era5-hourly-data-t2m-timestamps-2023-09-11-22-00-and-23-00-after-6-days/1238/4 "2023-09-19T15:56:49Z")
Thank you for the reply, Michela! The data is back up to date now. I take it that this was a temporary technical issue. Are there any reasons to expect it to happen again these days (is there something specific being changed in the system), or was this, a priori, a one-time issue? Thank you again. ---
**Author:** ![Philippe\_Malcorps](https://forum.ecmwf.int/letter_avatar_proxy/v4/letter/p/f4b2a3/32.png) [@Philippe\_Malcorps](https://forum.ecmwf.int/u/Philippe_Malcorps)\ **Post date:** [20 September 2023 09:11 UTC](https://forum.ecmwf.int/t/still-missing-era5-hourly-data-t2m-timestamps-2023-09-11-22-00-and-23-00-after-6-days/1238/5 "2023-09-20T09:11:44Z")
Thank you [Michela Giusti](https://confluence.ecmwf.int/display/~usmg), the missing data have been added! As [Alina Gainusa-Bogdan](https://confluence.ecmwf.int/display/~a.gainusa@rockwinds.com), I'm also interested to know if it was a one-time issue or not? To eventually delay my daily pipeline.  Thank you, Philippe ---
**Author:** ![Philippe\_Malcorps](https://forum.ecmwf.int/letter_avatar_proxy/v4/letter/p/f4b2a3/32.png) [@Philippe\_Malcorps](https://forum.ecmwf.int/u/Philippe_Malcorps)\ **Post date:** [20 September 2023 13:10 UTC](https://forum.ecmwf.int/t/still-missing-era5-hourly-data-t2m-timestamps-2023-09-11-22-00-and-23-00-after-6-days/1238/6 "2023-09-20T13:10:26Z")
In fact, we saw that there are still missing timestamps for some of the variables like u10 or v100, but surprisingly only when you request these variables alone. If you request a bunch of variables together, there are no missing values anymore, even for u10 and u100. Very strange. Could it be due to some problems with the caching on ECMWF side?  ---
**Author:** ![Michela](https://forum.ecmwf.int/letter_avatar_proxy/v4/letter/m/898d66/32.png) [@Michela](https://forum.ecmwf.int/u/Michela)\ **Post date:** [20 September 2023 17:08 UTC](https://forum.ecmwf.int/t/still-missing-era5-hourly-data-t2m-timestamps-2023-09-11-22-00-and-23-00-after-6-days/1238/7 "2023-09-20T17:08:42Z")
Hi, the issue was temporary. Please have a look at the following link for details about cache issue: [https://prod.ecmwf-forum-prod.compute.cci2.ecmwf.int/t/how-to-avoid-the-cds-cache-issue/905](https://prod.ecmwf-forum-prod.compute.cci2.ecmwf.int/t/how-to-avoid-the-cds-cache-issue/905) Thanks