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The NHC monitored a tropical wave, which eventually developed into a tropical storm on September 23 and was given the name Pilar. The storm was weak and eventually weakened into a low during September 25. Pilar caused minor damage in western [[Mexico]] near the city of [[Mazatlán]].
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Revision as of 01:05, 26 September 2017

2017 Pacific hurricane season
Season summary map
Seasonal boundaries
First system formedMay 9, 2017
(record earliest in East Pacific)
Last system dissipatedSeason ongoing
Strongest storm
NameFernanda
 • Maximum winds145 mph (230 km/h)
(1-minute sustained)
 • Lowest pressure947 mbar (hPa; 27.97 inHg)
Seasonal statistics
Total depressions18
Total storms16
Hurricanes9
Major hurricanes
(Cat. 3+)		4
Total fatalities16 total
Total damage$3.9 million (2017 USD)
Related articles
Pacific hurricane seasons
2015, 2016, 2017, 2018, 2019

The 2017 Pacific hurricane season is an ongoing event in the annual cycle of tropical cyclone formation, in which tropical cyclones form in the northeastern Pacific Ocean. The season officially started on May 15 in the eastern Pacific, and on June 1 in the central Pacific; they will both end on November 30.[1] These dates conventionally delimit the period of each year when most tropical cyclones form in the basin. However, the formation of tropical cyclones is possible at any time of the year. This was demonstrated when the first storm, Tropical Storm Adrian, was named on May 10 and became the earliest-known tropical storm in the East Pacific since the advent of satellite imagery.

Beginning this year, the National Hurricane Center has the option to issue advisories, and thus allow watches and warnings to be issued, on disturbances that are not yet tropical cyclones but have a high chance to become one, and are expected to bring tropical storm or hurricane conditions to landmasses within 48 hours. Such systems are termed "potential tropical cyclones". Advisories on these storms contain the same content, including track forecasts and cyclone watches and warnings, as advisories on active tropical cyclones.[2] This was first demonstrated on August 29 with the designation of Potential Tropical Cyclone Fourteen-E—which later developed into Tropical Storm Lidia—south-southeast of the Baja California Peninsula.

Seasonal forecasts

Record Named
storms 		Hurricanes Major
hurricanes 		Ref
Average (1981-2010): 15.4 7.6 3.2 [3]
Record high activity: 1992: 27 2015: 16 2015: 11 [4]
Record low activity: 2010: 8 2010: 3 2003: 0 [4]
Date Source Named
storms 		Hurricanes Major
hurricanes 		Ref
May 25, 2017 NOAA 14–20 6–11 3–7 [5]
May 29, 2017 SMN 16 10 6 [6]
Area Named
storms		 Hurricanes Major
hurricanes		 Ref
Actual activity: EPAC 16 9 4
Actual activity: CPAC 0 0 0
Actual activity: 16 9 4

On May 25, 2017, the National Oceanic and Atmospheric Administration released its annual forecast, predicting a 80% chance of a near- to above-average season in both the Eastern and Central Pacific basins, with a total of 14–20 named storms, 6–11 hurricanes, and 3–7 major hurricanes.[nb 1][5] During May 28, the Servicio Meteorológico Nacional (SMN) issued its first forecast for the season, predicting a total of 16 named storms, 10 hurricanes and 6 major hurricanes to develop.[6]

Seasonal summary

Main article: Timeline of the 2017 Pacific hurricane season
Tropical Storm Lidia (2017)Saffir–Simpson scale

The Accumulated Cyclone Energy (ACE) for the 2017 Pacific hurricane season, as of 09:00 UTC on September 23, is 96.4025 units (95.47 units from the East Pacific and 0.9325 units from the Central Pacific).[nb 2]

Although the East Pacific hurricane season does not officially begin until May 15, activity began several days prior with the formation of a tropical depression on May 9. This marked the earliest formation of a tropical cyclone in the basin, surpassing 1990's Hurricane Alma.[7] It intensified into Tropical Storm Adrian a few hours later, marking the earliest formation of a named storm on record.[8] Near normal activity occurred in June, with Tropical Storm Calvin formed on June 11, and Hurricane Dora on June 25[9] the following month was well above average; July featured the fifth-highest ACE value on record and boosted the seasonal value to almost double that of the long-term average.[10] This total was attributed to long lived hurricanes Eugene, Fernanda, Hilary and Irwin. August saw less activity, but did feature Category 4 Hurricane Kenneth and Tropical Storm Lidia.

Systems

Tropical Storm Adrian

Tropical storm (SSHWS)
 
DurationMay 9 – May 11
Peak intensity45 mph (75 km/h) (1-min);
1004 mbar (hPa)
See also: List of off-season Pacific hurricanes

On May 5, the National Hurricane Center (NHC) indicated that an area of low pressure was forecast to form south of Mexico over subsequent days, with the possibility of tropical cyclone development thereafter.[11] A broad cyclonic circulation began to develop as expected late on May 7,[12] gradually organizing into the season's first tropical depression by 21:00 UTC on May 9.[13] Upon formation, at which point it was located about 545 mi (875 km) south-southeast of Salina Cruz, Mexico, the depression became the earliest-forming East Pacific tropical cyclone (east of 140°W) on record. The previous record was held by 1990's Hurricane Alma, which formed on May 12.[7] The depression intensified into Tropical Storm Adrian six hours later, the earliest-known formation of a named storm in eastern Pacific proper since the advent of the satellite era.[14] Initially, forecasts expected the small storm to intensify into a powerful hurricane. Shortly after reaching peak intensity early on May 10, an unexpected increase in mid-level wind shear caused Adrian to quickly weaken back to a tropical depression by 03:00 UTC on May 11.[15] Early on the next day, Adrian degenerated into a remnant low.[16]

Tropical Storm Beatriz

Tropical storm (SSHWS)
 
DurationMay 31 – June 2
Peak intensity45 mph (75 km/h) (1-min);
1001 mbar (hPa)

A tropical wave emerged off the western coast of Africa on May 18 and entered the East Pacific about a week later, where steady organization led to the formation of a tropical depression around 12:00 UTC on May 31. Embedded within southwesterly flow around a large upper-level trough across northern Mexico, the depression moved steadily northeast in a favorable environment, and it intensified into Tropical Storm Beatriz by 06:00 UTC on June 1. After attaining peak winds of 45 mph (75 km/h), the system made landfall around 00:00 UTC on June 2 about 25 miles (40 km) west of Puerto Ángel. The mountainous terrain of Mexico quickly disrupted Beatriz, and it ultimately dissipated twelve hours later.[17]

In the state of Oaxaca, flights out of Bahías de Huatulco International Airport were cancelled, and schools were closed until at least June 3. Dozens of roads were rendered impassable due to mudslides and flooding; numerous locales received over 4 in (102 mm) of rain, with a storm total of 19.07 in (484.4 mm) in Huatulco.[17] Numerous landslides caused significant disruption across the state, especially by blocking Federal Highway 200 at many areas. A landslide in San Marcial Ozolotepec killed two girls and buried several houses, while another in San Carlos Yautepec killed a woman.[18] As of June 4, a total of seven people have been killed—five in Oaxaca and two in Tehuantepec.[19] Less than two weeks after Beatriz, Tropical Storm Calvin affected similar areas of Mexico and inflicted additional damage. Combined damage from the two systems reached at least 70 million pesos (US$3.9 million) in Oaxaca.[20]

Tropical Storm Calvin

Tropical storm (SSHWS)
 
DurationJune 11 – June 13
Peak intensity45 mph (75 km/h) (1-min);
1004 mbar (hPa)

In the second week of June, the NHC forecast the development of a broad area of low pressure a few hundred miles south of Mexico over the next several days.[21] This prediction came to fruition on June 9,[22] and the fledgling disturbance steadily organized into a tropical depression by 12:00 UTC on June 11 while located about 150 mi (240 km) south-southeast of Salina Cruz.[23] It was slow to organize initially amid moderate easterly wind shear as it drifted northwestwards;[24] by 18:00 UTC on June 12, however, the tropical depression intensified into Tropical Storm Calvin.[23] Intensifying slightly to reach winds of 45 mph (75 km/h),[23] Calvin made landfall halfway between Salina Cruz and Puerto Ángel, near Paja Blanca, around 00:00 UTC on June 13.[25] Just 12 hours later, Calvin dissipated into a remnant low.[23] The remnants of the storm caused heavy rainfall and some flooding in the area,[26] however no fatalities were reported.[23]

Hurricane Dora

Category 1 hurricane (SSHWS)
 
DurationJune 25 – June 28
Peak intensity90 mph (150 km/h) (1-min);
981 mbar (hPa)

On June 21, the NHC began monitoring a broad area of low pressure south of the Gulf of Tehuantepec for possible tropical cyclogenesis.[27] The disturbance organized into a tropical depression by 03:00 UTC on June 25,[28] and became a tropical storm six hours later, receiving the name Dora.[29] Progressing in a west-northwesterly direction at a steady speed, the storm began a 30-hour period of rapid intensification and became the first hurricane of the season at 09:00 UTC on June 26.[30] With impressive upper-level outflow and an eye apparent on satellite imagery,[31] the storm attained peak winds of 90 mph (150 km/h) by late on June 26.[32] Dora maintained its intensity for a number of hours before beginning to rapidly weaken over cooler sea surface temperatures and in an environment of drier air.[33] The storm later degenerated into a remnant low early on June 28, after all of the storm's deep convection had dissipated.[34]

The outer bands of Dora brought heavy rains to Guerrero, resulting in flash floods that inundated 20 homes. Overall damage was minor, however.[35]

Hurricane Eugene

Category 3 hurricane (SSHWS)
 
DurationJuly 7 – July 12
Peak intensity115 mph (185 km/h) (1-min);
965 mbar (hPa)

Hurricane Eugene developed from a disturbance located 765 mi (1,230 km) south of the southern tip of the Baja California Peninsula on July 7.[36] On the following day, Eugene underwent a period of rapid intensification; in an 18-hour period starting at 21:00 UTC on July 8, Eugene intensified from a tropical storm with 70 mph (110 km/h) winds to a Category 3 hurricane with 115 mph (185 km/h) winds, making it the first major hurricane of the season.[37][38] However, by 12 hours later, the entrainment of dry air caused Eugene to weaken to a Category 2 hurricane,[39] and due to traveling over cooler waters, Eugene weakened to a tropical storm on the following day.[40] As the coverage of deep convection steadily dwindled, Eugene fell to tropical depression intensity around 15:00 UTC on July 12 and degenerated to a remnant low six hours later.[41][42]

Dangerous rip currents combined with swells of 4 to 8 ft (1.2 to 2.4 m) across southern California resulted in hundreds of rescues. On July 10 alone, lifeguards in Huntington Beach made 200 rescues while 600 were made in Los Angeles County; lifeguards also responded to 700 medical emergencies.[43]

Hurricane Fernanda

Category 4 hurricane (SSHWS)
 
DurationJuly 12 – July 22
Peak intensity145 mph (230 km/h) (1-min);
947 mbar (hPa)

Late on July 10, the NHC began monitoring a broad area of low pressure several hundred miles southwest of Manzanillo. Contrary to predictions of gradual development,[44] the disturbance rapidly organized into a tropical depression by 03:00 UTC on July 12,[45] and further strengthened to become Tropical Storm Fernanda around 15:00 UTC that day.[46] The nascent cyclone initially battled moderate northeasterly wind shear, with its low-level circulation displaced to the northeastern edge of the deep convection.[47] This period of unfavorable upper-level winds was short-lived, and soon afterwards Fernanda commenced a period of rapid intensification, intensifying into a hurricane at 21:00 UTC on July 13.[48] A well-defined eye formed within a growing central dense overcast, and Fernanda further intensified into a major hurricane early on July 14.[49] Only six hours later, the system was upgraded to a Category 4 hurricane.[50] At 10.9°N, Fernanda became the second strongest hurricane to occur at such a low latitude in the Eastern Pacific, only behind 2015's Hurricane Olaf.[51]

With expansive upper-level outflow and spiral bands, a distinct eye, and a symmetric central dense overcast, Fernanda attained peak winds of 145 mph (230 km/h) around 03:00 UTC on July 15.[52] A series of microwave passes around that time began to indicate the formation of a secondary eyewall that halted the cyclone's development as it tracked west-northwest to northwest.[53] The eyewall replacement cycle concluded early on July 16, allowing Fernanda to remain a powerful hurricane amid favorable environmental conditions.[54] By late on July 18, however, cooler ocean temperatures and a more stable environment prompted the storm's weakening trend.[55] Fernanda fell below hurricane intensity shortly before entering the Central Pacific as it succumbed to stronger southwesterly wind shear,[56] and after failing to produce sustained deep convection, degenerated to a remnant low about 500 miles (805 km) east of Hilo, Hawaii, by 21:00 UTC on July 22.[57]

Tropical Storm Greg

Tropical storm (SSHWS)
 
DurationJuly 17 – July 26
Peak intensity60 mph (95 km/h) (1-min);
1001 mbar (hPa)

On July 12, the NHC forecast the formation of a broad area of low pressure south of Mexico over subsequent days.[58] The disturbance formed two days later and slowly organized into a tropical depression by 15:00 UTC on July 17.[59][60] The cyclone battled strong west-northwesterly wind shear after formation, intensifying into Tropical Storm Greg by 09:00 UTC on July 18 as deep convection burst near the center, but remained steady state for several days thereafter despite continued predictions of intensification.[61][62] Ultimately, given global models' poor handling of the environment, NHC lowered their intensity forecast for Greg.[63] The cyclone continued west for the remainder of its life and maintained a similar convective structure, with intermittent bursts of deep convection near the center.[64] Approaching the Central Pacific, Greg's low-level circulation became increasingly difficult to locate as it moved into a cooler, drier environment intertwined by increasing southerly wind shear, and the system weakened to a tropical depression around 21:00 UTC on July 25.[65] It degenerated to a remnant low 24 hours later.[66]

Tropical Depression Eight-E

Tropical depression (SSHWS)
 
DurationJuly 18 – July 20
Peak intensity35 mph (55 km/h) (1-min);
1007 mbar (hPa)

A low-pressure trough began producing disorganized convection over the waters of the Pacific Ocean, well to the south of Baja California Peninsula, on July 14.[67] Despite only marginally conducive environmental conditions, the disturbance began to show signs of organization two days later,[68] and it attained tropical depression status by 15:00 UTC on July 18.[69] Strong west-northwesterly wind shear confined the storm's intermittent bursts of convection well to the southwest of its low-level circulation, and the depression consequently failed to produce winds above 35 mph (55 km/h).[70] The system's center later degenerated into a low-pressure trough within the Intertropical Convergence Zone, prompting the NHC to discontinue advisories at 21:00 UTC on July 20.[71]

Hurricane Hilary

Category 2 hurricane (SSHWS)
 
DurationJuly 21 – July 31
Peak intensity105 mph (165 km/h) (1-min);
972 mbar (hPa)

Part of an exceptionally active July, the NHC began highlighting the far eastern reaches of the Pacific basin on July 19 for tropical development in later days.[72] A large area of disturbed weather progressed westward across Costa Rica later that day,[73] steadily organizing into a tropical depression by 15:00 UTC on July 21.[74] The cyclone failed to organize immediately after formation, and its low-level center migrated to the southern extent of associated convection.[75] By 03:00 UTC on July 23, though, better defined banding features and a more organized convective structure led the NHC to designate the system as Tropical Storm Hilary.[76] Over the coming hours, the cyclone's convective structure evolved into a small central dense overcast while hints of an eye became apparent;[77] in accordance with satellite estimates, Hilary was upgraded to a hurricane at 09:00 UTC on July 24.[78] A moist environment and warm ocean waters propelled Hilary to its peak as a Category 2 hurricane with winds of 105 mph (165 km/h) 24 hours later, at which time its core was most symmetric.[79] After maintaining its intensity, the hurricane began to weaken late on July 26 as northerly wind shear increased.[80] It fell back to tropical storm intensity around 03:00 UTC on July 27 and ultimately degenerated to a remnant low four days later.[81][82]

Hurricane Irwin

Category 1 hurricane (SSHWS)
 
DurationJuly 22 – August 1
Peak intensity90 mph (150 km/h) (1-min);
980 mbar (hPa)

On July 16, the NHC highlighted the expected formation of an area of low pressure south of Mexico later that week.[83] A tropical wave began producing disorganized cloudiness three days later,[72] and the broad system slowly organized into a tropical depression by 15:00 UTC on July 22.[84] Its structure changed little after formation, impinged by strong wind shear; despite this, satellite wind data indicated the cyclone intensified into Tropical Storm Irwin by 09:00 UTC on July 23.[85] Over the next 24 hours, deep convection began to wrap around the center and a mid-level eye formed as environmental conditions improved;[86] by 09:00 UTC on July 25, Irwin intensified into a hurricane.[87] Although coolest cloudtops were located in the western semicircle of the system, a well-defined eye and convection in the eyewall propelled Irwin to its peak with winds of 90 mph (150 km/h) late on July 25.[88] Almost immediately, outflow from nearby Hurricane Hilary increased wind shear over the system and caused it to begin weakening;[89] Irwin rapidly fell to tropical storm strength around 15:00 UTC on July 26.[90] Contrary to projections of continued weakening, however, the storm's cloud pattern maintained or even improved over subsequent days as it passed over marginal ocean temperatures.[91] Finally, after losing its deep convection and being reduced to a swirl of low-level clouds, Irwin was declared a remnant low around 21:00 UTC on August 1.[92]

Tropical Depression Eleven-E

Tropical depression (SSHWS)
 
DurationAugust 4 – August 5
Peak intensity35 mph (55 km/h) (1-min);
1004 mbar (hPa)

On July 28, the NHC advertised the likely development of an area of low pressure well south of Mexico over subsequent days.[93] An area of disorganized showers and thunderstorms associated with a tropical wave materialized three days later, but little change occurred thereafter.[94] Early on August 3, a surface circulation formed in association with concentrating convection,[95] and this process led to the formation of a tropical depression by 15:00 UTC the next day.[96] The newly formed cyclone did not intensify after designation, and its low- and mid-level circulations separated by over 265 mi (425 km) on August 5.[97] Falling short of the tropical cyclone criteria, the short-lived depression was declared a remnant low at 21:00 UTC that day.[98]

Tropical Storm Jova

Tropical storm (SSHWS)
 
DurationAugust 12 – August 14
Peak intensity40 mph (65 km/h) (1-min);
1003 mbar (hPa)

The NHC began monitoring a strong tropical wave over the eastern Caribbean on August 3.[99] The feature pushed westward, developing into Hurricane Franklin before making landfall on the Yucatán,[100] and attaining its peak as a Category 1 hurricane before making landfall near Vega de Alatorre, Veracruz on August 10.[101] Although its low-level circulation dissipated, the NHC in days prior noted the potential for Franklin's mid-level remnants to reform in the East Pacific.[102] The remnants of Franklin induced a surface low off the coast of southwestern Mexico on August 11, and steady organization led to the formation of Tropical Storm Jova by 03:00 UTC the next day.[103] On a westward course, Jova was plagued by strong wind shear from an area of high pressure over northwestern Mexico, with a very disorganized appearance on satellite.[104] After lacking sufficient organization to be declared a tropical cyclone, the storm was declared a remnant low around 03:00 UTC on August 14.[105]

Hurricane Kenneth

Category 4 hurricane (SSHWS)
 
DurationAugust 18 – August 23
Peak intensity130 mph (215 km/h) (1-min);
952 mbar (hPa)

On August 12, the NHC noted the potential for an area of low pressure to form well south of Baja California Peninsula during the following days.[106] A large area of disturbed weather developed two days later as predicted;[107] however, organization was slow to occur, and a tropical depression only formed four days later, around 15:00 UTC on August 18.[108] The newly formed cyclone embarked on a west to west-northwest course, intensifying into Tropical Storm Kenneth early on August 19 and further into a hurricane by 15:00 UTC on August 20.[109] Despite forecasts of only slight additional intensification,[110] Kenneth rapidly intensified, with the eye feature warming dramatically and the surrounding cloud tops cooling. The cyclone attained major hurricane strength around 03:00 UTC on August 21,[111] and six hours later reached its peak as a Category 4 hurricane with sustained winds of 130 mph (215 km/h).[112] Progressively cooler sea surface temperatures and increasing wind shear caused Kenneth to steadily weaken following the intensification trend, with its inner core eroding and low-level circulation becoming displaced.[113] By 21:00 UTC on August 22, the storm weakened below hurricane strength.[114] The following day, at 21:00 UTC, Kenneth was declared post-tropical.

Tropical Storm Lidia

Tropical storm (SSHWS)
 
DurationAugust 30 – September 3
Peak intensity65 mph (100 km/h) (1-min);
987 mbar (hPa)
Main article: Tropical Storm Lidia (2017)

On August 29, the NHC monitored a potential area of Tropical Cyclone development near the coast of Baja California with Tropical Storm Watches and Hurricane Watches stretching from Todos Santos to Los Barriles.[115] The NHC initiated advisories on Tropical Storm Lidia at 00:00 UTC on August 31 about 180 mi (290 km) south-southeast of the southern tip of the Baja California Peninsula. Favorable conditions allowed Lidia to intensify, and by 21:00 UTC on August 31, the storm peaked with maximum sustained winds of 65 mph (100 km/h) and a minimum atmospheric pressure of 987 mbar (29.1 inHg). Around 12:00 UTC on the following day, Lidia made landfall near Puerto Chale, Baja California Sur, at the same intensity. The cyclone weakened significantly while traversing the mountainous terrain of the Baja California Peninsula, and by early on September 2, deep convection was mainly limited to a few strong clusters near the center. Around that time, Lidia briefly moved offshore, before making another landfall near Punta Abreojos a few hours later. By that time, Lidia had weakened steadily, and emerged over the Pacific Ocean on September 2. However, Lidia continued to weaken due to cold sea surface temperatures. After failing to produce deep convection for about 12–15 hours, the NHC declared that Lidia had degenerated into a remnant low-pressure area at 09:00 UTC on September 2 about 40 mi (65 km/h) southwest of Punta Baja, Baja California.

Hurricane Otis

Category 3 hurricane (SSHWS)
 
DurationSeptember 11 – September 19
Peak intensity115 mph (185 km/h) (1-min);
965 mbar (hPa)

On September 8, Hurricane Katia of the Atlantic made landfall on Mexico, dissipating on September 9. However, its mid-level circulation survived, and eventually spawned an area of low pressure off the coast of Mexico. On September 11, the system organized into Tropical Depression Fifteen-E. During the next several days, the depression slowly drifted westward, before strengthening into Tropical Storm Otis on September 16. While only marginal strengthening was forecast, Otis unexpectedly rapidly intensified into a Category 2 hurricane by 17:00 UTC on September 17, despite lower ocean temperatures, drier air, and increased wind shear.[116] Otis continued to intensify into a Category 3 major hurricane by 03:00 UTC on September 18, developing a well-defined eye with a diameter of 10 nautical miles (12 mi; 19 km).[117] By 21:00 UTC on September 18, Otis had rapidly degenerated back into a tropical storm with maximum sustained winds of 40 knots (46 mph; 74 km/h).[118] Twelve hours after developing a well-defined eye, Otis started weakening at a remarkable rate, losing most of its deep convection from low ocean surface temperatures until it became a remnant low on September 19, due to a lack of convection.[119][120]

Hurricane Max

Category 1 hurricane (SSHWS)
 
DurationSeptember 13 – September 15
Peak intensity85 mph (140 km/h) (1-min);
985 mbar (hPa)

On September 9, the NHC mentioned the possibility for an area of low pressure to form south of Mexico over later days.[121] A trough of low pressure materialized the next day,[122] steadily organizing into a tropical depression near the southwestern coast of Mexico around 15:00 UTC on September 13. Despite forecasts of little or no intensification,[123] the newly formed cyclone intensified into Tropical Storm Max six hours later.[124] Quick intensification ensued as the storm improved in structure and developed a well-defined eye, prompting the NHC to upgrade Max to a hurricane around 12:00 UTC on September 14.[125] After attaining peak winds of 85 mph (140 km/h),[126] the hurricane moved ashore the coastline of Guerrero at a slightly reduced strength around 21:00 UTC.[127] The mountainous terrain of inland Mexico severely disrupted Max's circulation, causing it to degenerate by 09:00 UTC on September 15.[128]

In preparation for Max, about 788 people evacuated to temporary shelters.[129] Throughout Guerrero, over 1,500 homes were inundated by floodwaters or damaged by strong winds that ripped off roofs. Over 100 trees were downed, mudslides and sinkholes closed several roads (including Mexican Federal Highway 200), and telephone service was cut. At the height of the storm, 126,503 Comisión Federal de Electricidad customers lost electricity. A bridge between Cruz Grande and Copala was severely damaged, and access to Juchitán de Zaragoza was severed due to a flooded highway. One of 17 rapidly-rising rivers swept away a residence and two neighbors who attempted to rescue the homeowner; one of the neighbors died, constituting one of two deaths attributed to the storm. At least 3,000 residents across five municipalities in Guerrero were stranded.[129][130] Waves of 10–16 ft (3–5 m) battered the coastline, where six ships were sunk.[131]

Hurricane Norma

Category 1 hurricane (SSHWS)
 
DurationSeptember 14 – September 20
Peak intensity75 mph (120 km/h) (1-min);
985 mbar (hPa)

Since around September 10, the NHC has monitored a tropical wave, which further developed into a depression and Tropical Storm Norma. The storm was originally predicted to quickly become a hurricane, with some models suggesting that Norma could become a major hurricane before impacting the Baja California peninsula. However, the storm only briefly became a weak Category 1, and its track shifted further west, eliminating the possibility of landfall in areas previously impacted by Lidia.[citation needed]

Tropical Storm Pilar

Tropical storm (SSHWS)
 
DurationSeptember 23 – September 25
Peak intensity45 mph (75 km/h) (1-min);
1002 mbar (hPa)

The NHC monitored a tropical wave, which eventually developed into a tropical storm on September 23 and was given the name Pilar. The storm was weak and eventually weakened into a low during September 25. Pilar caused minor damage in western Mexico near the city of Mazatlán.

Storm names

Main articles: Tropical cyclone naming, History of tropical cyclone naming, and List of historic tropical cyclone names

The following names will be used for named storms that form in the northeastern Pacific Ocean during 2017. Retired names, if any, will be announced by the World Meteorological Organization in the spring of 2018. The names not retired from this list will be used again in the 2023 season.[132] This same list was used in the 2011 season.

  • Adrian
  • Beatriz
  • Calvin
  • Dora
  • Eugene
  • Fernanda
  • Greg
  • Hilary
  • Irwin
  • Jova
  • Kenneth
  • Lidia
  • Max
  • Norma
  • Otis
  • Pilar
  • Ramon (unused)
  • Selma (unused)
  • Todd (unused)
  • Veronica (unused)
  • Wiley (unused)
  • Xina (unused)
  • York (unused)
  • Zelda (unused)

For storms that form in the Central Pacific Hurricane Center's area of responsibility, encompassing the area between 140 degrees west and the International Date Line, all names are used in a series of four rotating lists.[133] The next four names slated for use are shown below.

  • Walaka (unused)
  • Akoni (unused)
  • Ema (unused)
  • Hone (unused)

The usage of the Atlantic storm name "Don", and the name "Hilary", in July garnered some negative attention relating to United States President Donald Trump, and former Presidential candidate Hillary Clinton. People also took to Twitter to poke fun at the names and both individuals with political jokes.[134]

Season effects

This is a table of all the storms that have formed in the 2017 Pacific hurricane season. It includes their duration, names, landfall(s), denoted in parentheses, damages, 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 the damage figures are in 2017 USD.

Saffir–Simpson scale
TD TS C1 C2 C3 C4 C5
2017 Pacific hurricane season statistics
Storm
name 		Dates active Storm category
at peak intensity 		Max 1-min
wind
mph (km/h) 		Min.
press.
(mbar) 		Areas affected Damage
(USD) 		Deaths Ref(s)
Adrian May 9 – 11 Tropical storm 45 (75) 1004 None None None
Beatriz May 31 – June 2 Tropical storm 45 (75) 1001 Southwestern Mexico 3.9 7
Calvin June 11 – 13 Tropical storm 45 (75) 1004 Southwestern Mexico, Guatemala Unknown None
Dora June 25 – 28 Category 1 hurricane 90 (150) 981 Southwestern Mexico, Revillagigedo Islands Minimal None
Eugene July 7 – 12 Category 3 hurricane 115 (185) 965 Baja California Peninsula, California None None
Fernanda July 12 – 22 Category 4 hurricane 145 (230) 947 Hawaii None None
Greg July 17 – 26 Tropical storm 60 (95) 1001 None None None
Eight-E July 18 – 20 Tropical depression 35 (55) 1007 None None None
Hilary July 21 – 31 Category 2 hurricane 105 (165) 972 Southwestern Mexico None None
Irwin July 22 – August 1 Category 1 hurricane 90 (150) 980 None None None
Eleven-E August 4 – 5 Tropical depression 35 (55) 1004 Revillagigedo Islands None None
Jova August 12 – 14 Tropical storm 40 (65) 1003 Western Mexico, Revillagigedo Islands None None
Kenneth August 18 – 23 Category 4 hurricane 130 (215) 952 None None None
Lidia August 30 – September 3 Tropical storm 65 (100) 987 Revillagigedo Islands, Western Mexico, Baja California Peninsula, Arizona, California Unknown 7
Otis September 11 – 19 Category 3 hurricane 115 (185) 965 None None None
Max September 13 – 15 Category 1 hurricane 85 (140) 985 Southern Mexico Unknown 2
Norma September 14 – 20 Category 1 hurricane 75 (120) 985 Revillagigedo Islands, Baja California Peninsula Minimal None
Pilar September 23 – 25 Tropical storm 45 (75) 1002 Western Mexico Unknown None
Season aggregates
18 systems May 9 –
Season ongoing 		  145 (230) 947 3.9 16  

See also

Footnotes

  1. ^ A major hurricane is a storm that ranks as Category 3 or higher on the Saffir–Simpson scale.
  2. ^ The totals represent the sum of the squares for every (sub)tropical storm's intensity of over 33 knots (38 mph, 61 km/h), divided by 10,000. Calculations are provided at Talk:2017 Pacific hurricane season/ACE calcs.

References

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External links

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