The Community Collaborative Rain, Hail and Snow Network (CoCoRaHS) is a non-profit organization that gathers and disseminates precipitation data from volunteer weather observers across the United States. It was founded in 1998 and is based in Fort Collins, Colorado. The organization's mission is to provide "high-quality, low-cost precipitation data" to support water resource management and weather forecasting.
CoCoRaHS is a volunteer network of weather observers who measure and report daily precipitation data, as well as measuring the depth of snow on the ground. The data they collect is used by a variety of organizations including National Weather Service, state climatologist offices, county emergency managers, and local water resource managers.
The organization provides training and support to volunteer weather observers and makes their data available to the public through their website, making it accessible to researchers, meteorologists, educators, and others who can use it for various purposes. The data is also used for a variety of water management, research, and education purposes, such as studying climate change and drought, forecasting flash floods and drought, and educating the public about the importance of precipitation and water resources.
CoCoRaHS is unique in its data collection approach, as it is a community-based network that relies on volunteer weather observers to provide precipitation data, which is often more detailed and more geographically specific than data collected by other weather monitoring networks. The organization's data is considered of high quality as it is collected and reported by trained volunteers who are dedicated to providing accurate data.
CoCoRaHS is widely recognized as an important tool for monitoring precipitation and understanding its impact on water resources. The network provides a valuable service to the community by providing accurate and locally-sourced precipitation data that can be used by a variety of organizations and individuals, including researchers, meteorologists, water managers, and the general public. Additionally, the organization's educational and outreach efforts help raise awareness of the importance of understanding precipitation patterns and their impact on water resources, making it an important community resource for water management, education and research.