Advancing global NWP through international collaboration

High resolution mean sea level pressure and ensemble spread

Sunday 20 October, 00 UTC T+96 Valid: Thursday 24 October, 00 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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SCIENCE BLOG

Receding waters after Idai

Forecasting tropical cyclones and flooding

To mark the UN International Day for Disaster Risk Reduction on 13 October, Linus Magnusson discusses ECMWF forecasts of tropical cyclones and the destructive floods that can result.

11 October 2019
NEWS
NEWS
IN FOCUS

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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.

Highlighted tweet 6 Sep 2019

Highlighted tweet

Hurricane #Dorian stalled for more than 24 hours over the Bahamas. In ECMWF's forecasts this development was first reflected three to four days in advance, as shown here in the forecast from 12 UTC on 30 August.

Datasets

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.

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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.