What we do

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ECMWF's core mission is to:

  • produce numerical weather forecasts and monitor the Earth system;
  • carry out scientific and technical research to improve forecast skill;
  • maintain an archive of meteorological data.

To deliver this core mission, the Centre provides:

  • twice-daily global numerical weather forecasts;
  • air quality analysis;
  • atmospheric composition monitoring;
  • climate monitoring;
  • ocean circulation analysis;
  • hydrological prediction.

We also provide advanced training to scientific staff in our Member and Co-operating States and assist the World Meteorological Organization with its programmes. We make 25% of the supercomputing facilities available to Member States.

Streams of work

Global forecasts

ECMWF produces operational ensemble-based analyses and predictions that describe the range of possible scenarios and their likelihood of occurrence. ECMWF's forecasts cover time frames ranging from medium-range, to monthly and seasonal, and up to a year ahead.

Find out more about our global forecasts.

NWP science

ECMWF carries out research on all aspects of global weather prediction relevant to predictions up to one year ahead.

Find out more about NWP science.

Environmental services

ECMWF’s Integrated Forecasting System developing into a more complete Earth system model has created an opportunity to analyse and predict other aspects of the natural environment than purely the weather.

Find out more about our role in providing Environmental services.

Serving meteorology

By bringing together resources from across its Member and Co-operating States, ECMWF serves its community by providing world-leading weather forecasts, specialist software, and the largest meteorological data archive in the world.

Find out more about serving meteorology.


Improving the skill and detail of ECMWF predictions is a computationally expensive process. ECMWF's high-performance computing facility has always been amongst the most powerful in Europe and provides users with leading-edge HPC technologies.

Find out more about supercomputing at ECMWF.