Google has published a peer-reviewed result for its WeatherNext AI weather model, claiming state-of-the-art accuracy in predicting tropical cyclones and a lead-time gain the company describes as roughly a decade of meteorological progress compressed into a single system. The paper appeared in Nature on August 6, 2026, and Google is open-sourcing the models alongside it. The headline number is lead time. On cyclones from 2023 through 2025, WeatherNext’s track, intensity, and wind-structure…