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- A significant weather advisory was a hazardous weather statement issued by certain Weather Forecast Offices (WFO) of the National Weather Service (NWS) in the United States to alert the public of thunderstorm activity that is below designated severe criteria for and/or is not expected to produce severe weather. The title assigned to the advisory—alternately titled "significant weather alert" or referenced by its originating product, "special weather statement"—varied by the issuing WFO. Created in April 2002 as an unofficial special weather statement sub-product, the advisory was issued when trained storm spotters or Doppler weather radar indicate that a sub-severe thunderstorm is producing or will soon produce hail or strong winds below NWS-determined severe weather warning criteria. Should conditions favor intensification or severe weather approach the alerted area, a warning may be required. While intense lightning or rainfall caused by the thunderstorm did not merit an advisory on its own, the product may also have mentioned the occurrence or likelihood of such phenomena. The NWS ceased usage of the "significant weather advisory" titling in August 2021, although it continues to issue special weather statements for sub-severe thunderstorms when warranted through the agency's local Weather Forecast Offices (WFO). (en)
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- A significant weather advisory was a hazardous weather statement issued by certain Weather Forecast Offices (WFO) of the National Weather Service (NWS) in the United States to alert the public of thunderstorm activity that is below designated severe criteria for and/or is not expected to produce severe weather. The title assigned to the advisory—alternately titled "significant weather alert" or referenced by its originating product, "special weather statement"—varied by the issuing WFO. (en)
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- Significant weather advisory (en)
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