pySTEPS

Dark Sky Is Dead. But What One Developer Built From Its Ashes Will Change How You Think About Weather.

When Apple killed Dark Sky, most of us settled for mediocre replacements. One developer didn’t. Strata Weather uses pySTEPS optical flow interpolation, multi-model ensemble averaging, and 14 years of historical data to build a weather tool that treats forecasts as probabilistic reality — not false certainty. It exposes how most weather apps are just wrappers around a single model’s guess.