National Weather Service United States Department of Commerce

 


Commumity Collaborative Rain, Hail and Snow Network
 

CoCoRaHS
  

"Because every drop counts"

 

 

The National Weather Service in Charleston, SC currently has over 200 active CoCoRaHS observers! As you can see from the map below, we are in need of observers in several counties, particularly across southeast Georgia. Sign up to become a volunteer weather observer here: Join CoCoRaHS! If you have any questions about the program, contact Emily McGraw or Julie Packett

cocorahs

 

What is CoCoRaHS?

CoCoRaHS (Community Collaborative Rain, Hail and Snow Network) is a non-profit, community-based network of volunteers of all ages and backgrounds working together to measure and map precipitation. The network originated with the Colorado Climate Center at Colorado State University in 1998, thanks in part to the Fort Collins flood a year prior. For a quick overview of the program, check out this short introduction video.

Volunteers take daily rain, snow, and hail measurements in their backyard and then report the observation online. As of 2019, CoCoRaHS is in all fifty states and has grown to over 20,000 active volunteers. 

 

Who Can Participate?

This is a community project. Everyone can help - young, old, and in-between.  The only requirements are an enthusiasm for watching and reporting weather conditions and a desire to learn more about how weather can affect and impact our lives. 

Public, private and home schools are also joining! Learn about the "CoCoRaHS for Schools" program. 

 

How Do I Become an Observer?

 

Who Uses CoCoRaHS Data?

CoCoRaHS data is used by a wide variety of organizations and individuals.  The National Weather Service, other meteorologists, hydrologists, emergency managers, city utilities (water supply, water conservation, storm water), insurance adjusters, USDA, engineers, mosquito control, ranchers and farmers, outdoor & recreation interests, teachers, students, and neighbors in the community are just some examples.

 

Why Participate?

One of the neat things about participating in this network is coming away with the feeling that you have made an important contribution that helps others.  By providing your daily observation, you help to fill in a piece of the weather puzzle that affects many across your area in one way or another. The more observations, the better as amounts can vary significantly over small distances. An added bonus - your observations get archived in the official climate record

 

Local Observer Highlight

 

"I've been an amateur scientist and an observer of nature since I was a child. I really appreciate the opportunity to contribute my observations to the CoCoRaHS network."

 

-Howard, Station SC-CL-20

Observer since March 2018

 

Resources

Daily Maps

Training Guide

FAQ / Help