The National Weather Service

The program is called CoCoRaHS, which stands for the Community Collaborative Rain, Hail & Snow network.

The network originated with the Colorado Climate Center at Colorado State University in 1998 thanks in part to a devastating flood that occurred in the previous year. Since then, the network has expanded rapidly with over 6,500+ observers in 26 states.

For more information visit crh.noaa.gov/lot/.