CoCoRaHS - The Community Collaborative Rain, Hail, and Snow Network

CoCoRaHS Logo

Become a Weather Observer for Your Community!

CoCoRaHS is is the Community Collaborative Rain, Hail, & Snow Network, a group of over 18,000 volunteer precipitation observers nationwide.  CoCoRaHS observers measure the rain, hail, and snow that falls in their backyard, and share the data online. 

Reports from CoCoRaHS observers are used by many agencies at the local, state and national level, including the National Weather Service.  It's a unique opportunity to become a "citizen scientist" and play an important part in documenting how weather affects your local community.  The data are used by forecasters, researchers, drought assessors, and others.

All you need to join CoCoRaHS is a standard 4 inch diameter rain gauge which meets National Weather Service standards of accuracy to the hundredth of an inch, and access to the internet to relay reports through the CoCoRaHS website.  You can report daily, all year, during the summer Monsoon, or whenever you are able to take measurements. It's up to you!  Any reports you are able to share are greatly appreciated.

Getting Started with CoCoRaHS

CoCoRaHS Introduction Video
Application Form
There are several options for obtaining a rain gauge. For more information, go to or contact a coordinator (see "Contact Information" below).
CoCoRaHS Training Video - NWS El Paso (English)

These printable "Cheat Sheets" may help you out after training:

Contact Information - Questions

If you have any questions about joining CoCoRaHS, how to properly site a rain gauge, how to measure precipitation, please contact one of our State or Regional Coordinators:

New Mexico State Coordinator - David DuBois
Texas State Coordinator - Bill Runyon

Regional Coordinator (SW New Mexico and Far West Texas) - Mike Hardiman

Dona Ana County Local Coordinator - Sylvia Hacker
Luna County Local Coordinator - Alberta Morgan

This page was last updated 03/06/2015. is the U.S government's official web portal to all federal, state and local government web resources and services.