Hurricane Iniki

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Hurricane Iniki
Category 4 major hurricane (SSHWS/NWS)
Iniki 1992-09-11 2331.png
Hurricane Iniki at peak intensity just south of KauaʻI on September 11
FormedSeptember 5, 1992
DissipatedSeptember 13, 1992
Highest winds 1-minute sustained:145 mph (230 km/h)
Lowest pressure938 mbar (hPa); 27.7 inHg
Fatalities6 total
Damage$3.1 billion (1992 USD)
Areas affected Hawaii (particularly Kauaʻi)
Part of the 1992 Pacific hurricane season

Hurricane Iniki ( /ˈnk/ ee-NEE-kee; Hawaiian: ʻiniki meaning "strong and piercing wind") was the most powerful hurricane to strike the U.S. state of Hawaii in recorded history. [1] Forming on September 5, 1992, during the strong 1990–95 El Niño, Iniki was one of eleven Central Pacific tropical cyclones during that season. It attained tropical storm status on September 8 and further intensified into a hurricane the next day. After turning north, Iniki struck the island of Kauaʻi on September 11 at peak intensity; it had winds of 145 miles per hour (233 km/h) and reached Category 4 on the Saffir–Simpson hurricane scale. It had recorded wind gusts of 225 as evidenced by an anemometer that was found blown into the forest during clean up. It was the first hurricane to hit the state since Hurricane Iwa in the 1982 season, and the first major hurricane since Hurricane Dot in 1959. Iniki dissipated on September 13 about halfway between Hawaii and Alaska.

The Hawaiian language is a Polynesian language that takes its name from Hawaiʻi, the largest island in the tropical North Pacific archipelago where it developed. Hawaiian, along with English, is an official language of the State of Hawaii. King Kamehameha III established the first Hawaiian-language constitution in 1839 and 1840.

1992 Pacific hurricane season hurricane season in the Pacific Ocean

The 1992 Pacific hurricane season was the most active Pacific hurricane season on record, featuring 27 named storms, and the second-costliest Pacific hurricane season in history, behind only the 2013 season. The season also produced the second-highest ACE value on record in the basin, surpassed by the 2018 season. The season officially started on May 15 in the eastern Pacific, and on June 1 in the central Pacific, and lasted until November 30. These dates conventionally delimit the period of each year when most tropical cyclones form in the northeastern Pacific Ocean. However, these bounds were easily exceeded when Hurricane Ekeka formed on January 28 and again a couple months later with Tropical Storm Hali.

Contents

Iniki caused around $3.1 billion (1992 USD) in damage and six deaths. At the time, Iniki was among the costliest United States hurricanes. The storm struck just weeks after Hurricane Andrew, the costliest tropical cyclone ever at the time, struck Florida.

Hurricane Andrew Category 5 Atlantic hurricane in 1992

Hurricane Andrew was a destructive Category 5 Atlantic hurricane that struck the Bahamas, Florida, and Louisiana in mid-to-late August 1992. It was the most destructive hurricane to ever hit Florida until Hurricane Irma surpassed it 25 years later. It was the strongest in decades and the costliest hurricane to make landfall anywhere in the United States until it was surpassed by Katrina in 2005. Andrew caused major damage in the Bahamas and Louisiana, but the greatest impact was felt in South Florida, where the storm made landfall as a Category 5 hurricane, with sustained wind speeds as high as 165 mph (270 km/h). Passing directly through the city of Homestead in Dade County, Andrew stripped many homes of all but their concrete foundations. In total, Andrew destroyed more than 63,500 houses, damaged more than 124,000 others, caused $27.4 billion in damage, and left 65 people dead.

Florida State of the United States of America

Florida is the southernmost contiguous state in the United States. The state is bordered to the west by the Gulf of Mexico, to the northwest by Alabama, to the north by Georgia, to the east by the Atlantic Ocean, and to the south by the Straits of Florida. Florida is the 22nd-most extensive, the 3rd-most populous, and the 8th-most densely populated of the U.S. states. Jacksonville is the most populous municipality in the state and the largest city by area in the contiguous United States. The Miami metropolitan area is Florida's most populous urban area. Tallahassee is the state's capital.

The Central Pacific Hurricane Center (CPHC) failed to issue tropical cyclone warnings and watches 24 hours in advance. Despite the lack of early warning, only six deaths ensued. Damage was greatest on Kauaʻi, where the hurricane destroyed more than 1,400 houses and severely damaged more than 5,000. Though not directly in the path of the eye, Oʻahu experienced moderate damage from wind and storm surge.

Central Pacific Hurricane Center

The Central Pacific Hurricane Center (CPHC) of the United States National Weather Service is the official body responsible for tracking and issuing tropical cyclone warnings, watches, advisories, discussions, and statements for the Central Pacific region: from the equator northward, 140°W–180°W, most significantly for Hawai‘i. It is the Regional Specialized Meteorological Center (RSMC) for tropical cyclones in this region, and in this capacity is known as RSMC Honolulu.

Tropical cyclone warnings and watches are two levels of alert issued by national weather forecasting bodies to coastal areas threatened by the imminent approach of a tropical cyclone of tropical storm or hurricane intensity. They are notices to the local population and civil authorities to make appropriate preparation for the cyclone, including evacuation of vulnerable areas where necessary. It is important that interests throughout the area of an alert make preparations to protect life and property, and do not disregard it on the strength of the detailed forecast track. Tropical cyclones are not points, and forecasting their track remains an uncertain science.

Oahu The third-largest of the Hawaiian Islands and site of the state capital Honolulu

Oʻahu, known as "The Gathering Place", is the third-largest of the Hawaiian Islands. It is home to roughly one million people—about two-thirds of the population of the U.S. state of Hawaiʻi. The state capital, Honolulu, is on Oʻahu's southeast coast. Including small associated islands such as Ford Island and the islands in Kāneʻohe Bay and off the eastern (windward) coast, its area is 596.7 square miles (1,545.4 km2), making it the 20th-largest island in the United States.

Meteorological history

Map plotting the track and the intensity of the storm, according to the Saffir-Simpson scale Iniki 1992 track.png
Map plotting the track and the intensity of the storm, according to the Saffir–Simpson scale

The origin of Iniki is unclear, but it possibly began as a tropical wave that exited the African coast on August 18. It moved westward across the unfavorable Atlantic Ocean and crossed Central America into the Pacific on August 28. The wave continued rapidly westward and remained disorganized. Conditions slowly became more favorable, and, as the convection concentrated around a center, the wave was classified Tropical Depression Eighteen-E on September 5. At this time, the wave was located 1700 miles (2700 km) southwest of Cabo San Lucas or 1550 miles (2500 km) east-southeast of Hilo. [1] Initially, the thunderstorm activity was not concentrated towards the center and thus the depression was not expected to intensify beyond minimal tropical storm strength. [2] The depression continued quickly westward and remained weak until September 8, when it slowed enough to strengthen to a tropical storm. [1] Located at the southern periphery of a subtropical ridge, Iniki continued westward and strengthened over the unusually favorable central Pacific; it reached hurricane status on September 9 while 470 miles (760 km) south-southeast of Hilo. The subtropical ridge, which typically keeps hurricanes well away from the Hawaiian Islands, weakened due to an approaching upper level-trough and allowed Iniki to turn to the northwest. With very favorable upper-level outflow and warm water temperatures, Iniki steadily intensified, and attained major hurricane status on September 10 while south-southwest of the island chain. [1]

Tropical wave type of atmospheric trough

Tropical waves, easterly waves, or tropical easterly waves, also known as African easterly waves in the Atlantic region, are a type of atmospheric trough, an elongated area of relatively low air pressure, oriented north to south, which moves from east to west across the tropics, causing areas of cloudiness and thunderstorms. West-moving waves can also form from the tail end of frontal zones in the subtropics and tropics, and may be referred to as easterly waves, but these waves are not properly called tropical waves; they are a form of inverted trough sharing many characteristics with fully tropical waves. All tropical waves form in the easterly flow along the equatorward side of the subtropical ridge or belt of high pressure which lies north and south of the Intertropical Convergence Zone (ITCZ). Tropical waves are generally carried westward by the prevailing easterly winds along the tropics and subtropics near the equator. They can lead to the formation of tropical cyclones in the north Atlantic and northeastern Pacific basins. A tropical wave study is aided by Hovmöller diagrams, a graph of meteorological data.

Central America central geographic region of the Americas

Central America is located on the southern tip of North America, or is sometimes defined as a subcontinent of the Americas, bordered by Mexico to the north, Colombia to the southeast, the Caribbean Sea to the east, and the Pacific Ocean to the west and south. Central America consists of seven countries: Belize, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, and Panama. The combined population of Central America has been estimated to be 41,739,000 and 42,688,190.

Cabo San Lucas City in Baja California Sur, Mexico

Cabo San Lucas, or simply Cabo, is a resort city at the southern tip of the Baja California Peninsula, in the Mexican state of Baja California Sur. As of 2015, the population of the city was 81,111 inhabitants. Cabo San Lucas together with San José del Cabo is known as Los Cabos. Together they form a metropolitan area of 305,983 inhabitants.

Iniki (left) as a newly formed tropical storm next to Hurricane Orlene Iniki 08 sept 1992 0256Z.jpg
Iniki (left) as a newly formed tropical storm next to Hurricane Orlene

As Iniki turned to the north, it continued to strengthen, reaching a peak of 145 mph (235 km/h) winds on September 11 while 170 miles (270 km) south-southwest of Poʻipū on the island of Kauaʻi. It continued rapidly to the north-northeast, and made landfall on south-central Kauai early on the 11th with sustained winds of 145 mph (235 km/h), making Iniki a Category 4 hurricane on the Saffir-Simpson Hurricane Scale. The National Weather Service reported wind gusts of up to 175 mph (280 km/h). The highest recorded wind speed from Hurricane Iniki was a 227 mph (365 km/h) reading [3] from the Navy's Makaha Ridge radar station. According to the Honolulu Advertiser, that remarkable figure was recorded at a digital weather station whose wind gauging equipment blew off after taking the measurement during the storm. After crossing the island, Iniki rapidly accelerated north-northeastward, weakened rapidly, and was absorbed by a cold front as it lost tropical characteristics and became extratropical, on September 13, about halfway between Alaska and Hawaiʻi. [1]

Poipu, Hawaii Census-designated place in Hawaii, United States

Poʻipū is a census-designated place (CDP) in Kauaʻi County on the southern side of the island of Kauaʻi in the U.S. state of Hawaiʻi. The population was 979 at the 2010 census. The town features a group of high-end hotels, resorts and one main shopping center.

Extratropical cyclone type of cyclone

Extratropical cyclones, sometimes called mid-latitude cyclones or wave cyclones, are low-pressure areas which, along with the anticyclones of high-pressure areas, drive the weather over much of the Earth. Extratropical cyclones are capable of producing anything from cloudiness and mild showers to heavy gales, thunderstorms, blizzards, and tornadoes. These types of cyclones are defined as large scale (synoptic) low pressure weather systems that occur in the middle latitudes of the Earth. In contrast with tropical cyclones, extratropical cyclones produce rapid changes in temperature and dew point along broad lines, called weather fronts, about the center of the cyclone.

Alaska State of the United States of America

Alaska is a U.S. state in the northwest extremity of North America, just across the Bering Strait from Asia. The Canadian province of British Columbia and territory of Yukon border the state to the east and southeast. Its most extreme western part is Attu Island, and it has a maritime border with Russia to the west across the Bering Strait. To the north are the Chukchi and Beaufort seas—southern parts of the Arctic Ocean. The Pacific Ocean lies to the south and southwest. It is the largest U.S. state by area and the seventh largest subnational division in the world. In addition, it is the 3rd least populous and the most sparsely populated of the 50 United States; nevertheless, it is by far the most populous territory located mostly north of the 60th parallel in North America: its population—estimated at 738,432 by the United States Census Bureau in 2015— is more than quadruple the combined populations of Northern Canada and Greenland. Approximately half of Alaska's residents live within the Anchorage metropolitan area. Alaska's economy is dominated by the fishing, natural gas, and oil industries, resources which it has in abundance. Military bases and tourism are also a significant part of the economy.

Preparations

The Central Pacific Hurricane Center (CPHC) failed to issue tropical cyclone warnings and watches for the hurricane well in advance. For several days prior to the disaster, the CPHC and the news media forecast Iniki to remain well south of the island chain, with the only effect being some high surf conditions. Some of the standard international computer models were indicating a northward turn towards the populated Hawaiian Islands, but these were rejected by the CPHC forecasters. As late as early September 10, the CPHC suggested that Iniki would remain well to the south of the island group. It was not until a special bulletin was issued by the CPHC less than 24 hours before landfall—that any warning was given to the public. [4]

A hurricane watch was issued for Kauaʻi early on September 11 and was upgraded to a hurricane warning later that day. [1] Prior to Iniki's arrival in Kauaʻi, 8,000 people were housed in shelters, many of whom remembered Hurricane Iwa 10 years prior. [5] Because schools were canceled, traffic was light during the evacuation, and streets were clear by mid-morning. Rather than sending tourists to public shelters, two major hotels kept their occupants in the buildings during the storm's passage. [5]

The CPHC issued a tropical storm warning for Oʻahu on September 11 which was upgraded to a hurricane warning later that day. [1] Though not hit by the hurricane, Iniki's large wind field caused nearly 30,000 people to evacuate to 110 public shelters in Oʻahu. Public school buildings acted as shelters, and were for refuge only, meaning they did not provide food, cots, blankets, medications or other comfort items. Roughly one-third of Oʻahu's population participated in the evacuation, though many others went to the house of a family member or friend for shelter. The execution of the evacuations went well, beginning with the vulnerable coastal area. For those in need, vans and buses gave emergency transportation, while police manned certain overused intersections. The two main problems that occurred during the evacuation were lack of parking at shelters and exit routes for the coastlines. [5]

Impact

Costliest Pacific hurricanes
StormSeason US$ damageRef.
Manuel 2013 $4.2 billion [6]
Iniki 1992 $3.1 billion [7]
Beatriz 1993 $1.7 billion [8]
Odile 2014 $1.22 billion [9]
Agatha 2010 $1.1 billion [10]
Willa 2018 $537 million [11] [12] [13] [14]
Paul 1982 $520 million [15] [16] [17]
Octave 1983 $513 million [18]
Norman 1978 $500 million [19] [20]
Patricia 2015 $460 million [21] [22] [23] [24]

Hurricane Iniki was the costliest hurricane to strike the state of Hawaiʻi, causing $3.1 billion in damage. [7] Most damage was on the island of Kauaʻi, where the storm destroyed thousands of homes and left a large amount of the island without power, although Oʻahu also suffered significant damage. Iniki also was responsible for six deaths. [1]

The hurricane nearly struck the Central Pacific Hurricane Center in Honolulu. Had it hit there, Iniki, along with Hurricane Andrew and Typhoon Omar, would have struck each of the three National Weather Service offices responsible for tropical cyclone warnings within a two-month period. [4]

Kauaʻi

Hurricane Iniki made landfall on the south-central portion of Kauaʻi island, bringing its dangerous inner core to the entire island. [1] Upon making landfall the hurricane produced storm tides of 4.5–6 feet (1.4–1.8 m), with some portions of the coastlines having high-water marks of up to 18 feet (5.5 m). In addition, strong waves of up to 35 feet (10.5 m) in height crashed along the southern coastline for several hours, causing a debris line of more than 800 feet (250 m) inland. Because it moved quickly through the island, there were no reports of significant rainfall. [5]

Hurricane Iniki making landfall on Kaua`i Hurricane Iniki.jpg
Hurricane Iniki making landfall on Kauaʻi

Hurricane Iniki's making landfall during daylight hours, combined with the popularity of camcorders, led many Kauaʻi residents to record much of the damage as it was occurring. The footage was later used to create an hour-long video documentary. [25] Commercial air service was suspended. [26]

Wind damage to trees from Iniki Iniki Tree Winds.jpg
Wind damage to trees from Iniki

Hurricane Iniki's high winds caused extensive damage in Kauaʻi. 1,421 houses were destroyed, and 63 were lost from the storm surge and wave action. A total of 5,152 homes were severely damaged, while 7,178 received minor damage. [1] On the south coast, hotels and condominiums received severe damage as well. A few were restored quickly, though some took several years to be rebuilt. One hotel—the Coco Palms Resort famous for Elvis Presley's Blue Hawaii —never reopened after the hurricane. [27] Destroyed housing across the island left more than 7,000 people homeless after the storm's passage. [28]

Sidewalk and tree damage from Iniki Iniki Damaged Sidewalk.jpg
Sidewalk and tree damage from Iniki

Iniki's high winds also downed 26.5% of the island's transmission poles, 37% of its distribution poles, and 35% of its 800 mile (1300 km) distribution wire system. The entire island lacked electricity and television service for an extended period of time. [28] Electric companies restored only 20% of the island's power service within four weeks of Iniki, while other areas were without power for up to three to four months. Also affected by the storm was the agricultural sector. [1] Though much of the sugar cane was already harvested, [28] what was left was severely damaged. The winds destroyed tender tropical plants like bananas and papayas and uprooted or damaged fruit and nut trees. [1]

Most of Iniki's damage occurred in Kauaʻi. On the island, one person died when struck by debris, while another lost her life when a portion of her house fell on her. Offshore, two Japanese nationals died when their boat capsized. The reduced death toll was likely due to well-executed warnings and preparation. More than 100 injuries can be attributed to Iniki, though most occurred in the aftermath of the hurricane. [1]

Among those on Kauaʻi was filmmaker Steven Spielberg, who was preparing for the final day of on-location shooting of the film Jurassic Park . He and the 130 of his cast and crew remained safely in a hotel during Iniki's passage. [29] [30] According to Spielberg, "every single structure was in shambles; roofs and walls were torn away; telephone poles and trees were down as far as the eye could see." Spielberg included footage of Iniki battering the Kaua'i coastal walls as part of the completed film, where a tropical storm makes up a pivotal part of the plot. Members of the film's crew helped to clear some of the debris off of nearby roads. [29]

Oʻahu

Upon passing by Oʻahu, Iniki produced tides of 1.7–3 feet (0.5–0.9 m) above normal. [5] Prolonged periods of high waves severely eroded and damaged the southwestern coast of Oʻahu, with the areas most affected being Barbers Point through Kaʻena. [1] The Waiʻanae coastline experienced the most damage, with waves and storm surge flooding the second floor of beachside apartments. [31] In all, Hurricane Iniki caused several million dollars in property damage, [5] and two deaths on Oʻahu. [1]

Big Island

Damage on the Island of Hawai‘i was minor. Seas of 10 ft (3.0 m) were reported, along with 40 mph (65 km/h) winds. [32] In Honokōhau Harbor, three or four sailboats were tossed onto the rocks and one trimaran at another harbor was sunk. A beach near Napoʻopoʻo on Kealakekua Bay lost some sand and to this day has never been the same. [33]

Aftermath

Landfalling Pacific major hurricanes
Intensity is measured solely by wind speed
HurricaneSeasonWind speedRef.
Patricia 2015 150  mph (240  km/h) [34]
Madeline 1976 145 mph (230 km/h) [35]
Iniki 1992 [1]
Twelve 1957 140 mph (220 km/h) [36]
"Mexico" 1959 [36]
Kenna 2002 [37]
Olivia 1967 125 mph (205 km/h) [36]
Tico 1983 [38]
Lane 2006 [39]
Odile 2014 [40]
Olivia 1975 115 mph (185 km/h) [41]
Liza 1976 [35]
Kiko 1989 [42]
Willa 2018 [43]
Storm surge from Iniki Iniki Storm Surge.jpg
Storm surge from Iniki

Immediately after the storm, many were relieved to have survived the worst of the Category 4 hurricane; their complacency turned to apprehensiveness due to lack of information, as every radio station was out and there was no news available for several days. Because Iniki knocked out electrical power for most of the island, communities held parties to necessarily consume perishable food from unpowered refrigerators and freezers. Though food markets allowed those affected to take what they needed, many Kauaʻi citizens insisted on paying. In addition, entertainers from all of Hawaiʻi, including Graham Nash (who owns a home on the north shore of Kauaʻi) and the Honolulu Symphony, provided free concerts to the victims. [27]

The film Jurassic Park was being filmed at the time; the sets used for the deleted scene where Mr. Arnold goes to the shed to turn the power on were destroyed, and the cast and crew took shelter in a hotel. Shots of Iniki made it in to the final film. Looting occurred in the aftermath of Iniki, though it was very minor. A group of Army Corps of Engineers, who experienced the looting of Hurricane Andrew just weeks before, were surprised at the overall calmness and lack of violence on the island. Although electrical power was restored to most of the island approximately six weeks following the hurricane, students returned to Kauaʻi public schools two weeks after the disaster. Kauaʻi citizens remained hopeful for monetary aid from the government or insurance companies, though after six months they felt annoyed with the lack of help. [27] The military effectively provided aid for their immediate needs, though, and help arrived before local officials requested aid. [44]

Amateur radio proved to be extremely helpful during the three weeks after the storm, with volunteers coming from the neighboring islands as well as from around the Pacific to assist in the recovery. There was support of local government communications in Lihue in the first week of recovery [31] as well as a hastily organized effort by local operators to assist with the American Red Cross and their efforts to provide shelters and disaster relief centers across Kauaʻi. [45]

In the months after the storm, many insurance companies left Hawaiʻi. To combat this, State Governor John D. Waihee III enacted the Hurricane Relief Fund in 1993 to help unprotected Hawaiʻi residents. The fund was never needed for another Hawaiʻi hurricane, and it was stopped in 2000 when insurance companies returned to the island. [46]

It is thought that Hurricane Iniki blew apart many chicken coops, some possibly used to house fighting chickens; this caused a dramatic increase in the numbers of feral chickens roaming Kauaʻi. [47]

Retirement

The name Iniki was retired due to this storm's impacts, and was replaced with Iolana in the Central North Pacific tropical storm list. [48] Less than three days after Iniki struck, Hurricane Orlene struck the Big Island as a tropical depression, hampering relief efforts.

See also

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Hurricane Genevieve, also referred to as Typhoon Genevieve, was the fourth-most intense tropical cyclone of the North Pacific Ocean in 2014. A long-lasting system, Genevieve was the first one to track across all three northern Pacific basins since Hurricane Dora in 1999. Genevieve developed from a tropical wave into the eighth tropical storm of the 2014 Pacific hurricane season well east-southeast of Hawaii on July 25. However, increased vertical wind shear caused it to weaken into a tropical depression by the following day and degenerate into a remnant low on July 28. Late on July 29, the system regenerated into a tropical depression, but it weakened into a remnant low again on July 31, owing to vertical wind shear and dry air.

Hurricane Iselle 2014 tropical cyclone

Hurricane Iselle was the strongest tropical cyclone to make landfall on the Big Island of Hawaii in recorded history. The eleventh named storm of the annual hurricane season, Iselle developed from an area of disturbed weather southwest of Mexico on July 31, 2014. Assuming a west-northwest course that it would maintain throughout its existence, generally favorable atmospheric conditions allowed for gradual strengthening, with the cyclone attaining hurricane status a day after formation. Continued strengthening progressed for several days up until August 4, when Iselle reached peak intensity with maximum sustained winds of 140 mph (220 km/h) and a minimum barometric pressure of 947 mbar, making it a Category 4 hurricane. Thereafter, Iselle encountered hostile environmental conditions and quickly weakened before making landfall on the Big Island on August 8 as a moderate tropical storm. Its passage over the island disrupted the cyclone, and Iselle later dissipated on August 9.

Hurricane Ana

Hurricane Ana was the second tropical cyclone in 2014 to threaten the U.S. state of Hawaii with a direct hit, after Iselle in August. The twenty-first named storm and fifteenth hurricane of the 2014 Pacific hurricane season, Ana formed from a disturbance that formed in the Central Pacific in mid-October. It rapidly consolidated, and a tropical depression developed by October 13. Aided by favorable conditions, Ana gradually strengthened while moving westward, threatening to pass over the island chain of Hawaii once or several times as indicated by early forecasts. By October 17, it had strengthened to a hurricane south of Hawaii and reached its peak intensity shortly afterwards while also making its closest approach. Afterwards, Ana weakened and began to fluctuate in intensity as it turned to the north and eventually northeast as it rounded a subtropical ridge and interacted with a cold front before becoming a hurricane briefly again on October 25. Ana transitioned into an extratropical cyclone on October 26, and raced across the northwest Pacific before dissipating by October 28 after it came ashore in Western Canada.

Hurricane Darby (2016)

Hurricane Darby was a strong tropical cyclone which affected Hawaii as a tropical storm. The fifth named storm of the busy 2016 Pacific hurricane season, Darby originated from a low pressure area that developed in the Eastern Pacific well southwest of Mexico during July 2016. It gained sufficient organization to be declared a tropical depression on July 11, and was upgraded to Tropical Storm Darby the next day. Further intensification ensued, and Darby became a hurricane on July 13. Over the next three days, Darby slowly strengthened to Category 3 status on the Saffir–Simpson scale, becoming a major hurricane. Cool waters and dry air caused Darby to weaken over the next three days, although Darby managed to restrengthen slightly on July 21 before weakening once again as the storm neared Hawaii. Just after midnight on July 24, Darby made landfall on the Big Island, and weakened into a remnant low two days later.

Hurricane Lane (2018) Category 5 hurricane in 2018

Hurricane Lane was the wettest tropical cyclone on record in Hawaii, with rainfall accumulations of 52.02 inches (1,321 mm) in Mountain View. It also ranked as the second-wettest tropical cyclone in the United States, after Hurricane Harvey of 2017. The first Category 5 Pacific hurricane since Patricia in 2015, Lane was the twelfth named storm, sixth hurricane, and fourth major hurricane of the 2018 Pacific hurricane season. It originated from a tropical wave that began producing disorganized thunderstorm activity several hundred miles off the southern coast of Mexico on August 11. Over the next four days, the disturbance gradually strengthened amid favorable atmospheric and thermodynamic conditions and became a tropical depression early on August 15. Twelve hours later, the depression intensified into Tropical Storm Lane. Gradual strengthening occurred for the next day and a half, which resulted in Lane reaching hurricane status by August 17, followed by rapid intensification that brought Lane to its initial peak intensity as a Category 4 hurricane on August 18. On August 19, Lane crossed into the Central Pacific basin, where increased wind shear weakened it. However, on August 20, Lane re-intensified into a Category 4 hurricane, and reached Category 5 intensity early on August 22. As Lane approached the Hawaiian Islands, it began to weaken as vertical wind shear once again increased, dropping below hurricane status on August 25. Over the next few days, Lane began a westwards course away from the Hawaiian Islands as influence from the easterly trade winds increased as Lane weakened. On August 29, Lane became a remnant low, and dissipated shortly afterward.

Hurricane Olivia (2018)

Hurricane Olivia was the first tropical cyclone to make landfall on Maui and Lanai in recorded history. The fifteenth named storm, ninth hurricane, and sixth major hurricane of the 2018 Pacific hurricane season, Olivia formed southwest of Mexico on September 1. The depression slowly organized and strengthened into Tropical Storm Olivia on the next day. Olivia then began a period of rapid intensification on September 3, reaching its initial peak on September 5. Soon after, Olivia began a weakening trend, before re-intensifying on September 6. On the next day, Olivia peaked as a Category 4 hurricane, with winds of 130 mph and a minimum central pressure of 951 mbar. Six hours later, Olivia began another weakening trend that resulted in the hurricane being downgraded to Category 1 status on September 8, east of the 140th meridian west. On September 9, Olivia entered the Central Pacific Basin. Over the next couple of days, Olivia prompted the issuance of Tropical Storm Watches and Warnings for Hawaii County, Oahu, Maui County, and Kauai County. Olivia weakened into a tropical storm on September 11, before making brief landfalls in northwest Maui and Lanai on the next day, becoming the first tropical cyclone to impact the islands in recorded history. Tropical storm-force winds mainly affected Maui County and Oahu. Torrential rains affected the same area from September 11 to 13, causing flash flooding. Olivia caused a total of US$25 million in damages. Olivia was downgraded to a tropical depression on September 13 while continuing to head west. Due to wind shear disrupting Olivia's convection, the system weakened into a remnant low on September 14. Olivia crossed into the West Pacific Basin on September 19 as a remnant low, before dissipating later that day.

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