Timeline of the 2023 Pacific hurricane season

The 2023 Pacific hurricane season was a fairly active Pacific hurricane season. In the eastern Pacific basin (east of 140°W), 17 named storms formed; 10 of those became hurricanes, and 8 further intensified into major hurricanes (category 3 or higher on the 5-level Saffir–Simpson wind speed scale). In the central Pacific basin (between 140°W 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.

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). 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.

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
 * 12:00 UTC (6:00 a.m. MDT) at 15.2°N, -104.5°W – A tropical depression forms from a tropical wave about 250 nmi south of Manzanillo, Colima.
 * 18:00 UTC (12:00 p.m. MDT) at 15.2°N, -104.5°W – The tropical depression strengthens into Tropical Storm Adrian about 250 nmi south of Manzanillo.

June 28
 * 12:00 UTC (6:00 a.m. MDT) at 15.2°N, -107.6°W – Tropical Storm Adrian strengthens into a Category 1 hurricane about 335 nmi southwest of Manzanillo.

June 29
 * 06:00 UTC (1:00 a.m. CDT) at 13.8°N, -97.3°W – Tropical Depression TwoE forms from a tropical wave about 210 nmi southeast of Acapulco, Guerrero.
 * 12:00 UTC (7:00 a.m. CDT) at 14.3°N, -98.2°W – Tropical Depression TwoE strengthens into Tropical Storm Beatriz about 180 nmi south-southeast of Acapulco.

June 30
 * 06:00 UTC (12:00 a.m. MDT) at 16.7°N, -111.4°W – Hurricane Adrian intensifies to Category 2 strength about 470 nmi west-southwest of Manzanillo.
 * 12:00 UTC (6:00 a.m. MDT) at 17°N, -111.9°W – Hurricane Adrian reaches peak intensity with maximum sustained winds of 90 kn and a minimum central pressure of 970 mbar, about 490 nmi west-southwest of Manzanillo.
 * 12:00 UTC (7:00 a.m. CDT) at 16.8°N, -101.8°W – Tropical Storm Beatriz strengthens into a Category 1 hurricane about 170 nmi southeast of Manzanillo, Colima.
 * 18:00 UTC (4:00 p.m. CDT) at 17.5°N, -102.7°W – Hurricane Beatriz reaches peak intensity with maximum sustained winds of 75 kn and a minimum central pressure of 992 mbar, about 100 nmi southeast of Manzanillo.

July
July 1
 * 00:00 UTC (6:00 p.m. MDT, June 30) at 17.6°N, -113.1°W – Hurricane Adrian weakens to Category 1 strength about 550 nmi west-southwest of Manzanillo.
 * 06:00 UTC (1:00 a.m. CDT) at 19.2°N, -104.6°W – Hurricane Beatriz weakens to a tropical storm while making landfall 5 nmi west of Manzanillo International Airport with 55 kn sustained winds, then quickly dissipates.
 * 12:00 UTC (6:00 a.m. MDT) at 18.2°N, -114.2°W – Hurricane Adrian weakens to a tropical storm about 605 nmi west of Manzanillo.

July 2
 * 12:00 UTC (5:00 a.m. PDT) at 19.4°N, -116.4°W – Tropical Storm Adrian degenerates into a remnant low about 725 nmi west-northwest of Manzanillo, and subsequently dissipates.

July 11
 * 06:00 UTC (12:00 a.m. MDT) at 11.7°N, -104.2°W – Tropical Storm Calvin forms from a disturbance in the eastern Pacific monsoon trough about 390 nmi south-southwest of Zihuatanejo, Guerrero.

July 13
 * 12:00 UTC (2:00 a.m. HST) at 12.5°N, -116.6°W – Tropical Storm Calvin strengthens into a Category 1 hurricane about 730 nmi southwest of the southern tip of the Baja California peninsula.

July 14
 * 00:00 UTC (2:00 p.m. HST, July 13) at 13°N, -119.7°W – Hurricane Calvin intensifies to Category 2 strength about 815 nmi southwest of the southern tip of the Baja California peninsula.
 * 12:00 UTC (2:00 a.m. HST) at 13.4°N, -122.6°W – Hurricane Calvin intensifies to Category 3 strength about 920 nmi southwest of the southern tip of the Baja California peninsula.
 * 18:00 UTC (8:00 a.m. HST) at 13.7°N, -123.9°W – Hurricane Calvin reaches peak intensity with maximum sustained winds of 110 kn and a minimum central pressure of 953 mbar, about 970 nmi west-southwest of the southern tip of the Baja California Peninsula.

July 15
 * 06:00 UTC (8:00 p.m. HST, July 14) at 14.4°N, -126.7°W – Hurricane Calvin weakens to Category 2 strength about 1140 nmi west-southwest of the southern tip of the Baja California peninsula.

July 16
 * 00:00 UTC (2:00 p.m. HST, July 15) at 15.2°N, -131.2°W – Hurricane Calvin weakens to Category 1 strength about 1420 nmi southeast of Ka Lae, the southernmost point of the Big Island of Hawaii.
 * 18:00 UTC (8:00 a.m. HST) at 16°N, -135.6°W – Hurricane Calvin weakens to a tropical storm about 1165 nmi southeast of Ka Lae.

July 17
 * 12:00 UTC (2:00 a.m. HST) at 16.7°N, -140.5°W – Tropical Storm Calvin enters the Central Pacific basin about 880 nmi southeast of Ka Lae.

July 19
 * 18:00 UTC (8:00 a.m. HST) at 17.9°N, -157.7°W – Tropical Storm Calvin degenerates into a remnant low about 130 nmi southwest of Ka Lae, and later dissipates.

July 20
 * 12:00 UTC (5:00 a.m. PDT) at 12.8°N, -119.6°W – Tropical Depression FourE forms.

July 22
 * 00:00 UTC (5:00 p.m. PDT, July 21) at 16°N, -126.1°W – Tropical Depression FourE degenerates into a remnant low.

July 31
 * 18:00 UTC (1:00 p.m. CDT) at 14.8°N, -103.7°W – Tropical Depression FiveE forms from a tropical wave about 250 nmi south of Manzanillo, Colima.

August
August 1
 * 09:00 UTC (3:00 a.m. MDT) at 16°N, -107.1°W – Tropical Depression FiveE strengthens into Tropical Storm Dora about 275 mi southwest of Manzanillo.

August 2
 * 03:00 UTC (5:00 p.m. HST, August 1) at 16.2°N, -111.5°W – Tropical Storm Dora strengthens into a Category 1 hurricane about 510 mi west-southwest of Manzanillo.
 * 15:00 UTC (5:00 a.m. HST) at 15.6°N, -114.2°W – Hurricane Dora intensifies to Category 2 strength about 575 mi south-southwest of the southern tip of the Baja California peninsula.

August 3
 * 03:00 UTC (5:00 p.m. HST, August 2) at 15.2°N, -116.9°W – Hurricane Dora intensifies to Category 3 strength about 700 mi southwest of the southern tip of the Baja California peninsula.
 * 09:00 UTC (11:00 p.m. HST, August 2) at 15°N, -118.5°W – Hurricane Dora intensifies to Category 4 strength about 780 mi southwest of the southern tip of the Baja California peninsula.
 * 15:00 UTC (5:00 a.m. HST) at 14.7°N, -120.1°W – Hurricane Dora weakens to Category 3 strength about 875 mi southwest of the southern tip of the Baja California peninsula.

August 4
 * 01:00 UTC (3:00 p.m. HST, August 3) at 14.2°N, -122.9°W – Hurricane Dora re-intensifies to Category 4 strength about 1035 mi southwest of the southern tip of the Baja California peninsula.
 * 15:00 UTC (5:00 a.m. HST) at 14°N, -126.9°W – Hurricane Dora weakens to Category 3 strength about 1270 mi west-southwest of the southern tip of the Baja California peninsula.
 * 21:00 UTC (11:00 a.m. HST) at 13.8°N, -128.5°W – Hurricane Dora weakens to Category 2 strength about 1370 mi west-southwest of the southern tip of the Baja California peninsula.

August 5
 * 12:00 UTC (6:00 a.m. MDT) at 17.9°N, -106.3°W – Tropical Depression SixE forms from a tropical wave.
 * 15:00 UTC (5:00 a.m. HST) at 13.3°N, -133.3°W – Hurricane Dora re-intensifies to Category 3 strength about 1535 mi east of Ka Lae, Hawaii.
 * 18:00 UTC (12:00 p.m. MDT) at 18.7°N, -107.3°W – Tropical Depression SixE strengthens into Tropical Storm Eugene.
 * 21:00 UTC (11:00 a.m. HST) at 13.3°N, -134.8°W – Hurricane Dora further re-intensifies to Category 4 strength about 1440 mi east-southeast of Ka Lae.

August 6
 * 03:00 UTC (5:00 p.m. HST, August 5) at 13.2°N, -136.5°W – Hurricane Dora reaches peak intensity with maximum sustained winds of 125 kn and a minimum central pressure of 942 mbar, about 1335 mi east-southeast of Ka Lae.
 * 12:00 UTC (6:00 a.m. MDT) at 21.3°N, -110.6°W – Tropical Storm Eugene reaches peak intensity with maximum sustained winds of 60 kn and a minimum central pressure of 992 mbar.
 * 15:00 UTC (5:00 a.m. HST) at 13°N, -140.1°W – Hurricane Dora enters the Central Pacific basin about 1115 mi east-southeast of Ka Lae.

August 7
 * 12:00 UTC (11:00 a.m. PDT) at 24.3°N, -124.5°W – Tropical Storm Eugene degenerates into a remnant low.

August 10
 * 12:00 UTC (2:00 a.m. HST) at 12.1°N, -170.5°W – Hurricane Dora weakens to Category 3 strength south of Johnston Atoll.

August 11
 * 18:00 UTC (8:00 a.m. HST) at 14.8°N, -178.6°W – Hurricane Dora weakens to Category 2 strength.

August 12
 * 00:00 UTC (09:00 JST) at 15.6°N, -179.8°W – 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 14.2°N, -111.8°W – Tropical Depression SevenE forms from a tropical wave.

August 13
 * 00:00 UTC (6:00 p.m. MDT, August 12) at 15°N, -113.6°W – Tropical Depression SevenE strengthens into Tropical Storm Fernanda.
 * 18:00 UTC (11:00 p.m. PDT) at 15.3°N, 116.1°W – Tropical Storm Fernanda strengthens into a Category 1 hurricane.

August 14
 * 00:00 UTC (2:00 p.m. HST, August 13) at 15.4°N, -116.8°W – Hurricane Fernanda intensifies to Category 2 strength.
 * 00:00 UTC (2:00 p.m. HST, August 13) at 11.3°N, -138.2°W – Tropical Depression EightE forms.
 * 06:00 UTC (8:00 p.m. HST, August 13) at 15.5°N, -117.4°W – Hurricane Fernanda intensifies to Category 2 strength.
 * 06:00 UTC (8:00 p.m. HST, August 13) at 11.3°N, -139.2°W – Tropical Depression EightE strengthens into Tropical Storm Greg, then later enters the Central Pacific basin.
 * 06:00 UTC (8:00 p.m. HST, August 13) at 15.5°N, -117.4°W – Hurricane Fernanda intensifies to Category 3 strength.
 * 12:00 UTC (2:00 a.m. HST) at 15.6°N, -118°W – Hurricane Fernanda intensifies to Category 4 strength and simultaneously reaches peak intensity with maximum sustained winds of 115 kn and a minimum central pressure of 949 mbar.

August 15
 * 00:00 UTC (2:00 p.m. HST, August 14) at 16.5°N, -119.4°W – Hurricane Fernanda weakens to Category 3 strength.
 * 06:00 UTC (8:00 p.m. HST, August 14) at 11.1°N, -144°W – Tropical Storm Greg reaches peak intensity with maximum sustained winds of 45 kn and a minimum central pressure of 1000 mbar southeast of Hilo, Hawaii.
 * 12:00 UTC (2:00 a.m. HST) at 16.8°N, -121.2°W – Hurricane Fernanda weakens to Category 2 strength.

August 16
 * 06:00 UTC (8:00 p.m. HST, August 15) at 17.2°N, -124.8°W – Hurricane Fernanda weakens to Category 1 strength.
 * 06:00 UTC (1:00 a.m. CDT) at 11.9°N, -100.8°W – A tropical depression forms from a tropical wave about 300 nmi south of Acapulco, Guerrero.
 * 12:00 UTC (2:00 a.m. HST) at 17°N, -126.1°W – Hurricane Fernanda weakens to a tropical storm.
 * 12:00 UTC (7:00 a.m. CDT) at 12.6°N, -102.3°W – The tropical depression strengthens into Tropical Storm Hilary about 290 nmi southwest of Acapulco.

August 17
 * 06:00 UTC (9:00 p.m. HST, August 16) at 16.5°N, -129.9°W – Tropical Storm Fernanda degenerates into a remnant low, and subsequently dissipates.
 * 12:00 UTC (6:00 a.m. MDT) at 15.2°N, -107.2°W – Tropical Storm Hilary strengthens into a Category 1 hurricane about 285 nmi southwest of Manzanillo, Colima.
 * 18:00 UTC (12:00 p.m. MDT) at 15.8°N, -108.4°W – Hurricane Hilary intensifies to Category 2 strength.
 * 18:00 UTC (8:00 a.m. HST) at 12.2°N, -156.3°W – Tropical Storm Greg weakens to 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, 2023) at 16.4°N, -109.5°W – Hurricane Hilary intensifies to Category 3 strength.
 * 06:00 UTC (12:00 a.m. MDT) at 16.8°N, -110.4°W – Hurricane Hilary intensifies to Category 4 strength and simultaneously reaches peak intensity with maximum sustained winds of 120 kn and a minimum central pressure of 940 mbar, about 375 nmi west-southwest of Manzanillo.
 * 18:00 UTC (12:00 p.m. MDT) at 18.2°N, -111.9°W – Hurricane Hilary weakens to Category 3 strength about 60 mi (110 km) west-southwest of Socorro Island.

August 19
 * 00:00 UTC (6:00 p.m. MDT, August 18) at 19.2°N, -113.5°W – Hurricane Hilary re-strengthens to Category 4 strength.
 * 12:00 UTC (6:00 a.m. MDT) at 22.9°N, -113.9°W – Hurricane Hilary weakens to Category 3 strength.
 * 18:00 UTC (12:00 p.m. MDT) at 22.9°N, -113.9°W – Hurricane Hilary weakens to Category 2 strength about 350 mi (570 km) south-southeast of Punta Eugenia, Baja California Sur.

August 20
 * 00:00 UTC (6:00 p.m. MDT, August 19) at 24.3°N, -115.3°W – Hurricane Hilary weakens to Category 1 strength.
 * 12:00 UTC (5:00 a.m. PDT) at 28.1°N, -115.3°W – Hurricane Hilary weakens to a tropical storm near Isla Cedros, about 20 nmi northwest of Punta Eugenia.
 * 17:00 UTC (10:00 a.m. PDT) at 29.7°N, -115.6°W – Tropical Storm Hilary makes landfall with sustained winds of 50 kn near San Fernando, Baja California.
 * 21:00 UTC (2:00 p.m. PDT) at 31.4°N, -115.6°W – Tropical Storm Hilary degenerates to a post-tropical cyclone inland over northern Baja California, and is soon absorbed by a non-tropical low.

August 26
 * 18:00 UTC (8:00 a.m. HST) at 15.5°N, -117.9°W – Tropical Depression TenE forms from a tropical wave in the west-central eastern Pacific.

August 27
 * 12:00 UTC (2:00 a.m. HST) at 16.6°N, -120°W – Tropical Depression TenE strengthens into Tropical Storm Irwin.

August 29
 * 00:00 UTC (2:00 p.m. HST, August 28) at 19.1°N, -125°W – Tropical Storm Irwin reaches peak intensity with maximum sustained winds of 40 kn and a minimum central pressure of 998 mbar.
 * 12:00 UTC (2:00 a.m. HST) at 19.7°N, -128.1°W – Tropical Storm Irwin degenerates to a remnant low, and subsequently dissipates.

September
September 4
 * 18:00 UTC (1:00 p.m. CDT) at 12.3°N, -103.8°W – Tropical Depression ElevenE forms over the eastern Pacific from a tropical wave.

September 5
 * 06:00 UTC (12:00 a.m. MDT) at 12.4°N, -105.9°W – Tropical Depression ElevenE 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 13.3°N, -109°W – Tropical Storm Jova strengthens into a Category 1 hurricane.
 * 12:00 UTC (6:00 a.m. MDT) at 13.9°N, -110°W – Hurricane Jova intensifies to Category 2 strength.
 * 18:00 UTC (12:00 p.m. MDT) at 14.6°N, -111.1°W – Hurricane Jova intensifies to Category 4 strength.

September 7
 * 00:00 UTC (6:00 p.m. MDT, September 6) at 15.3°N, -112.4°W – Hurricane Jova intensifies to Category 5 strength and simultaneously reaches peak intensity with maximum sustained winds of 140 kn and minimum central pressure of 926 mbar.
 * 12:00 UTC (6:00 a.m. PDT) at 16.8°N, -115°W – Hurricane Jova weakens to Category 4 strength.

September 8
 * 06:00 UTC (11:00 p.m. PDT, September 7) at 18.8°N, -119.1°W – Hurricane Jova weakens to Category 3 strength.
 * 12:00 UTC (5:00 a.m. PDT) at 19.5°N, -120.6°W – Hurricane Jova weakens to Category 2 strength.
 * 18:00 UTC (11:00 a.m. PDT) at 20.1°N, -121.9°W – Hurricane Jova weakens to Category 1 strength.

September 9
 * 06:00 UTC (11:00 p.m. PDT, September 8) at 21.2°N, -124.2°W – Hurricane Jova weakens to a tropical storm.

September 10
 * 06:00 UTC (11:00 p.m. PDT, September 9) at 23.8°N, -126.6°W – Tropical Storm Jova degenerates into a remnant low.

September 15
 * 12:00 UTC (2:00 a.m. HST) at 15°N, -135.3°W – Tropical Depression TwelveE forms from a tropical wave.

September 18
 * 06:00 UTC (8:00 p.m. HST, September 17) at 12.3°N, -146.5°W – Tropical Depression TwelveE degenerates to 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 14.4°N, -117.5°W – Tropical Depression ThirteenE forms southwest of the southern tip of the Baja California peninsula.
 * 12:00 UTC (5:00 a.m. PDT) at 14.7°N, -118.8°W – Tropical Depression ThirteenE 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 16.3°N, -124.5°W – Tropical Storm Kenneth reaches peak intensity with maximum sustained winds of 45 kn and a minimum central pressure of 1000 mbar, west-southwest of the southern tip of the Baja California peninsula.

September 22
 * 06:00 UTC (11:00 p.m. PDT, September 21) at 18.8°N, -126.1°W – Tropical Storm Kenneth weakens to a tropical depression west of the southern tip of the Baja California peninsula.
 * 12:00 UTC (5:00 a.m. PDT) at 20°N, -125.9°W – Tropical Depression Kenneth degenerates to 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 13.6°N, -118.5°W – Tropical Depression FourteenE forms from a tropical wave about 750 nmi southwest of the southern tip of the Baja California peninsula.

September 25
 * 00:00 UTC (5:00 p.m. PDT, September 24) at 15.1°N, -125.9°W – Tropical Depression FourteenE degenerates into a remnant low about 1190 nmi southwest of the southern tip of the Baja California peninsula.

October
October 3
 * 00:00 UTC (6:00 p.m. MDT, October 2) at 11.2°N, -105.8°W – A tropical depression forms from a tropical wave about 500 nmi south of Manzanillo, Colima.
 * 06:00 UTC (12:00 a.m. MDT) at 11.5°N, -106.4°W – The tropical depression strengthens into Tropical Storm Lidia about 460 nmi south of Manzanillo.

October 8
 * 18:00 UTC (1:00 p.m. CDT) at 15.5°N, -101.5°W – Tropical Depression SixteenE forms about 125 nmi south of Zihuatanejo, Guerrero.

October 9
 * 00:00 UTC (7:00 p.m. CDT, October 8) at 16.1°N, -101.6°W – Tropical Depression SixteenE strengthens into Tropical Storm Max about 90 nmi south of Zihuatanejo.
 * 18:00 UTC (12:00 p.m. MDT) at 17.8°N, -111.4°W – Tropical Storm Lidia strengthens into a Category 1 hurricane about 385 nmi southwest of Puerto Vallarta, Jalisco.
 * 18:00 UTC (1:00 p.m. CDT) at 17.3°N, -101.1°W – Tropical Storm Max reaches peak intensity with maximum sustained winds of 60 kn and a minimum central pressure of 990 mbar, and simultaneously makes landfall near Puerto Vicente, Guerrero.

October 10
 * 00:00 UTC (7:00 p.m. CDT, October 9) at 17.9°N, -100.8°W – Tropical Storm Max weakens inland to 35 kn and soon dissipates.
 * 18:00 UTC (12:00 p.m. MDT) at 19.3°N, -107.1°W – Hurricane Lidia intensifies to Category 3 strength about 130 nmi southwest of Puerto Vallarta.

October 11
 * 00:00 UTC (6:00 p.m. MDT, October 10) at 20.1°N, -105.5°W – Hurricane Lidia intensifies to Category 4 strength and simultaneously reaches peak intensity with maximum sustained winds of 120 kn and a minimum central pressure of 942 mbar, together with making landfall near Las Peñitas, Jalisco, about 35 nmi southwest of Puerto Vallarta.
 * 06:00 UTC (1:00 a.m. CDT) at 21.7°N, -103.5°W – Hurricane Lidia weakens to a tropical storm inland about 85 mi north of Guadalajara, Jalisco.
 * 12:00 UTC (7:00 a.m. CDT) at 24.5°N, -100.5°W – Tropical Storm Lidia degenerates into a remnant low inland over Northern Mexico, and later dissipates.

October 17
 * 12:00 UTC (6:00 a.m. MDT) at 12.7°N, -105.8°W – 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 400 nmi south-southwest of Manzanillo, Colima.
 * 18:00 UTC (12:00 p.m. MDT) at 12.9°N, -106.9°W – The tropical depression strengthens into Tropical Storm Norma about 405 nmi south-southwest of Manzanillo.

October 18
 * 18:00 UTC (12:00 p.m. MDT) at 15.3°N, -107.9°W – Tropical Storm Norma strengthens into a Category 1 hurricane about 450 nmi south-southeast of Cabo San Lucas, Baja California Sur.

October 19
 * 06:00 UTC (12:00 a.m. MDT) at 16.4°N, -107.8°W – Hurricane Norma intensifies to Category 3 strength about 385 nmi south-southeast of Cabo San Lucas.
 * 12:00 UTC (6:00 a.m. MDT) at 16.9°N, -107.7°W – Hurricane Norma intensifies to Category 4 strength and simultaneously reaches peak intensity with maximum sustained winds of 115 kn and a minimum central pressure of 939 mbar about 350 nmi south-southeast of Cabo San Lucas.
 * 18:00 UTC (12:00 p.m. MDT) at 17.3°N, -108°W – Hurricane Norma weakens to Category 3 strength about 320 nmi south-southeast of Cabo San Lucas.

October 21
 * 12:00 UTC (6:00 a.m. MDT) at 22.3°N, -110.2°W – Hurricane Norma weakens to Category 2 strength about 45 nmi south-southwest of Cabo San Lucas.
 * 18:00 UTC (12:00 p.m. MDT) at 22.9°N, -110.3°W – Hurricane Norma weakens to Category 1 strength about 20 nmi west of Cabo San Lucas.
 * 20:15 UTC (2:15 p.m. MDT) at 23°N, -110.1°W – Hurricane Norma makes landfall with sustained winds of 70 kn about 10 nmi west of Cabo San Lucas.

October 22
 * 00:00 UTC (6:00 p.m. MDT October 21) at 23.6°N, -110.1°W – Hurricane Norma weakens to a tropical storm inland about 40 nmi west-northwest of Cabo San Lucas.
 * 12:00 UTC (7:00 a.m. CDT) at 9.8°N, -96.7°W – Tropical Depression EighteenE forms about 465 nmi south-southeast of Acapulco, Guerrero.
 * 21:00 UTC (4:00 p.m. CDT) at 10.2°N, -96.9°W – Tropical Depression EighteenE strengthens into Tropical Storm Otis about 440 nmi south-southeast of Acapulco.

October 23
 * 10:30 UTC (4:30 a.m. MDT) at 24.7°N, -108°W – Tropical Storm Norma weakens to a tropical depression and makes landfall with sustained winds of 30 kn near El Dorado, Sinaloa.
 * 12:00 UTC (6:00 a.m. MDT) at 24.7°N, -107.9°W – 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 14.2°N, -98.9°W – Tropical Storm Otis strengthens into a Category 1 hurricane about 165 nmi south-southeast of Acapulco.
 * 18:00 UTC (1:00 p.m. CDT) at 14.9°N, -99.4°W – Hurricane Otis intensifies to Category 3 strength about 115 nmi south-southeast of Acapulco.

October 25
 * 00:00 UTC (7:00 p.m. CDT October 24) at 15.7°N, -99.6°W – Hurricane Otis intensifies to Category 4 strength about 75 nmi south-southeast of Acapulco.
 * 03:00 UTC (10:00 p.m. CDT October 24) at 16.1°N, -99.7°W – Hurricane Otis intensifies to Category 5 strength and simultaneously reaches peak intensity with maximum sustained winds of 145 kn and a minimum central pressure of 922 mbar about 50 nmi south-southeast of Acapulco.
 * 06:45 UTC (1:45 a.m. CDT) at 16.8°N, -99.9°W – Hurricane Otis makes landfall with sustained winds of 140 kn in Acapulco.
 * 12:00 UTC (7:00 a.m. CDT) at 17.7°N, -100.3°W – Hurricane Otis weakens to Category 2 strength inland about 50 nmi north-northwest of Acapulco.
 * 18:00 UTC (1:00 p.m. CDT) at 18.6°N, -100.7°W – Hurricane Otis weakens to tropical storm strength inland about 110 nmi north-northwest of Acapulco, and soon dissipates.

October 28
 * 12:00 UTC (7:00 a.m. CDT) at 10.4°N, -92.6°W – Tropical Depression NineteenE forms from a wave containing the remnants of Atlantic basin Tropical Depression Twenty-One about 250 nmi southwest of San Salvador, El Salvador.

October 30
 * 00:00 UTC (7:00 p.m. CDT, October 29) at 10.8°N, -92.3°W – Tropical Depression NineteenE strengthens into Tropical Storm Pilar about 220 nmi west-southwest of San Salvador.

November
November 1
 * 00:00 UTC (7:00 p.m. CDT, October 31) at 11.7°N, -89.4°W – Tropical Storm Pilar reaches peak intensity with maximum sustained winds of 55 kn and a minimum central pressure of 995 mbar, about 80 nmi offshore of El Salvador.

November 5
 * 18:00 UTC (11:00 a.m. MST) at 10.5°N, -113.9°W – Tropical Storm Pilar degenerates into a remnant low far southwest of the southern tip of the Baja California peninsula, and subsequently dissipates.

November 21
 * 12:00 UTC (4:00 a.m. PST) at 10.1°N, -119.8°W – Tropical Depression TwentyE forms in the west-central eastern Pacific from a monsoon trough disturbance.

November 24
 * 12:00 UTC (4:00 a.m. PST) at 13.1°N, -122.6°W – Tropical Depression TwentyE strengthens into Tropical Storm Ramon.

November 25
 * 18:00 UTC (10:00 a.m. PST) at 15°N, -122.9°W – Tropical Storm Ramon reaches peak intensity with maximum sustained winds of 40 kn and a minimum central pressure of 1002 mbar, roughly 1000 mi west-southwest of the southern tip of the Baja California peninsula.

November 26
 * 06:00 UTC (10:00 p.m. PST, November 25) at 14.5°N, -123.1°W – 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.