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title02-12-2024 Reduction of S2S data delay for users

The previous availability of S2S data to users (3 weeks)  has changed based on agreement with data providers. The new, in most cases shorter, delay supported by WMO and depending on the contributor's decision is now:

Organisation (origin)Delay  restriction
ECCC (cwao), UKMO (egrr) 3 weeks
BoM (ammc), CNRM (lfpw)1 week

CMA (babj), CNR-ISAC (isac), CPTEC (sbsj),

ECMWF (ecmf), HMCR (rums), IAP-CAS (anso),

JMA (rjtd), KMA (rksl), NCEP (kwbc)

48 hours
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title12-11-2024 ECMWF forecast system change

The ECMWF model has been upgraded to the version 49r1 with major changes among many others:

  • assimilation of 2m temperature observations, 
  • Land-surface model updates,
  • increased resolution and soft-recentering of the ensemble of data assimilations (EDA)  and
  • activation of the stochastically perturbed parameterisations (SPP) model uncertainty scheme in all ensemble configurations. 

The main changes to S2S contribution from ECMWF are:

  • The re-forecasts frequency changed to every two days: 1/3/5/7/9/11/13/15/17/19/21/23/25/27/29/31 (excluding 29 February)
  • The parameter CAPE (59) was discontinued and replaced by MUCAPE (228235). For consistency (in S2S), that parameter is still encoded as before (paramId=59).

The first realtime forecasts and on-the-fly reforecasts runs with the new cycle were on 13/11/2024

More details can be found in ECMWF Model and Implementation of IFS Cycle 49r1

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