Anders Ångström and His Early Papers on Probability Forecasting and the Use/Value of Weather Forecasts

Anders K. Angstrom was known primarily for his contributions to the field of atmospheric radiation. However, his scientific interests encompassed many diverse topics. This paper describes the contents of two early, remarkable, and, until recently, largely unknown papers by Angstrom on probability forecasting and the use/value of weather forecasts. These papers, entitled "Sannolikhet och Praktisk Vaderleksprognos" ("Probability and Practical Weather Forecasting") and "On the Effectivity of Weather Warnings," were published in 1919 and 1922, respectively.