The Lead Centre Centres for Sub-seasonal Predictions Seasonal Prediction Multi-Model Ensemble (LC-SSPMME) coordinates as well as Global Producing Centres for Sub-seasonal Predictions (GPC-SSP) are the latest additions to the WMO infrastructure for operational climate predictions. A brief description of LC-SSPMME and GPC-SSP roles is given below. For further information see the WMO Integrated Processing and Prediction System (WIPPS).

Lead Centres for Sub-Seasonal Prediction Multi-Model Ensemble coordinate multi-model ensembles of sub-seasonal forecasts by maintaining an archive containing a set of selected model fields, by creating graphical products from individual and multi-model ensembles under an agreed format and by creating verification statistics.

Currently eight centres (referred as contributing centres) have agreed to provide the WMO LC-SSPMME with their forecast without the 3-weeks latency imposed by the S2S data policy. Based on this data, the LC will publish the forecast charts (individual and multi-model) once a week. The charts, based on the forecasts initialized around Thursday, will be updated every Monday to give enough time for data collection.

Considering that LC will provide a timelier service, please use the updated list of contact point in case of problem with reception/encoding of data or to exchange feedbacks about forecast information.

If you want to access to graphical products, please follow this link; https://charts.ecmwf.int/wmo/

Points of contact for WMO Teams

(SC-ESMP/ ET-OCPS)

Points of contact for

Technical issues

The list of LC-SSPPMME functions include:

generate subseasonal forecasts from individual model and multi-model combination
publish the forecasts in a standard format and on a regular basis
maintain an archive of the forecast data generated by the GPC-SSP
maintain a repository of documentation for the system configuration of all GPC-SSP systems
provide verification statistics based on reforecast data according to the WMO standard

To provide WMO Members with reliable multi-model ensembles in real time,the LC-SSPMME usesforecast data from several sub-seasonal prediction systems.Forecast data is provided by WMO Global Producing Centres for Sub-seasonal Predictions (GPC-SSP) and by Contributing Centres.

Global Producing Centres for Sub-seasonal Predictions are required to fulfill a set of mandatory functions aiming to enhance consistency and usability of forecast information and to facilitate the exchange of data. For example, GPCs agree to:

generate subseasonal global forecast, with at least weekly frequency
make available a defined set of forecast products for a minimum set of variables including 2mt, SST and precipitation
produce verification statistics according to the WMO standard.
provide forecast and hindcast to the LC-SSPMME on a regular schedule
make available up-to-date information about their subseasonal forecast system.

Contributing Centres provide the forecast data to the LC-SSPMMEbut have not yet committed to function as GPC-SSP.This is a special arrangement for operational centres that potentially meet GPC-SSP criteria. This provision will be terminated in the next few years to strongly encourage the centres to apply for a formal GPC-SSP designation.