09/28/2025
Help Track Rainfall in Indiana – Join CoCoRaHS
Amateur radio operators have long been known for service, accuracy, and community connection. That makes hams a perfect fit for CoCoRaHS (the Community Collaborative Rain, Hail, and Snow Network).
CoCoRaHS volunteers typically use a standard 4-inch diameter rain gauge, though the 8-inch diameter NWS Standard Rain Gauge (SRG) is also acceptable. Observers measure daily precipitation and submit reports online. These simple reports provide vital information for:
National Weather Service – improving flood warnings, storm reports, and the national Storm Data archive.
Emergency management – supporting disaster declarations and financial assistance after floods or droughts.
State soil and water groups – guiding drought monitoring and U.S. Drought Monitor maps.
Farmers, researchers, and local communities – for water management, crop planning, and climate studies.
Why hams are a great fit: Many radio operators already support Skywarn or emergency communications, making careful, consistent observations part of their skill set. Just as importantly, hams are community-minded — often able to reach neighbors and networks that typical recruitment efforts can’t. By joining CoCoRaHS and sharing the opportunity, you can multiply the impact of this citizen-science network.
It usually takes only a few minutes a day, but your observations — and your outreach — can make a big difference. Learn more or sign up at www.cocorahs.org. Follow the Indiana CoCoRaHS effort on the CoCoRaHS Indiana page (https://www.facebook.com/CocorahsIN/).
-----------------
Help Track Rainfall in Indiana – Join CoCoRaHS
Amateur radio operators are known for public service, accuracy, and community connection — making them a perfect fit for CoCoRaHS (the Community Collaborative Rain, Hail, and Snow Network). Volunteers typically use a standard 4-inch diameter rain gauge, though the 8-inch diameter NWS Standard Rain Gauge (SRG) is also acceptable, to measure daily precipitation and submit reports online. These simple reports are vital for the National Weather Service (flood warnings, storm reports, and Storm Data), emergency management (disaster declarations and financial assistance), state drought and soil groups (U.S. Drought Monitor input), and farmers and communities (water management and crop planning). Many hams already participate in Skywarn or emergency communications, and CoCoRaHS offers another way to serve — while also helping spread the word to neighbors and networks that typical recruitment messages might miss. It usually takes only a few minutes a day. Learn more at www.cocorahs.org and follow us on the CoCoRaHS Indiana page (https://www.facebook.com/CocorahsIN/).
-----------------
Join CoCoRaHS – Help Track Indiana’s Rainfall
Amateur radio operators make excellent CoCoRaHS volunteers, measuring daily rain, hail, and snow with a 4-inch gauge (or 8-inch NWS SRG) and reporting online. The data is used by the National Weather Service, emergency management, state drought groups, farmers, and communities for flood warnings, disaster aid, drought monitoring, and crop planning. Hams already serve their communities through Skywarn and emergency communications — CoCoRaHS is another way to make a difference. It usually takes just a few minutes a day. Learn more at www.cocorahs.org.
COCORAHS CELEBRATED 25 YEARS IN 2023CoCoRaHS officially began on June 17, 1998. With a few observers along Colorado's Front Range, we had no idea that the network would become what it is today, with over 27,000 active observers in the United States, Canada, Puerto Rico, the U.S. Virgin Islands,...
