 Citizen Weather Observer Program

The Citizen Weather Observer Program (CWOP) is a voluntary network of amateur weather stations operated by individuals, hobbyists, and organizations. Launched in the late 1990s, CWOP collects and shares weather data from citizen observers to enhance meteorological research and weather forecasting. Participants in the program typically use personal weather stations to measure various weather parameters, including temperature, humidity, wind speed and direction, rainfall, and barometric pressure.