The Challenge
Global models can't see cities
State-of-the-art AI weather models like GraphCast produce forecasts at ~25 km resolution — enough to track synoptic weather systems, but far too coarse for urban decision-making.
Delhi NCT is just 1,484 km². At 25 km resolution, the entire megacity fits inside 3 grid cells.
AirCast Delhi bridges this gap by downscaling GraphCast predictions to 1 km resolution using a 3D UNet with Latent Consistency Model (LCM) diffusion — revealing neighborhood-scale temperature gradients, urban heat islands, and local circulation patterns invisible to global models.
Input ~25 km
Output 1 km
