Google's DeepMind has developed an AI machine-learning model called GraphCast that provides more accurate weather forecasts than conventional numerical weather prediction methods. Using historical weather data and AI analysis, GraphCast produces predictions in seconds, surpassing the slower hours-long process of traditional forecasting. DeepMind's GraphCast shows promise in predicting severe weather, and Google continues to enhance its weather forecasting approach, including leveraging data from external sources like the National Oceanic and Atmospheric Administration.