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Flight 19 was the designation of a group of five General Motors TBF Avenger torpedo bombers that disappeared over the Bermuda Triangle on December 5, 1945, after losing contact during a United States Navy overwater navigation training flight from Naval Air Station Fort Lauderdale, Florida.
An example of a tornado warning polygon issued by the National Weather Service. A tornado warning (SAME code: TOR) is a public warning that is issued by weather forecasting agencies to an area in the direct path of a tornado, or a severe thunderstorm capable of producing one, and advises individuals in that area to take cover.
The tornado travelled from top-right to bottom-left in this photo. At 8:58 p.m. CDT on October 20, a tornado began in Dallas County, Texas, near the interaction of Spur 348 and Luna Road, snapping large tree limbs. The tornado moved east-northeast across Interstate 35E quickly reaching high-end EF2 strength. A strip mall was severely damaged ...
Unlike a watch, a warning is issued to areas in the direct path of active severe thunderstorms, that are expecting a direct impact typically within an hour. Severe thunderstorms can cause property damage and injury due to large hail, high winds, and flooding due to torrential rainfall. The exact criteria to issue a warning varies from country ...
A watch or warning bearing the phrase is referred to as a PDS watch or PDS warning as shorthand jargon. It was first used by the Storm Prediction Center (SPC), a national guidance center of the National Weather Service , for tornado watches and eventually expanded to use for other severe weather watches and warnings by the agency's regional ...
Since its initial usage in May 1999, the National Weather Service (NWS) in the United States has used the tornado emergency bulletin — a high-end classification of tornado warning — sent through either the issuance of a warning or via a "severe weather statement" that provides updated information on an ongoing warning—that is issued when a violent tornado (confirmed by radar or ground ...
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A tornado watch is not required for a warning to be issued; tornado warnings are occasionally issued when a tornado watch is not active (i.e., when a severe thunderstorm watch is active or if conditions for tornadic development are not expected to be substantive enough to require a watch), if a severe thunderstorm has a confirmed tornado or ...