page_title: Citizen Weather Observer Program
hierarchical_section_title: Citizen Weather Observer Program
caption_attribution_description: English: Citizen Weather Observer Program station EW0093 in Elko, Nevada. The mast supports a wind vane and anemometer, while the rain gauge and other sensors are installed near ground level.
context_page_description: The Citizen Weather Observer Program is a network of privately owned electronic weather stations concentrated in the United States but also located in over 150 countries. Network participation allows volunteers with computerized weather stations to send automated surface weather observations to the National Weather Service by way of the Meteorological Assimilation Data Ingest System. This data is then used by the Rapid Refresh forecast model to produce short term forecasts of conditions across the contiguous United States. Observations are also redistributed to the public.
context_section_description: The Citizen Weather Observer Program (CWOP) is a network of privately owned electronic weather stations concentrated in the United States but also located in over 150 countries. Network participation allows volunteers with computerized weather stations to send automated surface weather observations to the National Weather Service (NWS) by way of the Meteorological Assimilation Data Ingest System (MADIS). This data is then used by the Rapid Refresh (RAP) forecast model to produce short term forecasts (3 to 12 hours into the future) of conditions across the contiguous United States. Observations are also redistributed to the public.
caption: A CWOP home weather station.  The mast supports a wind vane and anemometer, while the rain gauge and other sensors are installed near ground level.
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