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Google Launches WeatherNext 3 AI Model with 5 km Resolution and 15-Day Forecasts

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Google has released WeatherNext 3, an upgraded AI-based global weather forecasting model offering hourly forecasts up to 15 days ahead. The model achieves a spatial resolution of up to 0.05 degrees (roughly 5 km) for station-calibrated surface variables, representing a 2.5x to 5x improvement over its predecessor, WeatherNext 2. It generates 64-member probabilistic ensembles to help quantify forecast uncertainty, which is valuable for operational planning in logistics, energy, and outdoor industries. Google also reports up to 50% improvement in precipitation forecast accuracy, attributed to training on multiple data sources including ECMWF reanalysis and NASA IMERG. The model additionally outputs renewable-energy-relevant variables such as 100-metre wind speeds, cloud cover, and surface solar radiation.

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Google Launches WeatherNext 3 AI Model with 5 km Resolution and 15-Day Forecasts · ShortSingh