User profiles, trip reports, and inspection reports are now live! The remaining features are in the final development stage. Stay tuned!

Welcome to WxCoder – the official web-based entry system for the National Weather Service (NWS) Cooperative Observer Program (COOP)! Combined with IV-ROCS, the telephone entry system, WxCoder provides the means for daily entry of weather measurements by COOP volunteers. WxCoder also logs measurements from data loggers that are part of an experimental network called Cellular COOP (CCOOP). WxCoder is sponsored by the National Oceanic and Atmospheric Administration (NOAA) through the NWS, the Regional Climate Center (RCC) Program, and the National Centers for Environmental Information (NCEI, formerly the National Climatic Data Center, or NCDC).

COOP consists of thousands of dedicated volunteers who take observations at farms, urban and suburban areas, National Parks, seashores, and mountaintops. The input data are truly representative of where people live, work, and play. Since 1890, COOP has fulfilled key mission elements:

• To provide observational meteorological data, usually consisting of daily maximum and minimum temperatures, snowfall, and 24-hour precipitation totals, required to define the climate of the United States and to help measure long-term climate changes
• To provide observational meteorological data in near real-time to support forecast, warning and other public service programs of the NWS

If you are a COOP observer, log in to report your daily observations.