Advancing global NWP through international collaboration

High resolution mean sea level pressure and ensemble spread

Saturday 24 August, 12 UTC T+96 Valid: Wednesday 28 August, 12 UTC

Ensemble forecasts explained
One 'ensemble forecast' consists of 51 separate forecasts made by the same computer model, all activated from the same starting time. The starting conditions for each member of the ensemble are slightly different, and physical parameter values used also differ slightly. The differences between these ensemble members tend to grow as the forecasts progress, that is as the forecast lead time increases.

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The WMO Integrated Global Observing System (WIGOS), card size

Why we need to protect weather prediction from radio frequency interference

Stephen English explains why, in a world hungry for the use of radio frequencies in new applications, the meteorological community needs to be clear about their critical value for weather prediction.

15 August 2019


Wildfire in Greenland July 2019

Unusual Arctic wildfire activity continues into August

Unusually high levels of wildfire activity within the Arctic Circle monitored since the second week of June 2019 have continued well into August, data from the EU-funded Copernicus Atmosphere Monitoring Service implemented by ECMWF show.

21 August 2019

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In focus

Articles presenting ECMWF’s involvement in diverse areas, from our graduate training programme and support for national and international initiatives to information on publications such as our User Guide.

Forecast charts and data

We provide current forecasts, climate reanalyses and specific datasets. These are available via the web, point-to-point dissemination, data servers and broadcasting.

CAMS aerosol forecast for 00 UTC 14 July 2019

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The global forecasting system of the Copernicus Atmosphere Monitoring Service @CopernicusECMWF @CopernicusEU was successfully upgraded on 9 July. Find out how the changes improve #airquality forecasts:


Forecasts, analyses, climate re-analyses, reforecasts and multi-model data are available from our archive (MARS) or via dedicated data servers or via point-to-point dissemination.

Accessing forecasts

Researchers, WMO members, commercial users and satellite data providers can gain access to ECMWF forecast products under one of our various license agreement types.

Advancing weather science

Education is a key element of our work at ECMWF, enabling our partners to get the most from ECMWF's services and develop an advanced understanding of forecasting.

ECMWF lecture theatre

ECMWF workshops are open to the worldwide meteorological community, though some training is restricted to member states.

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Serving meteorology

International collaboration is fundamental to the work of ECMWF, working with the EU and the meteorological community at large, including the World Meteorological Organization, space agencies, and scientists around the world.