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- The 2015 Pacific hurricane season was the second-most active Pacific hurricane season on record, and featured the strongest tropical cyclone ever observed in the Western Hemisphere: Hurricane Patricia. The season officially started on May 15 in the Eastern Pacific—east of 140°W—and on June 1 in the Central Pacific—between the International Date Line and 140°W—and ended on November 30. These dates typically cover the period of each year when most tropical cyclones form in the Northeastern Pacific tropical cyclone basin. The season's first storm, Hurricane Andres, developed on May 28; the season's final storm, Tropical Depression Nine-C, dissipated on December 31, well after the official end of the season. Throughout the season, 31 tropical depressions developed, 26 of which became tropical storms, a record-tying 16 of them reached hurricane strength, and a record-breaking 11 achieved major hurricane intensity. Activity in the Central Pacific shattered records, with 16 tropical cyclones forming in or entering the basin; the previous highest was 11 during the 1992 and 1994 seasons. On August 30, three hurricanes at Category 4 strength—Ignacio, Jimena, and Kilo—existed simultaneously in the Northeastern Pacific, which was a first for the basin. On October 23, Hurricane Patricia became the strongest hurricane ever recorded in the Western Hemisphere, with a minimum atmospheric pressure of 872 mbar (hPa; 25.75 inHg) and maximum sustained winds of 215 mph (345 km/h). Activity in the basin was boosted by the strong 2014–16 El Niño event, which brought anomalously high sea surface temperatures and low vertical wind shear that helped the numerous systems form and intensify. Four time zones are utilized in the basin: Central for storms east of 106.0°W, Mountain from 106.0°W to 114.9°W, Pacific from 115.0°W to 140.0°W, and Hawaii–Aleutian for storms between the International Date Line and 140°W. However, for convenience, all information is listed by Coordinated Universal Time (UTC) first with the respective local time included in parentheses. This timeline includes information that was not operationally released, meaning that data from post-storm reviews by the National Hurricane Center and Central Pacific Hurricane Center are included. This timeline documents tropical cyclone formations, strengthening, weakening, landfalls, extratropical transitions, and dissipations during the season. (en)
- 2015年太平洋颶風季是有纪录以来第二活跃的太平洋颶風季，颶風派翠莎更刷新西半球史上最强熱帶氣旋纪录。飓风季5月15日在东太平洋（西经140度线以东）正式开始，6月1日在中太平洋（国际日期变更线到西经140度线）开始，11月30日结束，传统上每年国际日期变更线以东绝大多数熱帶氣旋都是这段时间形成。本季首场风暴是5月28日成型的飓风安德烈斯，最后的气旋是第九C号热带低气压，直到12月31日才消散，比飓风季正式结束还晚一个多月。 全季共形成31个热带低气压，其中26个升级热带风暴，16场达飓风强度，追平史上最高纪录；11场达到大型飓风标准，再度追平历史纪录。中太平洋活跃度创纪录，形成或进入的热带气旋有16个之多，远超1992与1994年太平洋颶風季并列保持的纪录（11个）。8月30日，东北太平洋同时出现伊格纳西奥、希梅纳、基洛三场四级飓风，这在史上尚属首次。10月23日，颶風派翠莎达到最大持续风速每小时345公里、气压872毫巴（百帕，25.75英寸汞柱）最高强度，刷新西半球热带气旋强度纪录。强烈的聖嬰現象令海面温度高到异常，加上垂直风切变化，共同导致2015年东太平洋的热带气旋特别活跃，大量热带气旋形成并增强。 西经106度以东的风暴采用北美中部时区，114.9至106度间采用北美山区时区，140至115度采用太平洋时区，140度至国际日期变更线采用夏威夷－阿留申時區，但为方便起见，本文统一采用协调世界时。2015年太平洋飓风季时间轴记载全季所有热带或亚热带气旋形成、增强、减弱、登陆，转变成溫帶氣旋及消散的具体信息，还包括飓风季期间没有发布的信息，如美国国家飓风中心飓风季过后重新分析并回顾各风暴时的更新，包括最大持续风速、位置、距离在内的所有数字均四舍五入成整数。 (zh)
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- The 2015 Pacific hurricane season was the second-most active Pacific hurricane season on record, and featured the strongest tropical cyclone ever observed in the Western Hemisphere: Hurricane Patricia. The season officially started on May 15 in the Eastern Pacific—east of 140°W—and on June 1 in the Central Pacific—between the International Date Line and 140°W—and ended on November 30. These dates typically cover the period of each year when most tropical cyclones form in the Northeastern Pacific tropical cyclone basin. The season's first storm, Hurricane Andres, developed on May 28; the season's final storm, Tropical Depression Nine-C, dissipated on December 31, well after the official end of the season. (en)
- 2015年太平洋颶風季是有纪录以来第二活跃的太平洋颶風季，颶風派翠莎更刷新西半球史上最强熱帶氣旋纪录。飓风季5月15日在东太平洋（西经140度线以东）正式开始，6月1日在中太平洋（国际日期变更线到西经140度线）开始，11月30日结束，传统上每年国际日期变更线以东绝大多数熱帶氣旋都是这段时间形成。本季首场风暴是5月28日成型的飓风安德烈斯，最后的气旋是第九C号热带低气压，直到12月31日才消散，比飓风季正式结束还晚一个多月。 全季共形成31个热带低气压，其中26个升级热带风暴，16场达飓风强度，追平史上最高纪录；11场达到大型飓风标准，再度追平历史纪录。中太平洋活跃度创纪录，形成或进入的热带气旋有16个之多，远超1992与1994年太平洋颶風季并列保持的纪录（11个）。8月30日，东北太平洋同时出现伊格纳西奥、希梅纳、基洛三场四级飓风，这在史上尚属首次。10月23日，颶風派翠莎达到最大持续风速每小时345公里、气压872毫巴（百帕，25.75英寸汞柱）最高强度，刷新西半球热带气旋强度纪录。强烈的聖嬰現象令海面温度高到异常，加上垂直风切变化，共同导致2015年东太平洋的热带气旋特别活跃，大量热带气旋形成并增强。 (zh)
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