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)
Data description
Data type | Gridded |
|---|---|
Projection | See details in Models' description |
Horizontal coverage | Global |
Horizontal resolution | From 0.12° to 0.9375° depending on the centre (see details in Models' description) |
Temporal coverage | From 2006 to present depending on the centre (see details in Models' description) |
Temporal resolution | 6-hourly |
File format | GRIB 2 |
Versions | For model version changes refer to Models' description and TIGGE history page |
Update frequency | Daily |
Vertical coverage | From surface to the 50 hPa (approx. 20 km) atmospheric level (see details in Models' description) |
Vertical resolution | Pressure levels - 1000, 925, 850, 700, 500, 300, 250, 200 and 50 hPa |