The 2024 Pacific hurricane season is the current 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 140°W), and on June 1 in the central Pacific (from the IDL east to 140°W); it will end 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.[1] The season's first system, Tropical Storm Aletta, developed on July 4.
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.
By convention, meteorologists use one time zone when issuing forecasts and making observations: Coordinated Universal Time (UTC), and also use the 24-hour clock (where 00:00 = midnight UTC).[2] Tropical cyclone advisories in the Eastern North Pacific basin use both UTC and the nautical time zone where the center of the tropical cyclone is currently located. Time zones utilized (east to west) are: Central, Mountain, Pacific and Hawaii. In this timeline, all information is listed by UTC first, with the respective regional time zone included in parentheses. Additionally, figures for maximum sustained winds and position estimates are rounded to the nearest 5 units (knots, 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.[1]
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.[1]
18:00 UTC (11:00 a.m. PDT) at 13°24′N130°30′W / 13.4°N 130.5°W / 13.4; -130.5 (Daniel reaches its peak intensity.) – Tropical Storm Daniel reaches its peak intensity, with maximum sustained winds of 40 mph (65 km/h) and a minimum barometric pressure of 1005 mbar (29.68 inHg), about 1,495 mi (2,410 km) west-southwest of the southern tip of the Baja California peninsula.[6]
00:00 UTC (2:00 p.m. HST, August 24) at 17°42′N131°24′W / 17.7°N 131.4°W / 17.7; -131.4 (Gilma reaches Category 4 strength and its peak intensity.) – 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 950 mbar (28.05 inHg).[12]
00:00 UTC (5:00 p.m. PDT, August 26) at 16°54′N126°12′W / 16.9°N 126.2°W / 16.9; -126.2 (Hector reaches its peak intensity.) – Tropical Storm Hector reaches its peak intensity, with maximum sustained winds of 60 mph (95 km/h) and a minimum barometric pressure of 998 mbar (29.47 inHg), about 1,135 mi (1,825 km) west-southwest of the southern tip of the Baja California peninsula.[15]
03:00 UTC (9:00 p.m. CST, September 23) at 16°18′N98°48′W / 16.3°N 98.8°W / 16.3; -98.8 (John reaches Category 3 strength and its peak intensity.) – Hurricane John strengthens to Category 3 intensity about 15 mi (20 km) west of Punta Maldonado, making it the second major hurricane of the season. It simultaneously reaches its peak intensity, with maximum sustained winds of 120 mph (195 km/h) and a minimum barometric pressure of 959 mbar (28.32 inHg).[29]
15:00 UTC (8:00 a.m. PDT) at 11°18′N130°06′W / 11.3°N 130.1°W / 11.3; -130.1 (Lane reaches its peak intensity.) – Tropical Storm Lane reaches its peak intensity, with maximum sustained winds of 45 mph (75 km/h) and a minimum barometric pressure of 1004 mbar (29.65 inHg), about 1,550 mi (2,500 km) west-southwest of the southern tip of the Baja California peninsula.[56]
00:00 UTC (5:00 p.m. MST, November 4) at 11°00′N108°42′W / 11.0°N 108.7°W / 11.0; -108.7 (Tropical Depression Fourteen-E forms.) – Tropical Depression Fourteen‑E forms from an area of low pressure about 825 mi (1,325 km) 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 1006 mbar (29.71 inHg).[61]
^On November 3, daylight saving time ended[57] in areas of the basin located within the Pacific Time Zone,[58] resulting in the gap between local time and Coordinated Universal Time widening by one hour in those areas.
^ abcdPapin, Philippe (August 23, 2024). Tropical Storm Aletta (EP012024)(PDF) (Report). Miami, Florida: National Hurricane Center. Archived(PDF) from the original on September 27, 2024. Retrieved September 30, 2024.
^ abcdCangialosi, John (September 25, 2024). Tropical Storm Bud (EP022024)(PDF) (Report). Miami, Florida: National Hurricane Center. Archived(PDF) from the original on September 30, 2024. Retrieved September 30, 2024.
^ abcdefBlake, Eric (November 19, 2024). Hurricane Carlotta (EP032024)(PDF) (Report). Miami, Florida: National Hurricane Center. Archived(PDF) from the original on November 23, 2024. Retrieved November 30, 2024.
^ abcdPasch, Richard J. (January 8, 2025). Tropical Storm Daniel (EP042024)(PDF) (Report). Miami, Florida: National Hurricane Center. Archived(PDF) from the original on January 9, 2025. Retrieved January 9, 2025.
^ abcdKelly, Larry A. (November 7, 2024). Tropical Storm Emilia (EP052024)(PDF) (Report). Miami, Florida: National Hurricane Center. Archived(PDF) from the original on November 7, 2024. Retrieved November 7, 2024.
^ abcdefghijklmnoCangialosi, John P. (November 7, 2024). Hurricane Gilma (EP072024)(PDF) (Report). Miami, Florida: National Hurricane Center. Archived(PDF) from the original on November 7, 2024. Retrieved November 7, 2024.
^Ballard, Maureen; Ballard, Robert (August 22, 2024). Tropical Storm Hone Advisory Number 2 (Report). Honolulu, Hawaii: Central Pacific Hurricane Center. Retrieved August 22, 2024.
^ abcdBerg, Robbie (December 5, 2024). Tropical Storm Hector (EP082024)(PDF) (Report). Miami, Florida: National Hurricane Center. Archived(PDF) from the original on December 5, 2024. Retrieved December 5, 2024.
^Gibbs, Alex; Jelsema, Jon (August 24, 2024). Hurricane Hone Advisory Number 12 (Report). Honolulu, Hawaii: Central Pacific Hurricane Center. Retrieved August 25, 2024.
^Jelsema, Jon; Gibbs, Alex (August 25, 2024). Hurricane Hone Advisory Number 13 (Report). Honolulu, Hawaii: Central Pacific Hurricane Center. Retrieved October 27, 2024.
^Ballard, Robert (August 25, 2024). Tropical Storm Hone Advisory Number 16 (Report). Honolulu, Hawaii: Central Pacific Hurricane Center. Retrieved August 26, 2024.
^Ballard, Robert; Foster, Matthew (August 29, 2024). Tropical Depression Hone Advisory Number 31 (Report). Honolulu, Hawaii: Central Pacific Hurricane Center. Retrieved August 30, 2024.
^Powell, Jeff (August 31, 2024). Tropical Storm Hone Advisory Number 37 (Report). Honolulu, Hawaii: Central Pacific Hurricane Center. Retrieved October 1, 2024.
^ abcdefBerg, Robbie (December 17, 2024). Tropical Storm Ileana (EP092024)(PDF) (Report). Miami, Florida: National Hurricane Center. Archived(PDF) from the original on December 17, 2024. Retrieved December 17, 2024.
^Hagen, Andrew (September 23, 2024). Hurricane John Advisory Number 6 (Report). Miami, Florida: National Hurricane Center. Retrieved October 1, 2024.
^Kelly, Larry (September 23, 2024). Hurricane John Advisory Number 7 (Report). Miami, Florida: National Hurricane Center. Retrieved October 1, 2024.
^Papin, Philippe (September 23, 2024). Hurricane John Tropical Cyclone Update (Report). Miami, Florida: National Hurricane Center. Retrieved October 1, 2024.
^Papin, Philippe (September 24, 2024). Tropical Storm John Advisory Number 8 (Report). Miami, Florida: National Hurricane Center. Retrieved October 1, 2024.
^Cangialosi, John; Bucci, Lisa (September 24, 2024). Remnants of John Special Advisory Number 10 (Report). Miami, Florida: National Hurricane Center. Retrieved October 1, 2024.
^Bucci, Lisa; Zelinsky, Rachel (September 25, 2024). Tropical Storm John Advisory Number 11 (Report). Miami, Florida: National Hurricane Center. Retrieved October 1, 2024.
^Kelly, Larry (September 27, 2024). Remnants of John Advisory Number 20 (Report). Miami, Florida: National Hurricane Center. Retrieved October 1, 2024.
^Reinhart, Brad (November 2, 2024). Tropical Storm Lane Advisory Number 3 (Report). Miami, Florida: National Hurricane Center. Retrieved November 2, 2024.
^Kelly, Larry (November 2, 2024). Tropical Storm Lane Advisory Number 4 (Report). Miami, Florida: National Hurricane Center. Retrieved November 3, 2024.
^ abReinhart, Brad J. (January 8, 2025). Tropical Depression Fourteen-E (EP142024)(PDF) (Report). Miami, Florida: National Hurricane Center. Archived(PDF) from the original on January 9, 2025. Retrieved January 9, 2025.