What is CoCoRaHS?
Community Collaborative Rain, Hail, & Snow (CoCoRaHS) is a nationwide volunteer reporting network that provides precipitation measurements for natural resource, education and research applications. The National Weather Service uses CoCoRaHS precipitation data daily in river forecast models, flood and drought forecasts, and precipitation and snowfall maps and tables.
CoCoRaHS allows observers to share their precipitation measurements via the Internet which can be used by agencies who need accurate, real-time precipitation data for various purposes. The only equipment needed to join CoCoRaHS is a standard 4" diameter plastic rain gage and access to the Internet to enter reports. Observers can report precipitation daily or only on days when they are able to take measurements. CoCoRaHS observers can also send real-time severe weather reports to the National Weather Service; including hail size, flooding, storm damage, and excessive rainfall, which greatly assist meteorologists in determing the impact of storms on local communities.
For additional information on the CoCoRaHS program, to view CoCoRaHS data, or to join CoCoRaHS team, visit the CoCoRaHS web site at http://www.cocorahs.org