 | Parts of this article (those related to August to November 2017) need to be updated. (December 2017) |
| Timeline of the 2017 Pacific hurricane season | |||||
|---|---|---|---|---|---|
 Season summary map | |||||
| Season boundaries | |||||
| First system formed | May 9, 2017 | ||||
| Last system dissipated | October 28, 2017 | ||||
| Strongest system | |||||
| Name | Fernanda | ||||
| Maximum winds | 145 mph (230 km/h) (1-minute sustained) | ||||
| Lowest pressure | 948 mbar (hPa; 27.99 inHg) | ||||
| Longest lasting system | |||||
| Name | Fernanda, Hilary and Irwin | ||||
| Duration | 10.50 days | ||||
| |||||
The 2017 Pacific hurricane season was an event in the annual cycle of tropical cyclone formation, in which tropical cyclones form in the eastern Pacific Ocean. 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 eastern Pacific basin.[1] However, storm formation is possible at any time of the year, as illustrated in 2017 by the formation of the season's first named storm, Tropical Storm Adrian, on May 10. At the time, this was the earliest formation of a tropical storm on record in the basin.[2]
Four time zones are utilized in the basin: Central for storms east of 106°W, Mountain between 114.9°W and 106°W, Pacific between 140°W and 115°W,[3] 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 is included. This timeline documents tropical cyclone formations, strengthening, weakening, landfalls, extratropical transitions, and dissipations during the season.
- ^ Christopher W. Landsea; Neal Dorst; Erica Rule (June 2, 2011). "G: Tropical Cyclone Climatology". Hurricane Research Division: Frequently Asked Questions. National Oceanic and Atmospheric Administration. G1) When is hurricane season ?. Retrieved April 21, 2017.
{{cite book}}:|work=ignored (help) - ^ Michael J. Brennan (November 22, 2017). Tropical Storm Adrian (PDF) (Report). National Hurricane Center. Retrieved September 1, 2018.
- ^ Robbie J. Berg (May 28, 2015). Tropical Depression One-E Discussion Number 1 (Report). Miami, Florida: National Hurricane Center. Retrieved June 17, 2017.