Timeline of the 2004 Pacific hurricane season
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Below is a '''timeline of the 2004 Pacific hurricane season''', documenting all the storm formations, strengthening, weakening, [[landfall (meteorology)|landfalls]], [[Extratropical cyclone#Extratropical transition|extratropical transitions]], as well as dissipation. The season officially began on [[May 15]], [[2004]], and lasted until [[November 30]]. For convenience and clarity, in the timeline below, all landfalls are bolded. The timeline also includes information which was not operationally released, meaning that information from post-storm reviews by the [[National Hurricane Center]], such as information on a storm that was not operationally warned on, have been included.
==May==
*[[May 21]]
**5 p.m. [[Pacific Time Zone|PDT]] (0000 [[UTC]] [[May 22]]) - '''Tropical Depression One-E''' forms 575 statute miles (925 km) south-southeast of [[Cabo San Lucas]], [[Mexico]].
*[[May 22]]
**5 a.m. PDT (1200 UTC) - Tropical Depression One-E strengthens into '''Tropical Storm Agatha'''.
*[[May 23]]
**5 p.m. PDT (0000 UTC, [[May 24]]) - Tropical Storm Agatha weakens into a tropical depression.
*[[May 24]]
**5 a.m. PDT (1200 UTC) - Tropical Depression Agatha dissipates.
==June==
*There was no tropical cyclone activity in this basin in June. The last time this happened was in 1969.
==July==
*[[July 2]]
**9 a.m. PDT (1600 UTC) - '''Tropical Depression Two-E''' forms.
*[[July 3]]
**2 p.m. PDT (2100 UTC) - Tropical Depression Two-E loses tropical characteristics.
*[[July 5]]
**5 p.m. [[Hawaii-Aleutian Standard Time Zone|HST]] (0300 UTC [[July 6]]) - '''Tropical Depression One-C''' forms {{convert|700|mi|km}} south-southeast of [[Johnston Island]].
*[[July 6]]
**5 p.m. HST (0300 UTC [[July 7]]) - Tropical Depression One-C dissipates.
*[[July 12]]
**8 a.m. PDT (1500 UTC) - '''Tropical Depression Three-E''' forms south of [[Mexico]].
**8 p.m. PDT (0300 UTC [[July 13]]) - Tropical Depression Three-E is upgraded to '''Tropical Storm Blas'''.
*[[July 14]]
**2 p.m. PDT (2100 UTC) - Tropical Storm Blas is downgraded to a tropical depression.
**8 p.m. PDT (0300 UTC [[July 15]]) - Tropical Depression Blas begins dissipating.
*[[July 18]]
**8 p.m. PDT (0300 UTC [[July 19]]) - '''Tropical Depression Four-E''' forms {{convert|600|mi|km}} south-southwest of the southern tip of [[Baja California (peninsula)|Baja California]].
*[[July 19]]
**2 p.m. PDT (2100 UTC) - Tropical Depression Four-E is upgraded to '''Tropical Storm Celia'''.
*[[July 21]]
**8 p.m. PDT (0300 UTC [[July 22]]) - Tropical Storm Celia becomes '''Hurricane Celia'''.
*[[July 22]]
**11 a.m. PDT (1800 UTC) - Hurricane Celia is downgraded to a tropical storm.
*[[July 24]]
**2 a.m. PDT (0900 UTC) - Tropical Storm Celia is downgraded to a tropical depression.
*[[July 25]]
**2 p.m. PDT (2100 UTC) - Tropical Depression Celia dissipates into a remnant low.
*[[July 26]]
**2 p.m. PDT (2100 UTC) - '''Tropical Depression Five-E''' forms south of [[Cabo San Lucas]].
**8 p.m. PDT (0300 UTC [[July 27]]) - Tropical Depression Five-E is upgraded to '''Tropical Storm Darby'''.
*[[July 28]]
**2 a.m. PDT (0900 UTC) - Tropical Storm Darby becomes '''Hurricane Darby'''.
**2 p.m. PDT (2100 UTC) - Hurricane Darby reaches Category 2 intensity.
*[[July 29]]
**2 a.m. PDT (0900 UTC) - Hurricane Darby reaches Category 3 intensity, the first major Pacific hurricane since 2002.
**2 a.m. PDT (0900 UTC) - '''Tropical Depression Six-E''' forms about {{convert|425|nmi|km}} south-southwest of the southern tip of [[Baja California (peninsula)|Baja California]].
**8 p.m. PDT (0300 UTC [[July 30]]) - Advisories on Tropical Depression Six-E are discontinued.
*[[July 30]]
**8 a.m. PDT (1500 UTC) - Hurricane Darby is downgraded to a tropical storm.
*[[July 31]]
**8 a.m. PDT (1500 UTC) - Tropical Storm Darby weakens to a tropical depression.
**11 p.m. PDT (0900 UTC [[August 1]]) - Tropical Depression Darby dissipates.
==August==
*[[August 1]]
**8 p.m. PDT (0300 UTC [[August 2]]) - '''Tropical Depression Six-E''' regenerates about {{convert|1215|nmi|km}} west-southwest of [[Baja California (peninsula)|Baja California]].
*[[August 3]]
**2 p.m. PDT (2100 UTC) - Tropical Depression Six-E dissipates.
*[[August 19]]
**2 a.m. PDT (0900 UTC) - '''Tropical Depression Seven-E''' forms {{convert|1395|nmi|km}} east-southeast of [[Hilo, Hawaii]].
*[[August 20]]
**2 a.m. PDT (0900 UTC) - Tropical Depression Seven-E is upgraded to '''Tropical Storm Estelle'''.
**8 p.m. PDT (5 p.m. HST; 0300 UTC [[August 21]]) - Tropical Storm Estelle crosses 140°W, entering the [[Central Pacific Hurricane Center]]'s jurisdiction.
*[[August 23]]
**2 a.m. PDT (0900 UTC) - '''Tropical Depression Eight-E''' forms from the remains of [[Tropical Storm Earl (2004)|Tropical Storm Earl]], which crossed over from the [[Atlantic Ocean|Atlantic basin]].
**8 a.m. PDT (1500 UTC) - Tropical Depression Eight-E strengthens into '''Tropical Storm Frank''', one of the few times a storm has survived crossing from the Atlantic to the Pacific.
**2 p.m. PDT (2100 UTC) - Tropical Storm Frank is upgraded to '''Hurricane Frank'''
**2 p.m. PDT (2100 UTC) - '''Tropical Depression Nine-E''' forms about {{convert|845|nmi|km}} west-southwest of the tip of [[Baja California (peninsula)|Baja California]].
*[[August 25]]
**2 a.m. PDT (0900 UTC) - Hurricane Frank is downgraded to a tropical storm.
**8 p.m. PDT (0300 UTC [[August 26|Aug. 26]]) - Tropical Storm Frank weakens to a tropical depression.
*[[August 26]]
**8 a.m. PDT (1500 UTC) - Tropical Depression Frank dissipates.
**8 a.m. PDT (1500 UTC) - Tropical Depression Nine-E dissipates.
**8 a.m. PDT (1500 UTC) - '''Tropical Depression Ten-E''' forms about {{convert|305|mi|km}} south-southwest of [[Manzanillo]], [[Colima]], [[Mexico]].
**2 p.m. PDT (2100 UTC) - Tropical Depression Ten-E is upgraded to '''Tropical Storm Georgette'''.
*[[August 30]]
**2 a.m. PDT (0900 UTC) - Tropical Storm Georgette weakens to a tropical depression.
**8 a.m. PDT (1500 UTC) - Tropical Depression Georgette degenerates into a remnant low.
**2 p.m. PDT (2100 UTC) - '''Tropical Depression Eleven-E''' forms southwest of [[Acapulco]].
*[[August 31]]
**2 a.m. PDT (0900 UTC) - Tropical Depression Eleven-E is upgraded to '''Tropical Storm Howard'''.
==September==
*[[September 1]]
**2 a.m. PDT (0900 UTC) - Tropical Storm Howard is upgraded to '''Hurricane Howard'''.
*[[September 2]]
**2 a.m. PDT (0900 UTC) - Hurricane Howard jumps to Category 3 intensity.
**8 a.m. PDT (1500 UTC) - Hurricane Howard reaches Category 4 intensity.
*[[September 4]]
**8 a.m. PDT (1500 UTC) - Hurricane Howard weakens to a tropical storm.
*[[September 5]]
**2 a.m. PDT (0900 UTC) - Tropical Storm Howard weakens to a tropical depression.
**8 a.m. PDT (1500 UTC) - Tropical Depression Howard dissipates.
*[[September 8]]
**2 a.m. PDT (0900 UTC) - '''Tropical Depression Twelve-E''' forms.
**2 p.m. PDT (2100 UTC) - Tropical Depression Twelve-E is upgraded to '''Tropical Storm Isis'''.
*[[September 10]]
**2 p.m. PDT (2100 UTC) - Tropical Storm Isis weakens to a tropical depression.
**2 p.m. PDT (2100 UTC) - '''Tropical Depression Thirteen-E''' forms south-southeast of the [[Gulf of Tehuantepec]].
*[[September 11]]
**8 a.m. PDT (1500 UTC) - Tropical Depression Thirteen-E is upgraded to '''Tropical Storm Javier'''.
**8 p.m. PDT (0300 UTC [[September 12|Sept. 12]]) - Tropical Depression Isis restrengthens into a tropical storm.
*[[September 12]]
**2 p.m. PDT (2100 UTC) - Tropical Storm Javier strengthens into '''Hurricane Javier'''.
*[[September 13]]
**2 a.m. PDT (0900 UTC) - Hurricane Javier reaches Category 2 strength.
**8 a.m. PDT (1500 UTC) - Hurricane Javier reaches Category 3 strength.
**2 p.m. PDT (2100 UTC) - Hurricane Javier reaches Category 4 strength.
*[[September 15]]
**8 a.m. PDT (1500 UTC) - Tropical Storm Isis is upgraded to '''Hurricane Isis'''.
**2 p.m. PDT (2100 UTC) - Hurricane Isis is downgraded to a tropical storm as the eye collapses.
*[[September 16]]
**2 p.m. PDT (2100 UTC) - Tropical Storm Isis weakens to a tropical depression.
*[[September 17]]
**2 a.m. PDT (0900 UTC) - Tropical Depression Isis loses tropical characteristics.
*[[September 18]]
**8 a.m. PDT (1500 UTC) - Hurricane Javier is downgraded to a tropical storm.
**8 p.m. PDT (0300 UTC [[September 19|Sept. 19]]) - Tropical Storm Javier weakens to a tropical depression.
*[[September 19]]
**''Exact time unknown'' - '''Tropical Depression Javier makes [[landfall]] near [[San Ignacio]] in [[Baja California Sur]].'''
**8 a.m. PDT (1500 UTC) - Tropical Depression Javier dissipates inland.
==October==
*[[October 4]]
**2 p.m. PDT (2100 UTC) - '''Tropical Depression Fourteen-E''' forms south of [[Cabo San Lucas]].
*[[October 5]]
**8 a.m. PDT (1500 UTC) - Tropical Depression Fourteen-E becomes '''Tropical Storm Kay'''.
**2 p.m. PDT (2100 UTC) - Tropical Storm Kay and weakens into a tropical depression.
*[[October 6]]
**8 a.m. PDT (2100 UTC) - Tropical Depression Kay begins dissipating into a remnant low.
*[[October 11]]
**2 p.m. PDT (2100 UTC) - '''Tropical Depression Fifteen-E''' forms {{convert|90|mi|km}} south-southwest of [[Puerto Angel]], [[Mexico]].
*[[October 12]]
**2 p.m. PDT (2100 UTC) - Tropical Depression Fifteen-E strengthens into '''Tropical Storm Lester'''.
*[[October 13]]
**2 p.m. PDT (2100 UTC) - Tropical Storm Lester is downgraded to a tropical depression and rapidly dissipates.
*[[October 25]]
**3 p.m. PDT (2200 UTC) - '''Tropical Depression Sixteen-E''' forms {{convert|100|mi|km}} south-southwest of [[Altata]], [[Mexico]].
*[[October 26]]
**2 a.m. PDT (0900 UTC) - Tropical Depression Sixteen-E dissipates {{convert|35|mi|km}} west of Altata, Mexico.
==See also==
{{tcportal}}
*[[2004 Pacific hurricane season]]
*[[List of Pacific hurricane seasons]]
*[[Timeline of the 2004 Atlantic hurricane season]]
*[[Timeline of the 2004 Pacific typhoon season]]
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{{succession box|before=None|title=Pacific hurricane seasons timelines|years=2004|after=[[Timeline of the 2005 Pacific hurricane season|2005]]}}{{end box}}
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[[Category:2004 Pacific hurricane season| Timeline]]
[[Category:2004 meteorology]]
[[Category:2004 timelines|Pacific hurricane season]]
[[Category:Timelines]]