Timeline of the 2017 Pacific hurricane season

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]

Timeline of the
2017 Pacific hurricane season
Season summary map
Season boundaries
First system formedMay 9, 2017
Last system dissipatedOctober 28, 2017
Strongest system
NameFernanda
Maximum winds145 mph (230 km/h)
(1-minute sustained)
Lowest pressure948 mbar (hPa; 27.99 inHg)
Longest lasting system
NameFernanda, Hilary and Irwin
Duration10.50 days
Storm articles

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.

Timeline
Tropical Storm Selma (2017)Hurricane Max (2017)Tropical Storm Lidia (2017)Tropical Storm Beatriz (2017)Saffir–Simpson scale

May

May 9

Adrian shortly before being classified as a tropical depression on May 9

May 10

May 11

May 15

  • The 2017 Eastern Pacific hurricane season officially begins.[1]

May 31

June

June 1

Beatriz as a weak tropical storm shortly before landfall

June 2

June 11

June 12

Storm path of Tropical Storm Calvin

June 13

Dora near its peak intensity as a Category 1 hurricane on June 26

June 24

June 25

June 26

June 27

June 28

July

July 7

Eugene as the season's first major hurricane on July 9

July 9

  • 00:00 UTC (6:00 p.m. MDT July 8) at 14.1°N 113.4°W / 14.1; -113.4 (Tropical Storm Eugene intensifies) – Tropical Storm Eugene intensifies into a Category 1 hurricane roughly 630 miles (1020 km) south-southwest of the southern tip of Baja California.[7]
  • 06:00 UTC (12:00 a.m. MDT July 8) at 15.2°N 114.1°W / 15.2; -114.1 – Hurricane Eugene rapidly intensifies into a Category 2 hurricane approximately 600 miles (960 km) south-southwest of the southern tip of the Baja California Peninsula.[7]
  • 12:00 UTC (6:00 a.m. MDT) at 16.3°N 115.0°W / 16.3; -115.0 – Hurricane Eugene rapidly intensifies into a Category 3 hurricane and simultaneously attains its peak intensity with maximum sustained winds of 115 mph (185 km/h) and a minimum barometric pressure of 966 mbar (hPa; 28.53 inHg) about 565 miles (910 km) southwest of the southern tip of the Baja California Peninsula.[7]

July 10

July 11

  • 00:00 UTC (5:00 p.m. PDT July 10) at 19.6°N 118.0°W / 19.6; -118.0 – Hurricane Eugene weakens to a tropical storm about 560 miles (900 km) south-southwest of Punta Eugenia, Mexico.[7]
  • 18:00 UTC (12:00 p.m. MDT) at 12.2°N 108.4°W / 12.2; -108.4 – Tropical Depression Six-E develops from an area of low pressure about 740 miles (1,190 km) south of the southern tip of the Baja California Peninsula.[8]

July 12

  • 12:00 UTC (5:00 a.m. PDT) at 23.2°N 121.5°W / 23.2; -121.5 – Tropical Storm Eugene weakens to a tropical depression roughly 510 miles (815 km) west-southwest of Punta Eugenia, Mexico.[7]
  • 12:00 UTC (6:00 a.m. MDT) at 11.9°N 111.8°W / 11.9; -111.8 – Tropical Depression Six-E intensifies into Tropical Storm Fernanda about 760 miles (1,225 km) south of the southern tip of the Baja California Peninsula.[8]
  • 18:00 UTC (11:00 a.m. PDT) at 23.7°N 122.2°W / 23.7; -122.2 – Tropical Depression Eugene degenerates to a remnant low approximately 525 miles (845 km) west-southwest of Punta Eugenia, Mexico.[7]
Category 4 Hurricane Fernanda shortly after attaining its peak intensity on July 15

July 13

  • 18:00 UTC (11:00 a.m. PDT) at 11.3°N 115.5°W / 11.3; -115.5 – Tropical Storm Fernanda intensifies into a Category 1 hurricane about 900 miles (1,450 km) south-southwest of the southern tip of the Baja California Peninsula.[8]

July 14

  • 06:00 UTC (11:00 p.m. PDT July 13) at 11.0°N 117.4°W / 11.0; -117.4 – Hurricane Fernanda intensifies into a Category 2 hurricane roughly 975 miles (1,570 km) southwest of the southern tip of the Baja California Peninsula.[8]
  • 18:00 UTC (11:00 a.m. PDT) at 10.7°N 119.3°W / 10.7; -119.3 – Hurricane Fernanda intensifies into a Category 3 hurricane approximately 1,020 miles (1,640 km) southwest of the southern tip of the Baja California Peninsula.[8]

July 15

  • 00:00 UTC (5:00 p.m. PDT July 14) at 10.7°N 120.3°W / 10.7; -120.3 – Hurricane Fernanda intensifies into a Category 4 hurricane and simultaneously reaches its peak intensity of 145 mph (230 km/h) and a minimum barometric pressure of 948 mbar (hPa; 27.99 inHg), the second strongest hurricane so far south in the eastern Pacific, about 1,060 miles (1,710 km) southwest of the southern tip of the Baja California Peninsula.[8][9]
Greg as a weak tropical storm on July 18

July 17

  • 00:00 UTC (5:00 p.m. PDT July 16) at 12.8°N 128.8°W / 12.8; -128.8 – Hurricane Fernanda weakens to a Category 3 hurricane about 1545 miles (2485 km) west-southwest of the southern tip of Baja California.[8]
  • 06:00 UTC (11:00 p.m. PDT July 16) at 13.1°N 115.9°W / 13.1; -115.9 – Tropical Depression Eight-E develops from an area of low pressure approximately 815 miles (1,315 km) southwest of the southern tip of the Baja California Peninsula.[10]
  • 12:00 UTC (6:00 a.m. CDT) at 14.1°N 105.0°W / 14.1; -105.0 – Tropical Depression Seven-E develops from an area of low pressure approximately 340 miles (550 km) south of Manzanillo, Colima.[11]
  • 18:00 UTC (11:00 a.m. PDT) at 13.7°N 116.8°W / 13.7; -116.8 –Tropical Depression Eight-E reaches its peak intensity of 35 mph (55 km/h) and a minimum barometric pressure of 1007 mbar (hPa; 29.74 inHg).[10]

July 18

  • 00:00 UTC (5:00 p.m. PDT July 17) at 14.4°N 131.8°W / 14.4; -131.8 – Hurricane Fernanda weakens to a Category 2 hurricane roughly 1,560 miles (2,515 km) west-southwest of the southern tip of the Baja California Peninsula.[8]
  • 12:00 UTC (6:00 a.m. MDT) at 14.5°N 107.9°W / 14.5; -107.9 – Tropical Depression Seven-E intensifies into Tropical Storm Greg about 375 miles (600 km) southwest of Manzanillo, Colima.[11]

July 19

July 20

  • 06:00 UTC (11:00 p.m. PDT July 20) at 18.0°N 137.5°W / 18.0; -137.5 – Hurricane Fernanda weakens to a tropical storm roughly 1,140 miles (1,835 km) east of Hilo, Hawaii.[8]
  • 06:00 UTC (11:00 p.m. PDT July 20) at 13.9°N 122.5°W / 13.9; -122.5 – Tropical Depression Eight-E degenerates to a remnant area of low pressure roughly 1130 miles (1820 km) west-southwest of the southern tip of the Baja California Peninsula.[10]

July 21

  • 00:00 UTC (5:00 p.m. PDT July 20) at 14.2°N 117.0°W / 14.2; -117.0 – Tropical Storm Greg attains peak winds of 60 mph (95 km/h) and a minimum barometric pressure of 1000 mbar (hPa; 29.53 inHg) while located 810 miles (1,305 km) southwest of the southern tip of the Baja California Peninsula.[11]
  • 12:00 UTC (7:00 a.m. CDT) at 8.8°N 92.3°W / 8.8; -92.3 – Tropical Depression Nine-E develops from an area of low pressure approximately 505 miles (815 km) south-southeast of Puerto Ángel, Oaxaca.[12]

July 22

July 23

July 24

July 25

Hurricanes Hilary and Irwin undergoing Fujiwhara interaction on July 28

July 26

July 27

  • 06:00 UTC (12:00 a.m. MDT)  at 17.1°N 114.6°W / 17.1; -114.6 – Hurricane Hilary weakens back to a Category 1 hurricane around 515 miles (825 km) southwest of the southern tip of the Baja California Peninsula.[12]

July 28

  • 00:00 UTC (5:00 p.m. PDT July 27) at 18.1°N 116.9°W / 18.1; -116.9 – Hurricane Hilary further weakens to a tropical storm about 575 miles (925 km) west-southwest of the southern tip of the Baja California Peninsula.[12]

July 31

  • 00:00 UTC (5:00 p.m. PDT July 30) at 25.3°N 127.9°W / 25.3; -127.9 – Tropical Storm Hilary degenerates to a post-tropical cyclone about 1,185 miles (1,905 km) west-northwest of the southern tip of the Baja California Peninsula.[12]

August

August 1

  • 18:00 UTC (11:00 a.m. PDT) at 26.4°N 129.5°W / 26.4; -129.5 – Tropical Storm Irwin degenerates to a post-tropical cyclone roughly 1,230 miles (1,980 km) west-northwest of the southern tip of the Baja California Peninsula.[13]

August 4

August 5

August 11

Tropical Storm Jova near peak intensity on August 11, 2017
Tropical Storm Jova off the coast of Mexico on August 11

August 12

August 13

August 18

August 19

August 20

August 21

Hurricane Kenneth over the ocean near peak intensity.
Hurricane Kenneth near its peak intensity on August 21

August 22

August 23

August 30

September

September 1

September 2

September 3

September 11

September 13

September 16

September 17

September 18

November

November 30

  • The 2017 Pacific hurricane season officially ends.[1]

See also

References
  1. Christopher W. Landsea; Neal Dorst; Erica Rule (June 2, 2011). "G: Tropical Cyclone Climatology". Hurricane Research Division: Frequently Asked Questions. G1) When is hurricane season ?. Retrieved April 21, 2017. {{cite book}}: |work= ignored (help)
  2. Michael J. Brennan (November 22, 2017). Tropical Storm Adrian (PDF) (Report). National Hurricane Center. Retrieved September 1, 2018.
  3. Robbie J. Berg (May 28, 2015). Tropical Depression One-E Discussion Number 1 (Report). Miami, Florida: National Hurricane Center. Retrieved June 17, 2017.
  4. Daniel P. Brown (July 13, 2017). Tropical Storm Beatriz (PDF) (Report). National Hurricane Center. Retrieved September 1, 2018.
  5. John P. Cangialosi (June 19, 2018). Tropical Storm Calvin (PDF) (Report). National Hurricane Center. Retrieved September 1, 2018.
  6. Robbie J. Berg (November 20, 2017). Hurricane Dora (PDF) (Report). National Hurricane Center. Retrieved September 1, 2018.
  7. Avila, Lixion A.; Landsea, Christopher W. (October 20, 2017). Hurricane Eugene (PDF) (Report). Miami, Florida: National Hurricane Center. Retrieved February 24, 2021.
  8. Brennan, Michael J.; Powell, Jeff (February 28, 2019). Hurricane Fernanda (PDF) (Report). Miami, Florida: National Hurricane Center. Retrieved February 24, 2021.
  9. NHC E. Pacific Ops (July 14, 2017). "Fernanda is now a category 4 hurricane- the 2nd strongest storm so far south in the eastern Pacific..." Twitter. Retrieved July 15, 2017.
  10. Beven II, John L. (March 21, 2018). Tropical Depression Eight-E (PDF) (Report). Miami, Florida: National Hurricane Center. Retrieved February 27, 2021.
  11. Pasch, Richard J.; Zelinsky, David A.; Jeselma, Jon (March 16, 2018). Tropical Storm Greg (PDF) (Report). Miami, Florida: National Hurricane Center. Retrieved February 24, 2021.
  12. Stewart, Stacy R. (January 21, 2018). Hurricane Hilary (PDF) (Report). Miami, Florida: National Hurricane Center. Retrieved March 5, 2021.
  13. Zelinsky, David A. (January 12, 2018). Hurricane Irwin (PDF) (Report). Miami, Florida: National Hurricane Center. Retrieved March 6, 2021.
  14. "IBTrACS – International Best Track Archive for Climate Stewardship". www.atms.unca.edu. Retrieved 2021-02-27.
  15. Brown, Daniel P. (November 21, 2017). Tropical Depression Eleven-E (PDF) (Report). Miami, Florida: National Hurricane Center. Retrieved March 6, 2021.
  16. Cangialosi, John P. (November 16, 2017). Tropical Storm Jova (PDF) (Report). Miami, Florida: National Hurricane Center. Retrieved March 7, 2021.
  17. Berg, Robbie (January 28, 2018). Hurricane Kenneth (PDF) (Report). Miami, Florida: National Hurricane Center. Retrieved March 10, 2021.
  18. Avila, Lixion A. (December 20, 2017). Tropical Storm Lidia (PDF) (Report). Miami, Florida: National Hurricane Center. Retrieved March 16, 2021.
  19. Blake, Eric S. (January 9, 2018). Hurricane Otis (PDF) (Report). Miami, Florida: National Hurricane Center. Retrieved March 20, 2021.
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