Advancing global NWP through international collaboration

High resolution mean sea level pressure and ensemble spread

Monday 22 October, 12 UTC T+96 Valid: Friday 26 October, 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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Forty-one visions for high-performance computing in meteorology

Sami Saarinen, one of the organisers of the 18th Workshop on High-Performance Computing in Meteorology at ECMWF from 24 to 28 September 2018, goes back over some of the highlights from 41 talks, two panel discussions and a vendors' exhibition.

10 October 2018

Autumn 2018 Newsletter published

The autumn 2018 issue of the ECMWF Newsletter is now available. As well as news about ECMWF staff and events, it features articles about new developments and the use that can be made of ECMWF products.

19 October 2018

International Day for Disaster Reduction: the role of weather prediction

Every 13 October, the UN-sponsored International Day for Disaster Reduction celebrates how people and communities around the world are reducing their exposure to disasters. From storms, droughts and heatwaves to floods and wildfires, many disasters are weather-related.

12 October 2018

Corn harvest destroyed by drought

ECMWF extended-range forecasts and the European heatwave of summer 2018

The heatwave of summer 2018 highlighted the skill and value of our extended-range (sub-seasonal) forecasts. Forming part of ECMWF's seamless prediction system, the extended range falls between the medium- and long-range (seasonal) timescales. Forecasts on the extended-range timescale are scientifically challenging, but skill has been increasing steadily.

1 October 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.

Hurricane Leslie landfall in Portugal

Plot of the week

The position of Hurricane Leslie before making landfall in Portugal was challenging to predict – it was too far south in our analysis and forecast when compared with the positions provided by the US National Hurricane Center.


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.

Collaboration banner

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.