Join the CoCoRaHS Precipitation Network during March Madness!

Do you like to watch the weather? Join the CoCoRaHS precipitation observing team! 

Be a part of "March Madness", when states compete to have the most new observers join the CoCoRaHS network during the month of March. Click the banner below to see the latest March Madness news from CoCoRaHS, including the number of new observers per state.

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

You can also contact your county CoCoRaHS coordinatorSouth Dakota CoCoRaHS coordinators, Wyoming CoCoRaHS coordinators 

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