= Significant Weather Observing Program
{wiki=Significant_Weather_Observing_Program}
The Significant Weather Observing Program (SWOP) is a program established by the National Weather Service (NWS) in the United States to enhance weather observation efforts, particularly in identifying and reporting significant weather events. The program focuses on encouraging volunteers, such as trained weather observers or spotters, to report severe weather phenomena, including heavy precipitation, severe thunderstorms, tornadoes, and other notable atmospheric conditions.
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