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Table of Contents
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2021

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title30-04-2021 Wrong 2 metre minimum and maximum temperature in Meteo-France data

After the  Meteo-France recent model upgrade to the version CNRM-CM6, there is an issue with 2 metre minimum and maximum temperature. Both fields contain the mean 2-meter temperature over the past 6 hours instead of the correct values of 2 metre minimum and maximum temperature. This error affects both the real-time data since the real-time forecasts since the 22nd October 2020 and also the corresponding set of the fixed reforecasts (1993-2017) archived under the model version date 2019-07-01. As this error cannot be easily fixed in the reforecast data,  it was decided not to fix for consistency the real-time forecast fields either.

For more details go directly to the page Issues with data.


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title12-04-2021 JMA model system change

Change of the model version to GEPS2103 has applied  to the real-time forecasts since the 30th March 2021. The new JMA real-time ensemble system includes 2 start dates (Tuesdays and Wednesdays at 12Z) instead of the previous 4 runs. The ensemble size is 25 members for both days and the resulting new lagged ensemble for S2S is a single 50-member ensemble starting on Wednesdays at 12Z.

The new set of the fixed reforecasts (1981-2020) will be archived later during 2021. More information can be found in the pages JMA Model#JGEPS2103 and  JMA Model Description GEPS2103.

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