Welcome to CoCoRaHS!   "Volunteers working together to measure precipitation across the nations."

Reports received today 7/19/2019 as of 10:53 AM EDT
Daily Multi-day SigWx Hail Condition ET
7,472 88 1 0 19 113

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CoCoRaHS 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 20,000 active observers in the United States, Canada, Puerto Rico, the U.S. Virgin Islands and the Bahamas. A truly remarkable effort by all of you.  Please join us as we celebrate twenty years.  Here's to many more on the horizon. To read about the past 20 years of CoCoRaHS by clicking here: History

The saying "Rain doesn’t fall the same on all" really proves to be true. How often have you seen it rain in your neighborhood and a few blocks away not a drop has fallen.

If you get the chance, please take a moment to tell a friend or neighbor about this exciting grassroots effort of citizens measuring precipitation right in their own backyards.  It's easy to join, takes only five minutes a day and is a fun way to learn about this wonderful natural resource that falls from the sky.  Your observations continue to give scientists an ever clearer picture of where and how much precipitation falls throughout our communities.

CoCoRaHS (pronounced KO-ko-rozz) is a grassroots volunteer network of backyard weather observers of all ages and backgrounds working together to measure and map precipitation (rain, hail and snow) in their local communities. By using low-cost measurement tools, stressing training and education, and utilizing an interactive Web-site, our aim is to provide the highest quality data for natural resource, education and research applications. The only requirements to join are an enthusiasm for watching and reporting weather conditions and a desire to learn more about how weather can affect and impact our lives.

Our Web page provides the ability for our observers to see their observations mapped out in "real time", as well as providing a wealth of information for our data users.

For more information, please click here: Information about CoCoRaHS

If you would like to sign-up as a volunteer observer and become part of our expanding network, please click here: "Join the CoCoRaHS Network".

Complimentary training is provided to help you become an effective weather observer.  Please check out your state page above (by clicking on your state) for a list of current training sessions in your local area.  If none are taking place at the current time, watch our YouTube animations or Training Slide Shows and read our on-line training information.

CoCoRaHS values the diverse group of individuals that make up our volunteer network. As CoCoRaHS Headquarters is based in the United States, we value everyone’s right to free speech. However, we have zero tolerance for hate speech, bullying, or discrimination/harassment against another individual on the basis of race, religion, gender, gender identity, sexual orientation, age, or disability.
The personal views expressed by any individual who is a CoCoRaHS volunteer are their own views and may not reflect the values of CoCoRaHS Headquarters. Being a CoCoRaHS volunteer does not imply endorsement by CoCoRaHS of any statements made by the volunteer.
Those individuals who publicly advertise or broadcast an affiliation with CoCoRaHS must be held to a higher standard. Therefore, any comments made (via speech, written, or on social media) that do not align with our value statement will require action, including and up to termination from the CoCoRaHS network.

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National Hydrologic Warning Council Wyoming State Climate Office Colorado State University logo
Issue Tracking by Countersoft Gemini            Community Support by Countersoft Atlas               

Click here to sign-up to become a weather observer with the CoCoRaHS Network


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Click here to view the article in Weatherwise magazine

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