CoCoRaHS Information

Volunteer to Measure Rainfall!

Join CoCoRaHS - A Nationwide Precipitation Network!

If you have an interest in the weather, please consider joining CoCoRaHS, a citizen science volunteer nationwide precipitation network.

As part of the network, you will report rainfall each day. You may also measure snow and even hail. Your precipitation observations contribute to CoCoRaHS, the Community Collaborative Rain, Hail and Snow Network as well as the National Weather Service.

No experience is necessary. All ages are welcome. By participating, you will play an active role in meteorological reporting and research using inexpensive equipment (a rain gauge) in your backyard. You will report your observation each morning through the CoCoRaHS web page.

Click here to visit the CoCoRaHS web site for more information.

The only equipment needed is a 4" cylindrical rain gauge. In order for reports to be consistent, the use of the 4" rain gauge is mandatory. A gauge can be purchased for about $30 (plus shipping) through the web site. A yardstick or ruler should be used to measure snow depth.

There is a short training video which you will do on-line through the CoCoRaHS web site - www.cocorahs.org. If you have questions, you can email your regional coordinator. Your observations are displayed in tables and maps for all to view online. Your specific location information is always kept private.