U-Cast: A Surprisingly Simple and Efficient Frontier Probabilistic AI Weather Forecaster

ArXi:2604.09041v1 Announce Type: cross AI-based weather forecasting now rivals traditional physics-based ensembles, but state-of-the-art (SOTA) models rely on specialized architectures and massive computational budgets, creating a high barrier to entry. We nstrate that such complexity is unnecessary for frontier performance. We