National Weather Service United States Department of Commerce

What is the Cooperative Weather Observer Program?

Equipment Used

Data Entry

Data Quality Control Information


Community Collaborative Rain, Hail, and Snow Network -  CoCoRaHS

Is a unique, non-profit, community-based network of volunteers of all ages and backgrounds working together to measure and map precipitation (rain, hail and snow).


National Links:

The National Co-Op Program

The History of the Co-Op Program

Cooperative Observer Newsletter