Typhoon Longwang, known in the Philippines as Typhoon Maring, was the deadliest tropical cyclone to impact China during the 2005 Pacific typhoon season. Longwang was first identified as a tropical depression on September 25 north of the Mariana Islands. Moving along a general westward track, the system quickly intensified and reached typhoon status on September 27. After reaching Category 4-equivalent intensity on the Saffir–Simpson hurricane scale, adverse atmospheric conditions along with internal structural changes resulted in temporary weakening. The structural change culminated in Longwang becoming an annular typhoon and prompted re-intensification. The storm attained peak strength with winds of and a pressure of 930 mbar (hPa; ) on October 1 as it approached Taiwan. Interaction with the mountainous terrain of the island and further structural changes caused some weakening before the typhoon made landfall near Hualien City early on October 2. Crossing the island in six hours, Longwang emerged over the Taiwan Strait before moving onshore again later that day, this time in Fujian Province, China as a minimal typhoon. Once over mainland China, the storm quickly weakened and ultimately dissipated late on October 3.
Prior to the storm's arrival, officials in Taiwan activated all emergency operations centers and urged residents to take serious precautions. The storm brought record-breaking winds, peaking at in Hualien City, and torrential rains. Despite the intensity of the storm, damage was relatively limited there. Two people died, 73 were injured, and damage reached NT$570 million (US$17.7 million). Large-scale evacuations took place in mainland China, with 730,000 people relocating. Losses were extensive in Fujian Province where 1-in-100 year rains caused disastrous flooding in Fuzhou, killing 62 people. In Minhou County, 85 paramilitary police perished when a landslide destroyed their barracks. Throughout China, 147 people were killed and damage amounted to 7.81 billion RMB (US$944.6 million). Due to the severe damage, the name Longwang was later retired and replaced by Haikui.
Meteorological history
On September 24, 2005, the Joint Typhoon Warning Center (JTWC) began monitoring a tropical disturbance north of the Mariana Islands. Convective banding features soon consolidated around a low-pressure area associated with the system, prompting the issuance of a Tropical Cyclone Formation Alert the following day. Later on September 25, the Japan Meteorological Agency (JMA) declared the system a tropical depression. Situated in a region characterized by low wind shear and favorable upper-level divergence, steady intensification ensued. Early on September 26, the JTWC also classified the system as a tropical depression, designating it as 19W. Hours later, both agencies assessed sustained winds to have reached , indicating tropical storm intensity. As such, the JMA named the storm Longwang. Situated to the southwest of a ridge, the storm tracked slowly west-northwest, while strengthening at an increasing rate. A temporary turn northwest occurred on September 26 as Longwang approached a weakness in the ridge which had previously steered it west-northwestward. In the 24 hours following the storm's naming, Longwang quickly intensified into a typhoon. Once at typhoon status, the storm resumed a more westerly track as a second ridge extending from eastern Asia became the dominant steering factor.
On a westerly course toward Taiwan and eastern China, Longwang underwent a period of rapid intensification from September 27–28. At the end of this phase, the JMA assessed peak winds at while the JTWC rated it as a Category 4-equivalent typhoon on the Saffir–Simpson hurricane scale. On September 29, the Philippine Atmospheric, Geophysical and Astronomical Services Administration assigned the typhoon the local name Maring as it entered their area of responsibility. The following day, Longwang underwent a structural change, transitioning from asymmetrical banding to symmetrical, making it an annular tropical cyclone. During the transition, upper-level divergence and outflow significantly decreased, resulting in temporary weakening of the typhoon. Additionally, an increase in westerly wind shear caused the interior structure to become asymmetric, with a southwest to northeast tilt noted by dropsondes released by the Dropwinsonde Observations for Typhoon Surveillance project. Once the transition into an annular cyclone completed, Longwang re-intensified and attained its peak intensity on October 1 while situated south of Okinawa. The JMA assessed winds at along with a barometric pressure of 930 mbar (hPa; ). The JTWC estimated Longwang to have been slightly stronger, with one-minute sustained winds of .
At the time of peak intensity, an unmanned weather reconnaissance vehicle, known as Aerosonde, was flown into the typhoon and recorded peak winds of at an altitude of . As the storm approached Taiwan late on October 1, an eyewall replacement cycle began, with a large secondary eyewall forming around the inner one. At 1848 UTC, Doppler weather radar velocity estimates indicated winds of at an altitude of . An interpolated surface pressure of was obtained based on the Aerosonde's data. After flying in the storm for ten hours, the unmanned vehicle encountered severe turbulence and crashed about east of Taitung City. Interaction with the mountainous terrain of Taiwan caused Longwang to weaken somewhat. The system ultimately made landfall near Hualien City at 0500 UTC on October 2. Just six hours after moving inland, Longwang emerged over the Taiwan Strait with its circulation mostly intact; however, weakening continued as it approached eastern China. Remaining over water for less than 12 hours, the typhoon made its second and ultimate landfall in Fujian Province around 1800 UTC on October 2 (0200 October 3 local time). The storm quickly degraded over the following day, with winds decreasing below gale-force within 12 hours. The former typhoon slowed and turned northward over western Fujian before dissipating late on October 3.
Preparations
The first indications of Longwang impacting Taiwan were on September 27, when the Central Weather Bureau (CWB) stated the storm was on a westerly course to the island. On September 30, the CWB issued a sea warning for areas surrounding Taiwan. Shortly after, the island's Central Emergency Operations Center was activated. Early on October 1, the whole of Taiwan was placed under a storm warning, prompting the Emergency Center to go to its maximum alert level. Daily meetings held by the Emergency Center provided officials with information on the storm and its expected impacts. Details from the meetings prompted the activation of all emergency operation centers in Taiwan. Nine counties were placed under debris flow advisories by the end of October 1.
On October 2, then-President Chen Shui-bian urged all residents to take serious precautions. 2,280 mountain climbers were advised to leave, the majority of whom complied. The Taiwan Railway Administration suspended operations on four rail lines. Rapid transit lines in Taipei maintained operations, though ran on slower schedules. For southern Taiwan, the main risk was fresh water flooding. Fifteen rivers were placed under high alert while 340 more were under moderate alert.
By the time Longwang made landfall, 37 shelters opened across the island, accommodating nearly 1,000 people. Additionally, 5,464 Chinese fishermen temporarily sheltered at Taiwanese ports. All airports were closed on October 2 and sea travel was suspended. With international airports shut down, President Chen, who was returning from a visit to the United Arab Emirates, was forced to land in Indonesia. The landing in Indonesia was seen as a political breakthrough for Taiwan as Indonesia does not recognize them as a separate nation from China.
By October 1, officials in mainland China issued warnings for Fujian Province and urged residents to evacuate. An estimated 537,000 people heeded these warnings in Fujian and a further 86,000 and 61,860 evacuated in Zhejiang and Guangdong provinces, respectively. The majority of evacuees were from the cities of Ningde, Fuzhou, Putian, Quanzhou, Xiamen, and Zhangzhou, with 376,000 evacuating from Xiamen alone. Along the coast, roughly 38,000 seagoing vessels returned to port. Thousands of officials in the province oversaw flood preparations. Public transportation across Fujian Province was temporarily suspended as well. The airport in Xiamen shut down late on October 2 as rain bands from the storm began impacting the area. Throughout Fujian, more than 120 flights were canceled.
Impact
+ Impact by Region Region Fatalities Injuries LossesChina147>39US$944.6 millionJapan04US$88,000Philippines00NoneTaiwan373>US$17.2 millionTotals149>116~US$962.68 million On October 1, Typhoon Longwang brushed the southern Ryukyu Islands of Japan. Wind gusts in excess of battered the islands of Ishigaki, Iriomote, and Yonaguni; a peak gust of was measured on Ishigaki. These winds caused travel disruptions, minor damage, and scattered power outages. Four people sustained minor injuries in Ishigaki City after being knocked down by the winds. Heavy rains accompanied the winds and accumulations peaked at in the Yaeyama District. Significant agricultural damage took place as well, with losses in the sector reaching ¥10 million (US$88,000). Farther south, the Batanes Islands of the Philippines experienced winds of in relation to the typhoon.
Due to the substantial loss of life and damage, the name Longwang was retired and replaced with Haikui () in 2006. The name was first used in the 2012 Pacific typhoon season.
Taiwan
Striking Taiwan as a powerful storm early on October 2, Longwang brought destructive winds to many areas along the island's east coast. Hualien City experienced the brunt of the impact with sustained winds reaching and gusts up to . These gusts were the highest ever recorded in the city, surpassing the previous record set during Typhoon Louise in 1959. On the west coast of Taiwan, gusts reached in Wugi. Torrential rains impacted many areas, with a peak 24 hour accumulations in Hualien County reaching . A one-day total of was also measured in Yilan County.
At the storm's height, 749,621 households lost power while 24,817 lost telephone service. In Hualien County, a man was killed after being struck in the head by an iron bar that crashed into his home; 33 others were injured in the county. At least one home collapsed and six others were damaged in the county. High waves broke a stretch of a levee near ChiAnn, a coastal community in Hualien, and flooded nearby homes. Part of the entrance to the Hualien Martyrs Shrine collapsed amid strong winds. Billboards and trees fell across Hualien City, littering the streets with debris. Elsewhere on the island, 13 others sustained injuries and one person was reported missing. In Chiayi City, a bus and truck collided, injuring 16 and on Provincial Highway 16, 11 people were injured when their coach bus crashed into a telephone pole. It is unknown how much, if any, of a role the typhoon was in these accidents. In Kaohsiung, a concrete slab was torn off a building and wedged into a high rise apartment. One woman died after being swept away by flash flooding in the central town of Hoping. Within the Alishan National Scenic Area 106 landslides occurred, covering an area of . Along the coast, a 7,000 ton cargo vessel broke loose from its mooring and drifted for before running aground and breaking apart.