Demystifying Data-Driven Probabilistic Medium-Range Weather Forecasting. - Jean Kossaifi; Nikola B. Kovachki; Morteza Mardani; Daniel V. Leibovici; Suman Ravuri; Ira Shokar; Edoardo Calvello; Mohammad Shoaib Abbas; Peter Harrington; Ashay Subramaniam; Noah D. Brenowitz; Boris Bonev; et al. (CoRR, 2026)