Typhoon Yutu

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Map key
  Tropical depression (≤38 mph, ≤62 km/h)
  Tropical storm (39–73 mph, 63–118 km/h)
  Category 1 (74–95 mph, 119–153 km/h)
  Category 2 (96–110 mph, 154–177 km/h)
  Category 3 (111–129 mph, 178–208 km/h)
  Category 4 (130–156 mph, 209–251 km/h)
  Category 5 (≥157 mph, ≥252 km/h)
  Unknown
Storm type
Disc Plain black.svg Tropical cyclone
Solid black.svg Subtropical cyclone
ArrowUp.svg Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression

Early on October 21, 2018, a tropical depression developed to the east of Guam and the Northern Mariana Islands, with the JMA initiating advisories on the system. Shortly afterward, the JTWC assigned the storm the identifier 31W. [3] The system began to strengthen, becoming a tropical storm several hours later, and the JMA assigned the name Yutu to the storm. [4] Favorable conditions, including low wind shear and high ocean-surface temperatures, allowed Yutu to explosively intensify on the following day, with the storm reaching severe tropical storm strength and then typhoon intensity a few hours later. From October 23 to 24, Yutu continued to organize and explosively intensify, reaching Category 5 super typhoon intensity on October 24. The typhoon continued to strengthen and displayed a healthy convective structure, while moving towards the island of Saipan. [3]

Around 2:00 a.m. local time on October 25, Typhoon Yutu made landfall on Tinian and the southern part of Saipan at peak intensity, [5] [6] as a Category 5-equivalent super typhoon, with a minimum central pressure of 900 millibars (27 inHg) and 1-minute sustained winds of 280 km/h (175 mph), becoming the most powerful storm on record to impact the Northern Mariana Islands. [7] [8] On October 25, the system underwent an eyewall replacement cycle, causing it to weaken into a Category 4 super typhoon as it continued moving westwards. On the next day, Yutu completed its eyewall replacement cycle, and the system regained Category 5 intensity at 12:00 UTC that day. [9] On October 27, Yutu resumed weakening, and weakened into a Category 4 super typhoon. On the same day, Yutu entered PAGASA's Philippine Area of Responsibility (or PAR), and was named Rosita. Yutu continued to weaken while progressing westward, after encountering more unfavorable conditions, including lower sea surface temperatures, and the storm weakened to a Category 3-equivalent typhoon on October 28. At around 21:00 UTC on October 29, Yutu made landfall as a Category 2-equivalent typhoon on the Philippine province of Isabela, on the island of Luzon. [10]

As Yutu entered the South China Sea, it was exposed to the cold and dry air of the northeastern monsoon from China and further weakened into a tropical depression. Late on November 1, Yutu turned towards the south-southwest while rapidly weakening, due to wind shear. On November 2, Yutu degenerated into a remnant low without making another landfall, before dissipating early on the next day. [3]

Preparations

Northern Mariana Islands

In the month prior to Yutu, Typhoon Mangkhut struck the Mariana Islands, prompting emergency officials to stockpile supplies. With relief supplies largely unused, storage facilities on Guam had 220,000 liters of water and 260,000 meals readily available. [11] Federal Emergency Management Agency (FEMA) personnel deployed to both Tinian and Saipan ahead of the storm. U.S. President Donald Trump declared an emergency for the Northern Islands on October 24. [12]

Philippines

On October 25, PAGASA began issuing severe weather bulletins in anticipation of Typhoon Yutu entering the Philippine Area of Responsibility. [13] The agency subsequently raised Public Storm Warning Signal (PSWS) No. 1 for the majority of Luzon north of Metro Manila on October 28. [14] Following a slightly more southerly track than initially anticipated, PSWS No. 1 later extended to Quezon. PSWS No. 3, indicating winds of 121–170 km/h (75–106 mph) were anticipated, was raised for Benguet, Ifugao, Ilocos Sur, Isabela, La Union, Mountain Province, Nueva Vizcaya, Pangasinan, Quirino, and northern Aurora provinces on October 29. Furthermore, PSWS No. 2, indicating tropical storm-force winds, covered large swaths of northern Luzon. [15] [16] [17]

More than 10,000 people, still reeling from the devastating effects of Typhoon Mangkhut in September, evacuated the mountainous areas in northern provinces of Luzon. [18]

Highest Public Storm Warning Signal

Typhoon Yutu (Rosita)
Yutu 2018-10-25 0000Z.jpg
Yutu at peak intensity west of the Northern Mariana Islands on October 25
PSWS#LuzonVisayasMindanao
3Isabela, Quirino, Northern Portion of Aurora, Nueva Vizcaya, Ifugao, Benguet, La Union, Ilocos Sur, Mt. Province, PangasinanNoneNone
2Cagayan, Ilocos Norte, Apayao, Abra, Kalinga, Tarlac, Nueva Ecija, Northern Portion of Quezon including Polillo Island, Rest of Aurora, Zambales, Pampanga, BulacanNoneNone
1Metro Manila, Batanes, Babuyan Islands, Rizal, Laguna, Batangas, Bataan, Cavite, Camarines NorteNoneNone

Hong Kong

On November 1, Hong Kong Observatory issued the Strong Wind Signal No. 3, the first time Strong Wind Signal No. 3 has been issued in November since Typhoon Ira in 1993. [19]

Impact

Northern Mariana Islands

Strongest U.S. landfalling tropical cyclones
RankName‡SeasonWind speed
mphkm/h
1 "Labor Day" 1935 185295
2 Karen 1962 175280
Camille 1969
Yutu 2018
5 Andrew 1992 165270
6 "Okeechobee" 1928 160260
Michael 2018
8 Maria 2017 155250
9 "Last Island" 1856 150240
"Indianola" 1886
"Florida Keys" 1919
"Freeport" 1932
Charley 2004
Laura 2020
Ida 2021
Ian 2022
Source: Hurricane Research Division [20]
†Strength refers to maximum sustained wind speed upon striking land.
‡Systems prior to 1950 were not officially named.
A seabee sailor removing debris in Tinian following Typhoon Yutu A Seabee removes debris from a road during recovery. (44751228255).jpg
A seabee sailor removing debris in Tinian following Typhoon Yutu
Relief efforts after Typhoon Yutu Guam National Guard, Navy join forces for relief efforts (2).jpg
Relief efforts after Typhoon Yutu

Striking Tinian and Saipan on October 24 as a Category 5-equivalent super typhoon, Yutu became the strongest tropical cyclone to ever impact the Mariana Islands and the second-strongest to strike the United States or its territories as a whole, tied with Typhoon Karen in 1962 and Hurricane Camille in 1969. [21] [22] Only the 1935 Labor Day hurricane impacted the country at a greater strength. [12] Saipan International Airport recorded wind gusts of 103 mph (166 km/h). [8] Yutu's eyewall also knocked out Saipan's doppler radar on October 25, during the storm's landfall. [8]

On Saipan, the typhoon killed two people; a woman when it wrecked the building she was staying in, [23] and another woman who died of carbon monoxide poisoning caused by inhaling the fumes of a generator. [24] At least 133 other people were left injured, three of whom were injured severely. [23] The entirety of both islands were left without electricity. The majority of buildings in southern Saipan lost their roofs or were destroyed, including Hopwood Middle School, which suffered extensive damage. [23] Low-lying vegetation in southern parts of the island were shredded or ripped from the ground. [11] Saipan International Airport sustained significant damage; terminals flooded and navigation aids were rendered inoperable. [25]

The majority of homes on Tinian were severely damaged or destroyed. Some concrete structures sustained significant damage, with a few completely destroyed, and residents reported that those buildings shook during the typhoon. Storm shutters were torn from windows, leaving the interior of structures exposed to wind and water damage. In one instance, a door was ripped from a building and hurled 30 m (100 ft) into a pigsty. [11] The island's only health center sustained major damage; however, no patients were being treated at the time. [12] Tinian International Airport suffered significant damage. [25] Total damage estimated by FEMA reached $800 million. [26]

Meteorologist Brandon Aydlett at the National Weather Service described the typhoon as "the storm which sets the scale for which future storms are compared to". [11]

Philippines

Infrared satellite loop of Typhoon Yutu making landfall over Luzon on October 29 TY Rosita made Philippines landfall.gif
Infrared satellite loop of Typhoon Yutu making landfall over Luzon on October 29

Striking Luzon on October 30, Typhoon Yutu, which was known in the Philippines as Typhoon “Rosita”, produced torrential rain across the mountainous region. Numerous landslides caused significant damage, engulfing homes and blocking roads. Yutu killed a total of 27 people in the Philippines. [1] Five people died after landslides occurred in Banaue and Lubuagan, while flooding claimed one life in Perez. A landslide in Natonin buried a government building, leaving 14 dead. [27] Significant effects were felt in Benguet, La Union, and Nueva Vizcaya, where more than 100 people died during Typhoon Mangkhut in September. [18] As of November 8, 2018, agricultural damage were counted to be 2.9 billion (US$54.1 million). [27]

Hong Kong

On October 31, a 25-year-old man died when surfing in Big Wave Bay, Hong Kong Island, due to high surf, while the standby typhoon signal No. 1 was hoisted. [2]

Aftermath

Guam Army National Guard prepared for the relief efforts of Typhoon Yutu Typhoon Yutu Relief Efforts (43982601270).jpg
Guam Army National Guard prepared for the relief efforts of Typhoon Yutu

Before the typhoon's impact, Governor Ralph Torres requested for a presidential emergency declaration in anticipation of the typhoon's projected devastation. U.S. President Donald J. Trump approved his request on October 23, 2018. Immediately after the typhoon's impact, Governor Torres requested for a presidential disaster declaration, which was approved on October 26 by President Trump. Immediately following the typhoon's impact, the Congressional Delegate for the Northern Mariana Islands, Gregorio Sablan, made a request for aid. With the scale of destruction far exceeding Typhoon Soudelor in 2015, power was not expected to be fully restored for months. President Trump signed a major disaster declaration on October 26, enabling the islands to receive federal funding. [28]

Daytime operations at Saipan International Airport resumed by October 27; however, damaged navigation equipment prevented safe operation during the night. The Coast Guard reopened the port of Saipan on October 27, allowing vessels to travel in and out of it. FEMA and the Red Cross established five relief distribution sites on the island which began operations on October 28. [29]

Response efforts

Communication tower damaged by typhoon winds TowerDamageTinianAfterYutu.jpg
Communication tower damaged by typhoon winds

FEMA scheduled aircraft to deliver relief supplies by October 26. In accordance with changes implemented after Hurricane Maria in 2017, the agency established specific task forces to handle smaller scale facets of the recovery: transportation, communications, food and water, and energy and fuel. [11]

Emergency shelters quickly filled to capacity on both islands by October 25. The same day the U.S. Department of Health and Human Services declared a public health emergency for the affected areas and deployed 50 health personnel. [12] [28] The USCGC Sequoia and USCGC Kiska ported in Guam sailed for Saipan and Tinian, respectively, with relief supplies. [28]

Direct Relief worked with Commonwealth Healthcare Corporation and with other health facilities damaged by the storm to coordinate medical aid shipments to the Northern Mariana Islands. A shipment of 40,000 liters of drinking water along with other essential items was delivered in late October. [30]

On October 26, Matson, Inc. provided $125,000 in funds and deployed its vessel Mana loaded with bottled water and ice. [28]

On October 27, South Korea began airlifting approximately 1,000 stranded tourists from Saipan. [28]

Retirement

Due to the severe damage in the Northern Mariana Islands, the name Yutu was retired during the 52nd annual session of the ESCAP/WMO Typhoon Committee in February 2020. In February 2021, the Typhoon Committee subsequently chose Yinxing as its replacement name. [31]

In addition, PAGASA officially retired the name Rosita from the rotating lists of tropical cyclone names after the typhoon caused over ₱1 billion in damage on its onslaught in the country, and it will never be used again as a typhoon name within the Philippine Area of Responsibility (PAR), despite this being the first time the name was used in the PAGASA Naming List. It was replaced with Rosal, which was used for the first time in 2022. [32]

See also

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