2019 Pacific hurricane season#Tropical Storm Octave

On May 15, 2019, the Servicio Meteorológico Nacional (SMN) issued its first forecast for the season, predicting a total of 19 named storms, 11 hurricanes, and six major hurricanes to develop. On May 23, the National Oceanic and Atmospheric Administration released its annual forecast, predicting a 70% chance of a near- to above-average season in both the Eastern and Central Pacific basins, with a total of 15–22 named storms, 8–13 hurricanes, and 4–8 major hurricanes. The reason for their outlook was the forecast of an El Niño to continue through the season, which reduces vertical wind shear across the basin and increases sea surface temperatures, favoring increased tropical cyclone activity. In addition, many global computer models expected a positive Pacific decadal oscillation (PDO), a phase of a multi-decade cycle that favored much warmer than average sea surface temperatures that had been ongoing since 2014 to continue, in contrast to the 1995–2013 period, which generally featured below-normal activity.{{Cite web | title=NOAA predicts above-normal 2019 hurricane season in the central Pacific| url=https://www.noaa.gov/media-release/noaa-predicts-above-normal-2019-hurricane-season-in-central-pacific| date=May 23, 2019 | publisher=National Oceanic and Atmospheric Administration | work=Climate Prediction Center}}

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File:Kiko, Mario and Lorena 2019-09-20 1720Z.jpg

The season officially began on May 15 in Eastern Pacific and on June 1 in Central Pacific; both ended on November 30.{{cite web|url=http://www.aoml.noaa.gov/hrd/tcfaq/G1.html|title=TCFAQ G1) When is hurricane season?|author=Neal Dorst|date=June 2, 2016|publisher=Atlantic Oceanographic and Meteorological Laboratory|access-date=July 24, 2018|archive-url=https://web.archive.org/web/20090506152735/http://www.aoml.noaa.gov/hrd/tcfaq/G1.html|archive-date=2009-05-06|url-status=live}} Initial activity was slow, with the first tropical depression forming on June 25.{{cite report|last1=Latto|first1=Andrew S.|last2=Brennan|first2=Michael|title=Tropical Storm Alvin Discussion Number 4|url=https://www.nhc.noaa.gov/archive/2019/ep01/ep012019.discus.004.shtml?|date=June 26, 2019|publisher=National Hurricane Center|location=Miami, Florida|access-date=June 25, 2023}} The strongest storm of the season, hurricane Barbara, reached peak intensity on July 2 as a high-end category 4 hurricane. The season became more active in July, with five tropical cyclones forming, including two storms that intensified into hurricanes. Among them was Hurricane Erick, which reached Category 4 status on July 31.{{cite report|url=https://www.nhc.noaa.gov/archive/text/TWSEP/2019/TWSEP.201908011637.txt|title=Monthly Eastern North Pacific Tropical Weather Summary|author=Hurricane Specialist Unit|date=August 1, 2019|publisher=National Hurricane Center|access-date=August 3, 2019}} This level of activity came to a halt in August, with only three named storms forming, none of which reached hurricane strength.

On the first day of September, Hurricane Juliette formed, becoming the third major hurricane of the season.{{Cite web|url=https://www.nhc.noaa.gov/archive/2019/ep11/ep112019.public.007.shtml?|title=Hurricane Juliette Advisory Number 7|website=www.nhc.noaa.gov|author=David Zelinsky|publisher=National Hurricane Center|location=Miami, Florida|date=September 2, 2019|access-date=September 2, 2019}} Moreover, tropical activity also began in the Central Pacific with the formation of Tropical Storm Akoni on September 3, which dissipated two days later. There were no tropical cyclones for five days until the formation of Hurricane Kiko on September 12 and the formation of Tropical Storm Mario and Hurricane Lorena five days later. In late September, Tropical Storm Narda became the sixth named storm to form during the month, tying the record for the most active September with the seasons of 1966, 1992, 1994, 1997, 2001 and 2005.

Three tropical storms formed in the month of October, the first one was Tropical Storm Ema which formed on October 12 in the Central Pacific, becoming the first such occurrence since 2016 in which more than one tropical cyclone was named in the basin. The second named storm of the month, Octave, formed on October 17 and dissipated two days later without threatening land. Priscilla formed on October 20 and later dissipated the next day while it brushed Western Mexico. In mid-November, Tropical Storm Raymond formed on November 15, just fifteen days before the season officially ended.

The accumulated cyclone energy (ACE) index for the 2019 Pacific hurricane season as calculated by Colorado State University using data from the National Hurricane Center was 97.7 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 {{convert|33|kn|mph 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}}

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{{Infobox hurricane small

| Basin = EPac

| Image = Alvin 2019-06-27 2055Z.jpg

| Track = Alvin 2019 track.png

| Formed = June 25

| Dissipated = June 29

| 1-min winds = 65

| Pressure = 992

}}

A tropical wave moved off Africa's western coast on June 12, reaching the Caribbean Sea a week later and continuing across Central America. The wave spawned an area of low pressure on June 24, and this feature organized into the season's first tropical depression by 12:00 UTC on June 25 while located a few hundred miles south of Mexico. The depression initially struggled to organize, but it eventually intensified into Tropical Storm Alvin around 12:00 UTC on June 26. As a mid-level ridge steered the storm west, it began to organize in a more favorable environment. After very deep convection fired over its center, Alvin became a minimal Category 1 hurricane by 00:00 UTC on June 28 as it developed a {{convert|10|mi|km|abbr=on}} diameter eye. After attaining peak intensity, the system encountered cooler waters and increasing wind shear, causing it to weaken. Alvin became devoid of deep convection by 06:00 UTC on June 29, degenerating to a remnant low to the west-southwest of Baja California Sur at that time. The remnant low drifted west and dissipated around a day later.{{cite report|author=Andrew S. Latto|title=Tropical Cyclone Report: Hurricane Alvin|url=https://www.nhc.noaa.gov/data/tcr/EP012019_Alvin.pdf|publisher=National Hurricane Center|date=August 22, 2019|access-date=April 6, 2020}}

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{{Infobox hurricane small

| Basin = EPac

| Image = Barbara 2019-07-02 2145Z.jpg

| Track = Barbara 2019 track.png

| Formed = June 30

| Dissipated = July 5

| 1-min winds = 135

| Pressure = 930

}}

Less than a week after a tropical wave spawned Alvin, a new tropical wave moved off Africa on June 18. It remained disorganized while crossing the Atlantic, and it progressed into the eastern Pacific on June 26. The disturbance organized over the coming days and developed into Tropical Storm Barbara by 06:00 UTC on June 30, having already possessed gale-force winds at the time of formation. It moved quickly westward while struggling to intensify in an environment of wind shear and dry air. By July 1, however, more favorable environmental conditions allowed the storm to intensify. Barbara became a hurricane by 18:00 UTC on July 1 and began to rapidly intensify, ultimately reaching its peak at Category 4 intensity with winds of {{convert|155|mph|km/h|abbr=on|round=5}} at 00:00 UTC on July 3. The storm maintained a {{convert|15|mi|km|abbr=on}} diameter eye surrounded by an intense central dense overcast and numerous rainbands at that time. A turn toward the northwest brought the storm into cooler waters and drier air, with an increasingly rapid rate of weakening through July 5. Barbara degenerated to a remnant low by 00:00 UTC on July 6 after losing its deep convection. The low turned west and dissipated into a trough on July 8 to the east-southeast of Hawaii.{{cite report|author=John P. Cangialosi|title=Tropical Cyclone Report: Hurricane Barbara|url=https://www.nhc.noaa.gov/data/tcr/EP022019_Barbara.pdf|publisher=National Hurricane Center|date=August 25, 2019|access-date=April 6, 2020}}

Barbara's remnants passed {{convert|120|mi|km|abbr=on}} south of Hawai'i on July 8, producing showers over the windward regions of the island and nearby Maui.{{cite web |last1=Burke |first1=Bob |title=Area Forecast Discussion |url=https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=AFDHFO&e=201907090136 |website=National Weather Service Raw Text Product |publisher=Iowa State University |access-date=July 9, 2019 |location=Ames, Iowa |date=July 8, 2019}} The storms generated by Barbara's remnants were cited by Hawaiian Electric Industries as the likely cause of power outages affecting 45,000 electricity customers.{{cite news |title=Power Interrupted as Storm Remnants Hit Hawaii's Big Island |url=https://www.nytimes.com/aponline/2019/07/08/us/ap-us-tropical-weather.html |access-date=July 9, 2019 |work=The New York Times |agency=Associated Press |date=July 8, 2019}} {{subscription required}}

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{{Infobox hurricane small

| Basin = EPac

| Image = Cosme_2019-07-06_1820Z.jpg

| Track = Cosme 2019 track.png

| Formed = July 6

| Dissipated = July 7

| 1-min winds = 45

| Pressure = 1001

}}

Another tropical wave moved off Africa on June 23 and crossed into the East Pacific on July 2. The favorable influence of a kelvin wave and the Madden–Julian oscillation allowed the disturbance to organize, and it developed into Tropical Storm Cosme by 12:00 UTC on July 6. Anomalously strong high pressure aided in accelerating the storm's winds, and it attained a peak intensity of {{convert|50|mph|km/h|abbr=on|round=5}} upon formation. Thereafter, cooler waters, dry air, and wind shear arrested Cosme's development, and the cyclone began to weaken while turning northwest. By 00:00 UTC on July 8, Cosme degenerated to a remnant low. The low later turned west before dissipating into a trough early on July 11.{{cite report|author=David A. Zelinsky|title=Tropical Cyclone Report: Tropical Storm Cosme|url=https://www.nhc.noaa.gov/data/tcr/EP032019_Cosme.pdf|publisher=National Hurricane Center|date=August 19, 2019|access-date=April 6, 2020}}

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{{Infobox hurricane small

| Basin = EPac

| Image = 96E 2019-07-12 1740Z.jpg

| Track = 04E 2019 track.png

| Formed = July 12

| Dissipated = July 13

| 1-min winds = 30

| Pressure = 1006

}}

The tropical wave that spawned Cosme was succeeded a week later by another. It entered the East Pacific on July 8 but remained disorganized for several days while tracking west. The wave gave way to an area of low pressure on July 12, which then organized into a tropical depression only six hours later. The depression was located over very warm sea surface temperatures but under the influence of moderate wind shear, preventing organization. By July 12, persistent upper-level winds began to shear away the cyclone's convection. It degenerated to a remnant low at 00:00 UTC on July 14 while located south-southwest of Baja California Sur. The low produced intermittent bursts of convection as it moved west-northwest but ultimately dissipated early on July 15.{{cite report|author=Robbie J. Berg|title=Tropical Cyclone Report: Tropical Depression Four-E|url=https://www.nhc.noaa.gov/data/tcr/EP042019_Four-E.pdf|publisher=National Hurricane Center|date=August 6, 2019|access-date=April 6, 2020}}

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{{Infobox hurricane small

| Basin = EPac

| Image = Dalila 2019-07-23 2105Z.jpg

| Track = Dalila 2019 track.png

| Formed = July 22

| Dissipated = July 25

| 1-min winds = 40

| Pressure = 1004

}}

A tropical wave moved off Africa on July 8, showing some signs of organization until it reached the western Caribbean. It continued into the East Pacific and formed a tropical depression around 06:00 UTC on July 22. The cyclone remained disorganized for much of its duration, plagued by northerly wind shear and cooler waters. However, the formation of spiral rain bands allowed it to become Tropical Storm Dalila by 06:00 UTC on July 23; the storm attained peak winds of {{convert|45|mph|km/h|abbr=on|round=5}} six hours later. The system progressed over even cooler waters, causing Dalila to become a remnant low by 12:00 UTC on July 25. The low drifted west and dissipated the following day.{{cite report|author=Lixion A. Avila|title=Tropical Cyclone Report: Tropical Storm Dalila|url=https://www.nhc.noaa.gov/data/tcr/EP052019_Dalila.pdf|publisher=National Hurricane Center|date=August 9, 2019|access-date=April 6, 2020}}

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{{Infobox hurricane small

| Basin = EPac

| Image = Erick 2019-07-30 1900Z.jpg

| Track = Erick 2019 track.png

| Formed = July 27

| Dissipated = August 4

| 1-min winds = 115

| Pressure = 952

}}

Erick originated as a tropical wave that emerged off the coastline of Africa on July 12. It entered the eastern Pacific in late July, where convection blossomed in the presence of a very strong kelvin wave. Moderately wind shear slowed the formation process, but a tropical depression finally developed around 12:00 UTC on July 27 and organized into a tropical storm six hours later. Dry air and the elongation of its center likewise slowed organization shortly after development, but a center relocation placed the storm in a favorable environment. Erick intensified into a hurricane at 18:00 UTC on July 29 and began a period of rapid intensification, intensifying by {{convert|60|mph|km/h|abbr=on|round=5}} in just 24 hours as it crossed into the central Pacific basin. This bout of strengthening brought Erick to its peak as a Category 4 hurricane with winds of {{convert|130|mph|km/h|abbr=on|round=5}} around 18:00 UTC on July 30. The cyclone subsequently weakened while passing south of Hawaii as wind shear increased over the system. Bursts of convection allowed Erick to persist as a tropical cyclone from August 3 to 4. However, the system eventually degenerated to a remnant low by 00:00 UTC on August 5. The remnants of Erick continued moving west and reached the International Date Line on August 8.{{cite report|author1=Eric S. Blake|author2=Derek Wroe|title=Tropical Cyclone Report: Hurricane Erick|url=https://www.nhc.noaa.gov/data/tcr/EP062019_Erick.pdf|publisher=National Hurricane Center|date=April 23, 2021|access-date=April 24, 2021}}

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{{Infobox hurricane small

| Basin = EPac

| Image = Flossie_2019-07-30_2200Z.jpg

| Track = Flossie 2019 track.png

| Formed = July 28

| Dissipated = August 5

| 1-min winds = 70

| Pressure = 987

}}

A tropical wave moved off Africa on July 16 and crossed into the East Pacific eight days later. The disturbance coalesced while positioned south of Mexico, organizing into a tropical depression by 12:00 UTC on July 28. It slowly intensified while moving rapidly west-northwest, becoming Tropical Storm Flossie early on July 29 and a hurricane later the next day. After attaining peak winds of {{convert|80|mph|km/h|abbr=on|round=5}}, the storm weakened amid increasing westerly wind shear. These unfavorable upper-level winds abated on August 1, causing Flossie to fluctuate in intensity for the next day. By August 3, however, the storm embarked on a gradual weakening trend. It degenerated to a remnant low to the north of Hawaii at 00:00 UTC on August 6. The low turned north-northwest and dissipated the next morning.{{cite report|author=Richard J. Pasch|author2=David P. Roberts|title=Tropical Cyclone Report: Hurricane Flossie|url=https://www.nhc.noaa.gov/data/tcr/EP072019_Flossie.pdf|publisher=National Hurricane Center|date=January 9, 2020|access-date=April 6, 2020}}

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{{Infobox hurricane small

| Basin = EPac

| Image = Gil_2019-08-03_1845Z.jpg

| Track = Gil 2019 track.png

| Formed = August 3

| Dissipated = August 4

| 1-min winds = 35

| Pressure = 1006

}}

On July 28, an area of disturbed weather that could not reliably be traced over the Atlantic was noted over Central America. A broad area of low pressure formed on the final day of July and moved west-northwest, gaining enough organization to be declared a tropical depression around 06:00 UTC on August 3. The depression turned northwest after formation and tracked through an unfavorable wind shear environment. Despite this, it intensified into Tropical Storm Gil around 18:00 UTC on August 3, with the center located on the western edge of associated thunderstorm activity. Gil failed to intensify beyond minimal tropical storm intensity, losing its bursting convection as the storm encountered dry air. Gil degenerated to a remnant low around 00:00 UTC on August 5 well to the west-southwest of Baja California Sur. It dissipated the next morning.{{cite report|author=John L. Beven II|title=Tropical Cyclone Report: Tropical Storm Gil|url=https://www.nhc.noaa.gov/data/tcr/EP082019_Gil.pdf|publisher=National Hurricane Center|date=January 10, 2020|access-date=April 6, 2020}}

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{{Infobox hurricane small

| Basin = EPac

| Image = Henriette 2019-08-12 2120Z.jpg

| Track = Henriette 2019 track.png

| Formed = August 12

| Dissipated = August 13

| 1-min winds = 40

| Pressure = 1003

}}

A vigorous tropical wave crossed the coastline of Africa on July 28 and moved west across the Atlantic. The wave nearly organized into a tropical depression over the eastern Caribbean Sea but soon lost organization. After it crossed into the East Pacific on August 9, subsequent interaction with a monsoon trough led to the formation of an area of low pressure, which continued on to become a tropical depression around 00:00 UTC on August 12 to the south of Baja California Sur. Increasing thunderstorm activity led to the designation of Tropical Storm Henriette six hours later. Henriette attained peak winds of {{convert|45|mph|km/h|abbr=on|round=5}} before the combination of cooler waters and dry air caused weakening, degenerating into a remnant low around 12:00 UTC on August 13 and dissipating two days later.{{cite report|author=Stacy R. Stewart|title=Tropical Cyclone Report: Tropical Storm Henriette|url=https://www.nhc.noaa.gov/data/tcr/EP092019_Henriette.pdf|publisher=National Hurricane Center|date=October 8, 2019|access-date=April 6, 2020}}

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{{Infobox hurricane small

| Basin = EPac

| Image = Ivo_2019-08-22_2120Z.jpg

| Formed = August 21

| Dissipated = August 25

| 1-min winds = 60

| Pressure = 990

| Track = Ivo 2019 track.png

}}

{{Main|Tropical Storm Ivo (2019)}}

Two tropical waves crossed the Atlantic in quick succession. The leading tropical wave spawned an area of low pressure over the eastern Pacific on August 6, while the second wave enhanced the low's convection. The disturbance gradually developed into a tropical depression by 06:00 UTC on August 21; it intensified into Tropical Storm Ivo six hours later. Favorable atmospheric conditions allowed Ivo to intensify over subsequent days, and it reached a peak intensity of {{convert|70|mph|km/h|abbr=on|round=5}} early on August 22 as a mid-level eye became evident on microwave imagery. Although increasing wind shear caused it to slowly weaken, Ivo passed close to Clarion Island early on August 23, producing sustained winds of {{convert|61|mph|km/h|abbr=on}} and gusts to {{convert|76|mph|km/h|abbr=on}}. The storm continued to weaken as it entered cooler waters. It degenerated to a remnant low around 06:00 UTC on August 25. The low meandered for a while before dissipating early on August 27 to the west of Baja California Sur.{{cite report|author=Daniel P. Brown|title=Tropical Cyclone Report: Tropical Storm Ivo|url=https://www.nhc.noaa.gov/data/tcr/EP102019_Ivo.pdf|publisher=National Hurricane Center|date=November 7, 2019|access-date=April 6, 2020}}

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{{Infobox hurricane small

| Basin = EPac

| Image = Juliette 2019-09-03 1800Z.jpg

| Track = Juliette 2019 track.png

| Formed = September 1

| Dissipated = September 7

| 1-min winds = 110

| Pressure = 953

}}

On August 18, a tropical wave moved off Africa. It inconspicuously crossed the Atlantic and emerged into the East Pacific on August 27. A broad area of low pressure formed in association with increased convective activity, leading to the formation of Tropical Storm Juliette by 00:00 UTC on September 1. The newly formed storm quickly organized amid favorable conditions, becoming a hurricane by 12:00 UTC on September 2 and entering a period of rapid intensification. Within a day, Juliette attained its peak at Category 3 intensity with winds of {{convert|125|mph|km/h|abbr=on|round=5}}. Beyond that time, the cyclone's eyewall collapsed and caused a persistent weakening trend. Juliette degenerated to a remnant low 06:00 UTC on September 7 to the west of Baja California Sur. The low drifted west and dissipated early on September 9.{{cite report|author=Andrew S. Latto|title=Tropical Cyclone Report: Hurricane Juliette|url=https://www.nhc.noaa.gov/data/tcr/EP112019_Juliette.pdf|publisher=National Hurricane Center|date=December 10, 2019|access-date=April 6, 2020}}

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{{Infobox hurricane small

| Basin = EPac

| Image = Akoni 2019-09-05 2306Z.jpg

| Track = Akoni 2019 track.png

| Formed = September 4

| Dissipated = September 6

| 1-min winds = 35

| Pressure = 1004

}}

Early on September 4, the NHC began to track a quickly-developing area of low pressure about {{convert|1,100|mi|km|abbr=on}} east-southeast of the Big Island of Hawaii.{{Cite report|url=https://www.nhc.noaa.gov/archive/xgtwo/gtwo_archive.php?basin=epac&fdays=5¤t_issuance=201909041704|author1=Eric Blake|author2=Daniel Brown|title=Tropical Weather Outlook|date=September 4, 2019|publisher=National Hurricane Center|access-date=November 20, 2019}} Just a few hours later, following a sudden increase in convection, the system organized into Tropical Depression Twelve-E and moved into the Central Pacific basin.{{Cite report|url=https://www.nhc.noaa.gov/archive/2019/ep12/ep122019.discus.001.shtml?|title=Tropical Depression Twelve-E Discussion Number 1|author=David Zelinsky|website=www.nhc.noaa.gov|publisher=National Hurricane Center|location=Miami, Florida|date=September 4, 2019|access-date=September 4, 2019}} It slowly intensified and eventually reached tropical storm status, whereupon it was named Akoni.{{Cite report|url=https://www.nhc.noaa.gov/archive/2019/ep12/ep122019.discus.007.shtml?|title=Tropical Storm Akoni Discussion Number 7|author=Ballard|website=www.nhc.noaa.gov|publisher=National Hurricane Center|location=Miami, Florida|date=September 5, 2019|access-date=November 20, 2019}} The system struggled to organize because of high wind shear and quickly degenerated into a remnant low on September 6.{{Cite report|url=https://www.nhc.noaa.gov/archive/2019/ep12/ep122019.public.010.shtml?|title=Post-Tropical Cyclone Akoni Discussion Number 10|author=Tom Birchard|website=www.nhc.noaa.gov|publisher=National Hurricane Center|location=Miami, Florida|date=September 6, 2019|access-date=September 7, 2019}}

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{{Infobox hurricane small

| Basin = EPac

| Image = Kiko 2019-09-15 2130Z.jpg

| Track = Kiko 2019 track.png

| Formed = September 12

| Dissipated = September 24

| 1-min winds = 115

| Pressure = 950

}}

The final major hurricane of the season originated as a tropical wave that moved off Africa on August 27. It crossed into the East Pacific on September 7, where it spawned a tropical depression by 06:00 UTC on September 12. The depression intensified into Tropical Storm Kiko twelve hours later but struggled to organize further as it underwent multiple center reformations. Beginning at 00:00 UTC on September 14, however, Kiko entered a period of rapid intensification that brought the storm to its peak as a Category 4 hurricane with winds of {{convert|130|mph|km/h|abbr=on|round=5}} a little over a day later. It displayed a prominent spiral band wrapping into a symmetric central dense overcast and large eye at that time. After reaching peak intensity, Kiko fluctuated in intensity due to varying atmospheric conditions while tracing a sinusoidal path across the Pacific. The storm finally lost its deep convection on September 24 and degenerated to a remnant low by 18:00 UTC as a result. The low turned west and dissipated on September 27.{{cite report|author=David A. Zelinsky|title=Tropical Cyclone Report: Hurricane Kiko|url=https://www.nhc.noaa.gov/data/tcr/EP132019_Kiko.pdf|publisher=National Hurricane Center|date=January 10, 2020|access-date=April 6, 2020}}

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{{Infobox hurricane small

| Basin = EPac

| Image = Lorena_2019-09-20_2010Z.jpg

| Track = Lorena 2019 track.png

| Formed = September 17

| Dissipated = September 22

| 1-min winds = 75

| Pressure = 985

}}

{{main|Hurricane Lorena (2019)}}

A large tropical wave departed Africa on September 4 and entered the East Pacific by September 16. The disturbance quickly organized upon emerging over water, and it became Tropical Storm Lorena at 06:00 UTC on September 17 while moving northwest. Lorena became a hurricane on September 19 while passing very close to the coastline of Jalisco and made landfall near Chatmela-Cuixmala with winds of {{convert|75|mph|km/h|abbr=on|round=5}} six hours later. Lorena weakened as it emerged back offshore, but it became a hurricane a second time and reached peak winds of {{convert|85|mph|km/h|abbr=on|round=5}} late on September 20 as an eye appeared on satellite. The storm struck Baja California Sur near La Ventana at a slightly reduced strength at 03:00 UTC on September 21. Lorena weakened thereafter as it curved north, degenerating to a remnant low as it reached the coastline of mainland Mexico around 12:00 UTC on September 22 and dissipating six hours later.{{cite report|author=Lixion A. Avila|title=Tropical Cyclone Report: Hurricane Lorena|url=https://www.nhc.noaa.gov/data/tcr/EP152019_Lorena.pdf|publisher=National Hurricane Center|date=October 30, 2019|access-date=April 6, 2020}}

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{{Infobox hurricane small

| Basin = EPac

| Image = Mario 2019-09-18 2042Z.jpg

| Track = Mario 2019 track.png

| Formed = September 17

| Dissipated = September 22

| 1-min winds = 60

| Pressure = 991

}}

A tropical wave, the same that spawned Tropical Storm Gabrielle in the Atlantic, left Africa on August 30 and progressed into the eastern Pacific on September 13. The wave led to the formation of a tropical depression around 12:00 UTC on September 17 and Tropical Storm Mario twelve hours later. Although Mario was located in close proximity to strengthening Tropical Storm Lorena and experienced shear from that storm's outflow, it still intensified to a peak of {{convert|70|mph|km/h|abbr=on|round=5}} late on September 18 while weaving its way north across the Pacific. Shortly thereafter, upper-level winds increased further and caused a weakening trend that caused the system to degenerate to a remnant low by 00:00 UTC on September 23. The low moved parallel to Baja California Sur before turning east and dissipating just west of the state late on September 24.{{cite report|author=Robbie J. Berg|title=Tropical Cyclone Report: Tropical Storm Mario|url=https://www.nhc.noaa.gov/data/tcr/EP142019_Mario.pdf|publisher=National Hurricane Center|date=November 7, 2019|access-date=April 6, 2020}}

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{{Infobox hurricane small

| Basin = EPac

| Image = Narda 2019-09-30 1740Z.jpg

| Track = Narda 2019 track.png

| Formed = September 29

| Dissipated = October 1

| 1-min winds = 45

| Pressure = 997

}}

{{main|Tropical Storm Narda (2019)}}

The deadliest tropical cyclone of the season originated as a tropical wave that left Africa on September 15. The wave entered the eastern Pacific on September 26, where it became embedded within the Intertropical Convergence Zone and organized. Tropical Storm Narda developed around 00:00 UTC on September 29 as a result. The nascent cyclone moved quickly northwest and made landfall northeast of Lázaro Cárdenas, Michoacán, at 14:00 UTC on September 29 harboring winds of {{convert|45|mph|km/h|abbr=on|round=5}}. Mountainous terrain slightly weakened Narda as it crossed over land, but its large circulation and outside orographic effects aided in the maintenance of tropical storm-force winds. The storm immediately re-intensified once over water and attained peak winds of {{convert|50|mph|km/h|abbr=on|round=5}} while developing a mid-level eye feature. Narda made a second landfall near Las Glorias around 00:00 UTC on October 1 at peak strength. It rapidly weakened after moving inland and dissipated six hours later over southern Sonora.{{cite report|author=Eric S. Blake|title=Tropical Cyclone Report: Tropical Storm Narda|url=https://www.nhc.noaa.gov/data/tcr/EP162019_Narda.pdf|publisher=National Hurricane Center|date=November 15, 2019|access-date=April 7, 2020}}

Narda brought heavy rains and flooding in southwestern Mexico. Two people were killed in Oaxaca, one in Colima, and one in Guerrero.{{cite news|url=https://noticieros.televisa.com/ultimas-noticias/narda-tormenta-tropical-muertos-oaxaca-colima/|title='Narda' deja tres muertos tras su paso por Oaxaca y Colima|language=es|publisher=Noticieros Televisa|date=October 1, 2019|access-date=October 1, 2019}}{{cite news|author=Sergio Ocampo Arista|url=https://www.jornada.com.mx/ultimas/estados/2019/10/01/tormenta-tropical-2018narda2019-deja-un-muerto-en-malinaltepec-guerrero-6286.html|title=Tormenta tropical 'Narda' deja un muerto en Malinaltepec, Guerrero|language=es|work=La Jornada|date=October 1, 2019|access-date=October 1, 2019|archive-url=https://web.archive.org/web/20191002035037/https://www.jornada.com.mx/ultimas/estados/2019/10/01/tormenta-tropical-2018narda2019-deja-un-muerto-en-malinaltepec-guerrero-6286.html|archive-date=2019-10-02|url-status=dead}}

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{{Infobox hurricane small

| Basin = EPac

| Formed = October 12

| Dissipated = October 14

| Image = Ema 2019-10-12 2125Z.jpg

| Track = Ema 2019 track.png

| 1-min winds = 45

| Pressure = 1003

}}

An area of low pressure developed a few hundred miles to the west of Hawaii on October 12. The system was assessed as having a low chance of development by the Central Pacific Hurricane Center; however, the system quickly organized later the same day. Gale-force winds soon developed, and consequently the CPHC upgraded the system to a tropical storm at 15:00 UTC, naming it Ema.{{Cite report|url=https://www.nhc.noaa.gov/archive/2019/cp01/cp012019.discus.001.shtml?|title=Tropical Storm Ema Discussion Number 1|author=Jon Jelsema|publisher=National Hurricane Center|location=Miami, Florida|date=October 12, 2019|access-date=November 20, 2019}} Ema's existence was short-lived, however, as the storm weakened due to strong wind shear and degenerated to a remnant low on October 14.{{cite report|author=Jon Jelsema|url=https://www.nhc.noaa.gov/archive/2019/cp01/cp012019.discus.008.shtml?|title=Post-Tropical Cyclone Ema Discussion Number 8|date=October 14, 2019|publisher=Central Pacific Hurricane Center|access-date=October 14, 2019}}

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{{Infobox hurricane small

| Basin = EPac

| Image = Octave 2019-10-17 2130Z.jpg

| Track = Octave 2019 track.png

| Formed = October 17

| Dissipated = October 19

| 1-min winds = 40

| Pressure = 1006

}}

An area of low pressure materialized within the monsoon trough across the eastern Pacific on October 15. The low drifted west-southwest and organized into a tropical depression around 12:00 UTC on October 17 before further intensifying into Tropical Storm Octave twelve hours later. The small storm attained peak winds of {{convert|45|mph|km/h|abbr=on|round=5}} within a small central dense overcast before it drifted northward into an environment of dry air that prompted weakening. Octave degenerated to a remnant low around 18:00 UTC on October 19 as it curved east-northeast and later south-southwest. The remnant low dissipated two days later in the vicinity of where it first developed.{{cite report|author=John L. Beven II|title=Tropical Cyclone Report: Tropical Storm Octave|url=https://www.nhc.noaa.gov/data/tcr/EP182019_Octave.pdf|publisher=National Hurricane Center|date=January 24, 2020|access-date=April 7, 2020}}

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{{Infobox hurricane small

| Basin = EPac

| Image = Priscilla 2019-10-20 2025Z.jpg

| Track = Priscilla 2019 track.png

| Formed = October 20

| Dissipated = October 21

| 1-min winds = 40

| Pressure = 1003

}}

Another tropical wave moved off Africa on October 3 and fractured over the Caribbean Sea, with the northern portion spawning Tropical Storm Nestor in the Atlantic. The southern portion continued into the eastern Pacific, leading to the formation of a tropical depression around 00:00 UTC on October 20. It intensified into Tropical Storm Priscilla six hours later while turning north. Having spent little time over water, and affected by moderate easterly wind shear, Priscilla quickly moved into the coastline near Cuyutlán, Colima, at 19:30 UTC on October 20 as a minimal tropical storm. The cyclone weakened quickly once inland and dissipated by 06:00 UTC on October 21 over the rugged terrain of southwestern Mexico.{{cite report|author=Stacy R. Stewart|title=Tropical Cyclone Report: Tropical Storm Priscilla|url=https://www.nhc.noaa.gov/data/tcr/EP192019_Priscilla.pdf|publisher=National Hurricane Center|date=December 9, 2019|access-date=April 7, 2020}}

Priscilla and its precursor disturbance over Mexico caused heavy flooding and mudslides in and around areas Manzanillo.{{cite report|url=https://www.nhc.noaa.gov/archive/2019/ep19/ep192019.public.003.shtml?|title=Tropical Depression Priscilla Advisory Number 3|author=Stacy Stewart|publisher=National Hurricane Center|date=October 20, 2019|access-date=October 21, 2019|location=Miami, Florida}}

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{{Infobox hurricane small

| Basin = EPac

| Image = Raymond 2019-11-15 2010Z.jpg

| Track = Raymond 2019 track.png

| Formed = November 14

| Dissipated = November 17

| 1-min winds = 45

| Pressure = 1001

}}

Yet another tropical wave left Africa on October 27. This feature entered the East Pacific on November 6, where it was enhanced by an ongoing Gulf of Tehuantepec gap wind event and an eastward-moving kelvin wave. The wave spawned a tropical depression by 12:00 UTC on November 14. It moved north and north-northwest while remaining largely disorganized in the presence of moderate northwesterly wind shear. By 06:00 UTC on November 15, the depression intensified into Tropical Storm Raymond. It attained peak winds of {{convert|50|mph|km/h|abbr=on|round=5}} later that day before encountering increased wind shear from the southwest. Raymond slowly decayed and dissipated after 00:00 UTC on November 18 to the south of Baja California Sur.{{cite report|author=Daniel P. Brown|title=Tropical Cyclone Report: Tropical Storm Raymond|url=https://www.nhc.noaa.gov/data/tcr/EP202019_Raymond.pdf|publisher=National Hurricane Center|date=January 13, 2020|access-date=April 7, 2020}}

The remnants of the storm brought heavy rain to Southern California and Arizona, leaving over 13 million people under flash flood watch and alleviating unusually dry conditions, bringing the first significant rainfall to Southern California since May.{{Cite web|url=https://www.newsweek.com/weather-warning-flash-flood-watch-southern-california-arizona-nevada-utah-1473023|title=A Flash Flood Watch has been issued across parts of Southern California, Arizona, Nevada and Utah|last=EST|first=Soo Kim On 11/20/19 at 12:25 PM|date=2019-11-20|website=Newsweek|access-date=2019-11-21}} The system also brought heavy snow to higher elevation areas.{{Cite web|url=https://www.freightwaves.com/news/double-whammy-of-heavy-snow-flooding-rain-in-western-us|title=Double whammy of heavy snow, flooding rain in western U.S. (forecast video)|date=2019-11-20|website=FreightWaves|access-date=2019-11-21}}

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{{Infobox hurricane small

| Basin = EPac

| Image = 21E 2019-11-17 1745Z.jpg

| Track = 21E 2019 track.png

| Formed = November 16

| Dissipated = November 18

| 1-min winds = 30

| Pressure = 1006

}}

On November 2, a late-season tropical wave moved off the west coast of Africa. The wave entered the eastern Pacific on November 12 and spawned an area of low pressure the next day. A strong gap wind event kept the system disorganized as it passed south of the Gulf of Tehuantepec. Afterwards, deep convection began to develop closer to the center of the low, and the low's circulation became more apparent. This resulted in the formation of the season's final tropical depression around 00:00 UTC on November 16. Multiple center reformations and intrusions of dry air arrested development despite another favorable environment. This resulted in weakening, and the depression dissipated after 12:00 UTC on November 18.{{cite report|author=Andrew S. Latto|title=Tropical Cyclone Report: Tropical Depression Twenty-One-E|url=https://www.nhc.noaa.gov/data/tcr/EP212019_Twenty_One-E.pdf|publisher=National Hurricane Center|date=January 7, 2020|access-date=January 28, 2020}}

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{{main|Potential Tropical Cyclone Seventeen-E}}

File:17E 2019-10-16 1745Z.jpg

A tropical wave entered the eastern Pacific by October 14, where it spawned a broad area of low pressure. The disturbance became better defined over the coming days, prompting the NHC to initiate advisories on Potential Tropical Cyclone Seventeen-E at 03:00 UTC on October 16 and facilitate tropical storm watches along the coastline of Mexico. The disturbance soon became poorly organized, as its convection dwindled and its center became less defined. The system moved inland between Bahias de Huatulco and Salina Cruz in the Mexican state of Oaxaca without ever having formed into a tropical cyclone.{{cite report|author=Richard J. Pasch|title=Potential Tropical Cyclone Seventeen-E|url=https://www.nhc.noaa.gov/data/tcr/EP172019_PTC_Seventeen-E.pdf|publisher=National Hurricane Center|date=February 28, 2020|access-date=April 7, 2020}} Gusty winds and heavy rain affected parts of El Salvador, causing significant damage. Four people died in storm-related incidents: three from flooding and one from a fallen tree.{{Citation needed|date=November 2020}} Eighty families required evacuation in Cangrejera.{{cite news|language=es|website=elsalvador.com|date=October 15, 2019|access-date=October 20, 2019|title=Inundaciones, evacuados y calles bloqueadas tras fuertes lluvias en el territorio salvadoreño|url=https://www.elsalvador.com/noticias/nacional/casas-soterradas-e-inundaciones-tras-fuertes-lluvias-de-las-ultimas-horas/649651/2019/}}

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{{Tropical cyclone naming}}

The following list of names was used for named storms that formed in the North Pacific Ocean east of 140°W during 2019.{{cite news|last=Sangalang|first=Jennifer|title=From Alvin to Zelda: 2019 hurricane season names for Eastern North Pacific|date=May 21, 2019|url=https://www.floridatoday.com/story/weather/2019/05/21/2019-hurricane-season-names-pacific/3697894002/|publisher=Florida Today|location=Viera, Florida|access-date=March 7, 2024}} This was the same list used in the 2013 season, with the exception of the name Mario, which replaced Manuel.{{cite web|archive-url=https://web.archive.org/web/20130430134031/http://www.nhc.noaa.gov/aboutnames.shtml|url=http://www.nhc.noaa.gov/aboutnames.shtml|title=Tropical Cyclone Names|publisher=National Oceanic and Atmospheric Administration|work=National Hurricane Center|date=April 11, 2013|archive-date=April 30, 2013|access-date=March 7, 2024|url-status=deviated}}{{cite news|url=https://www.noaa.gov/wmo-retires-ingrid-and-manuel-atlantic-and-eastern-north-pacific-basins|title=WMO retires Ingrid and Manuel for Atlantic and eastern North Pacific basins|date=April 10, 2014|publisher=National Oceanic and Atmospheric Administration|access-date=March 7, 2024|location=Silver Spring, Maryland}} The name Mario was used for the first time this year. No names were retired from this list following the season, and it was used again for the 2025 season.

For storms that form in the North Pacific from 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. Two named storms, listed below, formed within the area in 2019.{{cite report|title=2019 Hurricane Season Summary for the Central Pacific Basin|date=November 28, 2019|url=https://www.weather.gov/hfo/2019_CentralPacificHurricaneSeasonSummary|publisher=NOAA|access-date=January 27, 2024}} Their names were from List{{nbh}}1, as the final name on List{{nbh}}4 had been used the previous season for Hurricane Walaka. List{{nbh}}1 was first used 37 years earlier, during the 1982 season.{{cite web|website=cyclingweather.org|title=Reaching the End of the List|date=September 27, 2018|url=http://cyclingweather.org/2018/09/reaching-the-end-of-the-list/|access-date=March 7, 2024}}{{cite news|last=Mattos|first=Shelby|title=Here are the possible hurricane names for the 2023 season in the Central North Pacific|date=June 13, 2023|url=https://www.kitv.com/weather/hurricane-center/here-are-the-possible-hurricane-names-for-the-2023-season-in-the-central-north-pacific/article_eef33bae-0a2f-11ee-b076-633172bb92f6.html|publisher=KITV|location=Honolulu, Hawaii|access-date=March 7, 2024}} Named storms in the table above that crossed into the area during the year are noted (*).

This is a table of all of the tropical cyclones that formed in the 2019 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 2019 USD.

{{Saffir–Simpson small|align=center}}

{{center|{{TC stats table start3|year=2019|basin=Pacific hurricane}}

{{TC stats cyclone3|cat=cat1|name=Alvin|dates=June 25–29|max-winds=75 (120)|min-press=992|areas=Western Mexico|damage=None|deaths=None}}

{{TC stats cyclone3|cat=cat4|name=Barbara|dates=June 30 – July 5|max-winds=155 (250)|min-press=930|areas=Clipperton Island, Hawaii, Johnston Atoll|damage=Minimal|deaths=None}}

{{TC stats cyclone3|cat=storm|name=Cosme|dates=July 6–7|max-winds=50 (85)|min-press=1001|areas=None|damage=None|deaths=None}}

{{TC stats cyclone3|cat=depression|name=Four-E|dates=July 12–13|max-winds=35 (55)|min-press=1006|areas=None|damage=None|deaths=None}}

{{TC stats cyclone3|cat=storm|name=Dalila|dates=July 22–25|max-winds=45 (75)|min-press=1004|areas=None|damage=None|deaths=None}}

{{TC stats cyclone3|cat=cat4|name=Erick|dates=July 27 – August 4|max-winds=130 (215)|min-press=952|areas=Hawaii|damage=None|deaths=None}}

{{TC stats cyclone3|cat=cat1|name=Flossie|dates=July 28 – August 5|max-winds=80 (130)|min-press=987|areas=Hawaii|damage=None|deaths=None}}

{{TC stats cyclone3|cat=storm|name=Gil|dates=August 3–4|max-winds=40 (65)|min-press=1006|areas=None|damage=None|deaths=None}}

{{TC stats cyclone3|cat=storm|name=Henriette|dates=August 12–13|max-winds=45 (75)|min-press=1003|areas=Lesser Antilles, Central America|damage=None|deaths=None}}

{{TC stats cyclone3|cat=storm|name=Ivo|dates=August 21–25|max-winds=70 (110)|min-press=990|areas=Clarion Island, Mexico|damage=Unknown|deaths=5}}

{{TC stats cyclone3|cat=cat3|name=Juliette|dates=September 1–7|max-winds=125 (205)|min-press=953|areas=Southwest Mexico, Revillagigedo Islands, Baja California Peninsula|damage=None|deaths=None}}

{{TC stats cyclone3|cat=storm|name=Akoni|dates=September 4–6|max-winds=40 (65)|min-press=1004|areas=None|damage=None|deaths=None}}

{{TC stats cyclone3|cat=cat4|name=Kiko|dates=September 12–24|max-winds=130 (215)|min-press=950|areas=None|damage=None|deaths=None}}

{{TC stats cyclone3|cat=cat1|name=Lorena|dates=September 17–22|max-winds=85 (140)|min-press=985|areas=Sonora, Sinaloa, Jalisco, Colima, Michoacán, Baja California Peninsula|damage=$50 million|deaths=1}}{{cite news|newspaper=Times of Israel|date=September 21, 2019|access-date=September 26, 2019|title=Israeli dies in Mexico while saving son from drowning|url=https://www.timesofisrael.com/israeli-man-dies-in-mexico-while-saving-son-from-drowning/}}{{Cite web|date=Jan 22, 2020|title=Weather, Climate & Catastrophe Insight - 2019 Annual Report|url=http://thoughtleadership.aon.com/Documents/20200122-if-natcat2020.pdf|url-status=live|access-date=March 28, 2021|website=AON Impact Forecasting|archive-url=https://web.archive.org/web/20200208100217/http://thoughtleadership.aon.com/Documents/20200122-if-natcat2020.pdf?utm_source=ceros&utm_medium=storypage&utm_campaign=natcat20 |archive-date=2020-02-08 }}

{{TC stats cyclone3|cat=storm|name=Mario|dates=September 17–22|max-winds=70 (110)|min-press=991|areas=Revillagigedo Islands, Baja California Peninsula|damage=None|deaths=None}}

{{TC stats cyclone3|cat=storm|name=Narda|dates=September 29 – October 1|max-winds=50 (85)|min-press=997|areas=Western Mexico, Baja California Peninsula|damage=$162 million|deaths=6}}{{cite news|author=Sergio Ocampo Arista|url=https://www.jornada.com.mx/ultimas/estados/2019/10/01/tormenta-tropical-2018narda2019-deja-un-muerto-en-malinaltepec-guerrero-6286.html|title=Tormenta tropical 'Narda' deja un muerto en Malinaltepec, Guerrero|language=es|work=La Jornada|date=October 1, 2019|access-date=October 1, 2019|archive-date=October 2, 2019|archive-url=https://web.archive.org/web/20191002035037/https://www.jornada.com.mx/ultimas/estados/2019/10/01/tormenta-tropical-2018narda2019-deja-un-muerto-en-malinaltepec-guerrero-6286.html|url-status=dead}}{{cite news|author=Sergio Ocampo Arista|url=https://www.lavanguardia.com/internacional/20191002/47773657815/mexico-fallecen-dos-personas-heridos-tormenta-tropical-narda-video-seo-ext.html|title=Dos personas han fallecido en México debido a la fuerte tormenta tropical|language=es|publisher=La Vanguardia|date=October 3, 2019|access-date=October 3, 2019}}

{{TC stats cyclone3|cat=storm|name=Ema|dates=October 12–14|max-winds=50 (85)|min-press=1003|areas=Hawaiian Islands, Papahānaumokuākea Marine National Monument|damage=None|deaths=None}}

{{TC stats cyclone3|cat=storm|name=Octave|dates=October 17–19|max-winds=45 (75)|min-press=1006|areas=None|damage=None|deaths=None}}

{{TC stats cyclone3|cat=storm|name=Priscilla|dates=October 20–21|max-winds=45 (75)|min-press=1003|areas=Western Mexico|damage=Minimal|deaths=None}}

{{TC stats cyclone3|cat=storm|name=Raymond|dates=November 14–17|max-winds=50 (85)|min-press=1001|areas=Revillagigedo Islands, Baja California Peninsula|damage=Minimal|deaths=None}}

{{TC stats cyclone3|cat=depression|name=Twenty-One-E|dates=November 16–18|max-winds=35 (55)|min-press=1006|areas=Southwest Mexico|damage=None|deaths=None}}

{{TC stats table end3|num-cyclones=21|dates=June 25 – November 18|max-winds=155 (250)|min-press=930|tot-areas=|tot-damage=$212 million|tot-deaths=12}}

}}

{{Portal|Tropical cyclones}}

• Weather of 2019
• List of Pacific hurricanes
• Pacific hurricane season
• Tropical cyclones in 2019
• 2019 Atlantic hurricane season
• 2019 Pacific typhoon season
• 2019 North Indian Ocean cyclone season
• South-West Indian Ocean cyclone seasons: 2018–19, 2019–20
• Australian region cyclone seasons: 2018–19, 2019–20
• South Pacific cyclone seasons: 2018–19, 2019–20

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{{reflist|group="nb"}}

{{reflist|2}}

{{commons category}}

• [http://www.nhc.noaa.gov National Hurricane Center Website]
• [http://www.nhc.noaa.gov/text/MIATWOEP.shtml National Hurricane Center's Eastern Pacific Tropical Weather Outlook]
• [http://smn.cna.gob.mx/ Servicio Meteorológico Nacional Website] {{in lang|es}}
• [http://www.metoc.navy.mil/jtwc/ Joint Typhoon Warning Center] {{Webarchive|url=https://web.archive.org/web/20180202190141/http://www.metoc.navy.mil/jtwc/ |date=2018-02-02 }}
• [https://www.nhc.noaa.gov/data/tcr/index.php?season=2019&basin=epac NHC 2019 Pacific hurricane season archive]

{{2019 Pacific hurricane season buttons}}

{{TC Decades|Year=2010|basin=Pacific|type=hurricane}}

{{Tropical cyclone season|2019}}

Category:Pacific hurricane seasons

2019 EPac