Name: TIGGE global medium-range ensemble forecasts from multiple NWP centres since 2006
Creator: ECMWF
Published: 2026-04-01T00:00:00Z
License: https://object-store.os-api.cci2.ecmwf.int:443/cci2-prod-catalogue/licences/tigge-licence/tigge-licence_5a08d5ef121b263c870e46ddd923398f3f586bb696e866efb9da5bda97ae3e35.pdf

The International Grand Global Ensemble (TIGGE) dataset consists of global medium-range ensemble forecasts from thirteen numerical weather prediction (NWP) centres. 
The dataset has been available since October 2006. TIGGE was established as a key component of THORPEX: a World Weather Research Programme to accelerate the improvements in the accuracy of 1-day to 2 week high-impact weather forecasts (THORPEX stands for THe Observing system Research and Predictability EXperiment)
The typical forecast length is from 10 to 15 days with ensemble sizes varying from 12 to 51. Some centres also provide complementary high-resolution forecasts. TIGGE variables are available on surface, soil, potential temperature, potential vorticity and selected pressure levels.
Although the original ten-year THORPEX program ended at the end of 2014, data archiving continues and is currently undergoing another five-year phase (2024–2028).
Please consult the Documentation section for details, including data sources, model configurations and limitations.
The data discovery and sample downloads can be done either via ECDS forms (under Download tab) or alternatively via dedicated MARS TIGGE catalogue (MARS stands for ECMWF's Meteorological Archival and Retrieval System).
(TIGGE picture used - courtesy of Mio Matsueda, TIGGE Museum)

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TIGGE global medium-range ensemble forecasts from multiple NWP centres since 2006

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