CoCoRaHS is the Community Collaborative Rain, Hail, & Snow Network, a group of over 10,000 volunteer precipitation observers nationwide. CoCoRaHS observers measure the precipitation (rain, hail, and snow) that falls at their location, and share the data online.
Reports from CoCoRaHS observers are used by many organizations at the local, state and national level, including the National Weather Service. By volunteering as an observer you become a citizen scientist, and play an important role in documenting how the weather affects your community.
All you need to become an observer for CoCoRaHS is a standard 4 inch diameter rain gauge (shown in the photos above, available for purchase on the CoCoRaHS website), and access to the internet to relay reports via the CoCoRaHS app or website.
You can report daily, during the rain or snow season, or whenever you are able to take measurements. It's up to you! Any reports you can share are greatly appreciated.
We are especially in need of precipitation and snowfall reports from across Middle Tennessee.
The nationwide volunteer Community Collaborative Rain, Hail, & Snow Network (CoCoRaHS) is a grass-roots effort to provide precipitation reports in as many locations as possible across the country. As the saying goes "the rain doesn't fall the same on all". Due to the variability of precipitation, amounts can be quite different only a block or two away. Help fill in the gaps! The more observations, the better the understanding of the weather conditions that impact the area.
The National Weather Service uses CoCoRaHS precipitation data daily in river forecast models, flood and drought forecasts, and precipitation and snowfall maps and tables. Here's a link to where CoCoRaHS data are posted on our website: https://www.weather.gov/ohx/middletngraphicaldailyclimate
CoCoRaHS observers can also send the National Weather Service real-time reports of severe weather including hail, flooding, blizzards, ice storms, wind damage, and excessive rainfall totals, which greatly assist meteorologists with determing the impact of storms on local communities. Your reports will make a difference!
"Because Every Drop Counts"
What is CoCoRaHS?
https://www.youtube.com/watch?v=M5-sXXg9M30
For additional information, to view data from CoCoRaHS observers across the country, or to join the network please visit the CoCoRaHS website at: https://www.cocorahs.org
For additional information please contact Mike Davis, Acting Observing Program Leader at the National Weather Service in Nashville, Tennessee for more information at 615-754-8500 or michael.davis@noaa.gov