The 2023 Pacific hurricane season was a fairly active Pacific hurricane season. In the eastern Pacific basin (east of 140ðW), 17 named storms formed; 10 of those became hurricanes, and 8 further intensified into major hurricanes (category 3 or higher on the 5-level SaffirâÂÂSimpson wind speed scale). In the central Pacific basin (between 140ðW and the International Date Line), no tropical cyclones formed (for the fourth consecutive season), though four entered into the basin from the east. The season officially began on May 15, 2023, in the eastern Pacific, and on June 1 in the central Pacific; 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 Adrian, developed on June 27, and its last, Tropical Storm Ramon, dissipated on November 26.
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
June 1
- The Central Pacific hurricane season officially begins.
June 27
June 28
- 12:00 UTC (6:00 a.m. MDT) at Tropical Storm Adrian strengthens into a Category 1 hurricane about southwest of Manzanillo.
June 29
- 06:00 UTC (1:00 a.m. CDT) at Tropical Depression TwoE forms from a tropical wave about southeast of Acapulco, Guerrero.
- 12:00 UTC (7:00 a.m. CDT) at Tropical Depression TwoE strengthens into Tropical Storm Beatriz about south-southeast of Acapulco.
June 30
- 06:00 UTC (12:00 a.m. MDT) at Hurricane Adrian intensifies to Category 2 strength about west-southwest of Manzanillo.
- 12:00 UTC (6:00 a.m. MDT) at Hurricane Adrian reaches its peak intensity, with maximum sustained winds of and a minimum central pressure of , about west-southwest of Manzanillo.
- 12:00 UTC (7:00 a.m. CDT) at Tropical Storm Beatriz strengthens into a Category 1 hurricane about southeast of Manzanillo, Colima.
- 18:00 UTC (4:00 p.m. CDT) at Hurricane Beatriz reaches its peak intensity, with maximum sustained winds of and a minimum central pressure of , about southeast of Manzanillo.
July
July 1
- 00:00 UTC (6:00 p.m. MDT, June 30) at Hurricane Adrian weakens to Category 1 strength about west-southwest of Manzanillo.
- 06:00 UTC (1:00 a.m. CDT) at Hurricane Beatriz weakens into a tropical storm while making landfall west of Manzanillo International Airport with sustained winds of and a central pressure of , then quickly dissipates.
- 12:00 UTC (6:00 a.m. MDT) at Hurricane Adrian weakens into a tropical storm about west of Manzanillo.
July 2
- 12:00 UTC (5:00 a.m. PDT) at Tropical Storm Adrian degenerates into a remnant low about west-northwest of Manzanillo, and subsequently dissipates.
July 11
July 13
- 12:00 UTC (5:00 a.m. PDT) at Tropical Storm Calvin strengthens into a Category 1 hurricane about southwest of the southern tip of the Baja California peninsula.
July 14
- 00:00 UTC (5:00 p.m. PDT, July 13) at Hurricane Calvin intensifies to Category 2 strength about southwest of the southern tip of the Baja California peninsula.
- 12:00 UTC (5:00 a.m. PDT) at Hurricane Calvin intensifies to Category 3 strength about southwest of the southern tip of the Baja California peninsula, making it the first major hurricane of the season.
- 18:00 UTC (11:00 a.m. PDT) at Hurricane Calvin reaches its peak intensity, with maximum sustained winds of and a minimum central pressure of , about west-southwest of the southern tip of the Baja California Peninsula.
July 15
- 06:00 UTC (11:00 p.m. PDT, July 14) at Hurricane Calvin weakens to Category 2 strength about west-southwest of the southern tip of the Baja California peninsula.
July 16
- 00:00 UTC (5:00 p.m. PDT, July 15) at Hurricane Calvin weakens to Category 1 strength about southeast of Ka Lae, the southernmost point of the Big Island of Hawaii.
- 18:00 UTC (11:00 a.m. PDT) at Hurricane Calvin weakens into a tropical storm about southeast of Ka Lae.
July 17
- 12:00 UTC (2:00 a.m. HST) at Tropical Storm Calvin enters the Central Pacific basin about southeast of Ka Lae.
July 19
- 18:00 UTC (8:00 a.m. HST) at Tropical Storm Calvin degenerates into a remnant low about southwest of Ka Lae, and later dissipates.
July 20
July 21
- 00:00 UTC (5:00 p.m. PDT, July 20) at Tropical Depression FourE reaches its peak intensity, with maximum sustained winds of and a minimum central pressure of .
July 22
- 00:00 UTC (5:00 p.m. PDT, July 21) at Tropical Depression FourE degenerates into a remnant low.
July 31
- 18:00 UTC (1:00 p.m. CDT) at Tropical Depression FiveE forms from a tropical wave about south of Manzanillo, Colima.
August
August 1
- 06:00 UTC (12:00 a.m. MDT) at Tropical Depression FiveE strengthens into Tropical Storm Dora about south-southwest of Manzanillo.
August 2
- 00:00 UTC (6:00 p.m. MDT, August 1) at Tropical Storm Dora strengthens into a Category 1 hurricane about west-southwest of Manzanillo.
- 12:00 UTC (6:00 a.m. MDT) at Hurricane Dora intensifies to Category 2 strength about south-southwest of the southern tip of the Baja California peninsula.
August 3
- 00:00 UTC (5:00 p.m. PDT, August 2) at Hurricane Dora intensifies to Category 3 strength about southwest of the southern tip of the Baja California peninsula, making it the second major hurricane of the season.
- 06:00 UTC (11:00 p.m. PDT, August 2) at Hurricane Dora intensifies to Category 4 strength about southwest of the southern tip of the Baja California peninsula.
- 12:00 UTC (5:00 a.m. PDT) at Hurricane Dora weakens to Category 3 strength about southwest of the southern tip of the Baja California peninsula.
August 4
- 00:00 UTC (5:00 p.m. PDT, August 3) at Hurricane Dora re-intensifies to Category 4 strength about southwest of the southern tip of the Baja California peninsula.
- 12:00 UTC (8:00 a.m. PDT) at Hurricane Dora weakens to Category 3 strength about west-southwest of the southern tip of the Baja California peninsula.
August 5
- 00:00 UTC (5:00 p.m. PDT, August 4) at Hurricane Dora weakens to Category 2 strength about west-southwest of the southern tip of the Baja California peninsula.
- 12:00 UTC (6:00 a.m. MDT) at Tropical Depression SixE forms from a tropical wave.
- 18:00 UTC (11:00 a.m. PDT) at Hurricane Dora rapidly re-intensifies to Category 4 strength about west-southwest of the southern tip of the Baja California peninsula.
- 18:00 UTC (12:00 p.m. MDT) at Tropical Depression SixE strengthens into Tropical Storm Eugene.
August 6
- 00:00 UTC (5:00 p.m. PDT, August 5) at Hurricane Dora reaches its peak intensity, with maximum sustained winds of and a minimum central pressure of , about west-southwest of the southern tip of the Baja California peninsula.
- 12:00 UTC (6:00 a.m. MDT) at Tropical Storm Eugene reaches its peak intensity, with maximum sustained winds of and a minimum central pressure of .
- ~15:00 UTC (5:00 a.m. HST) at Hurricane Dora enters the Central Pacific basin about east-southeast of Hawaii.
August 7
- 12:00 UTC (5:00 a.m. PDT) at Tropical Storm Eugene degenerates into a remnant low.
August 10
- 12:00 UTC (2:00 a.m. HST) at Hurricane Dora weakens to Category 3 strength south of Johnston Atoll.
August 11
- 18:00 UTC (8:00 a.m. HST) at Hurricane Dora weakens to Category 2 strength.
August 12
- 00:00 UTC (09:00 JST) at Hurricane Dora briefly re-intensifies to Category 3 strength very near the International Date Line; upon crossing Date Line, Dora exits the Central Pacific basin and is redesignated as a typhoon.
- 12:00 UTC (6:00 a.m. MDT) at Tropical Depression SevenE forms from a tropical wave.
August 13
- 00:00 UTC (6:00 p.m. MDT, August 12) at Tropical Depression SevenE strengthens into Tropical Storm Fernanda.
- 18:00 UTC (11:00 a.m. PDT) at Tropical Storm Fernanda strengthens into a Category 1 hurricane.
August 14
- 00:00 UTC (5:00 p.m. PDT, August 13) at Hurricane Fernanda intensifies to Category 2 strength.
- 00:00 UTC (5:00 p.m. PDT, August 13) at Tropical Depression EightE forms.
- 06:00 UTC (11:00 p.m. PDT, August 13) at Hurricane Fernanda intensifies to Category 3 strength, making it the third major hurricane of the season.
- 06:00 UTC (11:00 p.m. PDT, August 13) at Tropical Depression EightE strengthens into Tropical Storm Greg, then later enters the Central Pacific basin.
- 12:00 UTC (5:00 a.m. PDT) at Hurricane Fernanda intensifies to Category 4 strength; it simultaneously reaches its peak intensity, with maximum sustained winds of and a minimum central pressure of .
August 15
- 00:00 UTC (5:00 p.m. PDT, August 14) at Hurricane Fernanda weakens to Category 3 strength.
- 06:00 UTC (8:00 p.m. HST, August 14) at Tropical Storm Greg reaches its peak intensity, with maximum sustained winds of and a minimum central pressure of , southeast of Hilo, Hawaii.
- 12:00 UTC (5:00 a.m. PDT) at Hurricane Fernanda weakens to Category 2 strength.
August 16
- 06:00 UTC (11:00 p.m. PDT, August 15) at Hurricane Fernanda weakens to Category 1 strength.
- 06:00 UTC (1:00 a.m. CDT) at A tropical depression forms from a tropical wave about south of Acapulco, Guerrero.
- 12:00 UTC (5:00 a.m. PDT) at Hurricane Fernanda weakens into a tropical storm.
- 12:00 UTC (7:00 a.m. CDT) at The tropical depression strengthens into Tropical Storm Hilary about southwest of Acapulco.
August 17
- 06:00 UTC (11:00 p.m. PDT, August 16) at Tropical Storm Fernanda degenerates into a remnant low, and subsequently dissipates.
- 12:00 UTC (6:00 a.m. MDT) at Tropical Storm Hilary strengthens into a Category 1 hurricane about southwest of Manzanillo, Colima.
- 18:00 UTC (12:00 p.m. MDT) at Hurricane Hilary intensifies to Category 2 strength about southwest of Manzanillo.
- 18:00 UTC (8:00 a.m. HST) at Tropical Storm Greg weakens into a tropical depression south of the island of Hawaii, and later degenerates into a remnant low.
August 18
- 00:00 UTC (6:00 p.m. MDT, August 17) at Hurricane Hilary intensifies to Category 3 strength about west-southwest of Manzanillo, making it the fourth major hurricane of the season.
- 06:00 UTC (12:00 a.m. MDT) at Hurricane Hilary intensifies to Category 4 strength about west-southwest of Manzanillo; it simultaneously reaches its peak intensity, with maximum sustained winds of and a minimum central pressure of .
- 18:00 UTC (12:00 p.m. MDT) at Hurricane Hilary weakens to Category 3 strength about west of Manzanillo.
August 19
- 00:00 UTC (6:00 p.m. MDT, August 18) at Hurricane Hilary re-intensifies to Category 4 strength about west of Manzanillo.
- 12:00 UTC (6:00 a.m. MDT) at Hurricane Hilary weakens to Category 3 strength about south-southeast of Punta Eugenia, Baja California Sur.
- 18:00 UTC (12:00 p.m. MDT) at Hurricane Hilary weakens to Category 2 strength about south of Punta Eugenia.
August 20
- 00:00 UTC (6:00 p.m. MDT, August 19) at Hurricane Hilary weakens to Category 1 strength about south of Punta Eugenia.
- 12:00 UTC (5:00 a.m. PDT) at Hurricane Hilary weakens into a tropical storm near Isla Cedros, about northwest of Punta Eugenia.
- 17:00 UTC (10:00 a.m. PDT) at Tropical Storm Hilary makes landfall with sustained winds of and a central pressure of near San Fernando, Baja California.
- 21:00 UTC (2:00 p.m. PDT) at Tropical Storm Hilary degenerates into a post-tropical cyclone inland over northern Baja California, and is soon absorbed by a non-tropical low.
August 26
- 18:00 UTC (11:00 a.m. PDT) at A tropical depression forms from a tropical wave in the west-central eastern Pacific.
August 27
- 12:00 UTC (5:00 a.m. PDT) at The tropical depression strengthens into Tropical Storm Irwin.
August 29
- 00:00 UTC (5:00 p.m. PDT, August 28) at Tropical Storm Irwin reaches its peak intensity, with maximum sustained winds of and a minimum central pressure of .
- 12:00 UTC (5:00 a.m. PDT) at Tropical Storm Irwin degenerates into a remnant low, and subsequently dissipates.
September
September 4
- 18:00 UTC (1:00 p.m. CDT) at A tropical depression forms over the eastern Pacific from a tropical wave.
September 5
- 06:00 UTC (1:00 a.m. CDT) at The tropical depression strengthens into Tropical Storm Jova far to the south-southeast of the southern tip of the Baja California peninsula.
September 6
- 06:00 UTC (12:00 a.m. MDT) at Tropical Storm Jova strengthens into a Category 1 hurricane.
- 12:00 UTC (6:00 a.m. MDT) at Hurricane Jova intensifies to Category 2 strength.
- 18:00 UTC (12:00 p.m. MDT) at Hurricane Jova rapidly intensifies to Category 4 strength, making it the fifth major hurricane of the season.
September 7
- 00:00 UTC (6:00 p.m. MDT, September 6) at Hurricane Jova intensifies to Category 5 strength; it simultaneously reaches its peak intensity, with maximum sustained winds of and a minimum central pressure of .
- 12:00 UTC (5:00 a.m. PDT) at Hurricane Jova weakens to Category 4 strength.
September 8
- 06:00 UTC (11:00 p.m. PDT, September 7) at Hurricane Jova weakens to Category 3 strength.
- 12:00 UTC (5:00 a.m. PDT) at Hurricane Jova weakens to Category 2 strength.
- 18:00 UTC (11:00 a.m. PDT) at Hurricane Jova weakens to Category 1 strength.
September 9
- 06:00 UTC (11:00 p.m. PDT, September 8) at Hurricane Jova weakens into a tropical storm.
September 10
- 06:00 UTC (11:00 p.m. PDT, September 9) at Tropical Storm Jova degenerates into a remnant low.
September 15
- 12:00 UTC (5:00 a.m. PDT) at Tropical Depression TwelveE forms from a tropical wave.
- 18:00 UTC (11:00 a.m. PDT) at Tropical Depression TwelveE reaches its peak intensity, with maximum sustained winds of and a minimum central pressure of .
September 17
- ~00:00 UTC (2:00 p.m. HST, September 16) at Tropical Depression TwelveE enters the Central Pacific basin.
September 18
- 06:00 UTC (8:00 p.m. HST, September 17) at Tropical Depression TwelveE degenerates into a remnant low far southeast of the Big Island of Hawaii, and later dissipates.
September 19
- 06:00 UTC (11:00 p.m. PDT, September 18) at A tropical depression forms southwest of the southern tip of the Baja California peninsula.
- 12:00 UTC (5:00 a.m. PDT) at The tropical depression strengthens into Tropical Storm Kenneth southwest of the southern tip of the Baja California peninsula.
September 21
- 00:00 UTC (5:00 p.m. PDT, September 20) at Tropical Storm Kenneth reaches its peak intensity, with maximum sustained winds of and a minimum central pressure of , west-southwest of the southern tip of the Baja California peninsula.
September 22
- 06:00 UTC (11:00 p.m. PDT, September 21) at Tropical Storm Kenneth weakens into a tropical depression west of the southern tip of the Baja California peninsula.
- 12:00 UTC (5:00 a.m. PDT) at Tropical Depression Kenneth degenerates into a remnant low west of the southern tip of the Baja California peninsula, and subsequently dissipates.
September 23
- 12:00 UTC (5:00 a.m. PDT) at Tropical Depression FourteenE forms from a tropical wave about southwest of the southern tip of the Baja California peninsula.
- 18:00 UTC (11:00 a.m. PDT) at Tropical Depression FourteenE reaches its peak intensity, with maximum sustained winds of and a minimum central pressure of , about southwest of the southern tip of the Baja California peninsula.
September 25
- 00:00 UTC (5:00 p.m. PDT, September 24) at Tropical Depression FourteenE degenerates into a remnant low about west-southwest of the southern tip of the Baja California peninsula.
October
October 3
- 00:00 UTC (7:00 p.m. CDT, October 2) at A tropical depression forms from a tropical wave about south of Manzanillo, Colima.
- 06:00 UTC (12:00 a.m. MDT) at The tropical depression strengthens into Tropical Storm Lidia about south-southwest of Manzanillo.
October 8
- 18:00 UTC (1:00 p.m. CDT) at Tropical Depression SixteenE forms from an area of unsettled weather about south of Zihuatanejo, Guerrero.
October 9
- 00:00 UTC (7:00 p.m. CDT, October 8) at Tropical Depression SixteenE strengthens into Tropical Storm Max about south of Zihuatanejo.
- 18:00 UTC (12:00 p.m. MDT) at Tropical Storm Lidia strengthens into a Category 1 hurricane about southwest of Puerto Vallarta, Jalisco.
- 18:00 UTC (1:00 p.m. CDT) at Tropical Storm Max reaches its peak intensity, with maximum sustained winds of and a minimum central pressure of , and simultaneously makes landfall near Puerto Vicente, Guerrero.
October 10
- 00:00 UTC (7:00 p.m. CDT, October 9) at Tropical Storm Max is last noted inland about east-northeast of Zihuatanejo with sustained winds of and a central pressure of ; it dissipates shortly thereafter.
- 18:00 UTC (12:00 p.m. MDT) at Hurricane Lidia rapidly intensifies to Category 3 strength about southwest of Puerto Vallarta, making it the sixth major hurricane of the season.
October 11
- 00:00 UTC (7:00 p.m. CDT, October 10) at Hurricane Lidia intensifies to Category 4 strength and simultaneously reaches its peak intensity, with maximum sustained winds of and a minimum central pressure of , while making landfall near Las Peñitas, Jalisco, about southwest of Puerto Vallarta.
- 06:00 UTC (1:00 a.m. CDT) at Hurricane Lidia rapidly weakens into a tropical storm inland about northeast of Puerto Vallarta.
- 12:00 UTC (7:00 a.m. CDT) at Tropical Storm Lidia degenerates into a remnant low inland over northern Mexico, about northeast of Puerto Vallarta, and later dissipates.
October 17
- 12:00 UTC (7:00 a.m. CDT) at A tropical depression forms as a result of interaction between an area of convection within the eastern Pacific monsoon trough and a Tehuantepec gap wind event about south-southwest of Manzanillo, Colima.
- 18:00 UTC (12:00 p.m. MDT) at The tropical depression strengthens into Tropical Storm Norma about south-southwest of Manzanillo.
October 18
- 18:00 UTC (12:00 p.m. MDT) at Tropical Storm Norma strengthens into a Category 1 hurricane about south-southeast of Cabo San Lucas, Baja California Sur.
October 19
- 06:00 UTC (12:00 a.m. MDT) at Hurricane Norma rapidly intensifies to Category 3 strength about south-southeast of Cabo San Lucas, making it the seventh major hurricane of the season.
- 12:00 UTC (6:00 a.m. MDT) at Hurricane Norma intensifies to Category 4 strength about south-southeast of Cabo San Lucas; it simultaneously reaches its peak intensity, with maximum sustained winds of and a minimum central pressure of .
- 18:00 UTC (12:00 p.m. MDT) at Hurricane Norma weakens to Category 3 strength about south-southeast of Cabo San Lucas.
October 21
- 12:00 UTC (6:00 a.m. MDT) at Hurricane Norma weakens to Category 2 strength about south-southwest of Cabo San Lucas.
- 18:00 UTC (12:00 p.m. MDT) at Hurricane Norma weakens to Category 1 strength about west of Cabo San Lucas.
- 20:15 UTC (2:15 p.m. MDT) at Hurricane Norma makes its first landfall about northwest of Cabo San Lucas with sustained winds of and a central pressure of .
October 22
- 00:00 UTC (6:00 p.m. MDT, October 21) at Hurricane Norma weakens into a tropical storm inland about north-northwest of Cabo San Lucas and soon emerges over the Gulf of California.
- 12:00 UTC (7:00 a.m. CDT) at A tropical depression forms from an area of low pressure about south-southeast of Acapulco, Guerrero.
- 18:00 UTC (1:00 p.m. CDT) at The tropical depression strengthens into Tropical Storm Otis about south-southeast of Acapulco.
October 23
- 10:30 UTC (4:30 a.m. MDT) at Tropical Storm Norma weakens into a tropical depression and makes its second and final landfall near El Dorado, Sinaloa, with sustained winds of and a central pressure of .
- 12:00 UTC (6:00 a.m. MDT) at Tropical Depression Norma degenerates into a remnant low inland near El Dorado, and quickly dissipates.
October 24
- 12:00 UTC (7:00 a.m. CDT) at Tropical Storm Otis strengthens into a Category 1 hurricane about south-southeast of Acapulco.
- 18:00 UTC (1:00 p.m. CDT) at Hurricane Otis rapidly intensifies to Category 3 strength about south-southeast of Acapulco, making it the eighth and final major hurricane of the season.
October 25
- 00:00 UTC (7:00 p.m. CDT, October 24) at Hurricane Otis intensifies to Category 4 strength about south-southeast of Acapulco.
- 03:00 UTC (10:00 p.m. CDT, October 24) at Hurricane Otis intensifies to Category 5 strength about south-southeast of Acapulco; it simultaneously reaches its peak intensity, with maximum sustained winds of and a minimum central pressure of , making it the strongest storm of the season.
- 06:45 UTC (1:45 a.m. CDT) at Hurricane Otis makes landfall in Acapulco with sustained winds of and a central pressure of .
- 12:00 UTC (7:00 a.m. CDT) at Hurricane Otis rapidly weakens to Category 2 strength inland about north-northwest of Acapulco.
- 18:00 UTC (1:00 p.m. CDT) at Hurricane Otis rapidly weakens into a tropical storm inland about north-northwest of Acapulco, and soon dissipates.
October 28
October 30
- 00:00 UTC (7:00 p.m. CDT, October 29) at The tropical depression strengthens into Tropical Storm Pilar about west-southwest of San Salvador.
November
November 1
- 00:00 UTC (7:00 p.m. CDT, October 31) at Tropical Storm Pilar reaches its peak intensity, with maximum sustained winds of and a minimum central pressure of , about off the coast of El Salvador.
November 5
- 18:00 UTC (11:00 a.m. MST) at Tropical Storm Pilar degenerates into a remnant low about south-southwest of the southern tip of the Baja California peninsula, and subsequently dissipates.
November 21
- 12:00 UTC (4:00 a.m. PST) at A tropical depression forms in the west-central eastern Pacific from a monsoon trough disturbance.
November 24
- 12:00 UTC (4:00 a.m. PST) at The tropical depression strengthens into Tropical Storm Ramon.
November 25
- 18:00 UTC (10:00 a.m. PST) at Tropical Storm Ramon reaches its peak intensity, with maximum sustained winds of and a minimum central pressure of , roughly west-southwest of the southern tip of the Baja California peninsula.
November 26
- 06:00 UTC (10:00 p.m. PST, November 25) at Tropical Storm Ramon degenerates into a remnant low, and subsequently dissipates.
November 30
- The 2023 Pacific hurricane season officially ends in the Eastern and Central Pacific basins.
See also
Notes
References
External links