Advancing global NWP through international collaboration

High resolution mean sea level pressure and ensemble spread

Tuesday 19 June, 12 UTC T+96 Valid: Saturday 23 June, 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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Extra weather station data improve ECMWF’s forecasts

Accurate and timely weather data from across the globe are crucial for numerical weather prediction. In a welcome development, Ukraine has recently begun to provide additional weather station observations to ECMWF in real time.

18 June 2018

Game-changing Climate Data Store launched

Europe’s Climate Data Store (CDS), launched today, is a one-stop-shop for past, present and future climate information. The CDS greatly improves access to climate data and tools, is open and free for all to use, and will change the ways in which society can benefit from Earth observations and climate science.

14 June 2018

Rainfall percentiles derived from ecPoint-Rainfall

Diverse project work in focus

Articles in this section present ECMWF’s involvement in diverse areas, including work to monitor the composition of our atmosphere and human CO2 emissions, initiatives to reduce exposure to weather-related disasters, and research into improving energy-efficiency in NWP models.

11 June 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.

Extra weather station data from Ukraine (red dots in the map show the new locations)

Plot of the week

High-quality weather observations are vital to help initialise forecasts. Earlier this week ECMWF started to assimilate extra weather station data from Ukraine (red dots in the map show the new locations). Watch out for the full story on ECMWF's website on 18 June.


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.