Advancing global NWP through international collaboration

High resolution mean sea level pressure and ensemble spread

Sunday 21 April, 00 UTC T+96 Valid: Thursday 25 April, 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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Summit IBM machine

Where are the present computational limits of global high-resolution modelling?

Peter Bauer discusses recent ground-breaking work with a high-resolution version of the IFS running on some of the most powerful computers in the world, to see what speed-up can be achieved. He also takes a look back at early experiments from the 1980s.

8 April 2019


ECMWF Newsletter 159 cover

Spring 2019 Newsletter published

The spring 2019 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.

18 April 2019

TIGGE/S2S workshop poster session April 2019

Scientists explore use of forecast databases for weather research

Scientists from across the world flocked to ECMWF from 2 to 5 April 2019 to discuss predictability, dynamics and applications research using ensemble forecast databases for the medium and sub-seasonal to seasonal range. The Centre is currently testing new forecast products for the sub-seasonal range.

15 April 2019

Ocean with clouds and sun

Improving ocean observations for better weather forecasts

A WMO workshop in February 2019, in which ECMWF participated, examined the requirements for ocean observations, which make a critical contribution to weather forecasts and warning systems.

18 March 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.

EUMETSAT Fellows at ECMWF April 2019

Highlighted tweet

EUMETSAT Research Fellows hosted at ECMWF help to improve the use of satellite data in weather forecasting. @eumetsat @NWP_SAF @WMO


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.