My PhD project investigates how atmospheric knowledge transferred into public and private activity since the Second World War, and how public and private organisations recognised opportunities presented by stochastic weather events. Specifically, this dissertation will attempt to understand the role of weather in the optimisation of supply systems, asking how optimisation affected the capacity of these systems to accommodate or exploit exogenous factors. These supply systems include electricity, gas, water, and retail for seasonal items. Weather forecasts provide an important methodology for forecasting demand – umbrellas are bought when it is raining, lights are switched on when it is overcast, and central heating is used when it is cold. This project conceptualises the weather not as an existential threat which causes systems to fail, but as a useful resource which can be integrated into systems to make them more effective on a day-to-day basis.