To: Wharf Rat  who wrote (25904 ) 10/23/2025 6:39:18 PM From: Don Green  Respond to    Thoughts for Grok Ai GraphCast by Google DeepMind: Released in 2023, this model uses graph neural networks to predict global weather up to 10 days ahead. It outperforms traditional models like ECMWF’s HRES in 90% of tested variables, running on standard hardware rather than supercomputers.  Pangu-Weather by Huawei: A 2023 model that employs 3D Earth-specific transformers for high-resolution forecasts. It’s particularly strong in predicting extreme events like typhoons, achieving better results than conventional methods in some cases.  FourCastNet by NVIDIA: Focuses on ensemble forecasting, generating multiple possible outcomes quickly to account for uncertainty. It’s used for short-term predictions and has been integrated into operational systems.  AIFS (Artificial Intelligence/Integrated Forecasting System) by ECMWF: Launched in 2024, this combines AI with traditional models for medium-range forecasts, improving efficiency and reducing energy consumption.    These AI systems excel in medium-range forecasting (3-10 days) and are being tested for nowcasting (immediate short-term predictions) and long-term climate projections. Benefits include lower computational costs, better handling of big data from satellites and sensors, and potential for real-time updates. Challenges remain, such as ensuring “trustworthiness”—avoiding hallucinations (false predictions), incorporating physical constraints, and handling rare events where training data is sparse. Organizations like the World Meteorological Organization (WMO) and NOAA are increasingly adopting AI, with pilot programs showing up to 20-30% improvements in forecast accuracy for precipitation and temperature.