Advancing global NWP through international collaboration

High resolution mean sea level pressure and ensemble spread

Friday 18 September, 00 UTC T+96 Valid: Tuesday 22 September, 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..

View all charts
SCIENCE BLOG
NEWS
NEWS

Copernicus CO2 satellite image

ECMWF-led CO2 monitoring project on track for 2023 prototype

A European project to build a monitoring and verification support capability for global emissions of carbon dioxide (CO2) related to human activities is on track to deliver a prototype system by 2023, ECMWF’s project coordinator says.

7 September 2020
IN FOCUS

Earth observation system

Fact sheet: Earth system data assimilation

The quality of weather forecasts crucially depends on our ability to accurately estimate the current state of the Earth system. This Q&A explains how Earth system data assimilation enables us to make such estimates.

 

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.

IFS 47r1 upgrade image for documentation

Highlighted tweet

Full documentation is now available for Cycle 47r1 of ECMWF’s Integrated Forecasting System (IFS), which became operational in July this year. IFS documentation #IFS47r1

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.

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.