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From Wikipedia, the free encyclopedia
The 2015 Pacific hurricane season was the second-most active Pacific hurricane season on record,[1] 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.[2] 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.
Timeline of the 2015 Pacific hurricane season | |||||
---|---|---|---|---|---|
Season boundaries | |||||
First system formed | May 28, 2015 | ||||
Last system dissipated | December 31, 2015 (record latest) | ||||
Strongest system | |||||
Name | Patricia (Most intense hurricane in the Western Hemisphere) | ||||
Maximum winds | 215 mph (345 km/h) (1-minute sustained) | ||||
Lowest pressure | 872 mbar (hPa; 25.75 inHg) | ||||
Longest lasting system | |||||
Name | Jimena | ||||
Duration | 14.75 days | ||||
| |||||
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.[nb 1] 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.[4] 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.[5] 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.[6][7]
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,[8] and Hawaii–Aleutian for storms between the International Date Line and 140°W.[9] 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.
May 15
May 28
May 29
May 30
May 31
June 1
June 2
June 3
June 4
June 5
June 6
June 7
June 8
June 9
June 10
June 11
June 13
June 15
June 16
June 17
July 8
July 10
July 11
July 12
July 13
July 14
July 16
July 17
July 18
July 23
July 24
July 27
July 29
July 30
July 31
August 2
August 3
August 6
August 7
August 8
August 9
August 10
August 12
August 13
August 14
August 16
August 18
August 21
August 22
August 23
August 24
August 25
August 26
August 27
August 28
August 29
August 30
August 31
September 1
September 2
September 3
September 4
September 6
September 7
September 8
September 9
September 10
September 18
September 20
September 21
September 22
September 25
September 26
September 27
September 28
September 29
September 30
October 3
October 4
October 6
October 7
October 8
October 9
October 10
October 11
October 12
October 14
October 15
October 17
October 18
October 19
October 20
October 21
October 22
October 23
October 24
October 25
October 26
October 27
November 18
November 19
November 22
November 23
November 24
November 25
November 26
November 27
November 28
November 30
December 31
January 1
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