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Table of Contents
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2018

Info
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title18-9-2018 CMC forecast system change

The CMC global ensemble prediction system (origin cwao in the TIGGE archive) was upgraded to version 5.0.0 on 18 September 2018.

The main changes in this upgrade are:

  • The 800x400 global Gaussian grid at 50 km resolution is updated to a Yin-Yang grid at 39 km resolution
  •   The model top is raised from 2 hPa to 0.1 hPa.
  •  In the ensemble Kalman filter assimilation component, the digital filter initialization is replaced by an incremental analysis update (IAU) procedure. 

More information on this operational upgrade can be found here....


Info
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title13-09-2018 HW issue affecting some TIGGE data availability

We have recently experienced a hardware incident with a tape volume becoming damaged. Users trying to access data described below will get an error message until the problem is resolved.

Affected data:

  • type = cf
  • levtype = pl
  • ranges: 2017/06/09 to 2017/06/10,   2017/08/03 to 2017/10/23  and 2018/01/24 to 2018/08/26

The expected data recovery is in 2-4 weeks in case of success. We apologise for any inconvenience.

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