The 2024 Pacific hurricane season was a tropical cyclone season in the Pacific Ocean east of the International Date Line (IDL) in the Northern Hemisphere. It officially began on May 15 in the eastern Pacific (east of 140ðW), and on June 1 in the central Pacific (from the IDL east to 140ðW); it ended in both on November 30. These dates, adopted by convention, historically describe the period in each year when most tropical cyclogenesis occurs in these regions of the Pacific. The season's first system, Tropical Storm Aletta, developed on July 4, and its last, Tropical Depression FourteenE, dissipated on November 7.
This timeline documents tropical cyclone formations, strengthening, weakening, landfalls, extratropical transitions, and dissipations during the season. It includes information that was not released throughout the season, meaning that data from post-storm reviews by the National Hurricane Center, such as a storm that was not initially warned upon, has been included.
The time stamp for each event is first stated using Coordinated Universal Time (UTC), the 24-hour clock where 00:00 = midnight UTC. The NHC uses both UTC and the time zone where the center of the tropical cyclone is currently located. The time zones utilized (east to west) are: Central, Mountain, Pacific and Hawaii. In this timeline, the respective area time is included in parentheses. Additionally, figures for maximum sustained winds and position estimates are rounded to the nearest 5 units (miles, or kilometers), following National Hurricane Center practice. Direct wind observations are rounded to the nearest whole number. Atmospheric pressures are listed to the nearest millibar and nearest hundredth of an inch of mercury.
Timeline
May
- No tropical cyclones form in the Eastern Pacific basin during the month of May.
May 15
- The Eastern Pacific hurricane season officially begins.
June
- No tropical cyclones form in the Eastern or Central Pacific basins during the month of June.
June 1
- The Central Pacific hurricane season officially begins.
July
July 4
- 06:00 UTC (12:00 a.m. CST) at A tropical depression forms from a tropical wave about south of Manzanillo, Colima.
- 12:00 UTC (6:00 a.m. CST) at The tropical depression strengthens into Tropical Storm Aletta about 160 mi (260 km) south-southwest of Manzanillo; it simultaneously reaches its peak intensity, with maximum sustained winds of and a minimum barometric pressure of .
July 5
- 06:00 UTC (11:00 p.m. MST, July 4) at Tropical Storm Aletta weakens into a tropical depression about 270 mi (435 km) west of Manzanillo.
July 6
- 00:00 UTC (5:00 p.m. MST, July 5) at Tropical Depression Aletta degenerates into a remnant low about 445 mi (715 km) west of Manzanillo, and later dissipates.
July 24
- 12:00 UTC (5:00 a.m. MST) at A tropical depression forms from an area of unsettled weather about south of Cabo San Lucas, Baja California Sur.
- 18:00 UTC (11:00 a.m. MST) at The tropical depression strengthens into Tropical Storm Bud about 430 mi (695 km) south-southwest of Cabo San Lucas.
July 25
- 06:00 UTC (11:00 p.m. MST, July 24) at Tropical Storm Bud reaches its peak intensity, with maximum sustained winds of and a minimum barometric pressure of , about 435 mi (705 km) southwest of Cabo San Lucas.
July 26
- 06:00 UTC (11:00 p.m. PDT, July 25) at Tropical Storm Bud degenerates into a post-tropical cyclone about 615 mi (990 km) west-southwest of Cabo San Lucas, and subsequently dissipates.
July 31
- 06:00 UTC (11:00 p.m. MST, July 30) at A tropical depression forms from a tropical wave south-southwest of Manzanillo, Colima.
- 12:00 UTC (5:00 a.m. MST) at The tropical depression strengthens into Tropical Storm Carlotta about 320 mi (520 km) south-southwest of Manzanillo.
August
August 2
- 06:00 UTC (11:00 p.m. MST, August 1) at Tropical Storm Carlotta strengthens into a Category 1 hurricane about 80 mi (130 km) east-southeast of Clarion Island.
August 3
- 00:00 UTC (5:00 p.m. PDT, August 2) at A tropical depression forms from an area of unsettled weather about west-southwest of the southern tip of the Baja California peninsula.
- 06:00 UTC (11:00 p.m. PDT, August 2) at Hurricane Carlotta reaches its peak intensity, with maximum sustained winds of and a minimum barometric pressure of , about 240 mi (390 km) west of Clarion Island.
- 06:00 UTC (11:00 p.m. PDT, August 2) at The recently formed tropical depression strengthens into Tropical Storm Daniel about west-southwest of the southern tip of the Baja California peninsula.
August 4
- 12:00 UTC (5:00 a.m. PDT) at Hurricane Carlotta weakens into a tropical storm about 580 mi (935 km) west of Clarion Island.
- 12:00 UTC (5:00 a.m. MST) at A tropical depression forms from an area of low pressure about 605 mi (975 km) west-southwest of Manzanillo, Colima.
- 18:00 UTC (11:00 a.m. PDT) at Tropical Storm Daniel reaches its peak intensity, with maximum sustained winds of 40 mph (65 km/h) and a minimum barometric pressure of , about west-southwest of the southern tip of the Baja California peninsula.
August 5
- 00:00 UTC (5:00 p.m. MST, August 4) at The tropical depression that had formed 12 hours earlier strengthens into Tropical Storm Emilia about 660 mi (1,065 km) west-southwest of Manzanillo.
- 12:00 UTC (5:00 a.m. MST) at Tropical Storm Fabio forms from an area of low pressure about south-southwest of Manzanillo.
- 18:00 UTC (11:00 a.m. PDT) at Tropical Storm Daniel weakens into a tropical depression about west-southwest of the southern tip of the Baja California peninsula, and subsequently dissipates.
August 6
- 00:00 UTC (5:00 p.m. PDT, August 5) at Tropical Storm Carlotta degenerates into a post-tropical cyclone about 885 mi (1,425 km) west of Clarion Island, and subsequently dissipates.
- 12:00 UTC (5:00 a.m. MST) at Tropical Storm Fabio reaches its peak intensity, with maximum sustained winds of and a minimum barometric pressure of , about west-southwest of Manzanillo.
August 7
- 06:00 UTC (11:00 p.m. PDT, August 6) at Tropical Storm Emilia reaches its peak intensity, with maximum sustained winds of 70 mph (110 km/h) and a minimum barometric pressure of , about 775 mi (1,250 km) west-southwest of Manzanillo.
- 18:00 UTC (11:00 a.m. PDT) at Tropical Storm Fabio transitions to a post-tropical cyclone about west of Manzanillo, and is subsequently absorbed by Tropical Storm Emilia.
August 8
- 18:00 UTC (11:00 a.m. PDT) at Tropical Storm Emilia degenerates into a remnant low about 1,280 mi (2,055 km) west of Manzanillo.
August 18
- 06:00 UTC (11:00 p.m. MST, August 17) at A tropical depression forms from an interaction between a tropical wave and the monsoon trough about 610 mi (980 km) south of the southern tip of the Baja California peninsula.
- 18:00 UTC (11:00 a.m. MST) at The aforementioned tropical depression strengthens into Tropical Storm Gilma about 580 mi (935 km) south of the southern tip of the Baja California peninsula.
August 21
- 06:00 UTC (11:00 p.m. PDT, August 20) at Tropical Storm Gilma strengthens into a Category 1 hurricane about 915 mi (1,475 km) west-southwest of the southern tip of the Baja California peninsula.
- 18:00 UTC (11:00 a.m. PDT) at Hurricane Gilma strengthens to Category 2 intensity about 975 mi (1,565 km) west-southwest of the southern tip of the Baja California peninsula.
August 22
- 00:00 UTC (5:00 p.m. PDT, August 21) at Hurricane Gilma strengthens to Category 3 intensity about 990 mi (1,595 km) west-southwest of the southern tip of the Baja California peninsula, making it the first major hurricane of the season.
- 12:00 UTC (5:00 a.m. PDT) at Hurricane Gilma reaches its initial peak intensity, with maximum sustained winds of 125 mph (205 km/h) and a barometric pressure of , about 1,035 mi (1,665 km) west-southwest of the southern tip of the Baja California peninsula.
- 15:00 UTC (5:00 a.m. HST) at Tropical Depression OneC forms about 985 mi (1,590 km) east-southeast of Hilo, Hawaii.
- 21:00 UTC (11:00 a.m. HST) at Tropical Depression OneC strengthens into Tropical Storm Hone about 885 mi (1,430 km) east-southeast of Hilo, Hawaii.
August 23
- 18:00 UTC (11:00 a.m. PDT) at Hurricane Gilma weakens to Category 2 intensity about 1,180 mi (1,900 km) west-southwest of the southern tip of the Baja California peninsula.
August 24
- 18:00 UTC (11:00 a.m. PDT) at Hurricane Gilma restrengthens to Category 3 intensity about 1,380 mi (2,225 km) west-southwest of the southern tip of the Baja California peninsula.
August 25
- 00:00 UTC (2:00 p.m. HST, August 24) at Hurricane Gilma strengthens to Category 4 intensity about 1,435 mi (2,305 km) west-southwest of the southern tip of the Baja California peninsula. It simultaneously reaches its peak intensity, with maximum sustained winds of 130 mph (215 km/h) and a minimum barometric pressure of .
- 06:00 UTC (11:00 p.m. PDT, August 24) at A tropical depression forms from an area of low pressure about 800 mi (1,290 km) southwest of the southern tip of the Baja California peninsula.
- 09:00 UTC (11:00 p.m. HST, August 24) at Tropical Storm Hone strengthens into a Category 1 hurricane about 105 mi (170 km) south of Hilo, Hawaii.
- 12:00 UTC (5:00 a.m. PDT) at Hurricane Gilma weakens to Category 3 intensity about 1,540 mi (2,485 km) west of the southern tip of the Baja California peninsula.
- 12:00 UTC (5:00 a.m. PDT) at The aforementioned tropical depression strengthens into Tropical Storm Hector about 865 mi (1,390 km) southwest of the southern tip of the Baja California peninsula.
- 15:00 UTC (5:00 a.m. HST) at Hurricane Hone reaches its peak intensity, with maximum sustained winds of 85 mph (140 km/h) and a minimum barometric pressure of , about 115 mi (190 km) southwest of Hilo, Hawaii.
August 26
- 00:00 UTC (5:00 p.m. PDT, August 25) at Hurricane Gilma weakens to Category 2 intensity about 1,645 mi (2,650 km) west of the southern tip of the Baja California peninsula.
- 09:00 UTC (11:00 p.m. HST, August 25) at Hurricane Hone weakens into a tropical storm about 180 mi (290 km) southwest of Honolulu, Hawaii.
August 27
- 00:00 UTC (5:00 p.m. PDT, August 26) at Tropical Storm Hector reaches its peak intensity, with maximum sustained winds of 60 mph (95 km/h) and a minimum barometric pressure of , about 1,135 mi (1,825 km) west-southwest of the southern tip of the Baja California peninsula.
- 12:00 UTC (2:00 a.m. HST) at Hurricane Gilma weakens to Category 1 intensity about 1,975 mi (3,180 km) west of the southern tip of the Baja California peninsula, shortly after crossing over into the Central Pacific basin.
- 18:00 UTC (8:00 a.m. HST) at Hurricane Gilma weakens into a tropical storm about 2,060 mi (3,315 km) west of the southern tip of the Baja California peninsula.
August 28
- 18:00 UTC (11:00 a.m. PDT) at Tropical Storm Hector degenerates into a post-tropical cyclone about 1,535 mi (2,475 km) west-southwest of the southern tip of the Baja California peninsula.
August 29
- 12:00 UTC (2:00 a.m. HST) at Tropical Storm Gilma weakens into a tropical depression about 2,585 mi (4,160 km) west of the southern tip of the Baja California peninsula.
August 30
- 00:00 UTC (2:00 p.m. HST, August 29) at Tropical Depression Gilma degenerates into a remnant low about 2,710 mi (4,365 km) west of the southern tip of the Baja California peninsula.
- 03:00 UTC (5:00 p.m. HST, August 29) at Tropical Storm Hone weakens into a tropical depression about 530 mi (850 km) south-southeast of Midway Island.
August 31
- 15:00 UTC (5:00 a.m. HST) at Tropical Depression Hone restrengthens into a tropical storm about 405 mi (650 km) south-southeast of Midway Island.
September
September 1
- 21:00 UTC (11:00 a.m. HST) at Tropical Storm Hone transitions into an extratropical cyclone about 175 mi (280 km) southwest of Midway Island, as it crosses into the Western Pacific basin.
September 12
- 12:00 UTC (5:00 a.m. MST) at A tropical depression forms from an area of unsettled weather about southwest of Cabo Corrientes, Jalisco.
- 18:00 UTC (11:00 a.m. MST) at The recently formed tropical depression strengthens into Tropical Storm Ileana about west-southwest of Cabo Corrientes.
September 14
- ~00:00 UTC (5:00 p.m. MST, September 13) near Tropical Storm Ileana makes its closest approach to the Baja California peninsula, passing within of Cabo Pulmo National Park.
- 18:00 UTC (11:00 a.m. MST) at Tropical Storm Ileana reaches maximum sustained winds of 50 mph (85 km/h) about south-southeast of Los Mochis, Sinaloa.
September 15
- 00:00 UTC (5:00 p.m. MST, September 14) at Tropical Storm Ileana reaches a minimum barometric pressure of about west of Topolobampo, Sinaloa.
- 06:00 UTC (11:00 p.m. MST, September 14) at Tropical Storm Ileana weakens below gale force, degenerates into a remnant low about southwest of Topolobampo, and later dissipates.
September 22
- 12:00 UTC (6:00 a.m. CST) at A tropical depression forms from a tropical wave about south-southeast of Acapulco.
September 23
- 00:00 UTC (6:00 p.m. CST, September 22) at The recently formed tropical depression strengthens into Tropical Storm John about south-southeast of Acapulco.
- <18:00 UTC (12:00 p.m. CST) at Tropical Storm John strengthens into a Category 1 hurricane about southeast of Acapulco.
September 24
- 00:00 UTC (6:00 p.m. CST, September 23) at Hurricane John rapidly strengthens to Category 3 intensity about south-southeast of Marquelia, Guerrero, making it the second major hurricane of the season.
- 03:15 UTC (9:15 p.m. CST, September 23) at Hurricane John reaches its peak intensity, with maximum sustained winds of and a minimum barometric pressure of , as it makes its first landfall near Marquelia.
- 06:00 UTC (12:00 a.m. CST) at Hurricane John weakens to Category 2 intensity inland, about east of Acapulco.
- 12:00 UTC (6:00 a.m. CST) at Hurricane John rapidly weakens into a tropical storm inland, about north-northwest of Acapulco.
- 18:00 UTC (12:00 p.m. CST) at Tropical Storm John dissipates inland for the first time, about northwest of Acapulco.
September 25
- 12:00 UTC (6:00 a.m. CST) at The remnants of Hurricane John regenerate into a tropical storm about south of Zihuatanejo, Guerrero.
September 26
- 12:00 UTC (6:00 a.m. CST) at Tropical Storm John restrengthens into a Category 1 hurricane about west-southwest of Zihuatanejo. It simultaneously reaches its secondary peak intensity, with sustained winds of and a barometric pressure of .
September 27
- 00:00 UTC (6:00 p.m. CST, September 26) at Hurricane John weakens back into a tropical storm about west of Zihuatanejo.
- 16:00 UTC (10:00 a.m. CST) at Tropical Storm John makes its second and final landfall near Playa Zapote de Tizupan, Michoacán, with sustained winds of and a barometric pressure of .
- 18:00 UTC (12:00 p.m. CST) at Tropical Storm John is last noted as a tropical cyclone inland, just northwest of Playa Zapote de Tizupan; it dissipates for the second and final time within the next six hours.
October
October 1
October 2
- 06:00 UTC (12:00 a.m. CST) at The recently formed tropical depression strengthens into an unnamed tropical storm about south-southwest of Salina Cruz.
October 3
- 00:00 UTC (6:00 p.m. CST, October 2) at The unnamed tropical storm reaches its peak intensity, with maximum sustained winds of and a minimum barometric pressure of , about south-southwest of Salina Cruz.
- 12:00 UTC (6:00 a.m. CST) at The unnamed tropical storm is last noted as a tropical cyclone about south of Salina Cruz; it dissipates within the next six hours.
October 21
- 12:00 UTC (6:00 a.m. CST) at A tropical depression forms from the remnants of Atlantic Tropical Storm Nadine about south of Acapulco.
- 18:00 UTC (12:00 p.m. CST) at The recently formed tropical depression strengthens into Tropical Storm Kristy about south-southwest of Acapulco.
October 23
- 00:00 UTC (5:00 p.m. MST, October 22) at Tropical Storm Kristy strengthens into a Category 1 hurricane about south of the southern tip of the Baja California peninsula.
- 06:00 UTC (11:00 p.m. MST, October 22) at Hurricane Kristy strengthens to Category 2 intensity about south of the southern tip of the Baja California peninsula.
- 12:00 UTC (8:00 a.m. MST) at Hurricane Kristy strengthens to Category 3 intensity about south-southwest of the southern tip of the Baja California peninsula, making it the third and final major hurricane of the season.
- 18:00 UTC (1:00 p.m. MST) at Hurricane Kristy strengthens to Category 4 intensity about south-southwest of the southern tip of the Baja California peninsula.
October 24
- 18:00 UTC (1:00 p.m. PDT) at Hurricane Kristy strengthens to Category 5 intensity about west-southwest of the southern tip of the Baja California peninsula. It simultaneously reaches its peak intensity, with maximum sustained winds of 160 mph (260 km/h) and a minimum barometric pressure of , making it the strongest storm of the season.
October 25
- 06:00 UTC (11:00 p.m. PDT, October 24) at Hurricane Kristy weakens to Category 4 intensity about west-southwest of the southern tip of the Baja California peninsula.
- 18:00 UTC (11:00 a.m. PDT) at Hurricane Kristy weakens to Category 3 intensity about west-southwest of the southern tip of the Baja California peninsula.
October 26
- 00:00 UTC (5:00 p.m. PDT, October 25) at Hurricane Kristy weakens to Category 2 intensity about west-southwest of the southern tip of the Baja California peninsula.
- 12:00 UTC (5:00 a.m. PDT) at Hurricane Kristy weakens to Category 1 intensity about west of the southern tip of the Baja California peninsula.
- 18:00 UTC (11:00 a.m. PDT) at Hurricane Kristy weakens into a tropical storm about west of the southern tip of the Baja California peninsula.
October 27
- 12:00 UTC (5:00 a.m. PDT) at Tropical Storm Kristy transitions into a post-tropical cyclone about west of the southern tip of the Baja California peninsula.
November
November 1
- 12:00 UTC (5:00 a.m. PDT) at A tropical depression forms from a tropical wave about southwest of the southern tip of the Baja California peninsula.
November 2
- 06:00 UTC (11:00 p.m. PDT, November 1) at The recently formed tropical depression strengthens into Tropical Storm Lane about west-southwest of the southern tip of the Baja California peninsula.
- 12:00 UTC (5:00 a.m. PDT) at Tropical Storm Lane reaches its peak intensity, with maximum sustained winds of 45 mph (75 km/h) and a minimum barometric pressure of , about west-southwest of the southern tip of the Baja California peninsula.
November 3
- 06:00 UTC (11:00 p.m. PDT, November 2) at Tropical Storm Lane weakens into a tropical depression about west-southwest of the southern tip of the Baja California peninsula.
- 12:00 UTC (4:00 a.m. PST) at Tropical Depression Lane degenerates into a remnant low about west-southwest of the southern tip of the Baja California peninsula, and later dissipates.
November 5
- 00:00 UTC (5:00 p.m. MST, November 4) at Tropical Depression FourteenE forms from an area of low pressure about south of the southern tip of the Baja California peninsula. It simulatenously reaches its peak intensity, with maximum sustained winds of 35 mph (55 km/h) and a minimum barometric pressure of .
November 7
- 06:00 UTC (12:00 a.m. CST) at Tropical Depression FourteenE is last noted as a tropical cyclone about south-southeast of the southern tip of the Baja California peninsula; it dissipates within the next six hours.
November 30
- The season officially ends.
See also
Notes
References
External links