Key facts and figures

An overview of who we are can be found in the Who we are section. Below, we offer a breakdown of some of the essential facts relating to our work (as of July 2019).



  • The Member and Co-operating States of ECMWF are the principal source of finance for the Centre, with contributions totalling £43.5 million in 2018.
  • External organisations support both core research and the complementary goals of the Centre. In 2018 their funding totalled £55.5 million, while revenue from sales of data and products provided additional income of over £9.5 million.
  • The sponsorship department in the UK Government for ECMWF is the Department for Business, Energy and Industrial Strategy (BEIS).


  • The term 'medium range' refers to time periods up to about 2 weeks ahead. Extended forecasts are also produced for monthly and seasonal timescales.
  • The weather services of ECMWF Member States receive ECMWF's numerical weather prediction data in real time – 24 hours a day, 7 days a week.
  • Forecasts are produced four times per day for weather services and commercial customers.
  • Commercial licences are held by customers in over 30 countries.
  • ECMWF uses advanced computer modelling techniques to analyse observations and predict future weather.
  • ECMWF routinely processes data from around 90 satellite data products as part of its operational daily data assimilation and monitoring activities. A total of 40 million observations are processed and used daily; the vast majority of these are satellite measurements, but ECMWF also benefits from all available observations from non-satellite sources, including surface-based and aircraft reports.


  • ECMWF has research partnerships with national meteorological services of the Member States and Co-operating States.
  • We also carry out a number of research projects coordinated and financed through the European Union, European space agencies and national funding sources.


  • ECMWF's supercomputers are among the largest of their type in Europe.
  • Our supercomputers operate with a sustained speed of more than 330 trillion floating point operations per second (330 teraflops).
  • Our supercomputers serve a variety of purposes, with 50% capacity used for research, 25% used by Member States and 25% used for production of operational forecasts.
  • The ECMWF meteorological data archive (MARS) is the largest in the world and continues to grow. As of December 2018, it contains around 225 petabytes of operational and research data, with about 250 terabytes being added daily. More than 400 billion meteorological fields are stored in MARS.