The Consortium for Small-scale Modeling (COSMO) was formed in October 1998. Its general goal is to develop, improve and maintain a non-hydrostatic limited-area atmospheric model, that has been used both for operational and for research applications by the members of the consortium. Moreover, within a licence , the COSMO model has been used for operational and research applications by other national (hydro-)meteorological services, universities and research institutes.
The COSMO science plan called for a harmonization of development of the COSMO and ICON (ICOsahedral Nonhydrostatic) models in the time horizon of 2020-21. Further development of the COSMO model was reduced since 2019 and the final version (v3.0) was released in 15 Dec. 2021. Development and testing of new features are now restricted to ICON.
Today, the consortium, has as members these national meteorological services (presented in date-of-join order) :
Note: Roshydromet is suspended temporarily from COSMO activities.
Germany                        DWD Deutscher Wetterdienst
Switzerland                    MCH MeteoSchweiz
Italy                                ITAF Met Italian Air Force Meteorological Service
Greece                           HNMS Hellenic National Meteorological Service
Poland                           IMGW Institute of Meteorology and Water Management
Romania                        NMA National Meteorological Administration
Russia                            RHM Federal Service for Hydrometeorology and Environmental Monitoring
Israel                              IMS Meteorological Service of Israel

These regional and military services within the member states are also participating:
Germany ZGeoBw Zentrum für GeoInformationswesen der Bundeswehr
     
Italy CIRA Centro Italiano Ricerche Aerospaziali
     
Italy ARPAE Agenzia Regionale per la Prevenzione, l´ Ambiente e l´Energia Emilia Romagna
     
Italy ARPA Piemonte Agenzia Regionale per la Protezione Ambientale Piemonte
     
Italy CMCC Centro euro-Mediterraneo sui Cambiamenti Climatici
     
Italy CIMA Centro Internazionale in Monitoraggio Ambientale
     
Italy CETEMPS Center of Excellence Telesensing of Environment and Model Prediction of Severe events
     
Italy ItaliaMeteo Italian national Meteorology and Climatology Agency