The 2004 Pacific typhoon season was an extremely active season that featured the second-highest ACE ever recorded in a single season, second only to 1997, which featured 29 named storms, nineteen typhoons, and six super typhoons. It was an event in the annual cycle of tropical cyclone formation, in which tropical cyclones form in the western Pacific Ocean. The season ran throughout 2004, though most tropical cyclones typically develop between May and October. The season's first named storm and also the first typhoon, Sudal, developed on April 4, later was reached typhoon status two days later, and became the first super typhoon of the year three days later. The season's last named storm, Noru, dissipated on December 22.
The 2003 Pacific typhoon season was a slightly below average yearlong period of tropical cyclogenesis exhibiting the development of 45 tropical depressions, of which 21 became named storms; of those, 14 became typhoons. Though every month with the exception of February and March featured tropical activity, most storms developed from May through October. During the season, tropical cyclones affected the Philippines, Japan, China, the Korean Peninsula, Indochina, and various islands in the western Pacific.
The 1999 Pacific typhoon season was the last Pacific typhoon season to use English names as storm names. It also featured the lowest number of typhoons on record, with only five reaching this intensity. This was mainly due to a strong La Niña which persisted from last year. It also featured the least amount of ACE produced on record. The season was also below-average in named storms, with only 20 of such spawning. This season also featured multiple landfalls in Hong Kong. It had no official bounds; it ran year-round in 1999, but most tropical cyclones tend to form in the northwestern Pacific Ocean between May and November. These dates conventionally delimit the period of each year when most tropical cyclones form in the northwestern Pacific Ocean. The first named storm, Hilda, developed on January 6, while the last named storm, Gloria, dissipated on November 16.
Typhoon Imbudo, known in the Philippines as Super Typhoon Harurot, was a powerful typhoon that struck the Philippines and southern China in July 2003. The seventh named storm and fourth typhoon of the season, Imbudo formed on July 15 to the east of the Philippines. The storm moved generally west-northward for much of its duration due to a ridge to the north. Favorable conditions allowed Imbudo to intensify, gradually at first before undergoing rapid deepening on July 19. After reaching typhoon status, Imbudo strengthened further to peak 10–minute sustained winds of 165 km/h (103 mph) on July 20. The typhoon made landfall on northern Luzon near peak intensity on July 22, but quickly weakened over land. Once in the South China Sea, Imbudo re-intensified slightly before making its final landfall in southern China near Yangjiang on July 24, dissipating the next day.
Typhoon Ewiniar, known in the Philippines as Typhoon Ester, was the third named storm of the 2006 Pacific typhoon season and one that lasted for twelve days as a tropical cyclone, moving on a generally northward track. During its lifespan, it affected Palau, Yap, eastern China, the Ryūkyū Islands of Japan, South Korea as well as North Korea, briefly threatening to make landfall in North Korea before doing so in South Korea. Ewiniar is responsible for at least 181 deaths. However, an unofficial report stated that up to 10,000 people had been killed by flooding in North Korea, with 4,000 people missing.
Typhoon Kent, known in the Philippines as Typhoon Gening, was a powerful Category 4-equivalent typhoon that formed in late August during the 1995 Pacific typhoon season.
Typhoon Soudelor, known in the Philippines as Typhoon Egay, was a powerful typhoon that underwent rapid deepening east of Taiwan in the 2003 Pacific typhoon season. It was the sixth named storm by the Japan Meteorological Agency (JMA) of the season, as well as the third typhoon. It formed on June 12 from a disturbance in the monsoon trough, located east of the Philippines. The system moved generally to the northwest after its genesis, gradually intensifying into a tropical storm. While offshore the Philippines, Soudelor dropped heavy rainfall that caused flooding and left thousands homeless. The storm caused $2.46 million in damage, and 12 deaths.
Typhoon Maria was a minimal typhoon which brushed the southeastern coast of Japan during early August 2006. The seventh named storm of the 2006 Pacific typhoon season, Maria formed out of a tropical depression over the open waters of the western Pacific Ocean. On August 5, the Japan Meteorological Agency (JMA) classified the depression as a tropical storm while the Joint Typhoon Warning Center (JTWC) kept it as a depression. The storm quickly strengthened into a typhoon the next day, reaching its peak intensity with winds of 130 km/h early on August 6. The storm gradually weakened as it began to recurve, causing it to parallel the southeastern coast of Japan. On August 9, Maria weakened into a tropical depression and later into an extratropical cyclone before dissipating on August 15. Maria had only minor effects in Japan, mainly heavy rains which were estimated to have peaked over 400 mm (15.7 in) on the Izu Peninsula. One person was killed after being struck by lightning and six others were injured.
Typhoon Conson, known in the Philippines as Typhoon Frank, was the first of the record ten typhoons to impact Japan during the 2004 Pacific typhoon season. Developing out of a tropical depression near the northern Philippines in early June, Conson slowly traveled towards the north. Gradually strengthening, the storm reached typhoon status late on June 7 according to the Joint Typhoon Warning Center and several hours later according to the Japan Meteorological Agency. After turning towards the northeast, the typhoon brushed Taiwan and reached its peak intensity with 10-minute sustained winds of 150 km/h (90 mph) on June 9. After reaching its peak, Conson gradually weakened, passing through Okinawa before being downgraded to a tropical storm the next day. On June 11, the storm made landfall as a minimal tropical storm in the Kōchi Prefecture just before becoming extratropical. The extratropical remnants continued towards the northeast and were last mentioned on June 14 crossing the International Date Line.
Typhoon Sudal, known in the Philippines as Typhoon Cosme, was the strongest typhoon to strike the island of Yap in the Federated States of Micronesia (FSM) in about 50 years. Yap is one of the four administrative divisions of the FSM. The entire island, only 17 km (11 mi) in length, experienced typhoon force winds, and 90% of the structures were damaged or destroyed. Damage was most severe in southeastern Yap, where the eyewall struck and winds exceeded 185 km/h (115 mph), but the center of the typhoon passed south of the island.
Typhoon Forrest, known in the Philippines as Typhoon Ising, was the fastest-deepening tropical cyclone on record, with its minimum barometric pressure dropping 100 mbar (3.0 inHg) from September 22 to September 23, in less than a day. Forrest formed from a tropical disturbance far from land in the western Pacific Ocean. On September 20, the system was classified as a tropical storm, and thereafter began to intensify. The next day, Forrest reached typhoon status, and the intensification process accelerated. The storm prudently strengthened on September 22, and the following morning, attained peak intensity following a pressure drop of 100 mbar (3.0 inHg) in slightly less than 24 hours. Thereafter, Forrest began to weaken slowly as it moved northwest. Approaching Japan, Super Typhoon Forrest first hit Okinawa on September 27. Nearby, a tornado hit Inza Island, destroying 26 homes and injuring 26 people. Forrest then moved north, impaling the Japanese archipelago before transitioning into an extratropical cyclone on September 28, before eventually dissipating on October 4. The torrential rainfall caused by the typhoon triggered deadly landslides and flooding across Japan. In all, the typhoon killed at least 21 people, left 17 listed as missing, and injured 86. Forrest flooded 46,000 homes in muddy water, over 100 dwellings were destroyed, and 2,560 people were rendered as homeless. Seven flights were called off and 27,000 people were stranded. In addition, 67 bridges and 818 roads were damaged.
Typhoon Mitag, known in the Philippines as Typhoon Basyang, was the first super typhoon on record in the month of March. The second storm of the 2002 Pacific typhoon season, Mitag developed from a trough near the equator on February 25 near the Federated States of Micronesia (FSM). It moved westward through the archipelago and intensified into a typhoon before passing near Yap on March 2. High winds and heavy rainfall affected the state, resulting in an islandwide power outage and destroying hundreds of houses. Mitag caused severe crop damage that resulted in food shortages. The rainfall and storm surge flooded much of the coastline as well as Yap's capital, Colonia. Damage totaled $150 million, mostly from crop damage. There was one death related to the storm's aftermath.
Typhoon Rammasun, known in the Philippines as Typhoon Florita, was the first of four typhoons to contribute to heavy rainfall and deadly flooding in the Philippines in July 2002. The fifth tropical cyclone of the 2002 Pacific typhoon season, Rammasun developed around the same time as Typhoon Chataan, only further to the west. The storm tracked northwestward toward Taiwan, and on July 2 it attained its peak intensity with winds of 155 km/h (96 mph). Rammasun turned northward, passing east of Taiwan and China. In Taiwan, the outer rainbands dropped rainfall that alleviated drought conditions. In China, the rainfall occurred after previously wet conditions, resulting in additional flooding, although damage was less than expected; there was about $85 million in crop and fishery damage in one province.
Typhoon Halong, known in the Philippines as Typhoon Inday, passed just south of Guam one week after Typhoon Chataan struck the island and left heavy damage. The seventh named storm of the season, Halong developed near the same location as Chataan on July 5 near the Marshall Islands. For much of its duration, the storm moved toward the northwest, gradually intensifying. Early on July 10, Halong passed just south of Guam as a tropical storm, producing high waves and gusty winds on the island. The storm disrupted relief efforts from Chataan, causing additional power outages but little damage.
Typhoon Lupit, known in the Philippines as Super Typhoon Yoyoy, destroyed the food supply in several small islands in Yap State in the Federated States of Micronesia (FSM). It formed on November 18, 2003, from the monsoon trough to the west of the Marshall Islands. Early in its duration, it moved generally to the west or west-southwest. On November 21, the depression intensified into Tropical Storm Lupit, the 21st storm named by the Japan Meteorological Agency of the 2003 Pacific typhoon season. Two days later, it strengthened into a typhoon and developed an eye. Lupit later began a prolonged movement to the northwest, during which it passed near several islands in Yap State. The typhoon reached peak intensity on November 26, with peak 10-minute sustained winds of 185 km/h (115 mph). It later weakened due to increasing wind shear and drier air, and after recurving to the northeast, Lupit became extratropical south of Japan on December 2.
Typhoon Etau, known in the Philippines as Typhoon Kabayan, produced near-record winds and rainfall in Japan in August 2003. The tenth named storm and fifth typhoon of the 2003 Pacific typhoon season, Etau developed on August 2, and gradually intensified while moving to the northwest. Etau formed an eye and became a large storm by the time it approached Okinawa on August 7. The typhoon attained peak winds of 155 km/h (96 mph) before weakening slightly while turning to the northeast. Etau made landfall on the Japanese island of Shikoku on August 8, and later moved across portions of Honshu and Hokkaido. After weakening to tropical storm status, the cyclone became extratropical on August 9 and dissipated three days later.
Typhoon Noul, known in the Philippines as Super Typhoon Dodong, was a relatively small but powerful tropical cyclone that affected several areas but caused minor damage. The sixth named storm and third typhoon of the annual typhoon season, Noul formed as a tropical depression over the eastern Caroline Islands on May 2, 2015. It moved generally to the west and west-northwest, gradually intensifying into a tropical storm and later typhoon. On May 9, Noul began rapid deepening as it developed a well-defined eye. Early the next day, the Japan Meteorological Agency (JMA) estimated peak 10 minute sustained winds of 205 km/h (125 mph), while the American-based Joint Typhoon Warning Center (JTWC) estimated peak 1 minute winds of 260 km/h (160 mph), equivalent to Category 5 on the Saffir–Simpson hurricane wind scale. Noul struck northeastern Luzon in the Philippines at that intensity and greatly weakened. After passing east of Taiwan, the typhoon accelerated to the northeast and weakened due to unfavorable conditions. On May 12, Noul became extratropical south of Japan, and the remnants continued to the northeast for several days, dissipating on May 16.
Typhoon Songda, known in the Philippines as Typhoon Nina, was the sixth-costliest typhoon on record. The 18th named storm of the 2004 Pacific typhoon season, Songda developed on August 26 near the Marshall Islands. Following a path that Typhoon Chaba took nine days prior, Songda moved west-northwestward and strengthened quickly amid favorable conditions.
Typhoon Chan-hom, known in the Philippines as Typhoon Falcon, was a large, powerful and long-lived tropical cyclone that affected most countries in the western Pacific basin. The ninth named storm of the 2015 Pacific typhoon season, Chan-hom developed on June 29 from a westerly wind burst that also spawned Tropical Cyclone Raquel in the southern hemisphere. Chan-hom slowly developed while moving to the northwest, aided by warm waters but disrupted by wind shear. The storm meandered near the Northern Marianas Islands, passing over the island of Rota before beginning a steady northwest track. While near the island, the storm dropped heavy rainfall on neighboring Guam, causing flooding and minor power outages. Chan-hom intensified into a typhoon on July 7, and two days later passed between the Japanese islands of Okinawa and Miyako-jima. There, strong winds left 42,000 people without power, while 27 people were injured. Around that time, the storm caused a surge in the monsoon trough, in conjunction with Tropical Storm Linfa, which caused flooding and killed 16 people in the Philippines.
Tropical Storm Dianmu was a weak tropical cyclone that caused considerable damage over parts of Mainland Southeast Asia during late-September 2021. The fifteenth named storm of the 2021 Pacific typhoon season, Dianmu originated from an area of low-pressure situated in the South China Sea on September 21. Being first monitored by the Joint Typhoon Warning Center, the system rapidly consolidated to a tropical depression on September 22 as it continued to approach Vietnam before strengthening further to a weak tropical storm, with the Japan Meteorological Agency naming it as "Dianmu". Little intensification occurred before it made landfall on the country with winds of 35 knots. It then rapidly weakened over land and dissipated on September 24 as a tropical cyclone.
