Advancing global NWP through international collaboration

High resolution mean sea level pressure and ensemble spread

Friday 18 January, 12 UTC T+96 Valid: Tuesday 22 January, 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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SciArt Louise Arnal

A journey through science and art

Louise Arnal is a scientist with a lifelong love of art. Here she explores the relationship between art and science and talks about her involvement in a number of SciArt projects.

18 December 2018


2018 Hurricane Florence in ERA5 and ERA-Interim

New ERA5 dataset provides weather and climate details back to 1979

ECMWF’s new atmospheric reanalysis, ERA5, provides a detailed picture of the global weather and climate back to 1979 after the Copernicus Climate Change Service, implemented by ECMWF on behalf of the EU, released the latest tranche of ERA5 data.

17 January 2019

Newsletter cover images montage

Diverse project work 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.

11 January 2019

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.

EFI extreme snowfall plots for 5 Jan 19

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The extreme snowfall seen in parts of Europe last weekend had high predictability, as highlighted by consistently high Extreme Forecast Index (EFI) and Shift of Tails (SOT) values for Saturday 5 January 2019 from as early as 31 December 2018.


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.