翻訳と辞書 Words near each other ・ Particle-laden flows ・ Particle-size distribution ・ ParticleIllusion ・ Particles of Truth ・ Particolored flying squirrel ・ Particoloured ・ Particracy ・ Particular ・ Particular Church ・ Particular judgment ・ Particular point topology ・ Particular social group ・ Particular values of Riemann zeta function ・ Particular values of the Gamma function ・ Particularism ・ Particularly Dangerous Situation ・ Particularly vulnerable tribal group ・ Particulate (disambiguation) ・ Particulate inheritance ・ Particulate matter sampler ・ Particulate pollution ・ Particulates ・ Partido ・ Partido (Camarines Sur) ・ Partido Abe Kapampangan ・ Partido Acción Ciudadana ・ Partido Acción Nacional ・ Partido alto ・ Partido Auténtico ・ Partido Comunista Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Particularly Dangerous Situation ： ウィキペディア英語版 Particularly Dangerous Situation A Particularly Dangerous Situation (PDS) is a type of enhanced wording first used by the Storm Prediction Center (a national guidance center of the National Weather Service, the meteorological agency of the United States) on certain severe weather watches. It is issued at the discretion of the forecaster composing the watch and implies that there is an enhanced risk of very severe and life-threatening weather, usually a major tornado outbreak or (much less often) a long-lived, extreme derecho event, but possibly another weather hazard. PDS watches are quite uncommon; less than 3% of watches issued by the SPC from 1996 to 2005 were PDS watches, or an average of 24 each year. When a PDS watch is issued, there are often more PDS watches issued for the same weather system, even on the same day during major outbreaks, so the number of days per year that a PDS watch is issued is significantly lower. ==Background== The first PDS tornado watch was issued by Robert H. Johns for the April 2, 1982 tornado outbreak across the southern and central Great Plains. While historically applied only to severe thunderstorm, tornado and flash flood watches (i.e., Severe Local Storm "polygonal" events), PDS wording could theoretically be applied to other types of weather watches (such as winter storm, high wind, hurricane, or fire weather watches) when an enhanced threat for such conditions exists. These watches have generally (but not always) been issued during a high risk or an upper-end moderate risk either of severe storms from the SPC's convective outlooks or of flash flooding from the Weather Prediction Center's Excessive Rainfall Outlooks. On April 24, 2011, the National Weather Service Weather Forecast Office in Memphis, Tennessee issued the first PDS flash flood watch to highlight the threat for widespread, significant and potentially life-threatening flash flooding due to repeated rounds of severe thunderstorms. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Particularly Dangerous Situation」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.