A deep dive into WeatherNext 3, Google DeepMind and Google Research's third-generation global weather AI model. We cover the business context (why a forecast that only updates every six hours is a real operational cost for renewable energy, agriculture, aviation, and emergency response), the technical approach (a single Functional Generative Network mesh-transformer that ingests live geostationary satellite imagery to refresh its forecast every hour instead of every six, at roughly five times the resolution of its predecessor), and what the reported accuracy gains — up to 60% better precipitation forecasts against satellite benchmarks — actually mean in practice, plus where the write-up leaves real questions open. Source article: "Introducing WeatherNext 3, Our Most Advanced and Accurate Global Weather AI Model" — Google (DeepMind / Google Research) ...