CoCoRaHS volunteers record and report weather observations on a daily basis. They observe daily precipitation totals, snowfall totals, and snow depth. Their measurements summarize 24-hour periods ending at an observation time convenient for the volunteer, most often 7:00 AM or 8:00 AM. The data are used to support National Weather Service weather and hydrological forecasts and warnings, and to build the nation's climate record.
The map at left depicts CoCoRaHS monitoring locations that were active within the past two years. Clicking on a station marker will provide information about the station's history and permits users to retrieve climate data for the station's full period of record.
More full-featured tools for retrieving these data are available from CoCoRaHS, the Midwestern Regional Climate Center, and National Weather Service NOWData.