2011 Pacific hurricane season

In advance of each Pacific hurricane season, forecasts of hurricane activity are issued by the United States National Oceanic and Atmospheric Administration (NOAA)'s Climate Prediction Center and Mexico's Servicio Meteorológico Nacional (SMN). These include weekly and monthly changes in significant factors that help determine the number of tropical storms, hurricanes, and major hurricanes within a particular year. According to NOAA, the average eastern Pacific hurricane season between 1981 and 2010 contained roughly 14 tropical storms, 7 hurricanes, 3 major hurricanes, with a near-normal accumulated cyclone energy (ACE) index of 113.{{cite report|work=Climate Prediction Center|url=http://www.cpc.ncep.noaa.gov/products/outlooks/background_information.shtml|archive-url=https://web.archive.org/web/20100603105643/http://www.cpc.noaa.gov/products/outlooks/background_information.shtml|title=Background Information: The North Atlantic Hurricane Season|publisher=National Oceanic and Atmospheric Administration|date=August 6, 2015|archive-date=June 3, 2010|access-date=January 19, 2017}} 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 {{Cvt|39|mph}}. NOAA typically categorizes a season as above-average, average, or below-average based on the cumulative ACE index, but the number of tropical storms, hurricanes, and major hurricanes within a hurricane season is sometimes also considered.

On May 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.{{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}}

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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 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.

Hilary became the second storm to form in September, becoming the fourth major hurricane of the season, during the afternoon hours of September 22. After Hilary, Jova unexpectedly became the fifth major hurricane of the season during the early morning hours of October 10. Tropical Depression Twelve-E killed 30 people in Central America when it made landfall near El Salvador on October 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 in 2015; the last to do so was 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 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 knots (38 mph, 61 km/h), divided by 10,000 while they are above that threshold; therefore, tropical depressions are not included.|group="nb"}}{{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}} 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}}.

{{main|Hurricane Adrian (2011)}}

{{Infobox hurricane small

| Basin=EPac

| Image=File:Adrian 2011-06-10 0000Z.png

| Track=Adrian 2011 track.png

| Formed=June 7

| Dissipated=June 12

| 1-min winds=120

| Pressure=944

}}

In early June, a well-defined area of low pressure produced disorganized weather several hundred miles from the Pacific coast of Mexico.{{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}} By June 7, the low developed sufficiently organized deep convection to be classified as a tropical cyclone, and the National Hurricane Center (NHC) designated it as Tropical Depression One-E at 1500 UTC, about {{convert|365|mi|km|abbr=on|round=5}} south of Acapulco. Upon developing, the depression was located over warm sea surface temperatures, and upper-level wind shear in its vicinity was forecast to remain conducive for intensification.{{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}} Caught in weak 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}}.{{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}}

Steady strengthening continued, and Adrian became a hurricane early on June 9 as it tracked toward the west-northwest along high pressure over Mexico.{{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}} The storm subsequently entered a phase of rapid intensification, developing a distinct eye with good outflow aloft. That same day, Adrian attained major hurricane status several hundred miles off the coast of Cabo Corrientes;{{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}} it peaked in intensity as a Category 4 storm shortly afterward, with sustained winds of {{convert|140|mph|km/h|abbr=on|round=5}}.{{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}} For several hours, the hurricane exhibited what appeared to be an annular structure, maintaining an unusually large eye and symmetric central dense overcast. As a result, eyewall replacement cycles were not expected to occur, and Adrian was forecast to remain well-organized and only slowly weaken in response to slightly cooler waters.{{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}} 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 thermodynamics" as noted by the NHC. On June 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.{{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.}}{{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.}}

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.{{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}}{{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}} The outer rainbands of Hurricane Adrian brought widespread rainfall in Mexico.http://smn.cna.gob.mx/ciclones/tempo2011/pacifico/adrian1-p11.pdf{{dead link|date=June 2017 |bot=InternetArchiveBot |fix-attempted=yes }}

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{{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 19

| Dissipated=June 22

| 1-min winds=80

| Pressure=977

}}

On June 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.{{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}} A quasi-stationary surface low formed in association with the activity, and over the subsequent days convection consolidated in the vicinity of an anticyclone over the southwestern Caribbean.{{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}} Curved rainbands began developing around the center, and on June 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 UTC that day, with winds of {{convert|40|mph|km/h|abbr=on|round=5}}.{{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}}{{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}}

Late on June 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.{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201106221200/index.php?basin=epac¤t_issuance=201106221200 |title=NHC Graphical Outlook Archive |publisher=National Hurricane Center |access-date=September 23, 2011}} But on June 23, convection dissipated, and Beatriz's remnants slowly began to accelerate to the west, as the remnant low dissipated rapidly. Late on June 24, the remnants of Hurricane Beatriz dissipated completely, to the southwest of the Baja California Peninsula.{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201106250537/index.php?basin=epac¤t_issuance=201106250537 |title=NHC Graphical Outlook Archive |publisher=National Hurricane Center |access-date=September 23, 2011}}

Several landslides blocked off roads and a {{convert|100|m|ft|abbr=on}} section of a roundabout was destroyed.{{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}} In the community of Amatillo, three people were killed after being washed away by flood waters.{{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 }} Heavy rains from Beatriz caused the Sabana River to overflow its banks, placing 150 homes across 14 colonias under water.{{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}}

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{{Infobox tropical cyclone small

| Basin=EPac

| Image=Calvin 250m Jul 9 2011 20.35(UTC).jpg

| Track=Calvin 2011 track.png

| Formed=July 7

| Dissipated=July 10

| 1-min winds=70

| Pressure=984

}}

On July 5, an area of showers and thunderstorms formed south of the Gulf of Tehuantepec associated with a broad area of low pressure.{{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¤t_issuance=201107051730|work=NHC Graphical Outlook Archive|publisher=National Hurricane Center|access-date=July 7, 2011}} The system slowly organized, and the National Hurricane Center designated the system Tropical Depression Three-E on July 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 9 before rapidly weakening later that day. Calvin degenerated into a remnant low early on July 10.{{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}} During the next 3 days, Calvin's remnants quickly moved to the west, while dissipating rapidly. On July 13, Calvin's remnants dissipated completely, just to the east of the Central Pacific Ocean.{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201107131131/index.php?basin=epac¤t_issuance=201107131131 |title=NHC Graphical Outlook Archive |publisher=National Hurricane Center |access-date=September 23, 2011}}

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{{main|Hurricane Dora (2011)}}

{{Infobox hurricane small

| Basin=EPac

| Image=File:Hurricane Dora July 21 1445Z.jpg

| Track=Dora 2011 track.png

| Formed=July 18

| Dissipated=July 24

| 1-min winds=135

| Pressure=929

}}

In the early morning hours of July 14, a tropical wave had moved off the Colombian coast.{{cite web|title=Graphical Tropical Weather Outlook – 2:00 am, July 14|date=July 14, 2011|author=Beven, Jack|url=http://www.nhc.noaa.gov/archive/gtwo/atl/201107140500/index.php?basin=atl¤t_issuance=201107140500|publisher=National Hurricane Center|access-date=July 25, 2011}} 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.{{cite web|title=Graphical Tropical Weather Outlook – 2:00 pm, July 14|author=Cangialosi, John|date=July 14, 2011|url=http://www.nhc.noaa.gov/archive/gtwo/atl/201107141734/index.php?basin=atl¤t_issuance=201107141734|publisher=National Hurricane Center|access-date=July 25, 2011}} 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.{{cite web|title=Graphical Tropical Weather Outlook – 2:00 pm, July 15|url=http://www.nhc.noaa.gov/archive/gtwo/atl/201107151748/index.php?basin=atl¤t_issuance=201107151748|author=Stewart, Stacy|date=July 15, 2011|publisher=National Hurricane Center|access-date=July 25, 2011}} On July 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 18.{{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}} Just three hours later, the system was upgraded to Dora, the fourth tropical storm of the 2011 Pacific hurricane season.{{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}} Continuing to organize, Dora reached hurricane strength late on July 20,{{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}} 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 23, Dora was downgraded to a tropical storm, and the next day, Dora was no longer a tropical cyclone.{{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}} 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.{{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|archive-url=https://web.archive.org/web/20171209044549/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|url-status=dead|archive-date=December 9, 2017|date=July 25, 2011|publisher=United States Naval Research Laboratory|access-date=July 25, 2011}} Early on July 26, the remnants of Hurricane Dora dissipated completely, over Central Baja California.{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201107260531/index.php?basin=epac¤t_issuance=201107260531 |title=NHC Graphical Outlook Archive |publisher=National Hurricane Center |access-date=September 23, 2011}}

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{{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.{{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 }} 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 mi (1,555 km) east of Hawaii.{{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}}

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{{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 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 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 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.{{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}}

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{{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.{{cite web|title=Hurricane Greg|url=http://forum.netweather.tv/topic/70713-hurricane-greg/|access-date=August 16, 2011}} 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 mph. Greg continued strengthening to attain peak winds of 85 mph and a pressure of 980 mbar.{{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}} 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 mph.{{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}} 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.{{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}}{{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.{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201108220546/index.php?basin=epac¤t_issuance=201108220546 |title=NHC Graphical Outlook Archive |publisher=Nhc.noaa.gov |access-date=September 23, 2011}} 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.{{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 }}

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{{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.{{cite web|author=Todd Kimberlain|title=Tropical Weather Outlook|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201108291749/index.php?basin=epac¤t_issuance=201108291749|publisher=National Hurricane Center|access-date=August 29, 2011|date=August 29, 2011}} Shortly thereafter, the cloud patterns improved and overall thunderstorm activity increased.{{cite web|author=Robbie Berg|title=Tropical Weather Outlook|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201108292338/index.php?basin=epac¤t_issuance=201108292338|publisher=National Hurricane Center|access-date=August 29, 2011|date=August 29, 2011}} 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.{{cite web|title=Tropical Weather Outlook|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201108310548/index.php?basin=epac¤t_issuance=201108310548|publisher=National Hurricane Center|access-date=August 30, 2011|date=August 31, 2011}} This held true, and at 1500 UTC August 31, the low was upgraded into a tropical depression, but no further intensification was anticipated.{{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}}

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.{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201109010538/index.php?basin=epac¤t_issuance=201109010538 |title=NHC Graphical Outlook Archive |publisher=Nhc.noaa.gov |access-date=September 23, 2011}} 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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{{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 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 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 temperatures 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.{{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}}{{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}} 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.{{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}} 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 UTC on October 3, about {{Convert|1050|mi|km|round=5|abbr=on}} to the west of the southern tip of Baja California.{{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 }}

Tropical cyclone warnings and watches were also issued for portion of the coast. Large swells were also expected.{{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 }} 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.{{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 }} The storm's outer bands produced heavy rainfall over Chiapas and Tabasco, with accumulations in Tabasco reaching {{convert|8.58|in|mm|abbr=on}} in 24 hours.{{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 }} 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}}.{{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}}

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{{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 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.{{NHC TCR url|id=EP102011_Jova}}

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{{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 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.{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201110171140/index.php?basin=epac¤t_issuance=201110171140|title=NHC Graphical Outlook Archive|website=www.nhc.noaa.gov|access-date=8 April 2018}}

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{{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 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.{{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§ion=9}}

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{{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.{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201111161741/index.php?basin=epac¤t_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}} A low-pressure area formed shortly thereafter,{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201111162338/index.php?basin=epac¤t_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}} and organization of the system began to improve on November 17 as it moved westward.{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201111172330/index.php?basin=epac¤t_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}} The low remained over an area with favorable conditions for formation on November 18,{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201111181153/index.php?basin=epac¤t_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}} although convective activity tapered slightly later during the day as it began to curve west-northwestward.{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201111181734/index.php?basin=epac¤t_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}} The system continued to coalesce overnight,{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201111190544/index.php?basin=epac¤t_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}} and the circulation of the low was more prominent by the following morning.{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201111191757/index.php?basin=epac¤t_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}} 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.{{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}} Rapid strengthening began on November 21, and Kenneth was upgraded to a hurricane.{{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}} As rapid intensification continued, Kenneth strengthened into a Category 3 major hurricane with sustained winds of 125 mph on November 22.{{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 }} Rapid intensification continued and the storm was upgraded to a Category 4 hurricane with sustained winds of 145 mph, just a few hours later, as Kenneth reached its peak intensity.{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/201111221746/index.php?basin=epac¤t_issuance=201111221746|title=NHC Graphical Outlook Archive|website=www.nhc.noaa.gov|access-date=8 April 2018}} 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.{{cite web|url=http://www.nhc.noaa.gov/archive/gtwo/epac/latest/index.php?basin=epac¤t_issuance=latest|title=NHC Graphical Outlook Archive|website=www.nhc.noaa.gov|access-date=8 April 2018}}

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,{{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}} and Kenneth was the latest forming named storm since Winnie in 1983.{{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}} 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.{{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}} 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.{{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}} However, Hurricane Sandra in 2015 surpassed both records when it attained major hurricane status much later than Kenneth, being upgraded to a Category 4 on November 26, 2015.

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{{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 140°W in 2011.{{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 }} This is the same list used for the 2005 season as no names were retired afterwards by the World Meteorological Organization.{{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}}{{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}}

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. 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 (*).{{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}}

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}}

{{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, 2011–12
• Australian region cyclone seasons: 2010–11, 2011–12
• South Pacific cyclone seasons: 2010–11, 2011–12
• South Atlantic tropical cyclone

{{Reflist|group=nb}}

{{reflist|2}}

{{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:Pacific hurricane seasons

2011 Epac