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The National Weather Service (NWS) keeps track of climatological data and coordinates cooperative weather observers, comprising a network of more than 10,000 National Weather Service volunteers across the U.S. who record daily weather measurements that become part of U.S. climate records. Trained volunteers called Skywarn spotters relay severe weather to their local weather service office. The NWS is charged with issuing weather forecasts, advisories, watches, and warnings on a daily basis.
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