Timeline of the 2004 Pacific hurricane season explained

The 2004 Pacific hurricane season consisted of the events that occurred in the annual cycle of tropical cyclone formation over the Pacific Ocean north of the equator and east of the International Date Line. The official bounds of each Pacific hurricane season are dates that conventionally delineate the period each year during which tropical cyclones tend to form in the basin according to the National Hurricane Center (NHC), beginning on May 15 in the Eastern Pacific proper (east of 140°W) and June 1 in the Central Pacific (140°W to the International Date Line), and ending on November 30 in both areas. However, tropical cyclogenesis is possible at any time of year.^[1] The first tropical cyclone of the season, Tropical Storm Agatha, developed on May 22; the final, Tropical Depression, dissipated on October 26.

Activity during the 2004 season was below average. A total of seventeen tropical depressions formed, with twelve going on to become named tropical storms. Six storms became hurricanes, of which three further intensified into major hurricanes.^{[2] [3]} Persisting throughout the season was an area of atmospheric and oceanic conditions hostile to tropical cyclones, including below-average sea surface temperatures and a stable air mass. A strong ridge over Mexico frequently steered systems toward this area, limiting their development.^[3] The season's general lack of activity was reflected by an overall Accumulated Cyclone Energy index of 71.1 units, which is the seventh-lowest value on record for a Pacific hurricane season as of December 2024.^[4]

Impacts on land were unusually light during the season, largely on account of the aforementioned ridge steering the vast majority of tropical cyclones out to sea. No systems caused any confirmed fatalities,^[3] although Hurricane Javier in September caused three fishermen to go missing off the coast of Oaxaca.^[5] Javier and made landfall as tropical depressions in northwestern Mexico, where they caused minor flooding; also generated locally strong winds and a possible tornado.^{[6] [7]} The remnants of both systems produced heavy rainfall in portions of the western United States.^{[7] [8]} Hurricane Howard in early September washed out roads in western portions of the Baja California peninsula and prompted water rescues in California due to high surf.^{[9] [10]} In mid-October, Tropical Storm Lester caused rainfall of up to in southern Mexico when it passed close to the coast.^[11]

Prior to 2015, two time zones were utilized in the Eastern Pacific basin: Pacific east of 140°W, and Hawaii−Aleutian from 140°W to the International Date Line.^{[12] [13]} For convenience, each event is listed in Coordinated Universal Time (UTC) first, using the 24-hour clock (where 00:00 = midnight UTC),^[14] with the respective local time included in parentheses. Figures for maximum sustained winds and position estimates are rounded to the nearest five units (knots, miles, or kilometers) and averaged over one minute, 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. This timeline documents the formation of tropical cyclones as well as the strengthening, weakening, landfalls, extratropical transitions, and dissipations during the season. It also includes information that was not released while the storm was active, meaning that data from post-storm reviews by the National Hurricane Center and the Central Pacific Hurricane Center is included.

Timeline of events

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May

May 15

• The 2004 Eastern Pacific hurricane season officially begins.^[1]

May 22

• 00:00 UTC (5:00 p.m. PDT, May 21) at 14.7°N -107.6°WTropical Depression forms from an area of unsettled weather about 585 mi (945 km) south-southeast of Cabo San Lucas, Baja California Sur.^[15]
• 12:00 UTC (5:00 a.m. PDT) at 16°N -109.1°WTropical Depression strengthens into Tropical Storm Agatha about 480 mi (770 km) south of Cabo San Lucas, Baja California Sur.^[15]

May 23

• 00:00 UTC (5:00 p.m. PDT, May 22) at 17.1°N -109.9°WTropical Storm Agatha attains peak winds of 60 mph (95 km/h) and a minimum barometric pressure of 997abbr=onNaNabbr=on about 395 mi (640 km) south of Cabo San Lucas, Baja California Sur.^[15]

May 24

• 00:00 UTC (5:00 p.m. PDT, May 23) at 18.5°N -110.7°WTropical Storm Agatha weakens into a tropical depression about 305 mi (490 km) south of Cabo San Lucas, Baja California Sur.^[15]
• 12:00 UTC (5:00 a.m. PDT) at 18.9°N -110.9°WTropical Depression Agatha degenerates into a remnant low about 280 mi (455 km) south of Cabo San Lucas, Baja California Sur.

June

• No tropical cyclones were active in June.

June 1

• The 2004 Central Pacific hurricane season officially begins.^[1]

July

July 2

• 12:00 UTC (5:00 a.m. PDT) at 16.2°N -119.2°WTropical Depression forms from a tropical wave about 760 mi (1,225 km) southwest of the southern tip of the Baja California peninsula.^[16]

July 3

• 00:00 UTC (5:00 p.m. PDT, July 2) at 17.1°N -120.8°WTropical Depression attains peak winds of 35 mph (55 km/h) and a minimum barometric pressure of 1007abbr=onNaNabbr=on about 805 mi (1,295 km) west-southwest of the southern tip of the Baja California peninsula.

July 4

• 00:00 UTC (5:00 p.m. PDT, July 3) at 17.5°N -125°WTropical Depression degenerates into a remnant low about 1,040 mi (1,675 km) west-southwest of the southern tip of the Baja California peninsula.^[16]
• 00:00 UTC (2:00 p.m. HST, July 3) at 6°N -157°WTropical Depression forms from an Intertropical Convergence Zone (ITCZ) disturbance about 1,130 mi (1,815 km) southeast of Johnston Atoll.
• 18:00 UTC (8:00 a.m. HST) at 6.7°N -162.7°WTropical Depression attains a minimum barometric pressure of 1007abbr=onNaNabbr=on about 835 mi (1,345 km) southeast of Johnston Atoll.^[2]

July 5

• 00:00 UTC (2:00 p.m. HST, July 4) at 6.8°N -164.7°WTropical Depression attains peak winds of 30 mph (45 km/h) about 760 mi (1,225 km) south-southeast of Johnston Atoll.^[2]

July 6

• 00:00 UTC (2:00 p.m. HST, July 5) at 7°N -167.9°WTropical Depression is last noted as a tropical cyclone about 680 mi (1,095 km) south of Johnston Atoll; it dissipates shortly thereafter.^[2]

July 12

• 12:00 UTC (5:00 a.m. PDT) at 14.6°N -105.5°WA tropical depression forms from a tropical wave about 640 mi (1,030 km) south-southeast of Cabo San Lucas, Baja California Sur.^[17]
• 18:00 UTC (11:00 a.m. PDT) at 15.5°N -106.8°WThe tropical depression strengthens into Tropical Storm Blas about 545 mi (880 km) south-southeast of Cabo San Lucas, Baja California Sur.^[17]

July 13

• 12:00 UTC (5:00 a.m. PDT) at 18.4°N -110.8°WTropical Storm Blas attains peak winds of 65 mph (100 km/h) and a minimum barometric pressure of 991abbr=onNaNabbr=on about 315 mi (510 km) south of Cabo San Lucas, Baja California Sur.^[17]

July 14

• 18:00 UTC (11:00 a.m. PDT) at 22.5°N -117.9°WTropical Storm Blas weakens into a tropical depression about 505 mi (815 km) west of Cabo San Lucas, Baja California Sur.^[17]

July 15

• 06:00 UTC (11:00 p.m. PDT, July 14) at 23.2°N -120.4°WTropical Depression Blas degenerates into a remnant low about 660 mi (1,065 km) west of Cabo San Lucas, Baja California Sur.^[17]

July 19

• 00:00 UTC (5:00 p.m. PDT, July 18) at 14.4°N -113.1°WA tropical depression forms from a tropical wave about 620 mi (1,000 km) south-southwest of the southern tip of the Baja California peninsula.^[18]
• 12:00 UTC (5:00 a.m. PDT) at 14.7°N -114.9°WThe tropical depression strengthens into Tropical Storm Celia about 650 mi (1,045 km) south-southwest of the southern tip of the Baja California peninsula.^[18]

July 22

• 00:00 UTC (5:00 p.m. PDT, July 21) at 16.3°N -121°WTropical Storm Celia strengthens into a Category 1 hurricane about 850 mi (1,370 km) west-southwest of the southern tip of the Baja California peninsula.^[18]
• 06:00 UTC (11:00 p.m. PDT, July 21) at 16.3°N -121.5°WHurricane Celia attains peak winds of 85 mph (140 km/h) and a minimum barometric pressure of 981abbr=onNaNabbr=on about 875 mi (1,410 km) west-southwest of the southern tip of the Baja California peninsula.^[18]
• 18:00 UTC (11:00 a.m. PDT) at 16.3°N -123°WHurricane Celia weakens into a tropical storm about 960 mi (1,545 km) west-southwest of the southern tip of the Baja California peninsula.^[18]

July 24

• 12:00 UTC (5:00 a.m. PDT) at 17°N -128.4°WTropical Storm Celia weakens into a tropical depression about 1,260 mi (2,030 km) west-southwest of the southern tip of the Baja California peninsula.^[18]

July 26

• 00:00 UTC (5:00 p.m. PDT, July 25) at 19.1°N -135.2°WTropical Depression Celia degenerates into a remnant low about 1,645 mi (2,650 km) west of the southern tip of the Baja California peninsula.^[18]
• 12:00 UTC (5:00 a.m. PDT) at 12.2°N -112.8°WTropical Depression forms from a tropical wave about 760 mi (1,225 km) south-southwest of Cabo San Lucas, Baja California Sur.^{[2] [19]}

July 27

• 00:00 UTC (5:00 p.m. PDT, July 26) at 12.5°N -115.5°WTropical Depression strengthens into Tropical Storm Darby about 805 mi (1,295 km) south-southwest of Cabo San Lucas, Baja California Sur.^{[2] [19]}

July 28

• 00:00 UTC (5:00 p.m. PDT, July 27) at 14.1°N -120.5°WTropical Storm Darby strengthens into a Category 1 hurricane about 915 mi (1,475 km) southwest of Cabo San Lucas, Baja California Sur.^[19]
• 18:00 UTC (11:00 a.m. PDT) at 15.8°N -124°WHurricane Darby strengthens to Category 2 intensity about 1,035 mi (1,670 km) west-southwest of Cabo San Lucas, Baja California Sur.^[19]

July 29

• 06:00 UTC (11:00 p.m. PDT, July 28) at 16.8°N -126.2°WHurricane Darby strengthens to Category 3 intensity about 1,135 mi (1,825 km) west-southwest of Cabo San Lucas, Baja California Sur. This makes it the first Pacific major hurricane since Hurricane Kenna in 2002. It simultaneously attains peak winds of 120 mph (195 km/h) and a minimum barometric pressure of 957abbr=onNaNabbr=on.^{[19] [20]}
• 18:00 UTC (11:00 a.m. PDT) at 17.8°N -128.2°WHurricane Darby weakens to Category 2 intensity about 1,230 mi (1,985 km) west-southwest of Cabo San Lucas, Baja California Sur.^[19]

July 30

• 00:00 UTC (5:00 p.m. PDT, July 29) at 18.1°N -129.2°WHurricane Darby weakens to Category 1 intensity about 1,290 mi (2,075 km) west-southwest of Cabo San Lucas, Baja California Sur.^[19]
• 12:00 UTC (5:00 a.m. PDT) at 18.4°N -131.7°WHurricane Darby weakens into a tropical storm about 1,440 mi (2,315 km) west-southwest of Cabo San Lucas, Baja California Sur.^[19]

July 31

• 12:00 UTC (5:00 a.m. PDT) at 18.8°N -137.3°WTropical Storm Darby weakens into a tropical depression about 1,785 mi (2,870 km) west of Cabo San Lucas, Baja California Sur.^[19]

August

August 1

• 00:00 UTC (2:00 p.m. HST, July 31) at 19°N -140.4°WTropical Depression Darby crosses 140°W, leaving the jurisdiction of the National Hurricane Center (NHC) and entering the Central Pacific Hurricane Center's (CPHC) area of responsibility.^{[2] [19]}
• 06:00 UTC (11:00 p.m. PDT, July 31) at 12.4°N -126.1°WTropical Depression forms about 1,285 mi (2,065 km) southwest of Cabo San Lucas, Baja California Sur. It simultaneously attains peak winds of 30 mph (45 km/h) and a minimum barometric pressure of 1008abbr=onNaNabbr=on.^{[20] [21]}
• 12:00 UTC (2:00 a.m. HST) at 19.5°N -143.8°WTropical Depression Darby degenerates into a remnant low about 920 mi (1,480 km) east of Honolulu, Hawaii.

August 2

• 00:00 UTC (5:00 p.m. PDT, August 1) at 12°N -127.8°WTropical Depression is last noted as a tropical cyclone about 1,395 mi (2,240 km) southwest of Cabo San Lucas, Baja California Sur; it dissipates six hours later.^{[20] [21]}

August 19

• 06:00 UTC (11:00 p.m. PDT, August 18) at 11.6°N -131.8°WA tropical depression forms from an area of unsettled weather about 1,645 mi (2,650 km) east-southeast of Hilo, Hawaii.^[22]

August 20

• 06:00 UTC (11:00 p.m. PDT, August 19) at 13.6°N -136.3°WThe aforementioned tropical depression strengthens into Tropical Storm Estelle about 1,310 mi (2,115 km) east-southeast of Hilo, Hawaii.^[22]

August 21

• 06:00 UTC (8:00 p.m. HST, August 20) at 14.6°N -140.1°WTropical Storm Estelle crosses 140°W, leaving the jurisdiction of the NHC and entering the CPHC's area of responsibility.^{[2] [22]}
• 12:00 UTC (2:00 a.m. HST) at 15°N -140.8°WTropical Storm Estelle attains peak winds of 70 mph (110 km/h) and a minimum barometric pressure of 989abbr=onNaNabbr=on about 995 mi (1,605 km) east-southeast of Hilo, Hawaii.^{[2] [22]}

August 23

• 00:00 UTC (2:00 p.m. HST, August 22) at 16.4°N -143.4°WTropical Storm Estelle weakens into a tropical depression about 800 mi (1,290 km) east-southeast of Hilo, Hawaii.^{[2] [22]}
• 06:00 UTC (11:00 p.m. PDT, August 22) at 16.7°N -110.2°WA tropical depression forms from the remnants of Atlantic Tropical Storm Earl about 425 mi (685 km) south of Cabo San Lucas, Baja California Sur.^[23]
• 12:00 UTC (5:00 a.m. PDT) at 17.3°N -111.2°WThe tropical depression strengthens into Tropical Storm Frank about 390 mi (630 km) south of Cabo San Lucas, Baja California Sur.^[23]

• 18:00 UTC (11:00 a.m. PDT) at 18°N -112°WTropical Storm Frank strengthens into a Category 1 hurricane about 370 mi (595 km) south-southwest of Cabo San Lucas, Baja California Sur.^[23]
• 18:00 UTC (11:00 a.m. PDT) at 17.3°N -123.6°WTropical Depression forms from a tropical wave about 965 mi (1,555 km) west-southwest of Cabo San Lucas, Baja California Sur.^[24]

August 24

• 00:00 UTC (5:00 p.m. PDT, August 23) at 17.8°N -123.7°WTropical Depression attains peak winds of 35 mph (55 km/h) about 955 mi (1,540 km) west-southwest of Cabo San Lucas, Baja California Sur.^[24]
• 06:00 UTC (11:00 p.m. PDT, August 23) at 19.5°N -113.7°WHurricane Frank attains peak winds of 85 mph (140 km/h) and a minimum barometric pressure of 979abbr=onNaNabbr=on about 335 mi (535 km) southwest of Cabo San Lucas, Baja California Sur.^[23]
• 06:00 UTC (11:00 p.m. PDT, August 23) at 18.2°N -123.9°WTropical Depression attains a minimum barometric pressure of 1005abbr=onNaNabbr=on about 955 mi (1,540 km) west-southwest of Cabo San Lucas, Baja California Sur.^[24]
• 18:00 UTC (8:00 a.m. HST) at 15°N -150.5°WTropical Depression Estelle degenerates into a remnant low about 445 mi (715 km) southeast of Hilo, Hawaii.^{[2] [22]}

August 25

• 06:00 UTC (11:00 p.m. PDT, August 24) at 21.6°N -116.2°WHurricane Frank weakens into a tropical storm about 410 mi (660 km) west-southwest of Cabo San Lucas, Baja California Sur.^[23]

August 26

• 00:00 UTC (5:00 p.m. PDT, August 25) at 22.1°N -118.3°WTropical Storm Frank weakens into a tropical depression about 535 mi (860 km) west of Cabo San Lucas, Baja California Sur.^[23]
• 06:00 UTC (11:00 p.m. PDT, August 25) at 22.3°N -119°WTropical Depression Frank degenerates into a remnant low about 575 mi (925 km) west of Cabo San Lucas, Baja California Sur.^[23]
• 12:00 UTC (5:00 a.m. PDT) at 14.7°N -106°WA tropical depression forms from a tropical wave about 620 mi (1,000 km) south-southeast of the southern tip of the Baja California peninsula.^[25]
• 18:00 UTC (11:00 a.m. PDT) at 19.9°N -131.9°WTropical Depression degenerates into a remnant low about 1,420 mi (2,290 km) west of Cabo San Lucas, Baja California Sur.^[24]
• 18:00 UTC (11:00 a.m. PDT) at 15.6°N -107°WThe tropical depression that had formed six hours earlier strengthens into Tropical Storm Georgette about 540 mi (870 km) south-southeast of the southern tip of the Baja California peninsula.^[25]

August 27

• 12:00 UTC (5:00 a.m. PDT) at 17.9°N -111.3°WTropical Storm Georgette attains peak winds of 65 mph (100 km/h) and a minimum barometric pressure of 995abbr=onNaNabbr=on about 355 mi (575 km) south-southwest of the southern tip of the Baja California peninsula.^[25]

August 30

• 06:00 UTC (11:00 p.m. PDT, August 29) at 19.9°N -123.4°WAfter oscillating between winds of 50 mph (85 km/h) and 60 mph (95 km/h) for two days, Tropical Storm Georgette weakens into a tropical depression about 885 mi (1,425 km) west-southwest of the southern tip of the Baja California peninsula.^[25]
• 12:00 UTC (5:00 a.m. PDT) at 11.9°N -103.1°WA tropical depression forms from a tropical wave about 405 mi (650 km) south-southwest of Acapulco, Guerrero.^[26]
• 18:00 UTC (11:00 a.m. PDT) at 20.3°N -125.6°WTropical Depression Georgette degenerates into a remnant low about 1,020 mi (1,640 km) west of the southern tip of the Baja California peninsula.^[25]

August 31

• 00:00 UTC (5:00 p.m. PDT, August 30) at 13.3°N -104.6°WThe tropical depression that had formed 12 hours prior strengthens into Tropical Storm Howard about 395 mi (640 km) southwest of Acapulco, Guerrero.^[26]

September

September 1

• 06:00 UTC (11:00 p.m. PDT, August 31) at 15.5°N -109.5°WTropical Storm Howard strengthens into a Category 1 hurricane about 645 mi (1,040 km) west of Acapulco, Guerrero.^[26]

September 2

• 06:00 UTC (11:00 p.m. PDT, September 1) at 17.3°N -112.6°WHurricane Howard rapidly strengthens to Category 3 intensity, skipping Category 2 status, about 840 mi (1,355 km) west of Acapulco, Guerrero. This makes it the second major hurricane of the season.^[26]
• 12:00 UTC (5:00 a.m. PDT) at 17.8°N -113.3°WHurricane Howard strengthens to Category 4 intensity about 885 mi (1,425 km) west of Acapulco, Guerrero. It simultaneously attains peak winds of 140 mph (220 km/h) and a minimum barometric pressure of 943abbr=onNaNabbr=on.^[26]

September 3

• 06:00 UTC (11:00 p.m. PDT, September 2) at 19.2°N -114.9°WHurricane Howard weakens to Category 3 intensity about 600 mi (965 km) south of Punta Eugenia, Baja California Sur.^[26]
• 12:00 UTC (5:00 a.m. PDT) at 19.9°N -115.4°WHurricane Howard weakens to Category 2 intensity about 545 mi (880 km) south of Punta Eugenia, Baja California Sur.^[26]
• 18:00 UTC (11:00 a.m. PDT) at 20.8°N -115.9°WHurricane Howard weakens to Category 1 intensity about 490 mi (790 km) south of Punta Eugenia, Baja California Sur.^[26]

September 4

• 12:00 UTC (5:00 a.m. PDT) at 23.2°N -117.5°WHurricane Howard weakens into a tropical storm about 355 mi (575 km) south-southwest of Punta Eugenia, Baja California Sur.^[26]

September 5

• 06:00 UTC (11:00 p.m. PDT, September 4) at 24.8°N -118.5°WTropical Storm Howard weakens into a tropical depression about 300 mi (480 km) southwest of Punta Eugenia, Baja California Sur.^[26]
• 18:00 UTC (11:00 a.m. PDT) at 26°N -118.8°WTropical Depression Howard degenerates into a remnant low about 265 mi (425 km) west-southwest of Punta Eugenia, Baja California Sur.^[26]

September 8

• 06:00 UTC (11:00 p.m. PDT, September 7) at 15.1°N -109.9°WA tropical depression forms from a tropical wave about 535 mi (860 km) south of Cabo San Lucas, Baja California Sur.^[27]
• 18:00 UTC (11:00 a.m. PDT) at 15.4°N -110.8°WThe tropical depression strengthens into Tropical Storm Isis about 520 mi (835 km) south of Cabo San Lucas, Baja California Sur.

September 10

• 00:00 UTC (5:00 p.m. PDT, September 9) at 17.3°N -114.1°WTropical Storm Isis reaches its initial peak intensity, with winds of 45 mph (75 km/h) and a barometric pressure of 1002abbr=onNaNabbr=on, about 470 mi (760 km) southwest of Cabo San Lucas, Baja California Sur.^[27]
• 12:00 UTC (5:00 a.m. PDT) at 17.3°N -115.7°WTropical Storm Isis weakens into a tropical depression about 535 mi (860 km) southwest of Cabo San Lucas, Baja California Sur.^[27]
• 18:00 UTC (11:00 a.m. PDT) at 11.2°N -93.5°WA tropical depression forms from a tropical wave about 365 mi (585 km) south-southeast of Salina Cruz, Oaxaca.^[6]

September 11

• 12:00 UTC (5:00 a.m. PDT) at 11.7°N -97.8°WThe tropical depression that had formed 18 hours prior strengthens into Tropical Storm Javier about 355 mi (575 km) south-southwest of Salina Cruz, Oaxaca.^[6]

September 12

• 00:00 UTC (5:00 p.m. PDT, September 11) at 17.4°N -121.3°WTropical Depression Isis restrengthens into a tropical storm about 830 mi (1,335 km) west-southwest of Cabo San Lucas, Baja California Sur.^[27]
• 18:00 UTC (11:00 a.m. PDT) at 13.1°N -103.4°WTropical Storm Javier strengthens into a Category 1 hurricane about 415 mi (665 km) south of Manzanillo, Colima.^[6]

September 13

• 06:00 UTC (11:00 p.m. PDT, September 12) at 14.1°N -104.8°WHurricane Javier strengthens to Category 2 intensity about 345 mi (555 km) south of Manzanillo, Colima.^[6]
• 12:00 UTC (5:00 a.m. PDT) at 14.7°N -105.4°WHurricane Javier strengthens to Category 3 intensity about 310 mi (500 km) south-southwest of Manzanillo, Colima, making it the third and final major hurricane of the season.^[6]
• 18:00 UTC (11:00 a.m. PDT) at 15.2°N -106.1°WHurricane Javier strengthens to Category 4 intensity about 295 mi (475 km) south-southwest of Manzanillo, Colima.^[6]

September 14

• 00:00 UTC (5:00 p.m. PDT, September 13) at 15.9°N -106.8°WHurricane Javier attains peak winds of 150 mph (240 km/h) and a minimum barometric pressure of 930abbr=onNaNabbr=on about 270 mi (435 km) southwest of Manzanillo, Colima, making it the strongest storm of the season.^[6]

September 15

• 12:00 UTC (5:00 a.m. PDT) at 17.8°N -131.8°WTropical Storm Isis strengthens into a Category 1 hurricane about 1,455 mi (2,345 km) west-southwest of Cabo San Lucas, Baja California Sur. It simultaneously attains peak winds of 75 mph (120 km/h) and a minimum barometric pressure of 987abbr=onNaNabbr=on.^[27]
• 18:00 UTC (11:00 a.m. PDT) at 18.2°N -132°WHurricane Isis weakens into a tropical storm about 1,460 mi (2,355 km) west-southwest of Cabo San Lucas, Baja California Sur.^[27]

September 16

• 00:00 UTC (5:00 p.m. PDT, September 15) at 18.9°N -109.5°WHurricane Javier weakens to Category 3 intensity about 340 mi (545 km) west of Manzanillo, Colima.^[6]
• 12:00 UTC (5:00 a.m. PDT) at 18.2°N -132.2°WTropical Storm Isis weakens into a tropical depression about 1,475 mi (2,370 km) west of Cabo San Lucas, Baja California Sur.^[27]
• 18:00 UTC (11:00 a.m. PDT) at 18°N -132.3°WTropical Depression Isis degenerates into a remnant low about 1,485 mi (2,390 km) west-southwest of Cabo San Lucas, Baja California Sur.^[27]

September 17

• 12:00 UTC (5:00 a.m. PDT) at 21.5°N -111.9°WHurricane Javier weakens to Category 2 intensity about 230 mi (370 km) south of Cabo San Lázaro, Baja California Sur.^[6]

September 18

• 00:00 UTC (5:00 p.m. PDT, September 17) at 22.4°N -112.4°WHurricane Javier weakens to Category 1 intensity about 165 mi (270 km) south of Cabo San Lázaro, Baja California Sur.^[6]
• 12:00 UTC (5:00 a.m. PDT) at 23.3°N -113.2°WHurricane Javier weakens into a tropical storm about 115 mi (185 km) south-southwest of Cabo San Lázaro, Baja California Sur.^[6]

September 19

• 00:00 UTC (5:00 p.m. PDT, September 18) at 24.8°N -113.5°WTropical Storm Javier weakens into a tropical depression about 75 mi (120 km) west of Cabo San Lázaro, Baja California Sur.^[6]
• 11:00 UTC (4:00 a.m. PDT) at 26.6°N -113°WTropical Depression Javier makes landfall on the west coast of Baja California Sur, about 35 mi (55 km) east-southeast of Punta Abreojos, with winds of 30 mph (45 km/h) and a barometric pressure of 1003abbr=onNaNabbr=on.^[6]
• 18:00 UTC (11:00 a.m. PDT) at 28.5°N -112°WTropical Depression Javier degenerates into a remnant low over the north-central Gulf of California, about 80 mi (130 km) west-northwest of Guaymas, Sonora.^[6]

October

October 4

• 18:00 UTC (11:00 a.m. PDT) at 13.8°N -111.3°WTropical Depression forms from an ITCZ disturbance about 585 mi (945 km) southwest of Manzanillo, Colima.^[28]

October 5

• 06:00 UTC (11:00 p.m. PDT, October 4) at 14.1°N -114°WTropical Depression strengthens into Tropical Storm Kay about 725 mi (1,165 km) west-southwest of Manzanillo, Colima.^[28]
• 12:00 UTC (5:00 a.m. PDT) at 14.4°N -115.1°WTropical Storm Kay attains peak winds of 45 mph (75 km/h) and a minimum barometric pressure of 1004abbr=onNaNabbr=on about 785 mi (1,260 km) west-southwest of Manzanillo, Colima.^[28]
• 18:00 UTC (11:00 a.m. PDT) at 15°N -116°WTropical Storm Kay weakens into a tropical depression about 825 mi (1,325 km) west-southwest of Manzanillo, Colima.^[28]

October 6

• 12:00 UTC (5:00 a.m. PDT) at 16.1°N -117.2°WTropical Depression Kay degenerates into a remnant low about 875 mi (1,410 km) west-southwest of Manzanillo, Colima.^[28]

October 11

• 18:00 UTC (11:00 a.m. PDT) at 14.4°N -96.7°WA tropical depression forms from an area of unsettled weather about 105 mi (165 km) south-southeast of Puerto Escondido, Oaxaca.^[11]

October 12

• 18:00 UTC (11:00 a.m. PDT) at 16.2°N -99.2°WThe aforementioned tropical depression strengthens into Tropical Storm Lester about 65 mi (100 km) southeast of Acapulco, Guerrero.^[11]

October 13

• 00:00 UTC (5:00 p.m. PDT, October 12) at 16.4°N -99.6°WTropical Storm Lester attains peak winds of 50 mph (85 km/h) and a minimum barometric pressure of 1000abbr=onNaNabbr=on about 35 mi (55 km) south-southeast of Acapulco, Guerrero.^[11]
• 12:00 UTC (5:00 a.m. PDT) at 16.7°N -100.6°WTropical Storm Lester weakens into a tropical depression about 45 mi (75 km) west-southwest of Acapulco, Guerrero; it dissipates six hours later.^[11]

October 25

• 00:00 UTC (5:00 p.m. PDT, October 24) at 18.3°N -109.2°WTropical Depression forms from a tropical wave about 320 mi (520 km) south of the southern tip of the Baja California peninsula.^[7]
• 06:00 UTC (11:00 p.m. PDT, October 24) at 19.3°N -109.1°WTropical Depression attains peak winds of 35 mph (55 km/h) about 255 mi (410 km) south-southeast of the southern tip of the Baja California peninsula.^[7]

October 26

• 00:00 UTC (5:00 p.m. PDT, October 25) at 23.6°N -108.6°WTropical Depression attains a minimum barometric pressure of 1004abbr=onNaNabbr=on about 100 mi (155 km) east-northeast of the southern tip of the Baja California peninsula.^[7]
• 10:00 UTC (3:00 a.m. PDT) at 25.4°N -108.8°WTropical Depression makes landfall near Topolobampo and Guasave in the Mexican state of Sinaloa with winds of 35 mph (55 km/h) and a barometric pressure of 1005abbr=onNaNabbr=on.^[7]
• 18:00 UTC (11:00 a.m. PDT) at 25.8°N -108.8°WTropical Depression is last noted inland about 25 mi (35 km) northeast of Topolobampo, or about 25 mi (35 km) northwest of Guasave; it dissipates six hours later over the Sierra Madre Occidental.^[7]

November

• No tropical cyclones were active in November.

November 30

• The 2004 Pacific hurricane season officially ends.^[1]

See also

• Timeline of the 2004 Atlantic hurricane season
• Timeline of the 2004 Pacific typhoon season
• Timeline of the 2004 North Indian Ocean cyclone season
• Timelines of the South-West Indian Ocean cyclone seasons: 2003–04, 2004–05
• Timelines of the Australian region cyclone seasons: 2003–04, 2004–05
• Timelines of the South Pacific cyclone seasons: 2003–04, 2004–05

External links

• National Hurricane Center
• Central Pacific Hurricane Center

Notes and References

1. Web site: Tropical Cyclone Climatology. National Hurricane Center. Miami, Florida. https://web.archive.org/web/20241010040327/https://www.nhc.noaa.gov/climo/. October 10, 2024. live. November 5, 2024.
2. 2004 Tropical Cyclones Central North Pacific. Nash. Andy. Craig. Tim. Matsuda. Roy. Powell. Jeffrey. Central Pacific Hurricane Center. Honolulu, Hawaii. PDF. NOAA Technical Memorandum NWSTM PR-52. February 2005. July 20, 2024. https://web.archive.org/web/20240418010515/https://www.nhc.noaa.gov/data/tcr/CP2004_Seasonal_TCR.pdf. April 18, 2024. live.
3. Avila. Lixion A.. Lixion Avila. Pasch. Richard J.. Beven II. John L.. Franklin. James L.. James Franklin (meteorologist). Lawrence. Miles B.. Stewart. Stacy R.. August 2, 2005. Annual Summary: Eastern North Pacific Hurricane Season of 2004. Monthly Weather Review. 134. 3. 1026. American Meteorological Society. 10.1175/MWR3095.1. 2006MWRv..134.1026A. free. December 4, 2024. https://web.archive.org/web/20240519083745/https://journals.ametsoc.org/view/journals/mwre/134/3/mwr3095.1.xml. May 19, 2024. live.
4. Web site: Basin Archives: Northeast Pacific Ocean Historical Tropical Cyclone Statistics. Colorado State University. Fort Collins, Colorado. https://web.archive.org/web/20241129042611/https://tropical.atmos.colostate.edu/Realtime/index.php?arch&loc=northeastpacific. November 29, 2024. live. December 3, 2024.
5. News: Huracán "Javier" Acecha a la Costa Pacífica de México. Nacion Internacionales. Associated Press. September 15, 2004. December 3, 2024. es-MX. Mexico City. https://web.archive.org/web/20161018221433/http://wvw.nacion.com/ln_ee/2004/septiembre/15/mundo7.html. October 18, 2016. dead.
6. Web site: Tropical Cyclone Report: Hurricane Javier. Avila. Lixion A.. Lixion Avila. National Hurricane Center. Miami, Florida. PDF. November 15, 2004. November 12, 2010. https://web.archive.org/web/20230409202549/https://www.nhc.noaa.gov/data/tcr/EP132004_Javier.pdf. April 9, 2023. live.
7. Tropical Cyclone Report: Tropical Depression Sixteen-E. Stewart. Stacy R.. National Hurricane Center. Miami, Florida. PDF. November 18, 2004. November 12, 2010. https://web.archive.org/web/20231031213639/https://www.nhc.noaa.gov/data/tcr/EP162004_Sixteen-E.pdf. October 31, 2023. live.
8. Web site: Hurricane Javier – September 18–21, 2004. Roth. David M.. Weather Prediction Center. College Park, Maryland. December 3, 2024. https://web.archive.org/web/20240414201147/http://www.wpc.ncep.noaa.gov/tropical/rain/javier2004.html. April 14, 2024. live.
9. News: Rainy Weather Knocks Out Sport fishing for La Playita Pangas. Tolbert. Jim. MexFish.com. San José del Cabo, Baja California Sur. September 5, 2004. December 3, 2024. https://web.archive.org/web/20230918013914/https://www.mexfish.com/sjdc/sjdc2004/sjdc040906a/sjdc040906a.htm. September 18, 2023. live.
10. News: Quiet Summer Season Ends. Robinson. Alicia. Daily Pilot. Los Angeles Times. Los Angeles, California. September 7, 2004. December 3, 2024. https://web.archive.org/web/20241203231019/https://www.latimes.com/socal/daily-pilot/news/tn-dpt-xpm-2004-09-07-export9096-story.html. December 3, 2024. live.
11. Web site: Tropical Cyclone Report: Tropical Storm Lester. Pasch. Richard J.. Roberts. David P.. National Hurricane Center. Miami, Florida. PDF. December 10, 2004. November 12, 2010. https://web.archive.org/web/20231216113803/https://www.nhc.noaa.gov/data/tcr/EP152004_Lester.pdf. December 16, 2023. live.
12. Web site: NHC Tropical Cyclone Text Product Descriptions. National Hurricane Center. Miami, Florida. July 13, 2024. https://web.archive.org/web/20240710194208/https://www.nhc.noaa.gov/aboutnhcprod.shtml. July 10, 2024. live.
13. Web site: Update on NHC Products and Services for 2015. March 26, 2015. National Hurricane Center. PDF. July 13, 2024. https://web.archive.org/web/20231128044856/https://www.nhc.noaa.gov/news/20150326_pa_2015seasonChanges.pdf. November 28, 2023. live.
14. Web site: Understanding the Date/Time Stamps. March 21, 2024. https://web.archive.org/web/20230226150852/https://www.nws.noaa.gov/mdl/forecast/graphics/common/time.html. February 26, 2023. . Silver Spring, Maryland. live.
15. Tropical Cyclone Report: Tropical Storm Agatha. Avila. Lixion A.. Lixion Avila. National Hurricane Center. Miami, Florida. PDF. June 2, 2004. August 3, 2009. https://web.archive.org/web/20231216044124/https://www.nhc.noaa.gov/data/tcr/EP012004_Agatha.pdf. December 16, 2023. live.
16. Tropical Cyclone Report: Tropical Depression Two-E. Lawrence. Miles B.. National Hurricane Center. Miami, Florida. PDF. July 17, 2004. August 3, 2009. https://web.archive.org/web/20231101023255/https://www.nhc.noaa.gov/data/tcr/EP022004_Two.pdf. November 1, 2023. live.
17. Tropical Cyclone Report: Tropical Storm Blas. Pasch. Richard J.. National Hurricane Center. Miami, Florida. PDF. August 5, 2004. August 3, 2009. https://web.archive.org/web/20231216001903/https://www.nhc.noaa.gov/data/tcr/EP032004_Blas.pdf. December 16, 2023. live.
18. Tropical Cyclone Report: Hurricane Celia. Stewart. Stacy R.. National Hurricane Center. Miami, Florida. PDF. October 12, 2004. August 3, 2009. https://web.archive.org/web/20230715111550/https://www.nhc.noaa.gov/data/tcr/EP042004_Celia.pdf. July 15, 2023. live.
19. Tropical Cyclone Report: Hurricane Darby. Beven. Jack. National Hurricane Center. Miami, Florida. PDF. December 17, 2004. November 11, 2010. https://web.archive.org/web/20231101022216/https://www.nhc.noaa.gov/data/tcr/EP052004_Darby.pdf. November 1, 2023. live.
20. Tropical Weather Summary. Avila. Lixion. Lixion Avila. Beven. Jack. Franklin. James. James Franklin (meteorologist). Lawrence. Miles. Pasch. Richard. Stewart. Stacy. National Hurricane Center. Miami, Florida. December 1, 2004. November 12, 2010. https://web.archive.org/web/20240406045416/https://www.nhc.noaa.gov/archive/2004/tws/MIATWSEP_nov.shtml. April 6, 2024. live.
21. Abbreviated Tropical Cyclone Report: Tropical Depression Six-E. Franklin. James L.. James Franklin (meteorologist). Knabb. Richard D.. Richard Knabb. National Hurricane Center. Miami, Florida. PDF. November 16, 2004. November 11, 2010. https://web.archive.org/web/20231101022223/https://www.nhc.noaa.gov/data/tcr/EP062004_Six-E.pdf. November 1, 2023. live.
22. Tropical Cyclone Report: Tropical Storm Estelle. Avila. Lixion A.. Lixion Avila. National Hurricane Center. Miami, Florida. PDF. November 3, 2004. November 11, 2010. https://web.archive.org/web/20231216064055/https://www.nhc.noaa.gov/data/tcr/EP072004_Estelle.pdf. December 16, 2023. live.
23. Tropical Cyclone Report: Hurricane Frank. Roberts. David P.. Lawrence. Miles B.. National Hurricane Center. Miami, Florida. PDF. November 19, 2004. November 11, 2010. https://web.archive.org/web/20230715111604/https://www.nhc.noaa.gov/data/tcr/EP082004_Frank.pdf. July 15, 2023. live.
24. Abbreviated Tropical Cyclone Report: Tropical Depression Nine-E. Pasch. Richard J.. National Hurricane Center. Miami, Florida. PDF. November 12, 2004. November 11, 2010. https://web.archive.org/web/20231101023257/https://www.nhc.noaa.gov/data/tcr/EP092004_Nine-E.pdf. November 1, 2023. live.
25. Tropical Cyclone Report: Tropical Storm Georgette. Stewart. Stacy R.. National Hurricane Center. Miami, Florida. PDF. October 14, 2004. November 11, 2010. https://web.archive.org/web/20231216012946/https://www.nhc.noaa.gov/data/tcr/EP102004_Georgette.pdf. December 16, 2023. live.
26. Tropical Cyclone Report: Hurricane Howard. Beven. Jack. National Hurricane Center. Miami, Florida. PDF. December 13, 2004. November 12, 2010. https://web.archive.org/web/20230907025744/https://www.nhc.noaa.gov/data/tcr/EP112004_Howard.pdf. September 7, 2023. live.
27. Tropical Cyclone Report: Hurricane Isis. Franklin. James L.. James Franklin (meteorologist). Roberts. David P.. National Hurricane Center. Miami, Florida. PDF. November 17, 2004. November 12, 2010. https://web.archive.org/web/20230715111555/https://www.nhc.noaa.gov/data/tcr/EP122004_Isis.pdf. July 15, 2023. live.
28. Tropical Cyclone Report: Tropical Storm Kay. Roberts. David P.. Lawrence. Miles B.. National Hurricane Center. Miami, Florida. PDF. November 20, 2004. November 12, 2010. https://web.archive.org/web/20231216063811/https://www.nhc.noaa.gov/data/tcr/EP142004_Kay.pdf. December 16, 2023. live.