Advancing global NWP through international collaboration

High resolution mean sea level pressure and ensemble spread

Wednesday 15 August, 12 UTC T+96 Valid: Sunday 19 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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Improving forecasts with new wind data from ESA's Aeolus mission

At ECMWF we are very excited about the prospect of using the novel space-based wind profile information of Aeolus to improve our weather forecasts. We are proud to take a significant role in the operational Ground Segment processing and in the expert teams that will work on achieving a useful wind product.

6 August 2018

News highlights January to July 2018

The first seven months of 2018 at ECMWF have seen a major upgrade of the Integrated Forecasting System; a series of events to drive forward numerical weather prediction; the launch of the Climate Data Store; and the appointment of a new Director of Computing.

30 July 2018

ECMWF makes more data freely available to WMO Members

ECMWF has substantially increased the amount of weather prediction data it makes available free of charge to Members of the World Meteorological Organization. The provision of the data is part of the Centre’s obligations as a World Meteorological Centre.

23 July 2018

Newsletter cover images montage

ECMWF Newsletter back issues available online

Back issues of the ECMWF Newsletter previously only published in paper form are now available in our eLibrary, along with all Newsletter feature articles published since spring 2005.

23 July 2018

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.

Maximum temperatures in Europe from 29 July to 6 August 2018, expresed in Celsius.

Plot of the week

The recent heatwave has seen extreme temperatures in many countries across Europe. The map shows ECMWF analysis of maximum temperatures from 29 July to 6 August 2018, expressed in Celsius.


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.