Improving High-Impact Weather Forecasts



To accelerate improvements in 1- to 14-day high-impact weather forecasts, the World Meteorological Organization's (WMO) World Weather Research Programme established the Observing System Research and Predictability Experiment (THORPEX) Interactive Grand Global Ensemble (TIGGE) in 2005. The key objectives of TIGGE are enhancing international collaboration on ensemble prediction, determining new methods for combining ensembles from different sources, gaining a deeper understanding of forecast error and the feasibility of interactive ensemble systems, and developing a prototype for a future Global Interactive Forecasting System (GIFS).