The Lead Centre Centres for Sub-seasonal Predictions Seasonal Prediction Multi-Model Ensemble (LC-SSPMME) 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 ) coordinates 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.  The roles of Lead Centres for Sub-seasonal Predictions Multi-model Ensemble (LC-SSPMME) as well as the role of Global Producing Centre 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) are the latest additions to the WMO infrastructure for operational climate predictions. and by Contributing Centres. 

Global Producing Centres for Sub-seasonal Predictions GPC-SSP GPCs 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 provide:

• a defined standard set of forecast products (var, prob, averages, lead time).
• forecast with regular frequency.
• skill assessment based on the WMO standard verification measures.
• data to the WMO Lead Centre on a regular schedule.

functions are similar to the ones of the Global Producing Centres for Long Range Forecast (GPC-LRF) and for Annual to Decadal Climate predictions (GPC-ADCP).

GPC-SSF are requested to:

• generate

  SSF

  subseasonal global forecast, with at least weekly frequency

• make available a defined set of forecast products

  (prob terc. For weekly averages of

  for a minimum set of variables including 2mt, SST and

  precip)

  precipitation

• produce verification statistics according to the WMO standard.

• provide forecast and hindcast to

  LCs-SSFMME

  the LC-SSPMME on a regular schedule

• make available up-to-date information about their

  SSF

  subseasonal forecast system.

LC-SSFMME is also a recent addition. WMO Lead Centres for seasonal (long-range) and Decadal have been in place for some time.  The role of the LC-SSFMME is very similar to the role of the existing WMO Lead Centres. The only difference is that it deals with sub-seasonal predictions. The LC-SSFMME coordinates 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.

To add confusion to this ocean of long acronyms, WMO has recently decided to modify its language so that “seasonal prediction” replaces “Long-range forecast” and “sub-seasonal prediction” replaces “Sub-seasonal forecast”. As a result, we now refer GPC-LRF/GPC-SSF to GPC-SP and GPC-SSP and equally LC-LRFMME/LC_SSFMME will be LC-SPMME and LC-SSPMME.

list of LC-SSPPMME functions 

reference to the manual.

Role of GPC-SSP  reference ....

explain content of the subpages:

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.

Forecast digital data

Forecast charts

Verification