What's the Weather in Your Backyard?
When you hear the rainfall amount from the official gage, have you ever
"That's not what I got!"
CoCoRaHS is an acronym that stands for Community Collaborative Rain, Hail, and Snow network.
CoCoRaHS is a non-profit, community-based network of volunteers of all ages and backgrounds working
together to measure and report precipitation data. The program started in Colorado in 1998 and is
now active in almost all 50 states across the country. Data collected through CoCoRaHS helps
meteorologists, researchers, media outlets, and others observe and study the variability of
precipitation across the western Carolinas and northeast Georgia. The accumulated precipitation data
is available to anyone through the internet.
There are over 350 CoCoRaHS observers in the Greenville-Spartanburg, SC (GSP) county warning
area. The map below shows the locations of these observers across Western North Carolina, Upstate
South Carolina, and Northeast Georgia. Click on the map for a larger version.
CoCoRaHS data are used in several important ways. In addtion to reporting daily precipitation,
observers are also encouraged to report hail and intense precipitation. CoCoRaHS hail reports have
been used numerous times to verify severe thunderstorm warnings and intense precipitation reports
have alerted forecasters to heavy rainfall, prompting the issuance of flood/flash flood warnings.
Also, daily CoCoRaHS precipitation data is gathered and issued in a text format for Western North
Carolina, Upstate South Carolina, and Northeast Georgia. Click HERE
to see the latest CoCoRaHS precipitation reports from the western Carolinas and northeast
CoCoRaHS data are also collected and analyzed to create event snowfall/rainfall accumulation
maps. One example is from the snowstorm that occurred on March 1st-2nd, 2009. Also, GSP is now creating monthly rainfall maps that are
based on CoCoRaHS, Coop, and ASOS data for the entire month. These maps are available here. The main thing to remember is
that CoCoRaHS data are used on a consistent basis by the National Weather Service in a multitude of
Becoming part of the CoCoRaHS program is quite easy. Simply go to the program's web site,
and click on the "Join CoCoRaHS" link in the upper right-hand portion of the web page.
After entering all the necessary information, purchase one of the 4" rain gages that is
standard to the program and you are ready to go.
For more information, use the contact information provided below.
Western Region Coordinator: Jeff Taylor
Upstate Region Co-coordinators: Jeff Taylor, Pat Tanner
Email: email@example.com, firstname.lastname@example.org
Region 1 Coordinator: Pam Knox
Email: email@example.com or firstname.lastname@example.org
Thank you for your interest in CoCoRaHS -
Because Every Drop Counts!