📊Today marks 30 years since we first produced ensembles at ECMWF. Now, they are at the core of medium, extended (monthly) & long (seasonal) range forecasts, providing a range of possible outcomes & the likelihood of weather events. ➡️ https://t.co/j4YNPg2Irx#30YearsOfENS 🧵 pic.twitter.com/0qWC6ES3uJ

— ECMWF (@ECMWF) November 24, 2022