Contribute Your Weather Observations

The Citizen Weather Observer Program (CWOP) is a public-private partnership with three goals:

  • to collect weather data contributed by citizens
  • to make these data available for weather services
  • to provide feedback to data contributors so they can check and improve their data quality.

In fact, the web address,, stands for weather quality assurance!

Your contributions of data via CWOP will improve forecasting in your area. Visit the CWOP Signup Page for more information.

Note: Be sure your weather instruments meet specifications. See How to Position Your Weather Monitor for instructions.