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Photo: CoCoRaHS
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Updated 12/02/2016
Participation fee $0
Expenses $35
Spend the time outdoors
Location Canada
Puerto Rico, United States of America
The Bahamas
United States of America
United States Virgin Islands, United States of America
Appropriate for kids yes
Teaching materials yes


Required Gear:

Manual Rain Gauge

CoCoRaHS: Rain, Hail, Snow Network


Provide weather data to meteorologists
Measure rain, hail, and snow

Project locations:

  • Canada
  • Puerto Rico, United States of America
  • The Bahamas
  • United States of America
  • United States Virgin Islands, United States of America

CoCoRaHS, The Community Collaborative Rain, Hail, and Snow Network is a unique, non-profit, community-based network of volunteers of all ages who measure and report precipitation. By using low-cost measurement tools, stressing training and education, and utilizing an interactive website, our aim is to provide the highest quality data for natural resource, education and research applications.

Each time a rain, hail, or snow storm occurs, volunteers take measurements of precipitation from their registered locations (reports of 'zero' precipitation are encouraged too!). The reports are submitted to the website and are immediately available for viewing. It's educational, but moreover, fun! Just wait until you start comparing how much rain fell in your backyard vs. your neighbor!

The data are used by the National Weather Service, meteorologists, hydrologists, emergency managers, city utilities, insurance adjusters, the U.S. Department of Agriculture, engineers, mosquito control, ranchers and farmers, outdoor and recreation interests, teachers, students, and neighbors in the community.




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