Typhoon Haikui (2023)

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Map key
Saffir–Simpson scale
  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

While Typhoon Saola was exhibiting a counterclockwise loop east of the Philippines, a new low-pressure area developed into a tropical depression on August 27 near the Northern Mariana Islands. The depression, which was slowly drifting westward, was subsequently upgraded by the JMA into a tropical storm on August 28, naming it Haikui. The JTWC began initiating advisories thereafter and was designated as 10W. Haikui then rapidly strengthened into the severe tropical storm category a few minutes later. Haikui then moved west-northwest and eventually entered the Philippine area of responsibility at around 21:00 PHT (13:00 UTC) and was promptly assigned the domestic name Hanna.

Haikui then maintained its severe tropical storm status for about a day while moving generally westwards across the Philippine Sea, before finally reaching typhoon status on September 1. Haikui then continued westwards over the Philippine Sea with little change in intensity, but later intensified into a Category 2-equivalent typhoon a day later. Haikui later rapidly strengthened into a strong Category 3 typhoon before making landfall over Taitung County, Taiwan, becoming the first storm to hit mainland Taiwan for the first time in 4 years after Severe Tropical Storm Bailu (Ineng), and the first Category 3+ typhoon to hit the island since Typhoon Megi (Helen) in 2016. [1] The collision between Typhoon Haikui & the mountain ranges of Taiwan considerably wrecked the structure of the storm and made it weaken back into a minimal Category 1 typhoon by the time it exited the landmass of the island in the evening. Haikui then moved erratically over the next few hours, heading eastwards and making a second landfall in Kaohsiung, Taiwan. [2] On September 5, Typhoon Haikui made its third and final landfall along the coast of Dongshan County, Fujian as a weakening tropical storm. [3]

Preparations and impact

Philippines

Though not making any direct landfall in the Philippines, Typhoon Haikui (locally known as Hanna) enhanced the southwest monsoon along with Typhoon Saola and Tropical Storm Kirogi, causing heavy rainfall and strong winds in many areas especially in Luzon, and causing one death. [4] Classes were suspended in some regions including Metro Manila on September 1 in the wake of the three storms that bring heavy rains and gusty winds throughout the country. [5]

Taiwan

Typhoon Haikui developing off the eastern coast of Taiwan right before its landfall on September 3. Haikui 2023-09-02 2330Z - 2023-09-03 0740Z.gif
Typhoon Haikui developing off the eastern coast of Taiwan right before its landfall on September 3.

Before the arrival of the typhoon, 8,000 people were evacuated from the island, particularly also from the mountainous regions that are prone to landslides. [6]

As Haikui made landfall in Taiwan, it unleashed torrential rains and very strong gusty winds. It left 110,000 of households without power. [7] Two people were slightly injured after a tree fell on a truck in Hualien. Although no deaths were reported, parts of the country experience floods, downed trees, and continued rainfall after Haikui made a second landfall. More than 217,000 households lost electricity in line with the typhoon. [8]

Mainland China

On September 5, Typhoon Haikui made landfall along the coast of Dongshan County, Fujian. [9] A heavy rainstorm occurred in the coastal areas of Fujian, [10] causing the death of two firefighters. Economic losses in Fujian amounted to ¥5 billion (US$683 million). [11]

Land and sea transportation in Guangdong and Huizhou had been suspended due to widespread floods and typhoon prevention. Classes had also been suspended in the cities of Shantou and Chaozhou. [12]

Hong Kong

Typhoon Haikui (Hanna)
Haikui 2023-09-03 0300Z.jpg
Typhoon Haikui at peak intensity, prior to landfall Taiwan on September 3
IBTrACS
Wettest tropical cyclones and their remnants Hong Kong
Highest-known totals
PrecipitationStormLocationRef.
Rankmmin
1632.024.90 Haikui 2023 Hong Kong Observatory [13]
2616.524.27 Sam 1999 Hong Kong Observatory [13]
3597.023.50July 1926 TyphoonRoyal Observatory, Hong Kong [13]
4562.022.13June 1916 TyphoonRoyal Observatory, Hong Kong [13]
5530.720.89 Agnes 1965 Royal Observatory, Hong Kong [13]
6519.020.43 Agnes 1978 Royal Observatory, Hong Kong [13]
7516.120.32 Ellen 1976 Royal Observatory, Hong Kong [13]
8497.519.59 Dot 1993 Royal Observatory, Hong Kong [13]
9491.719.36 Dot 1982 Royal Observatory, Hong Kong [13]
10480.918.93 Helen 1995 Royal Observatory, Hong Kong [13]

A low-pressure system associated with Haikui caused flooding in Hong Kong from September 7 to September 8. On September 7, Sha Tau Kok in the North District had already recorded more than 70 millimetres (2.8 in) rainfall by 7 pm, which the Hong Kong Observatory issued a flood warning for Northern New Territories at 7:50 pm. [14] Heavy rainfall then spread to the entirety of the city, and the weather bureau issued the Amber rainstorm signal, which was then upgraded to the Red signal in less than half an hour. At 11:05 pm, the highest warning level, Black rainstorm signal, was issued due to continued worsening situations. It was the first time the warning was issued in two years. [15] It caused three fatalities.

The torrential rainfall continued overnight and into the morning of 8 September, gradually subsiding by afternoon. The Black Rainstorm signal lasted over 16 hours, the longest duration ever since the rainstorm warning system was implemented in 1992. The HKO headquarters accumulated over 632 millimetres (24.9 in) of rainfall within 24 hours, a 24-hour rainfall rate trailing only the record set in May 1889. This also makes Typhoon Haikui the wettest storm in Hong Kong's history, breaking the record of Severe Tropical Storm Sam in 1999. Meanwhile, parts of Hong Kong Island, including Stanley, Chai Wan, Shau Kei Wan and North Point accumulated over 800 millimetres (31 in) of rainfall within just 12 hours, the area around Tai Tam even accumulated over 900 millimetres (35 in). [16]

Retirement

Due to heavy damage in China and Taiwan, the Typhoon Committee announced that the name Haikui, along with two others, will be removed from the naming lists and will never be used again as a typhoon name. [17] Its replacement name will be announced in spring 2025.

See also

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References

  1. ↑ Presse, AFP-Agence France. "Typhoon Haikui Makes Landfall In Taiwan: Central Weather Bureau". www.barrons.com. Retrieved 2023-09-03.
  2. ↑ Argosino, Faith (2023-09-04). "Hanna makes another landfall in Taiwan's Kaohsiung City; Signal No. 1 stays over Batanes". INQUIRER.net. Retrieved 2023-09-04.
  3. ↑ Zhang Huaying (2023-09-05). "台风"海葵"登陆福建东山". Xinhua net (in Chinese (China)). Retrieved 2023-09-05.
  4. ↑ "One reported dead due to 'Goring,' 'Hanna' effects". CNN Philippines. September 1, 2023. Archived from the original on 2023-09-12. Retrieved 2023-09-02.
  5. ↑ "#WalangPasok: Class suspensions, Friday, September 1, 2023". Rappler. September 1, 2023. Retrieved 2023-08-31.
  6. ↑ "Storm Haikui heads to China after double landfall in Taiwan". Phys.org. September 4, 2023. Retrieved September 4, 2023.
  7. ↑ "Typhoon Haikui makes landfall in Taiwan". CNA. September 3, 2023. Retrieved September 3, 2023.
  8. ↑ "As Typhoon Haikui barrels into Taiwan, thousands are evacuated". Reuters. September 4, 2023. Retrieved September 4, 2023.
  9. ↑ Zhang Huaying (2023-09-05). "台风"海葵"登陆福建东山". Xinhua net (in Chinese (China)). Retrieved 2023-09-07.
  10. ↑ ""海葵"台风给多地带来强降水 今天福建仍有暴雨到大暴雨". Fujian Provincial Meteorological Bureau (in Chinese (China)). 2023-09-05. Retrieved 2023-09-07.
  11. ↑ "福州消防车颱风出勤遇山洪冲走 寻获8人已2死、另1人失踪 - 两岸". China Times (in Chinese). 2023-09-05. Retrieved 2023-09-07.
  12. ↑ "Typhoon Haikui makes landfall in East, South China". China Daily. 2023-09-05. Retrieved 2023-09-05.
  13. 1 2 3 4 5 6 7 8 9 10 Tropical Cyclones in 2010 (PDF) (Report). Hong Kong Observatory. p. 98. Retrieved 2012-05-14.
  14. ↑ "黑雨警告現正生效 同時發出山泥傾瀉警告". on.cc東網 (in Chinese (Hong Kong)). 7 September 2023. Retrieved 9 September 2023.
  15. ↑ Mok, Danny; Kong, Harvey; Tsand, Denise (7 September 2023). "132 Hongkongers sent to hospitals, all rainstorm alerts cancelled after deluge". South China Morning Post. Retrieved 9 September 2023.
  16. ↑ "Hong Kong Weather Station Observations Database". ilens.hk. Retrieved 2023-09-10.
  17. ↑ 56th ESCAP/WMO Typhoon Committee Session Report (PDF) (Report). ESCAP/WMO Typhoon Committee. p. 4. Retrieved August 21, 2024.
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