Timeline of the 2018 Pacific hurricane season

The 2018 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 began on June 1 in the central Pacific—the region 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] The season began with the formation of Tropical Depression One-E, which developed on May 10, and ended with the dissipation of the season's final storm, Tropical Storm Xavier, which dissipated as a tropical cyclone on November 5.

Timeline of the
2018 Pacific hurricane season
A map of the tracks of all the storms of the 2018 Pacific hurricane season.
Season summary map
Season boundaries
First system formedMay 10, 2018
Last system dissipatedNovember 5, 2018
Strongest system
NameWalaka
Maximum winds160 mph (260 km/h)
(1-minute sustained)
Lowest pressure921 mbar (hPa; 27.2 inHg)
Longest lasting system
NameSergio
Duration13.50 days
Storm articles

The 2018 hurricane season was exceptionally active and featured the highest Accumulated Cyclone Energy since reliable records began in 1971.[2] Throughout the season, 26 tropical depressions developed, 23 of which became tropical storms. A total of 13 tropical storms reached hurricane strength, and 10 hurricanes achieved major hurricane intensity.[3][nb 1] The basin saw above-average activity across all regions from the International Date Line to the west coast of Mexico and Central America. Activity peaked from early August to early October, with several long-lived and powerful hurricanes developing in that time period. Several storms severely affected land, such as Hurricane Lane in Hawaii and Hurricane Willa in Mexico. In contrast to the similarly active 2015 Pacific hurricane season, 2018 was not significantly influenced by the El Niño–Southern Oscillation. Instead, low pressures and increased sea surface temperatures associated with the Pacific Meridional Mode supported the development of these intense and long-lived storms.[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,[4] and Hawaii–Aleutian for storms between the International Date Line and 140°W.[5] However, for convenience, all information is listed in Coordinated Universal Time (UTC) first with the respective local time included in parentheses. This timeline includes information that was not released while the storm was active, meaning that data from post-storm reviews by the National Hurricane Center is included. This timeline documents the formation of tropical cyclones as well as the strengthening, weakening, landfalls, extratropical transitions, and dissipations during the season.

Timeline of events
Hurricane WillaTropical Storm Vicente (2018)Hurricane WalakaHurricane Sergio (2018)Hurricane Rosa (2018)Tropical Depression Nineteen-E (2018)Hurricane Olivia (2018)Hurricane Lane (2018)Tropical Storm Ileana (2018)Hurricane Hector (2018)Tropical Storm Carlotta (2018)Hurricane Bud (2018)Saffir–Simpson scale

May
Satellite image of Tropical Depression One-E several hours after being classified as a tropical cyclone on May 10
Tropical Depression One-E several hours after being classified as a tropical cyclone on May 10

May 10

May 11

May 15

  • The 2018 Eastern Pacific hurricane season officially begins.[1]

June

June 1

Satellite image of Aletta as a Category 4 hurricane on June 8
Aletta as a Category 4 hurricane on June 8
  • The 2018 Central Pacific hurricane season officially begins.[1]

June 6

June 7

June 8

June 9

June 10

Satellite image of Hurricane Bud strengthening off the southwestern Mexican coast on June 11
Hurricane Bud intensifying off the coast of Mexico on June 11

June 11

June 12

June 13

Satellite image of Tropical Storm Carlotta paralleling the southern coast of Mexico on June 16
Tropical Storm Carlotta paralleling the coast of Mexico on June 16

June 14

June 15

June 17

June 19

Satellite image of Tropical Storm Daniel at peak intensity on June 24
Tropical Storm Daniel on June 24 at peak intensity

June 24

June 25

June 26

June 27

June 28

June 29

June 30

July

July 1

Satellite image of Hurricane Fabio peaking at Category 2 intensity on July 3
Hurricane Fabio near peak intensity on July 3

July 2

July 3

July 4

July 5

July 6

July 26

July 27

Track map of Tropical Storm Gilma's path across the Eastern Pacific Ocean from July 26–29
Tropical Storm Gilma's path across the Eastern Pacific Ocean from July 26–29

July 28

  • 00:00 UTC (5:00 p.m. PDT, July 27) – Tropical Depression Nine-E dissipates roughly 1,210 miles (1,945 km) southeast of Hilo, Hawaii.[16]

July 29

July 31

August

August 1

August 2

August 3

August 4

Satellite image of Tropical Storm Ileana near peak intensity off the western coast of Mexico on August 5
Tropical Storm Ileana near peak intensity off the western coast of Mexico on August 5

August 5

August 6

August 7

August 8

August 9

August 10

Satellite image of Hector as a high-end Category 4 hurricane on August 6
Hector as a high-end Category 4 hurricane on August 6

August 11

August 12

August 13

August 15

August 17

August 18

August 19

Satellite image of Hurricane Lane at Category 5 intensity on August 22
Hurricane Lane at Category 5 intensity early on August 22

August 21

August 22

August 24

August 25

August 26

August 27

August 28

Satellite image of Hurricane Norman peaking as a Category 4 hurricane on August 30
Hurricane Norman peaking as a Category 4 hurricane on August 30

August 29

August 30

August 31

September

September 1

Satellite image of the unclassified tropical or subtropical cyclone near the International Dateline on September 2
The unclassified tropical or subtropical cyclone near the International Dateline on September 2

September 2

September 3

September 4

September 5

Satellite image of Hurricane Olivia as a high-end Category 3 hurricane on September 6
Hurricane Olivia as a high-end Category 3 hurricane on September 6

September 6

September 7

September 8

September 9

September 10

  • 12:00 UTC (2:00 a.m. HST) – Norman dissipates over 860 miles (1,385 km) north-northeast of Hilo, Hawaii.[23]

September 11

  • 06:00 UTC (8:00 p.m. HST, September 10) at 21.9°N 149.8°W / 21.9; -149.8 – Hurricane Olivia weakens to a tropical storm approximately 375 mi (605 km) northeast of Hilo, Hawaii.[24]
  • 06:00 UTC (11:00 a.m. PDT, September 10) at 21.8°N 122.6°W / 21.8; -122.6 – Tropical Storm Paul degenerates to a tropical depression about 560 mi (900 km) northwest of Clairon Island.[30]

September 12

Animated infrared satellite imagery of Tropical Storm Olivia making landfalls on Maui and Lanai, Hawaii, on September 12
Animated infrared satellite imagery of Tropical Storm Olivia making landfalls on Maui and Lanai, Hawaii, on September 12

September 13

September 14

  • 06:00 UTC (8:00 p.m. HST, September 13) at 18.9°N 164.9°W / 18.9; -164.9 – Tropical Storm Olivia degenerates into a remnant low about 485 mi (785 km) southwest of Honolulu, Hawaii.[24]

September 19

Track map plotting the path of Tropical Depression Nineteen-E across the Gulf of California from September 19–20
Path of Tropical Depression Nineteen-E across the Gulf of California from September 19–20

September 20

  • 00:00 UTC (8:00 p.m. MDT, September 19) at 27.3°N 110.9°W / 27.3; -110.9 – Tropical Depression Nineteen-E reaches its peak intensity with winds of 35 mph (55 km/h) and a minimum pressure of 1002 mbar (29.6 inHg) about 60 mi (95 km) west-southwest of Ciudad Obregón. The National Hurricane Center noted in its final report that the system may have briefly become a tropical storm before landfall but data were inconclusive.[32]
  • 03:00 UTC (11:00 p.m. MDT, September 19) at 27.6°N 110.6°W / 27.6; -110.6 – Tropical Depression Nineteen-E makes landfall at peak strength between Ciudad Obregón and Guaymas.[32]
  • 06:00 UTC (2:00 a.m. MDT) – Tropical Depression Nineteen-E rapidly dissipates over mountainous terrain about 50 mi (80 km) east of Guaymas.[32]

September 25

September 26

September 27

September 28

Satellite image of Hurricane Rosa as a Category 4 hurricane on September 28
Hurricane Rosa as a Category 4 hurricane on September 28

September 29

September 30

October

October 1

October 2

Satellite image of Hurricane Walaka at Category 5 intensity
Hurricane Walaka at Category 5 intensity while southwest of the Hawaiian Islands

October 4

October 5

October 6

  • 12:00 UTC (2:00 a.m. HST) at 35.1°N 164.5°W / 35.1; -164.5 – Tropical Storm Walaka transitions to an extratropical cyclone about 945 mi (1,520 km) north-northwest of Kauai, Hawaii.[35]

October 7

October 8

October 9

Track map plotting the path of Hurricane Sergio across the Eastern Pacific Ocean from September 29 – October 12
Path of Hurricane Sergio across the Eastern Pacific Ocean from September 29 – October 12

October 12

October 13

  • 00:00 UTC (6:00 p.m. MDT, October 12) – Tropical Depression Sergio dissipates inland over Mexico.[34]

October 14

October 15

October 16

  • 00:00 UTC (7:00 p.m. CDT, October 15) at 18.4°N 104.3°W / 18.4; -104.3 (Tropical Storm Tara reaches peak intensity) – Tropical Storm Tara reaches peak intensity with maximum sustained winds of 65 mph (100 km/h) and a minimum pressure of 995 mbar (29.4 inHg) while located roughly 45 mi (70 km) south of Manzanillo, Colima.[37]
  • 18:00 UTC (1:00 p.m. CDT) – Tropical Storm Tara dissipates roughly 40 mi (65 km) west-southwest of Manzanillo, Colima.[37]

October 19

October 20

Satellite image of Hurricane Willa as a Category 5 hurricane, southwest of Mexico
Hurricane Willa at its peak intensity on October 22 just southwest of Mexico

October 21

October 22

October 23

October 24

November
Satellite image of Tropical Storm Xavier at its peak intensity near western Mexico on November 4
Tropical Storm Xavier at its peak intensity near western Mexico on November 4

November 2

November 3

November 4

November 6

November 30

  • The 2018 Pacific hurricane season officially ends.[1]

Notes
  1. A major hurricane is a storm that ranks as Category 3 or higher on the Saffir–Simpson hurricane wind scale.[1]
  2. The figures for maximum sustained winds and position estimates are rounded to the nearest 5 units (miles per hour, kilometers per hour, miles, or kilometers), following the convention used in the National Hurricane Center's operational products for each storm. All other units are rounded to the nearest digit.
  3. The record for earliest tropical cyclone formation in the Eastern Pacific is 2020's Tropical Depression One-E on April 25.[8]
  4. Operationally, the depression that became Hurricane Walaka was not warned upon until 21:00 UTC (11 a.m. HST) by which time it was already a tropical storm.[36] It would have received the designation "One-C" prior to being named.[35]
  5. Timezones shifted back one hour to standard time when Daylight saving time ended

See also

References
  1. "G: Tropical Cyclone Climatology". Hurricane Research Division: Frequently Asked Questions. Atlantic Oceanographic and Meteorological Laboratory. June 2, 2011. G1) When is hurricane season ?. Archived from the original on July 1, 2013. Retrieved May 28, 2018.
  2. Wood, Kimberly; Klotzbach, Philip; Collins, Jennifer; Schreck, Carl (August 2019). "The Record‐Setting 2018 Eastern North Pacific Hurricane Season". Geophysical Research Letters. 46 (16): 10, 072–10, 081. Bibcode:2019GeoRL..4610072W. doi:10.1029/2019GL083657. S2CID 202192441. Archived from the original on August 8, 2020. Retrieved December 28, 2020.
  3. National Hurricane Center; Hurricane Research Division; Central Pacific Hurricane Center (April 4, 2023). "The Northeast and North Central Pacific hurricane database 1949–2022". United States National Oceanic and Atmospheric Administration's National Weather Service. A guide on how to read the database is available here. Public Domain This article incorporates text from this source, which is in the public domain.
  4. Berg, Robbie (May 28, 2015). Tropical Depression One-E Discussion Number 1 (Report). National Hurricane Center. Archived from the original on May 29, 2018. Retrieved May 28, 2018.
  5. Jelsema, Jon (August 6, 2018). Hurricane Hector Discussion Number 24 (Report). Central Pacific Hurricane Center. Archived from the original on February 27, 2020. Retrieved March 28, 2021.
  6. Berg, Robbie (July 12, 2018). Tropical Depression One-E (EP012018) (PDF) (Report). Tropical Cyclone Report. National Hurricane Center. Archived (PDF) from the original on July 18, 2018. Retrieved March 26, 2019.
  7. "Tropical Depression One-E Has Started the 2018 Eastern Pacific Hurricane Season Early, But it Won't Threaten Land". The Weather Channel. May 11, 2018. Archived from the original on July 10, 2018. Retrieved December 14, 2018.
  8. Cangialosi, John (June 30, 2020). Tropical Depression One-E (EP012020) (PDF) (Report). Tropical Cyclone Report. National Hurricane Center. Archived (PDF) from the original on October 19, 2020. Retrieved December 14, 2020.
  9. Avila, Lixion (July 31, 2018). Hurricane Aletta (EP022018) (PDF) (Report). Tropical Cyclone Report. National Hurricane Center. Archived (PDF) from the original on August 1, 2018. Retrieved March 26, 2019.
  10. Blake, Eric (October 24, 2018). Hurricane Bud (EP032018) (PDF) (Report). Tropical Cyclone Report. National Hurricane Center. Archived (PDF) from the original on December 16, 2018. Retrieved March 27, 2019.
  11. Pasch, Richard (December 19, 2018). Tropical Storm Carlotta (EP042018) (PDF) (Report). Tropical Cyclone Report. National Hurricane Center. Archived (PDF) from the original on March 2, 2019. Retrieved March 28, 2019.
  12. Beven, John (February 11, 2019). Tropical Storm Daniel (EP052018) (PDF) (Report). Tropical Cyclone Report. National Hurricane Center. Archived (PDF) from the original on March 1, 2019. Retrieved March 28, 2019.
  13. Stewart, Stacy (August 21, 2018). Tropical Storm Emilia (EP062018) (PDF) (Report). Tropical Cyclone Report. National Hurricane Center. Archived (PDF) from the original on August 28, 2018. Retrieved March 28, 2019.
  14. Brown, Daniel (November 14, 2018). Hurricane Fabio (EP072018) (PDF) (Report). Tropical Cyclone Report. National Hurricane Center. Archived (PDF) from the original on January 15, 2019. Retrieved March 28, 2019.
  15. Cangialosi, John (November 6, 2018). Tropical Storm Gilma (EP092018) (PDF) (Report). Tropical Cyclone Report. National Hurricane Center. Archived (PDF) from the original on November 15, 2018. Retrieved March 28, 2019.
  16. Zelinsky, David (August 24, 2018). Tropical Depression Nine-E (EP092018) (PDF) (Report). Tropical Cyclone Report. National Hurricane Center. Archived (PDF) from the original on October 6, 2018. Retrieved March 28, 2019.
  17. Berg, Robbie; Houston, Sam; Birchard, Thomas (July 1, 2019). Hurricane Hector (EP102018) (PDF) (Report). Tropical Cyclone Report. National Hurricane Center and Central Pacific Hurricane Center. Archived (PDF) from the original on October 28, 2018. Retrieved December 21, 2020.
  18. Avila, Lixion (November 9, 2018). Tropical Storm Ileana (EP112018) (PDF) (Report). Tropical Cyclone Report. National Hurricane Center. Archived (PDF) from the original on March 29, 2019. Retrieved March 28, 2019.
  19. Blake, Eric (November 20, 2018). Hurricane John (EP120218) (PDF) (Report). Tropical Cyclone Report. National Hurricane Center. Archived (PDF) from the original on January 15, 2019. Retrieved March 22, 2020.
  20. Latto, Andrew; Pasch, Richard (March 6, 2019). Tropical Storm Kristy (EP132018) (PDF) (Report). Tropical Cyclone Report. National Hurricane Center. Archived (PDF) from the original on May 8, 2019. Retrieved March 22, 2020.
  21. Beven, John; Wroe, Derek (December 16, 2019). Hurricane Lane (EP142018) (PDF) (Report). Tropical Cyclone Report. National Hurricane Center and Central Pacific Hurricane Center. Archived (PDF) from the original on December 15, 2019. Retrieved December 21, 2020.
  22. Stewart, Stacy; Jacobson, Chris; Houston, Sam (March 21, 2019). Hurricane Miriam (EP152018) (PDF) (Report). Tropical Cyclone Report. National Hurricane Center and Central Pacific Hurricane Center. Archived (PDF) from the original on January 15, 2020. Retrieved December 21, 2020.
  23. Brown, Daniel; Powell, Jeff (August 8, 2019). Hurricane Norman (EP162018) (PDF) (Report). Tropical Cyclone Report. National Hurricane Center and Central Pacific Hurricane Center. Archived (PDF) from the original on July 5, 2020. Retrieved December 21, 2020.
  24. Cangialosi, John; Jelsema, Jon (July 25, 2019). Hurricane Olivia (EP172018) (PDF) (Report). Tropical Cyclone Report. National Hurricane Center and Central Pacific Hurricane Center. Archived (PDF) from the original on December 9, 2018. Retrieved December 14, 2020.
  25. Turk, Michael (September 1, 2020). [96C Tropical Cyclone Position at 17:30 UTC on September 1] (Report). National Oceanic and Atmospheric Administration Satellite Products and Service Division. Archived from the original on April 28, 2021. Retrieved December 28, 2020.
  26. National Weather Service Office in Honolulu, Hawaii [@NWSHonolulu] (August 31, 2018). "Thanks for pointing this out. The circulation that was associated with Lane dissipated several days ago and was absorbed by the same upper level low responsible for this feature. This feature is now a sub-tropical gale low, but we will continue to keep an eye on it!" (Tweet). Retrieved December 28, 2020 – via Twitter.
  27. Turk, Michael (September 1, 2020). [96C Tropical Cyclone Position at 23:30 UTC on September 1] (Report). National Oceanic and Atmospheric Administration Satellite Products and Service Division. Archived from the original on April 15, 2021. Retrieved December 28, 2020.
  28. Fisher (September 2, 2020). [96C Tropical Cyclone Position at 17:30 UTC on September 2] (Report). National Oceanic and Atmospheric Administration Satellite Products and Service Division. Retrieved December 28, 2020.
  29. Kibler, Jamie (September 3, 2020). [96C Tropical Cyclone Position at 5:30 UTC on September 3] (Report). National Oceanic and Atmospheric Administration Satellite Products and Service Division. Archived from the original on April 28, 2021. Retrieved December 28, 2020.
  30. Zelinsky, David (October 4, 2018). Tropical Storm Paul (EP182018) (PDF) (Report). Tropical Cyclone Report. National Hurricane Center. Archived (PDF) from the original on November 16, 2018. Retrieved December 21, 2020.
  31. Gomes, Andrew (September 13, 2018). "Olivia makes brief but historic landfall on Maui". Honolulu Star Advertiser. Archived from the original on September 14, 2018. Retrieved December 14, 2020.
  32. Berg, Robbie (November 29, 2018). Tropical Depression Nineteen-E (EP192018) (PDF) (Report). Tropical Cyclone Report. National Hurricane Center. Archived (PDF) from the original on December 1, 2018. Retrieved December 21, 2020.
  33. Avila, Lixion (July 23, 2019). Hurricane Rosa (EP202018) (PDF) (Report). Tropical Cyclone Report. National Hurricane Center. Archived (PDF) from the original on July 3, 2019. Retrieved December 21, 2020.
  34. Blake, Eric (February 26, 2019). Hurricane Sergio (EP212018) (PDF) (Report). Tropical Cyclone Report. National Hurricane Center. Archived (PDF) from the original on March 6, 2019. Retrieved December 21, 2020.
  35. Birchard, Thomas; Houston, Sam (June 9, 2020). Hurricane Walaka (CP012018) (PDF) (Report). Tropical Cyclone Report. Central Pacific Hurricane Center. Archived (PDF) from the original on June 12, 2020. Retrieved December 16, 2020.
  36. Wroe, Derek (September 29, 2018). Tropical Storm Walaka Advisory Number 1 (Report). Central Pacific Hurricane Center. Archived from the original on October 28, 2020. Retrieved December 28, 2020.
  37. Pasch, Richard (March 28, 2019). Tropical Storm Tara (EP222018) (PDF) (Report). Tropical Cyclone Report. National Hurricane Center. Archived (PDF) from the original on May 7, 2019. Retrieved December 21, 2020.
  38. Latto, Andrew; Beven, John (April 10, 2019). Tropical Storm Vicente (EP232018) (PDF) (Report). Tropical Cyclone Report. National Hurricane Center. Archived (PDF) from the original on April 20, 2019. Retrieved December 21, 2020.
  39. Brennan, Michael (April 2, 2019). Hurricane Willa (EP242018) (PDF) (Report). Tropical Cyclone Report. National Hurricane Center. Archived (PDF) from the original on April 10, 2019. Retrieved December 21, 2020.
  40. Sullivan, Brian (October 22, 2020). "Hurricane Willa Becomes Category 5 Storm Off Coast of Mexico". Bloomberg News. Retrieved January 1, 2021.
  41. Brown, Daniel (February 8, 2019). Tropical Storm Xavier (EP252018) (PDF) (Report). Tropical Cyclone Report. National Hurricane Center. Archived (PDF) from the original on March 28, 2019. Retrieved March 27, 2019.
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