View source for 2011 Pacific hurricane season

{{Short description|none}} <!-- "none" is a legitimate description when the title is already adequate; see [[WP:SDNONE]] -->
{{Infobox hurricane season
| Basin=EPac
| Year=2011
| Track=2011 Pacific hurricane season summary map.png
| First storm formed=June&nbsp;7, 2011 
| Last storm dissipated=November&nbsp;25, 2011
| Strongest storm name=[[Hurricane Dora (2011)|Dora]]
| Strongest storm pressure=929
| Strongest storm winds=135
| Average wind speed=1
| Total depressions=13
| Total storms=11
| Total hurricanes=10
| Total intense=6
| ACE Index=120.9
| Damagespre=>
| Damages=204
| Fatalities=49 total
| five seasons=[[2009 Pacific hurricane season|2009]], [[2010 Pacific hurricane season|2010]], '''2011''', [[2012 Pacific hurricane season|2012]], [[2013 Pacific hurricane season|2013]]
| Season timeline=Timeline of the 2011 Pacific hurricane season
|Atlantic season=2011 Atlantic hurricane season
|West Pacific season=2011 Pacific typhoon season
|North Indian season=2011 North Indian Ocean cyclone season
}}
The '''2011 Pacific hurricane season''' was a below average season in terms of [[Tropical cyclone naming|named storms]], although it had an above average number of hurricanes and major hurricanes. During the season, 13 tropical depressions formed along with 11 tropical storms, 10 hurricanes and 6 major hurricanes. The season officially began on May&nbsp;15 in the East Pacific Ocean, and on June&nbsp;1 in the Central Pacific; they both ended on November&nbsp;30. These dates conventionally delimit the period of each year when most [[tropical cyclone]]s form in the [[Pacific hurricane|Pacific basin]]. The season's first cyclone, [[Hurricane Adrian (2011)|Hurricane Adrian]] formed on June 7, and the last, Hurricane Kenneth, dissipated on November 25.

Despite the decrease in storms, there were several intense and destructive hurricanes this season. [[Hurricane Beatriz (2011)|Hurricane Beatriz]] killed four people in Southwestern Mexico. [[Hurricane Jova (2011)|Hurricane Jova]] killed eight and caused $203.67 million (2011 USD) in damage to Western Mexico. [[Tropical Depression Twelve-E (2011)|Tropical Depression Twelve-E]] killed 30 people in Central America. Meanwhile, Kenneth became the strongest November storm at the time. [[Hurricane Hilary (2011)|Hurricane Hilary]] brought additional flooding to Southwestern Mexico.

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==Seasonal forecasts==
{| class="toccolours" cellspacing=0 cellpadding=3 style="float:right; margin-left:1em; text-align:right; clear: right;"
|+'''Predictions of tropical activity in the 2011 season'''
|- style="background:#ccf;"
! style="text-align:center;"|Source !! style="text-align:center;"|Date !! style="text-align:center;"|<small>Named<br />storms</small> !! style="text-align:center;"| <Small>Hurricanes</small> !! style="text-align:center;"|<small>Major<br />hurricanes</small> !! Ref
|-
| style="text-align:center;" colspan="2"|''Average <small>(1981–2010)</small>'' || 15.6 || 8.6 || 4.1 ||<ref name="Back Ground">{{cite web|author=Unattributed |work=Climate Prediction Center |title=Background Information: East Pacific Hurricane Season |publisher=National Oceanic and Atmospheric Administration |access-date=July 31, 2011 |url=http://www.cpc.ncep.noaa.gov/products/Epac_hurr/background_information.html |date=May 19, 2011 |url-status=live |archive-url=https://web.archive.org/web/20110805204912/http://www.cpc.ncep.noaa.gov/products/Epac_hurr/background_information.html |archive-date=August 5, 2011 }}</ref>
|-
| style="text-align:center;" colspan="2"|''Average <small>(1995–2010)</small>'' || 14 || 7 || 3 ||<ref name="NOAA May">{{cite web|author=Climate Prediction Center|date=May 19, 2011|title=NOAA predicts below normal Eastern Pacific hurricane season|publisher=National Oceanic and Atmospheric Administration|access-date=June 9, 2011|url=http://www.noaanews.noaa.gov/stories2011/20110519_eastpacifichurricaneoutlook.html| archive-url= https://web.archive.org/web/20110606111734/http://www.noaanews.noaa.gov/stories2011/20110519_eastpacifichurricaneoutlook.html| archive-date= June 6, 2011 | url-status= live}}</ref>
|-
| style="text-align:center;" colspan="2"|''Record high activity'' || [[1992 Pacific hurricane season|27]] || [[2014 Pacific hurricane season|16]] ([[1992 Pacific hurricane season|Tie]]) || [[2015 Pacific hurricane season|11]] ||
|-
| style="text-align:center;" colspan="2"|''Record low activity'' || [[1977 Pacific hurricane season|8]] ([[2010 Pacific hurricane season|Tie]]) || [[2010 Pacific hurricane season|3]] || [[1977 Pacific hurricane season|0]] ([[2003 Pacific hurricane season|Tie]]) ||
|-
| colspan="6" style="text-align:center;"|<hr>
|-
|align="left"|[[Climate Prediction Center|CPC]] || style="text-align:left;"|May&nbsp;19, 2011 || 9–15 || 5–8 || 1–3 ||<ref name="NOAA May"/>
|-
| colspan="6" style="text-align:center;"|<hr>
|-
|align="left"| '''Actual activity''' || || 11 || 10 || 6
|}

On May&nbsp;19, the [[Climate Prediction Center]] released its pre-season outlook. The scientists stated a 70% chance of a below-normal season, a 25% chance of a near-normal season and a 5% chance of an above-normal season. The climatologists expected 9–15 named storms, with 5–8 becoming hurricanes, and 1–3 becoming major hurricanes. The [[accumulated cyclone energy]] was expected to be 45 to 105% of the median. The below-normal activity forecast was because of increased wind shear and a high expectation of [[El Niño–Southern Oscillation]] (ENSO)-neutral conditions (no [[El Niño]] or [[La Niña]]) throughout the peak months of July, August and September, together with lingering La Niña conditions at the beginning of the season.<ref name=PSF>{{cite web|title=NOAA: 2011 Eastern Pacific Hurricane Season Outlook|url=http://www.cpc.ncep.noaa.gov/products/Epac_hurr/Epac_hurricane.html|publisher=[[Climate Prediction Center]]|access-date=June 9, 2011| archive-url= https://web.archive.org/web/20110606065117/http://www.cpc.ncep.noaa.gov/products/Epac_hurr/Epac_hurricane.html| archive-date= June 6, 2011 | url-status= live}}</ref>
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==Seasonal summary==
{{For timeline}}
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  from:19/06/2011 till:22/06/2011 color:C1 text:"[[Hurricane Beatriz (2011)|Beatriz (C1)]]"
  from:07/07/2011 till:10/07/2011 color:C1 text:"Calvin (C1)"
  from:18/07/2011 till:24/07/2011 color:C4 text:"[[Hurricane Dora (2011)|Dora (C4)]]"
  from:31/07/2011 till:06/08/2011 color:C4 text:"Eugene (C4)"
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  from:16/08/2011 till:21/08/2011 color:C1 text:"Greg (C1)"
  from:31/08/2011 till:31/08/2011 color:TD text:"Eight-E (TD)"
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 from:21/09/2011 till:30/09/2011 color:C4 text:"[[Hurricane Hilary (2011)|Hilary (C4)]]"
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 from:06/10/2011 till:16/10/2011 color:C2 text:"Irwin (C2)"
 from:12/10/2011 till:12/10/2011 color:TD text:"[[Tropical Depression Twelve-E (2011)|Twelve-E (TD)]]"
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[[File:Jova and Irwin 2011-10-11 1445Z.jpg|270px|thumb|right|In the eastern Pacific, two simultaneous systems on October&nbsp;11: Tropical Storm Irwin (''left'') and Hurricane Jova (''right'')]]
The season got off to an active start with first storm, Adrian, becoming one of only a handful of tropical cyclones to attain Category 4 status in June. Four other storms, Dora, Eugene, Hilary, and Kenneth attained Category 4 status. Dora was the strongest storm of the year, peaking at 155&nbsp;mph, just short of Category 5 status. The month of August was about average in terms of the number of storms, with the strongest of the month being Eugene. However, the first half of September had very little activity, due to the return of a [[La Niña]] event. Tropical Depression Eight-E was the only storm in the first half of September, when it dissipated on September 1.

[[Hurricane Hilary (2011)|Hilary]] became the second storm to form in September, becoming the fourth major hurricane of the season, during the afternoon hours of September&nbsp;22. After Hilary, Jova unexpectedly became the fifth major hurricane of the season during the early morning hours of October&nbsp;10. [[Tropical Depression Twelve-E (2011)|Tropical Depression Twelve-E]] killed 30 people in Central America when it made landfall near [[El Salvador]] on October&nbsp;12. On November 19, Kenneth formed as a tropical depression and quickly strengthened into a hurricane two days later. Kenneth became the first major hurricane in November and latest-forming major hurricane in the eastern north Pacific basin in the satellite era, until being surpassed by [[Hurricane Sandra (2015)|Hurricane Sandra]] in [[2015 Pacific hurricane season|2015]]; the last to do so was [[Hurricane Winnie (1983)|Winnie]] in 1983, which only peaked at Category 1 hurricane status. Hurricane Kenneth, however, intensified to attain Category 4 status on November 22, which broke the record at the time.

The [[accumulated cyclone energy]] (ACE) index for the 2011 Pacific hurricane season as calculated by Colorado State University using data from the National Hurricane Center was 120.9&nbsp;units.{{#tag:ref|The total represents the sum of the squares of the maximum sustained wind speed (knots) for every (sub)tropical storm's intensity of over 33&nbsp;knots (38&nbsp;mph, 61&nbsp;km/h), divided by 10,000 while they are above that threshold; therefore, tropical depressions are not included.|group="nb"}}<ref>{{cite web| title=Basin Archives: Northeast Pacific Ocean Historical Tropical Cyclone Statistics|url=http://tropical.atmos.colostate.edu/Realtime/index.php?arch&loc=northeastpacific|publisher=Colorado State University|location=Fort Collins, Colorado|access-date=July 8, 2022}}</ref> Broadly speaking, ACE is a measure of the power of a tropical or subtropical storm multiplied by the length of time it existed. It is only calculated for full advisories on specific tropical and subtropical systems reaching or exceeding wind speeds of {{convert|39|mph|km/h|abbr=on}}.

==Systems==
===Hurricane Adrian===
{{main|Hurricane Adrian (2011)}}
{{Infobox hurricane small
| Basin=EPac
| Image=File:Adrian 2011-06-10 0000Z.png
| Track=Adrian 2011 track.png
| Formed=June&nbsp;7
| Dissipated=June&nbsp;12
| 1-min winds=120
| Pressure=944
}}
In early June, a well-defined [[Low-pressure area|area of low pressure]] produced disorganized weather several hundred miles from the Pacific coast of Mexico.<ref>{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201106051140/index.php?basin=epac|title=Graphical Tropical Weather Outlook|date=June 5, 2011|access-date=2011-06-07|publisher=[[National Hurricane Center]]|author=Blake, Eric}}</ref> By June&nbsp;7, the low developed sufficiently organized deep [[Atmospheric convection|convection]] to be classified as a tropical cyclone, and the [[National Hurricane Center]] (NHC) designated it as Tropical Depression One-E at 1500&nbsp;UTC, about {{convert|365|mi|km|abbr=on|round=5}} south of [[Acapulco]]. Upon developing, the depression was located over warm [[sea surface temperature]]s, and upper-level [[wind shear]] in its vicinity was forecast to remain conducive for intensification.<ref name="TD1-EADV1">{{cite web|url=http://www.nhc.noaa.gov/archive/2011/ep01/ep012011.discus.001.shtml?|title=Tropical Depression One-E Discussion Number One|publisher=National Hurricane Center|date=June 7, 2011|access-date=2011-06-07|author=Cangialosi, John}}</ref> Caught in weak [[Tropical cyclone#Steering winds|steering currents]], the system further organized while moving little; it was upgraded to Tropical Storm Adrian later that day, with winds of {{convert|60|mph|km/h|abbr=on|round=5}}.<ref name="Adisc3">{{cite web|url=http://www.nhc.noaa.gov/archive/2011/ep01/ep012011.discus.003.shtml?|title=Tropical Storm Adrian Discussion Number Three|publisher=National Hurricane Center|date=June 7, 2011|access-date=2011-06-08|author=Blake, Eric}}</ref>

Steady strengthening continued, and Adrian became a hurricane early on June&nbsp;9 as it tracked toward the west-northwest along [[Ridge (meteorology)|high pressure]] over Mexico.<ref name="Discuss7">{{cite web|author=Blake, Eric |date=June 9, 2011|title=Hurricane Adrian Discussion Number Seven|url=http://www.nhc.noaa.gov/archive/2011/ep01/ep012011.discus.007.shtml?|publisher=National Hurricane Center|access-date=9 June 2011}}</ref> The storm subsequently entered a phase of [[rapid intensification]], developing a distinct [[Eye (cyclone)|eye]] with good [[Outflow (meteorology)|outflow]] aloft. That same day, Adrian attained [[Tropical cyclone#Classifications, terminology, and naming|major hurricane status]] several hundred miles off the coast of [[Cabo Corrientes, Jalisco|Cabo Corrientes]];<ref name="Adisc9">{{cite web|url=http://www.nhc.noaa.gov/archive/2011/ep01/ep012011.discus.009.shtml?|title=Hurricane Adrian Discussion Number Nine|author=Avila, Lixion A.|date=June 9, 2011|access-date=2011-06-09|publisher=National Hurricane Center}}</ref> it peaked in intensity as a [[Saffir–Simpson hurricane scale#Category 4|Category 4 storm]] shortly afterward, with sustained winds of {{convert|140|mph|km/h|abbr=on|round=5}}.<ref name=discuss11>{{cite web|url=http://www.nhc.noaa.gov/archive/2011/ep01/ep012011.discus.011.shtml?|title=Hurricane Adrian Discussion Number Eleven|publisher=National Hurricane Center|author=Stewart, Stacy|date=June 9, 2011|access-date=2011-06-10}}</ref> For several hours, the hurricane exhibited what appeared to be an [[Annular hurricane|annular structure]], maintaining an unusually large eye and symmetric central dense overcast. As a result, [[eyewall replacement cycle]]s were not expected to occur, and Adrian was forecast to remain well-organized and only slowly weaken in response to slightly cooler waters.<ref>{{cite web|url=http://www.nhc.noaa.gov/archive/2011/ep01/ep012011.discus.010.shtml?|title=Hurricane Adrian Discussion Number Ten|publisher=National Hurricane Center|author=Avila, Lixion A.|date=June 9, 2011|access-date=2011-06-09}}</ref> However, the hurricane defied predictions and began devolving rapidly the next day, likely due to "an unexpectedly early increase of vertical wind shear coupled with marginal [[Atmospheric thermodynamics|thermodynamics]]" as noted by the NHC. On June&nbsp;11, Adrian was downgraded to tropical storm status, recurving toward the west as a tight swirl of low-level clouds with little to no deep convection near its center.<ref name="Adrian17">{{cite web|url=http://www.nhc.noaa.gov/archive/2011/ep01/ep012011.discus.017.shtml?|title=Tropical Storm Adrian Discussion Number Seventeen|publisher=National Hurricane Center|date=June 11, 2011|access-date=2011-06-11|author=Landsea, Chris|author2=Avila, Lixion A.}}</ref><ref>{{cite web|url=http://www.nhc.noaa.gov/archive/2011/ep01/ep012011.discus.018.shtml?|title=Tropical Storm Adrian Discussion Number Eighteen|publisher=National Hurricane Center|date=June 11, 2011|access-date=2011-06-11|author=Avila, Lixion A.}}</ref>
It further weakened to a tropical depression the next day, and by 1500 UTC Adrian remained without convection and was declassified as a tropical cyclone while decelerating to the northwest.<ref name="Adrian20">{{cite web|url=http://www.nhc.noaa.gov/archive/2011/ep01/ep012011.public.020.shtml?|title=Tropical Depression Adrian Advisory Number 20|publisher=National Hurricane Center|date=June 12, 2011|access-date=2011-06-12|author=Cangialosi, John}}</ref><ref name="Adrian21">{{cite web|url=http://www.nhc.noaa.gov/archive/2011/ep01/ep012011.discus.021.shtml?|title=Post-tropical Cyclone Adrian Discussion Number 21|publisher=National Hurricane Center|author=Kimberlain, Todd|date=June 12, 2011|access-date=2011-06-12}}</ref> The outer rainbands of Hurricane Adrian brought widespread rainfall in Mexico.<ref>http://smn.cna.gob.mx/ciclones/tempo2011/pacifico/adrian1-p11.pdf{{dead link|date=June 2017 |bot=InternetArchiveBot |fix-attempted=yes }}</ref>
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===Hurricane Beatriz===
{{main|Hurricane Beatriz (2011)}}
{{Infobox hurricane small
| Basin=EPac
| Image=Tropical Storm Beatriz 2011-06-20 1740Z.jpg
| Track=Beatriz 2011 track.png
| Formed=June&nbsp;19
| Dissipated=June&nbsp;22
| 1-min winds=80
| Pressure=977
}}
On June&nbsp;14, the NHC noted a large area of scattered showers and thunderstorms associated with a [[monsoon trough]] over the east Pacific, several hundred miles from the coast of [[Acapulco, Mexico]].<ref>{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201106142357/index.php?basin=epac|title=NHC Graphical Outlook Archive|publisher=National Hurricane Center|author=Berg, Robbie|date=June 14, 2011|access-date=June 19, 2011}}</ref> A quasi-stationary surface low formed in association with the activity, and over the subsequent days convection consolidated in the vicinity of an [[high-pressure system|anticyclone]] over the southwestern Caribbean.<ref>{{cite web|url= http://www.nhc.noaa.gov/archive/gtwo/epac/201106172354/index.php?basin=epac |title=NHC Graphical Outlook Archive|publisher=National Hurricane Center|author=Berg, Robbie|date=June 17, 2011|access-date=June 19, 2011}}</ref> Curved [[rainband]]s began developing around the center, and on June&nbsp;19 the system acquired sufficient organization to be classified as a tropical depression. Turning toward the northwest along a weakness in the [[subtropical ridge]] to its north, the depression further strengthened within a favorable environment and was upgraded to Tropical Storm Beatriz at 1800&nbsp;UTC that day, with winds of {{convert|40|mph|km/h|abbr=on|round=5}}.<ref>{{cite web|url=http://www.nhc.noaa.gov/text/refresh/MIATCDEP2+shtml/191438.shtml|title=Tropical Depression TWO-E Discussion Number One|date=June 19, 2011|access-date=June 19, 2011|author=Brennan, Michael}}</ref><ref name=public1>{{cite web|url=http://www.nhc.noaa.gov/text/refresh/MIATCPEP2+shtml/191731.shtml|title=Tropical Storm Beatriz Public Advisory Number One|date=June 19, 2011|access-date=June 19, 2011|author=Brennan, Michael}}</ref>

Late on June&nbsp;20, Beatriz was upgraded to a hurricane, with winds of {{convert|75|mph|km/h|abbr=on|round=5}} and a pressure of {{convert|985|mbar|inHg|abbr=on}}. Beatriz continued to strengthen and reached winds of {{convert|90|mph|km/h|abbr=on|round=5}} and a pressure reading of {{convert|977|mbar|inHg|abbr=on}} while it neared the coast of Mexico. After moving along the coast, it weakened to a tropical storm and dissipated the next day. But the NHC noted that Beatriz's remnants still had a near 0% chance of redeveloping, as they remained almost stationary.<ref>{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201106221200/index.php?basin=epac&current_issuance=201106221200 |title=NHC Graphical Outlook Archive |publisher=National Hurricane Center |access-date=September 23, 2011}}</ref> But on June&nbsp;23, convection dissipated, and Beatriz's remnants slowly began to accelerate to the west, as the remnant low dissipated rapidly. Late on June&nbsp;24, the remnants of Hurricane Beatriz dissipated completely, to the southwest of the [[Baja California]] Peninsula.<ref>{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201106250537/index.php?basin=epac&current_issuance=201106250537 |title=NHC Graphical Outlook Archive |publisher=National Hurricane Center |access-date=September 23, 2011}}</ref>

Several landslides blocked off roads and a {{convert|100|m|ft|abbr=on}} section of a roundabout was destroyed.<ref>{{cite web|author=Unattributed|publisher=La Jordana|date=June 21, 2011|access-date=June 21, 2011|title=Beatriz se vuelve huracán y causa daños en Acapulco|url=http://www.jornada.unam.mx/2011/06/21/index.php?section=estados&article=031n1est&partner=rss|language=es}}</ref> In the community of Amatillo, three people were killed after being washed away by flood waters.<ref name="Milenio1">{{cite web|author=Javier Trujillo |publisher=Milenio |date=June 21, 2011 |access-date=October 16, 2011 |title=Afectó huracán "Beatriz" más de 380 viviendas en Acapulco |url=http://www.milenio.com/cdb/doc/noticias2011/55bc1efc3134a830b6e246b4a747b625 |archive-url=https://archive.today/20130128172232/http://www.milenio.com/cdb/doc/noticias2011/55bc1efc3134a830b6e246b4a747b625 |url-status=dead |archive-date=January 28, 2013 |language=es }}</ref> Heavy rains from Beatriz caused the Sabana River to overflow its banks, placing 150 homes across 14 [[colonia (Mexico)|colonias]] under water.<ref>{{cite news|author=Adriana Covarrubias|title=Reportan tres muertos por huracán Beatriz|url=http://www.eluniversal.com.mx/notas/773994.html|access-date=October 16, 2011|newspaper=El Universal|date=June 21, 2011|language=es}}</ref>
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===Hurricane Calvin===
{{Infobox tropical cyclone small
| Basin=EPac
| Image=Calvin 250m Jul 9 2011 20.35(UTC).jpg
| Track=Calvin 2011 track.png
| Formed=July&nbsp;7
| Dissipated=July&nbsp;10
| 1-min winds=70
| Pressure=984
}}
On July&nbsp;5, an area of showers and thunderstorms formed south of the [[Gulf of Tehuantepec]] associated with a broad area of low pressure.<ref name="nhc0705">{{cite web|title=NHC Graphical Outlook Archive (1100 AM PDT July 5, 2011)|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201107051730/index.php?basin=epac&current_issuance=201107051730|work=[[National Hurricane Center|NHC]] Graphical Outlook Archive|publisher=[[National Hurricane Center]]|access-date=July 7, 2011}}</ref> The system slowly organized, and the National Hurricane Center designated the system Tropical Depression Three-E on July&nbsp;7. By the next day, the tropical depression gained enough organization to be named Calvin. Calvin strengthened into a hurricane and attained peak strength early on July&nbsp;9 before rapidly weakening later that day. Calvin degenerated into a remnant low early on July 10.<ref>{{cite news|title=Calvin weakens to a post-tropical remnant low over the Pacific|url=http://www.minews26.com/content/?p=8717|access-date=July 27, 2011|date=July 10, 2010}}</ref> During the next 3 days, Calvin's remnants quickly moved to the west, while dissipating rapidly. On July&nbsp;13, Calvin's remnants dissipated completely, just to the east of the Central Pacific Ocean.<ref>{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201107131131/index.php?basin=epac&current_issuance=201107131131 |title=NHC Graphical Outlook Archive |publisher=National Hurricane Center |access-date=September 23, 2011}}</ref>
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===Hurricane Dora===
{{main|Hurricane Dora (2011)}}
{{Infobox hurricane small
| Basin=EPac
| Image=File:Hurricane Dora July 21 1445Z.jpg
| Track=Dora 2011 track.png
| Formed=July&nbsp;18
| Dissipated=July&nbsp;24
| 1-min winds=135
| Pressure=929
}}
In the early morning hours of July&nbsp;14, a [[tropical wave]] had moved off the [[Colombia]]n coast.<ref name=0200july14gtwo>{{cite web|title=Graphical Tropical Weather Outlook – 2:00&nbsp;am, July 14|date=July 14, 2011|author=Beven, Jack|url=http://www.nhc.noaa.gov/archive/gtwo/atl/201107140500/index.php?basin=atl&current_issuance=201107140500|publisher=National Hurricane Center|access-date=July 25, 2011}}</ref> The wave gained [[convection]] as it moved into the southwestern Caribbean, and the [[National Hurricane Center]] (NHC) began to monitor the disturbance, giving it a 10% chance of development into a tropical cyclone.<ref name=1400july13gtwo>{{cite web|title=Graphical Tropical Weather Outlook – 2:00&nbsp;pm, July 14|author=Cangialosi, John|date=July 14, 2011|url=http://www.nhc.noaa.gov/archive/gtwo/atl/201107141734/index.php?basin=atl&current_issuance=201107141734|publisher=National Hurricane Center|access-date=July 25, 2011}}</ref> Over the rest of the day, the storm continued to move westward until it moved ashore on the [[Nicaragua]]/[[Costa Rica]] border the next day.<ref name=1400july15gtwo>{{cite web|title=Graphical Tropical Weather Outlook – 2:00&nbsp;pm, July 15|url=http://www.nhc.noaa.gov/archive/gtwo/atl/201107151748/index.php?basin=atl&current_issuance=201107151748|author=Stewart, Stacy|date=July 15, 2011|publisher=National Hurricane Center|access-date=July 25, 2011}}</ref> On July&nbsp;16, the National Hurricane Center began monitoring the area of low pressure off the coast of Guatemala. Slowly organizing, the low-pressure area had gained enough strength to be declared Tropical Depression Four-E during the morning hours of July&nbsp;18.<ref>{{cite web|last=Stewart|title=Tropical Depression FOUR-E Advisory Number 1|url=http://www.nhc.noaa.gov/archive/2011/ep04/ep042011.public.001.shtml?|work=National Hurricane Center|access-date=July 25, 2011}}</ref> Just three hours later, the system was upgraded to Dora, the fourth tropical storm of the 2011 Pacific hurricane season.<ref>{{cite web|last=Stewart|title=Tropical Storm Dora Tropical Cyclone Update|url=http://www.nhc.noaa.gov/archive/2011/ep04/ep042011.update.07181800.shtml?|work=National Hurricane Center|access-date=July 25, 2011}}</ref> Continuing to organize, Dora reached hurricane strength late on July&nbsp;20,<ref>{{cite web|last=Brown|title=Hurricane Dora Advisory Number 7|url=http://www.nhc.noaa.gov/archive/2011/ep04/ep042011.update.07181800.shtml?|work=National Hurricane Center|access-date=July 25, 2011}}</ref> before rapidly intensifying into a major hurricane later the next day. Strengthening further, Dora reached a peak of {{convert|155|mph|km/h|abbr=on|round=5}} early on July 21, making it a Category 4 hurricane on the [[Saffir–Simpson hurricane scale]]. However, after entering cooler waters, Dora began to weaken the next day. On July&nbsp;23, Dora was downgraded to a tropical storm, and the next day, Dora was no longer a tropical cyclone.<ref>{{cite web|last=Pasch|title=Post-Tropical Cyclone Dora Advisory Number 26|url=http://www.nhc.noaa.gov/archive/2011/ep04/ep042011.public.026.shtml?|work=National Hurricane Center|access-date=July 25, 2011}}</ref> As a [[remnant low]], the circulation began to curve around the high-pressure area that had steered Dora for much of its existence on July 25.<ref name=postdoraimage>{{cite web|title=07/25/11 1200z 04E Dora|url=https://www.nrlmry.navy.mil//tcdat/tc11/EPAC/04E.DORA/vis/geo/1km/20110725.2045.goes13.x.vis1km.04EDORA.20kts-1008mb-255N-1147W.100pc.jpg|date=July 25, 2011|publisher=United States Naval Research Laboratory|access-date=July 25, 2011}}</ref> Early on July&nbsp;26, the remnants of Hurricane Dora dissipated completely, over Central [[Baja California]].<ref>{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201107260531/index.php?basin=epac&current_issuance=201107260531 |title=NHC Graphical Outlook Archive |publisher=National Hurricane Center |access-date=September 23, 2011}}</ref>
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===Hurricane Eugene===
{{Infobox tropical cyclone small
| Basin=EPac
| Image=Hurricane Eugene Aug 3 2011 2110Z.jpg
| Track=Eugene 2011 track.png
| Formed=July 31
| Dissipated=August 6
| 1-min winds=120
| Pressure=942
}}
On early July 31, a tropical wave developed into a tropical depression in the eastern Pacific a few hundred miles south of Mexico. Meteorologists numbered it "Five-E". It was upgraded to Tropical Storm Eugene only 6 hours after becoming a tropical depression. On the afternoon of August 1, Eugene strengthened into a Category 1 hurricane on the Saffir–Simpson hurricane scale. The next day Eugene further strengthened into a Category 2 hurricane. Early on August 3 Eugene further strengthened into a Category 3 hurricane, making it the third major hurricane of the season. Eugene was expected to weaken after becoming a Category 3. However, on the afternoon of August 3, Eugene strengthened into a Category 4 hurricane on the [[Saffir–Simpson hurricane scale]] with winds up to {{convert|140|mph|km/h|abbr=on|round=5}}. Eugene only maintained Category 4 status briefly, and only six hours later, the hurricane weakened to a Category 3 with winds up to {{convert|125|mph|km/h|abbr=on|round=5}}. Eugene quickly weakened on August 5 because of unfavorable conditions, dropping from Category 2 status to tropical storm status in only 18 hours. On August 6, Eugene became a post-tropical low as the center of the storm was void of strong convection.<ref>{{cite web|title=Tropical Storm Eugene Advisory 26 |url=http://www.stormpulse.com/pacific/message/201105/30/26 |archive-url=https://web.archive.org/web/20111006020535/http://www.stormpulse.com/pacific/message/201105/30/26 |url-status=dead |archive-date=October 6, 2011 |date=August 26, 2011 |access-date=August 26, 2011 }}</ref> During the next few days, Eugene's remnants continued to move westward slowly, while weakening gradually. On August 10, the remnants of Hurricane Eugene dissipated roughly 980&nbsp;mi (1,555&nbsp;km) east of Hawaii.<ref>{{cite web|author=Eric S. Blake|work=National Hurricane Center|publisher=National Oceanic and Atmospheric Administration|date=September 6, 2011|access-date=September 21, 2011|title=Tropical Cyclone Report: Hurricane Eugene|url={{NHC TCR url|id=EP052011_Eugene}}|format=PDF}}</ref>
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===Tropical Storm Fernanda===
{{Infobox tropical cyclone small
| Basin=EPac
| Image=Tropical Storm Fernanda Aug 16 2011 2215Z.jpg
| Track=Fernanda 2011 track.png
| Formed=August 15 
| Dissipated=August 20
| 1-min winds=60
| Pressure=992
|stormarticle=
}}
The tropical wave that spawned [[Tropical Storm Emily (2011)|Tropical Storm Emily]] in the Atlantic Ocean crossed Central America into the East Pacific on August 6. Producing disorganized deep convection, a surface circulation became discernible on August 13, and the formation of showers and thunderstorms in curved bands around the circulation signified the formation of Tropical Depression Six-E by 18:00 UTC on August 15, about 1,400 nautical miles east-southeast of [[Hawai'i]]. An increase deep convection resulted in the depression strengthening into Tropical Storm Fernanda at 6:00 UTC the next morning. A relaxation in shear allowed Fernanda to become more organized and reach an intensity of 45 knots (50&nbsp;mph) later that day. Fernanda initially moved west under the influence of a subtropical ridge, but it turned northwest through a weakness in the ridge on August 17 into more favorable conditions and strengthened to a peak intensity of 70&nbsp;mph winds and a minimum pressure of 992 millibars at 6:00 UTC on August 18. Fernanda was the only named storm this season not to clear hurricane strength.

Shortly after reaching peak intensity, the storm crossed into the Central Pacific basin. Continuing west-northwestward, Fernanda began weakening late on August 18 as dry, stable air was entrained into its circulation and it encountered increasing south-southeasterly shear. Most of Fernanda's deep convection had dissipated by August 20, and it degenerated to a remnant low. The post-tropical low continued westward before dissipating the next day a couple hundred nautical miles south of the Hawaiian Islands.<ref name="FernandaTCR">{{cite report|author=Todd B. Kimberlain|publisher=National Hurricane Center|date=December 3, 2012|access-date=March 14, 2021|title=Tropical Storm Fernanda (EP062011)|series=Tropical Cyclone Report|url=https://www.nhc.noaa.gov/data/tcr/EP062011_Fernanda.pdf}}</ref>
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===Hurricane Greg===
{{Infobox tropical cyclone small
| Basin=EPac
| Image=Hurricane_Greg_Aug_18_2011_2025Z.jpg
| Track=Greg 2011 track.png
| Formed=August 16
| Dissipated=August 21
| 1-min winds=75
| Pressure=979
|stormarticle=
}}
On the afternoon of August 16, a vigorous area of low pressure developed into Tropical Depression Seven-E. It was upgraded to Tropical Storm Greg 12 hours after formation.<ref>{{cite web|title=Hurricane Greg|url=http://forum.netweather.tv/topic/70713-hurricane-greg/|access-date=August 16, 2011}}</ref> The storm steadily intensified over {{convert|85|F|C|abbr=on}} [[sea surface temperatures]] and it reached hurricane status late on August 17 with maximum sustained winds of 75&nbsp;mph. Greg continued strengthening to attain peak winds of 85&nbsp;mph and a pressure of 980 mbar.<ref>{{cite web|title=Hurricane Greg strengthens a little in the Pacific|url=http://www.cosmostv.org/2011/08/hurricane-greg-strengthens-little-in.html|publisher=Tap Taru|access-date=August 19, 2011}}</ref> Soon afterward, the storm began to gradually weaken due to cooler waters and higher wind shear and on August 19, Greg weakened to tropical storm strength, with maximum sustained winds of 65&nbsp;mph.<ref>{{cite news|title=Tropical Depression Approaches Honduras; Hurricane Greg Weakens|newspaper=Bloomberg.com|date=19 August 2011|url=https://www.bloomberg.com/news/2011-08-19/storm-to-hit-honduras-as-hurricane-greg-weakens-in-pacific.html|publisher=Conor Sullivan|access-date=August 20, 2011}}</ref> The storm continued to weaken as it encountered unfavorable wind shear and as it began to traverse cooler waters, and on August 20 Greg had weakened to a tropical depression. Greg maintained tropical depression status until August 21, when it degenerated into a remnant low.<ref>{{cite web|author=Forcaster Kimberlain|title=Post-Tropical Cyclone Greg Advisory Number 20|url=http://www.nhc.noaa.gov/text/refresh/MIATCPEP2+shtml/190255.shtml|date=August 21, 2011|publisher=National Hurricane Center|access-date=August 21, 2011}}</ref>{{Failed verification|date=January 2013|reason=This URL is about Cyclone Rosa??}} During that day, Greg's remnants moved northeastward due to a High Pressure System. From late on August 22, until the early afternoon of August 23, Greg's remnants impacted [[Southern California]], bringing overcast skies, even though the center of circulation itself moved southeastward slowly and was positioned far southwest of Southern California.<ref>{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201108220546/index.php?basin=epac&current_issuance=201108220546 |title=NHC Graphical Outlook Archive |publisher=Nhc.noaa.gov |access-date=September 23, 2011}}</ref> Greg's remnants continued to drift westwards, as they weakened rapidly. Late on August 24, the remnants of Hurricane Greg dissipated completely, far west of the southern tip of the [[Baja California]] Peninsula.<ref name=autogenerated1>{{Cite web |url=http://www.nhc.noaa.gov/tafb/PACFUL_18Z.gif |title=Archived copy |access-date=2011-08-25 |archive-date=2011-10-16 |archive-url=https://web.archive.org/web/20111016134158/http://www.nhc.noaa.gov/tafb/PACFUL_18Z.gif |url-status=dead }}</ref>
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===Tropical Depression Eight-E===
{{Infobox tropical cyclone small
| Basin=EPac
| Image=8-E Aug 31 2011 1955Z.jpg
| Track=08-E 2011 track.png
| Formed=August 31
| Dissipated=September 1
| 1-min winds=30
| Pressure=1002
}}
The [[National Hurricane Center]] (NHC) began to monitor an area of disturbed weather southwest of the [[Mexican Riviera]] in late August. Initially, poorly organized, environmental conditions were conductive for some development.<ref name=TWO1>{{cite web|author=Todd Kimberlain|title=Tropical Weather Outlook|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201108291749/index.php?basin=epac&current_issuance=201108291749|publisher=[[National Hurricane Center]]|access-date=August 29, 2011|date=August 29, 2011}}</ref> Shortly thereafter, the cloud patterns improved and overall thunderstorm activity increased.<ref name=TWO2>{{cite web|author=Robbie Berg|title=Tropical Weather Outlook|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201108292338/index.php?basin=epac&current_issuance=201108292338|publisher=[[National Hurricane Center]]|access-date=August 29, 2011|date=August 29, 2011}}</ref> Thunderstorm activity become more concentrated two days later while located {{convert|60|mi|km|abbr=on}} south of Zinhuatnejo, and the NHC noted that the disturbance could become a tropical depression within hours.<ref>{{cite web|title=Tropical Weather Outlook|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201108310548/index.php?basin=epac&current_issuance=201108310548|publisher=[[National Hurricane Center]]|access-date=August 30, 2011|date=August 31, 2011}}</ref> This held true, and at 1500 [[UTC]] August 31, the low was upgraded into a tropical depression, but no further intensification was anticipated.<ref>{{cite web|title=Tropical Depression One-E Discussion 1|url=http://www.nhc.noaa.gov/archive/2011/ep08/ep082011.disc.001.shtml?|publisher=[[National Hurricane Center]]|access-date=August 31, 2011|date=August 31, 2011}}</ref>
Eight-E soon made landfall on Southwestern Mexico, and moved north-northwestwards, as it rapidly weakened. Eight-E dissipated to a remnant low several hours later, early on September 1.<ref>{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201109010538/index.php?basin=epac&current_issuance=201109010538 |title=NHC Graphical Outlook Archive |publisher=Nhc.noaa.gov |access-date=September 23, 2011}}</ref> However, the remnants of Tropical Depression Eight-E survived, and they as they began moving westward, the remnants impacted Western Mexico. During the early afternoon of September 1, the remnants of Eight-E moved off the western coast of Western Mexico. During the next day, the remnants strengthened slightly in intensity, as it moved northwestward, towards the Baja California Peninsula. But late on September 2, the remnants of Tropical Depression Eight-E dissipated completely, just southeast of the peninsula.
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===Hurricane Hilary===
{{Infobox tropical cyclone small
| Basin=EPac
| Image=Hilary 2011-09-23 2000Z.jpg
| Track=Hilary 2011 track.png
| Formed=September 21
| Dissipated=September 30
| 1-min winds=125
| Pressure=942
}}
{{Main|Hurricane Hilary (2011)}}
A tropical disturbance gained enough organization early on September 21 to be declared as a [[tropical cyclone|tropical depression]], the ninth of the season. Continuing to organize, the depression strengthened into a tropical storm several hours later. On September 22, the [[meteorologists]] declared Hilary as a [[Category 1 hurricane]], becoming the seventh of the season. On September 22, it rapidly strengthened into a small, Category 4 hurricane, featuring a well-defined [[eye (cyclone)|eye]] and very deep convection. It later reached a peak intensity of {{convert|145|mph|km/h|abbr=on|round=5}} at 0600 UTC September 23 (11 p.m. AST September 22). However, the storm began to enter an area of higher wind shear and cooler [[ocean temperature]]s on September 24, and Hilary began to weaken. The hurricane weakened back down to a Category 3 hurricane early on September 25, but was later upgraded briefly to a Category 4 again the following afternoon.<ref>{{cite web|last=Brennan|first=Michael|title=Hurricane Hilary Public Advisory #17|url=http://www.nhc.noaa.gov/archive/2011/ep09/ep092011.public.017.shtml?|work=National Hurricane Center|access-date=September 30, 2011}}</ref><ref>{{cite web|last=Brennan|first=Michael|title=Hurricane Hilary Public Advisory #23|url=http://www.nhc.noaa.gov/archive/2011/ep09/ep092011.public.023.shtml?|work=National Hurricane Center|access-date=September 30, 2011}}</ref> Several hours later, the storm was once again downgraded into a Category 3 hurricane, and during the afternoon hours of September 27, Hilary was further downgraded into a Category 2 hurricane. Early the following morning, Hilary weakened into a Category 1 hurricane, and weakened into a tropical storm on September 28.<ref>{{cite web|last=Brown|first=Daniel|title=Tropical Storm Hilary Public Advisory #32|url=http://www.nhc.noaa.gov/archive/2011/ep09/ep092011.public.032.shtml?|work=National Hurricane Center|access-date=September 30, 2011}}</ref>  Losing a lot of its convection on September 30, the National Hurricane Center noted that Hilary had weakened into a tropical depression. Several hours later, after sustaining no deep convection atop its centre, Hilary was declared a [[remnant low]], located several hundred miles away from any landmasses. Over the next 3 days Hilary's remnant low subsequently moved towards the southwest, before dissipating after 1200&nbsp;UTC on October 3, about {{Convert|1050|mi|km|round=5|abbr=on}} to the west of the southern tip of Baja California.<ref>{{cite report|type=Tropical Cyclone Report |author1=Beven II, John L |author2=Landsea, Christopher W |title=Hurricane Hilary 2011 |url={{NHC TCR url|id=EP092011_Hilary}} |author3=National Hurricane Center |access-date=February 16, 2015 |date=January 20, 2012 |publisher=National Oceanic and Atmospheric Administration's National Weather Service |archive-url=https://www.webcitation.org/6I4chKhmF?url=http://www.nhc.noaa.gov/data/tcr/EP092011_Hilary.pdf |archive-date=July 13, 2013 |url-status=live }}</ref>

[[Tropical cyclone warnings and watches]] were also issued for portion of the coast. Large swells were also expected.<ref>{{cite web|title=Hurricane forms off Mexico's Pacific coast |url=http://wires.univision.com/english/article/2011-09-22/hurricane-hilary-forms-off-mexicos-2 |archive-url=https://web.archive.org/web/20120323161442/http://wires.univision.com/english/article/2011-09-22/hurricane-hilary-forms-off-mexicos-2 |url-status=dead |archive-date=March 23, 2012 |publisher=Univision |access-date=September 23, 2011 |date=September 22, 2011 }}</ref> A red (emergency) alert was issued for parts of the coast. Officials urged residents to be prepared to evacuate. The port of [[Acapulco]] was closed for small craft. A moderate to high alert of rain and wind was noted.<ref>{{cite web|title=Moderate to strong Potential occurrence of rainfall and conditions of the Hurricane "Hilary" category II |url=http://seguridadgro.gob.mx/en/14168 |archive-url=https://archive.today/20120713152732/http://seguridadgro.gob.mx/en/14168 |url-status=dead |archive-date=July 13, 2012 |publisher=Guerro Department of Public Safety |access-date=September 23, 2011 |date=September 22, 2011 }}</ref> The storm's [[rainband|outer bands]] produced heavy rainfall over [[Chiapas]] and [[Tabasco]], with accumulations in Tabasco reaching {{convert|8.58|in|mm|abbr=on}} in 24&nbsp;hours.<ref>{{cite web|publisher=Tabasco Hoy |date=September 22, 2011 |access-date=September 23, 2011 |title='Hilary' evoluciona a huracán y manda lluvias a Tabasco |url=http://www.tabascohoy.com/noticia.php?id_nota=221752 |language=es |url-status=dead |archive-url=https://web.archive.org/web/20110930093817/http://www.tabascohoy.com/noticia.php?id_nota=221752 |archive-date=September 30, 2011 }}</ref> Several rivers across the region overflowed their banks and flooded nearby areas. In [[Villahermosa]], heavy rain collapsed drains and many streets were flooded. In addition, cars were stranded in floodwaters. Across [[Colima]], waves reached {{convert|9|to|15|ft|m|abbr=on}}.<ref name=CFEW>{{cite web|title=Piden extremar medidas ante fortaleza de "Hilary"|url=http://www.eluniversal.com.mx/estados/82189.html|work=El Universal Daily News|access-date=September 23, 2011|date=September 23, 2011|language=es}}</ref> 
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===Hurricane Jova===
{{Main|Hurricane Jova (2011)}}
{{Infobox tropical cyclone small
| Basin=EPac
| Image=Jova.250m Oct 10 2011 1740(UTC).jpg
| Track=Jova 2011 track.png
| Formed=October 6
| Dissipated=October 13
| 1-min winds=110
| Pressure=955
|stormarticle=
}}
During the late hours of October 4, an area of [[Atmospheric convection|showers and thunderstorms]] associated with a broad [[low-pressure area]] developed several hundred miles to the south-southwest of [[Acapulco, Mexico]]. Moving slowly towards the west, the area of disturbed weather quickly organized. Late on October 5, the National Hurricane Center (NHC) noted that the area had a high chance of developing into a tropical cyclone over the next 48 hours. Just several hours later, the NHC began issuing advisories on Tropical Depression Ten-E, several hundred miles to the south of Manzanillo, Mexico. A more gradual type of development took place after then, and the depression was upgraded into Tropical Storm Jova on the afternoon of October 6. Taking advantage of the favorable environment Jova was embedded within, the storm became a hurricane on October 8, and by October 10, the storm was upgraded to a Category 3 hurricane on the Saffir–Simpson hurricane scale. However, shortly thereafter, the storm began an [[eyewall replacement cycle]] and weakened to a lower-end Category 2 hurricane. Several hours after landfall in Mexico, Jova dissipated, very early on October 13.<ref>{{NHC TCR url|id=EP102011_Jova}}</ref>
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===Hurricane Irwin===
{{Infobox hurricane small
| Basin=EPac
| Image=Hurricane Irwin Oct 7 2011 1850Z.jpg
| Track=Irwin 2011 track.png
| Formed=October 6
| Dissipated=October 16
| 1-min winds=85
| Pressure=976
}}
The origins of Hurricane Irwin can be tracked back to an area of showers and thunderstorms associated with a low-pressure area that developed several hundred miles to the south of Mexico. Moving towards the west and west-northwest, the low pressure quickly gained organization, and during the pre-dawn hours of October 6, the National Hurricane Center began issuing advisories on newly formed Tropical Depression Eleven-E. Later on October 6, Tropical Depression Eleven-E strengthened to Tropical Storm Irwin, and it became a hurricane the next day. The next day it weakened to a tropical storm. Unlike most tropical cyclones that form in the eastern Pacific Ocean, Irwin's track was very unusual. The system which originally started moving westward, turned north, then east and again back south, and east until dissipation, on October 17, as a remnant low. Also, between October 11 and 14, Irwin weakened into a [[Saffir–Simpson hurricane scale|tropical depression]] twice and again re-strengthened back to a tropical storm before finally weakening into a tropical depression on October 15. The depression turned west again and dissipated into a remnant low in the late hours of October 16. But the remnants of Tropical Storm Irwin continued to move westward generally, until it dissipated completely, on October 17.<ref>{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201110171140/index.php?basin=epac&current_issuance=201110171140|title=NHC Graphical Outlook Archive|website=www.nhc.noaa.gov|access-date=8 April 2018}}</ref>
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===Tropical Depression Twelve-E===
{{Main|Tropical Depression Twelve-E (2011)}}
{{Infobox tropical cyclone small
| Basin=EPac
| Image=12-E Oct 12 2011 1715Z.jpg
| Track=12-E 2011 track.png
| Formed=October 12
| Dissipated=October 12
| 1-min winds=30
| Pressure=1004
|stormarticle=
}}
A tropical wave, the same that spawned Hurricane Phillipe in the Atlantic, crossed Central America into the East Pacific on October 5, during a significant pulse of the MJO. In this favorable environment, the wave generated a low-pressure area in the ITCZ by 18:00 UTC on October 6. Despite initially being hindered by the development of easterly wind shear, the low produced sustain deep convection late on October 11, and organized sufficiently to become Tropical Depression Twelve-E by 00:00 UTC on October 12. The depression moved northward without strengthening and made landfall at 16:00 UTC that day near Paredón, Mexico. The depression rapidly weakened to a remnant low eight hours later and dissipated completely early the next day.

The depression brought torrential rains that caused severe flooding in southeast Mexico and neighboring [[Guatemala]]. Up to 12 inches (305&nbsp;mm) of rain fell in Guatemala, though not all of it may be because of Twelve-E. 36 deaths were directly attributed to the depression by the government of Guatemala. Numerous additional fatalities resulted in Central America from the pulse of the MJO that helped spawn the depression.<ref name="12ETCR">{{cite report|author=Todd B. Kimberlain|publisher=National Hurricane Center|date=January 5, 2012|access-date=March 14, 2021|title=Tropical Depression Twelve-E (EP122011)|series=Tropical Cyclone Report|url=https://en.wikipedia.org/w/index.php?title=2011_Pacific_hurricane_season&action=edit&section=9}}</ref>
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===Hurricane Kenneth===
{{Infobox tropical cyclone small
| Basin=EPac
| Image=Hurricane Kenneth Nov 22 2011 1800Z.jpg
| Track=Kenneth 2011 track.png
| Formed=November 19
| Dissipated=November 25
| 1-min winds=125
| Pressure=940
| stormarticle=
}}
Kenneth originated from an area full of unsettled weather that developed off the coast of [[Guatemala]] on November 16.<ref name="TWO 10AM Nov 16">{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201111161741/index.php?basin=epac&current_issuance=201111161741|title=Tropical Weather Outlook 1000 AM PST Wed Nov 16 2011|last=Kimberlain|first=Todd|date=2011-11-16|publisher=[[National Hurricane Center]]|access-date=2011-11-22|location=Miami, Florida}}</ref> A [[low-pressure area]] formed shortly thereafter,<ref name="TWO 4PM Nov 16">{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201111162338/index.php?basin=epac&current_issuance=201111162338|title=Tropical Weather Outlook 400 PM PST Wed Nov 16 2011|last=Blake|first=Eric|date=2011-11-16|publisher=[[National Hurricane Center]]|access-date=2011-11-22|location=Miami, Florida}}</ref> and organization of the system began to improve on November 17 as it moved westward.<ref name="TWO 4PM Nov 17">{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201111172330/index.php?basin=epac&current_issuance=201111172330|title=Tropical Weather Outlook 400 PM PST Thu Nov 17|last=Blake|first=Eric|date=2011-11-17|publisher=[[National Hurricane Center]]|access-date=2011-11-22|location=Miami, Florida}}</ref> The low remained over an area with favorable conditions for formation on November 18,<ref name="TWO 4AM Nov 18">{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201111181153/index.php?basin=epac&current_issuance=201111181153|title=Tropical Weather Outlook 400 AM PST Fri Nov 18 2011|last=Berg|first=Robbie|date=2011-11-18|publisher=[[National Hurricane Center]]|access-date=2011-11-22|location=Miami, Florida}}</ref> although [[atmospheric convection|convective activity]] tapered slightly later during the day as it began to curve west-northwestward.<ref name="TWO 10AM Nov 18">{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201111181734/index.php?basin=epac&current_issuance=201111181734|title=Tropical Weather Outlook 1000 AM PST Fri Nov 18 2011|last=Berg|first=Robbie|date=2011-11-18|publisher=[[National Hurricane Center]]|access-date=2011-11-23|location=Miami, Florida}}</ref> The system continued to coalesce overnight,<ref name="TWO 10PM PST Nov 18">{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201111190544/index.php?basin=epac&current_issuance=201111190544|title=Tropical Weather Outlook 1000 PM PST Fri Nov 18 2011|last=Beven|first=Jack|date=2011-11-18|publisher=[[National Hurricane Center]]|access-date=2011-11-23|location=Miami, Florida}}</ref> and the circulation of the low was more prominent by the following morning.<ref name="TWO 10AM Nov 19">{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201111191757/index.php?basin=epac&current_issuance=201111191757|title=Tropical Weather Outlook 1000 AM PST Sat Nov 19|last=Berg|first=Robbie|date=2011-11-19|publisher=[[National Hurricane Center]]|access-date=2011-11-23|location=Miami, Florida}}</ref> By November 19, the disturbance had gained enough organization to be declared as a tropical depression, the thirteenth of the season. The following day, the depression continued to intensify, and was upgraded to a tropical storm, receiving the name ''Kenneth''.<ref>{{cite web|url=https://www.nhc.noaa.gov/archive/2011/ep13/ep132011.public.005.shtml?|title=Tropical Storm KENNETH Advisory 5|date=2011-11-20|publisher=[[National Hurricane Center]]|access-date=2015-08-08}}</ref> Rapid strengthening began on November 21, and Kenneth was upgraded to a hurricane.<ref>{{cite web|url=https://www.nhc.noaa.gov/archive/2011/ep13/ep132011.public.008.shtml|title=Hurricane KENNETH Advisory 8|date=2011-11-21|publisher=[[National Hurricane Center]]|access-date=2015-08-08}}</ref> As rapid intensification continued, Kenneth strengthened into a Category 3 major hurricane with sustained winds of 125&nbsp;mph on November 22.<ref>{{cite web|url=https://www.kvue.com/story/news/2014/05/20/2290638/ |title=Kenneth becomes major hurricane in Pacific |date=2011-11-22 |publisher=KVUE.com |access-date=2015-08-08 }}{{dead link|date=June 2017 |bot=InternetArchiveBot |fix-attempted=yes }}</ref> Rapid intensification continued and the storm was upgraded to a Category 4 hurricane with sustained winds of 145&nbsp;mph, just a few hours later, as Kenneth reached its peak intensity.<ref>{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201111221746/index.php?basin=epac&current_issuance=201111221746|title=NHC Graphical Outlook Archive|website=www.nhc.noaa.gov|access-date=8 April 2018}}</ref> The cause for this rapid intensification just days before the end of the season was unclimatologically low wind shear as well as unusually warm waters directly in the storm's path. However, Kenneth's intensification was short-lived; immediately it moved into an environment of colder waters and stronger wind shear, and started to rapidly deteriorate. Just 24 hours after the cyclone reached its peak, it dropped below hurricane strength and lost most of its central convection. Afterwards, Kenneth weakened at a slower rate, but by November 25, had weakened to a tropical depression, losing almost all of its convection. Early on November 25, Kenneth weakened to a remnant low, with its circulation void of any strong convection. But for the next 3 days, the remnant of the storm continued moving northwestward rapidly as a convectionless vortex, before dissipating completely early on November 28.<ref>{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/latest/index.php?basin=epac&current_issuance=latest|title=NHC Graphical Outlook Archive|website=www.nhc.noaa.gov|access-date=8 April 2018}}</ref>

In the first discussion bulletin, Forecaster Robbie Berg commented that it was the latest-forming tropical cyclone in the North Pacific east of 140°W since Tropical Depression Twenty-Two-E on November 24, 1987,<ref>{{cite web|url=http://www.nhc.noaa.gov/archive/2011/ep13/ep132011.discus.001.shtml?|title=Tropical Depression Thirteen-E Forecast Discussion #1|work=National Hurricane Center|last=Berg|first=Robbie|date=November 19, 2011|access-date=November 19, 2011}}</ref> and Kenneth was the latest forming named storm since [[Hurricane Winnie (1983)|Winnie]] in 1983.<ref>{{cite web|title=Tropical Storm Kenneth Forecast Discussion #5|url=http://www.nhc.noaa.gov/archive/2011/ep13/ep132011.discus.005.shtml? |work=National HurricaneCenter|last=Kimberlain|first=Todd|date=November 20, 2011|access-date=November 20, 2011}}</ref> Kenneth strengthened to a major hurricane on November 22, becoming the latest-forming major hurricane in the eastern north Pacific basin in the [[satellite]] era.<ref>{{cite web|url=http://www.nhc.noaa.gov/archive/2011/ep13/ep132011.discus.008.shtml?|title=Hurricane Kenneth Forecast Discussion #8|work=National Hurricane Center|last=Kimberlain|date=November 21, 2011|access-date=November 21, 2011}}</ref> Kenneth was upgraded to Category 4 a few hours later, becoming the most powerful late-season storm ever recorded in the eastern north Pacific at the time.<ref>{{cite web|url=http://www.nhc.noaa.gov/archive/2011/ep13/ep132011.public.012.shtml?|title=Hurricane Kenneth Advisory #12|work=National Hurricane Center|last=Roberts/Brown|date=November 22, 2011|access-date=November 22, 2011}}</ref> However,  [[Hurricane Sandra (2015)|Hurricane Sandra]] in [[2015 Pacific hurricane season|2015]] surpassed both records when it attained major hurricane status much later than Kenneth, being upgraded to a Category 4 on November 26, 2015.
{{clear}}

==Storm names==
{{see also|Tropical cyclone naming#Eastern and Central Pacific Ocean}}
The following list of names was used for named storms that formed in the North Pacific Ocean east of [[140th meridian west|140°W]] in 2011.<ref name="names">{{cite web|url=http://www.nhc.noaa.gov/aboutnames.shtml|title=Worldwide Tropical Cyclone Names|date=March 16, 2011|publisher=National Hurricane Center|access-date=June 9, 2011|archive-url=https://web.archive.org/web/20101207184650/http://www.nhc.noaa.gov/aboutnames.shtml|archive-date=December 7, 2010 }}</ref> This is the same list used for the [[2005 Pacific hurricane season|2005 season]] as no [[List of retired Pacific hurricanes|names were retired]] afterwards by the [[World Meteorological Organization]].<ref name="Padgett 0305">{{cite web|last=Padgett|first=Gary|title=Monthly Global Tropical Cyclone Summary|date=March 2005|url=https://australiasevereweather.com/cyclones/2005/summ0503.htm|website=australiasevereweather.com|access-date=March 7, 2024}}</ref><ref>{{cite web|title=Tropical Cyclone Naming History and Retired Names|url=https://www.nhc.noaa.gov/aboutnames_history.shtml|publisher=National Hurricane Center|location=Miami, Florida|access-date=January 28, 2024}}</ref>

{| width="90%"
|
* [[Hurricane Adrian (2011)|Adrian]]
* [[Hurricane Beatriz (2011)|Beatriz]]
* Calvin
* [[Hurricane Dora (2011)|Dora]]
* Eugene
* Fernanda{{thin space}}*
* Greg
* [[Hurricane Hilary (2011)|Hilary]]
|
* Irwin
* [[Hurricane Jova (2011)|Jova]]
* Kenneth
* {{tcname unused|Lidia}}
* {{tcname unused|Max}}
* {{tcname unused|Norma}}
* {{tcname unused|Otis}}
* {{tcname unused|Pilar}}
|
* {{tcname unused|Ramon}}
* {{tcname unused|Selma}}
* {{tcname unused|Todd}}
* {{tcname unused|Veronica}}
* {{tcname unused|Wiley}}
* {{tcname unused|Xina}}
* {{tcname unused|York}}
* {{tcname unused|Zelda}}
|}

For storms that form in the North Pacific between 140°W to the [[International Date Line]], the names come from a series of four rotating lists. Names are used one after the other without regard to year, and when the bottom of one list is reached, the next named storm receives the name at the top of the next list.<ref name="names"/><ref name="Padgett 0305"/> No named storms formed within the area in 2011. Named storms in the table above that crossed into the area during the season are noted (*).<ref>{{cite report|last=Tanabe|first=Raymond|title=Review of the 2011 Central Pacific Tropical Cyclone Season and Verification|date=March 2012|url=https://www.icams-portal.gov/meetings/TCORF/ihc12/Presentations/01b-Session/06-IHC_2012_CPHC_Season_Review_2011.pdf|publisher=Central Pacific Hurricane Center|location=Honolulu, Hawaii|access-date=January 28, 2024}}</ref>

==Season effects==
This is a table of all of the tropical cyclones that formed in the 2011 Pacific hurricane season. It includes their name, duration (within the basin), peak classification and intensities, areas affected, damage, and death totals. Deaths in parentheses are additional and indirect (an example of an indirect death would be a traffic accident), but were still related to that storm. Damage and deaths include totals while the storm was extratropical, a wave, or a low, and all of the damage figures are in 2011 USD.
{{Saffir–Simpson small|align=center}}<div class="center">
{{TC stats table start3|year=2011|basin=Pacific hurricane}}
{{TC stats cyclone3|cat=cat4|name=[[Hurricane Adrian (2011)|Adrian]]|dates=June&nbsp;7–12|max-winds=140 (220)|min-press=944|areas=Southwestern Mexico|damage=Minimal|deaths=0}}
{{TC stats cyclone3|cat=cat1|name=[[Hurricane Beatriz (2011)|Beatriz]]|dates=June&nbsp;19–22|max-winds=90 (150)|min-press=977|areas=Southwestern Mexico, Western Mexico|damage=Minimal|deaths=4}}
{{TC stats cyclone3|cat=cat1|name=Calvin|dates=July&nbsp;7–10|max-winds=80 (130)|min-press=984|areas=None|damage=None|deaths=0}}
{{TC stats cyclone3|cat=cat4|name=[[Hurricane Dora (2011)|Dora]]|dates=July&nbsp;18–24|max-winds=155 (250)|min-press=929|areas=Southwestern Mexico, Western Mexico, [[Baja California Peninsula]], Southwestern United States|damage=Minimal|deaths=0}}
{{TC stats cyclone3|cat=cat4|name=Eugene|dates=July&nbsp;31&nbsp;– August 6|max-winds=140 (220)|min-press=942|areas=None|damage=None|deaths=0}}
{{TC stats cyclone3|cat=storm|name=Fernanda|dates=August&nbsp;15–19|max-winds=70 (110)|min-press=992|areas=None|damage=None|deaths=0}}
{{TC stats cyclone3|cat=cat1|name=Greg|dates=August&nbsp;16–21|max-winds=85 (140)|min-press=979|areas=None|damage=None|deaths=0}}
{{TC stats cyclone3|cat=depression|name=Eight-E|dates=August&nbsp;31 – September 1|max-winds=35 (55)|min-press=1002|areas=Southwestern Mexico, Western Mexico|damage=None|deaths=0}}
{{TC stats cyclone3|cat=cat4|name=[[Hurricane Hilary (2011)|Hilary]]|dates=September&nbsp;21–30|max-winds=145 (230)|min-press=942|areas=Southwestern Mexico|damage=Minimal|deaths=0}}
{{TC stats cyclone3|cat=cat3|name=[[Hurricane Jova (2011)|Jova]]|dates=October&nbsp;6–13|max-winds=125 (205)|min-press=955|areas=Southwestern Mexico, Western Mexico|damage=≥{{ntsp|203670000||$}}|deaths=9}}
{{TC stats cyclone3|cat=cat2|name=Irwin|dates=October&nbsp;6–16|max-winds=100 (155)|min-press=976
|areas=Western Mexico|damage=None|deaths=0}}
{{TC stats cyclone3|cat=depression|name=[[Tropical Depression Twelve-E (2011)|Twelve-E]]|dates=October&nbsp;12|max-winds=35 (55)|min-press=1004|areas=Southwestern Mexico, Central America|damage=Unknown|deaths=36}}
{{TC stats cyclone3|cat=cat4|name=Kenneth|dates=November&nbsp;19–25|max-winds=145 (230)|min-press=940
|areas=None|damage=None|deaths=0}}
{{TC stats table end3|num-cyclones=13|dates=June 7&nbsp;– November 25&nbsp;|max-winds=155 (250)|min-press=929|tot-areas=|tot-damage=≥{{ntsp|203670000||$}}|tot-deaths=49}}
</div>

==See also==
{{portal|Tropical cyclones}}
* [[Tropical cyclones in 2011]]
* [[List of Pacific hurricanes]]
* [[Pacific hurricane season]]
* [[2011 Atlantic hurricane season]]
* [[2011 Pacific typhoon season]]
* [[2011 North Indian Ocean cyclone season]]
* South-West Indian Ocean cyclone seasons: [[2010–11 South-West Indian Ocean cyclone season|2010–11]], [[2011–12 South-West Indian Ocean cyclone season|2011–12]]
* Australian region cyclone seasons: [[2010–11 Australian region cyclone season|2010–11]], [[2011–12 Australian region cyclone season|2011–12]]
* South Pacific cyclone seasons: [[2010–11 South Pacific cyclone season|2010–11]], [[2011–12 South Pacific cyclone season|2011–12]]
* [[South Atlantic tropical cyclone]]

==Notes==
{{Reflist|group=nb}}

==References==
{{reflist|2}}

==External links==
{{Commons category}}
* [http://www.nhc.noaa.gov National Hurricane Center Website]
* [https://web.archive.org/web/20120822015000/http://www.smn.cna.gob.mx/ Servicio Meteorológico Nacional Website] {{in lang|es}}
*[https://www.nhc.noaa.gov/data/tcr/index.php?season=2011&basin=epac NHC 2011 Pacific hurricane season archive]

{{2011 Pacific hurricane season buttons}}
{{TC Decades|Year=2010|basin=Pacific|type=hurricane}}
{{Tropical cyclone season|2011}}

[[Category:2011 Pacific hurricane season| ]]
[[Category:Pacific hurricane seasons]]
[[Category:Tropical cyclones in 2011|2011 Epac]]