Many people rely on pollen forecasts to know when their allergies are likely to cause trouble. So when the main source of them in Finland scaled back after losing funding, a replacement was needed. Hear about the process of starting at zero knowledge of pollen forecasting, discovering the available models and data, and putting it together to get 3-day forecasts for any location in Europe, as a hobbyist with some help from the Finnish Meteorological Institute. Includes learning about atmospheric science, academic data, coordinate projections, Rust and more.