European Centre for Medium-Range Weather Forecasts
The DWD was formed in 1952 when the weather services of the western occupation zones were merged. In 1954, the Federal Republic of Germany joined the World Meteorological Organization (WMO). In 1975 the European Centre for Medium-Range Weather Forecasts (ECMWF) was formed for numerical weather prediction up to ten days in advance. In 1990, following the reunification, the weather services of the German Democratic Republic were incorporated in the DWD.