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🌧️ Rain Gauge Rally Month is Here! (April 1–30)

April is Rain Gauge Rally Month—a time when CoCoRaHS focuses on growing our network of volunteer weather observers across the country, including right here in Indiana.

While the Rally includes a friendly competition between states, our real goal is closer to home:
👉 We need more observers in underrepresented communities.

Many Indiana counties currently have 5 or fewer active observers, and our goal is at least 10 observers per county to ensure accurate, localized precipitation data.

Why Become a CoCoRaHS Observer?

• Make a real impact — Your reports are used by meteorologists, emergency managers, researchers, educators, media, water resource managers, transportation officials, and so many more
• Flexible for individuals and organizations — Observe from your home, school, business, farm, or public facility
• Support better forecasts & warnings — Especially for heavy rain, flooding, and winter weather
• Learn more about weather — Gain hands-on experience and deepen your understanding
• Join a nationwide community of weather enthusiasts and citizen scientists

Why Your Observations Matter

• Fill critical gaps between official weather stations
• Improve flood monitoring and drought tracking
• Provide ground truth for radar estimates
• Support agriculture, water management, emergency planning, and public safety

Becoming a CoCoRaHS observer is free, easy, and open to all ages.

Learn More Sign Up for Free

📍 Help Us Reach Every County: If you live or work in a rural or underserved area, your participation is especially valuable. Even a single new observer can make a big difference in data coverage.

Are you a CoCoRaHS observer? Please keep us up to date with changes to your physical address, e-mail address, and telephone number. This information allows us to properly catalog your station location, reach out to you for data concerns, give you our national and state newsletters, and other correspondence.

E-mail addresses are stored in two databases, one at CoCoRaHS headquarters (HQ) and one at the Indiana State Climate Office (INSCO). To update the HQ database, including for phone number changes, log into your account at cocorahs.org, click on "my account" (top of page), and then click on "edit" next to "my information" to make changes yourself. To update the INSCO database, contact Beth Hall via the contact information on our full coordinator listing page. If you need to update your physical address please contact HQ at info@cocorahs.org or call the help desk at (970) 491-8545.

If you are a county coordinator who needs updates to this webpage and/or our full coordinator listing page, or you want to become a coordinator, please contact Beth Hall or Andrew White via their contact info on the full coordinator listing page.

Does your business or organization use CoCoRaHS data?
If so, then we'd like to hear about it!  It may be a usage of the data that we were unaware of, and we are always interested in discovering additional ways this wonderful data source is being utilized.  Please contact: Beth Hall at the Indiana State Climate Office.


Want to learn more about CoCoRaHS?
YouTube webinar (recorded in mid-April 2020)

Indiana Training Webinar (held May 7, 2020)

Indiana Winter Training (Nov 6, 2020)

Upcoming Training Sessions

The National Weather Service in Duluth offered free online training for CoCoRaHS and COOP observers on measuring and reporting winter precipitation in late 2025, and one of the webinars was recorded.  🎥 Watch the recording here:  https://www.youtube.com/watch?v=OidHw4t9cOs

All new observers must have some form of training, either from a live walk-in training session with a county coordinator or from the online training.

All observers must use one of the following rain gauges: 4" diameter standard CoCoRaHS gauge (aka Stratus gauge), 4" diameter TROPO gauge, or the 8" diameter National Weather Service Standard Rain Gauge for reports. For more information please see the Approved Rain Gauges page.

ONLINE TRAINING IS AVAILABLE AT THIS LINK:
CoCoRaHS Training Videos
CoCoRaHS Animation Shorts

If a scheduled session won't work for you, walk-in trainings are available.
Contact the coordinator listed for more information!

Please see the State Coordinators list (a link is also near the top of the left-hand menu) for a complete list of Indiana Coordinators.

CoCoRaHS In Indiana is made possible by:

The Indiana State Climate Office 

National Weather Service - Indianapolis

Your Indiana Coordinators:

Andrew White and Brad Herold, National Weather Service, Indianapolis

Kyle Brown, National Weather Service, Northern Indiana

Beth Hall, Indiana State Climate Office