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2004 Pacific typhoon season

2004 Pacific typhoon season
Season summary map
Season summary map
First storm formed: February 11, 2004
Last storm dissipated: December 21, 2004
Strongest storm: Chaba - 910 hPa (mbar), 285 km/h (180 mph)
Total storms: 29
Typhoons: 19
Super typhoons: 7
Total fatalities: 2,073
Total damage: Unknown
Pacific typhoon seasons
2002 2003 2004 2005 2006

The 2004 Pacific typhoon season has no official bounds; it ran year-round in 2004, but most tropical cyclones tend to form in the northwestern Pacific Ocean between May and November.[1] These dates conventionally delimit the period of each year when most tropical cyclones form in the northwestern Pacific Ocean.

The scope of this article is limited to the Pacific Ocean, north of the equator and west of the international date line. Storms that form east of the date line and north of the equator are called hurricanes; see 2004 Pacific hurricane season. Tropical Storms formed in the entire west pacific basin are assigned a name by the Tokyo Typhoon Center. Tropical depressions in this basin have the "W" suffix added to their number. Tropical depressions that enter or form in the Philippine area of responsibility are assigned a name by the Philippine Atmospheric, Geophysical and Astronomical Services Administration or PAGASA. This can often result in the same storm having two names.

Storms

Typhoon Sudal (Cosme)

Typhoon Sudal (Cosme)
Super Typhoon 03W
4
Super Typhoon Sudal 2003.jpg Sudal 2004 track.png
Duration April 4April 16
Intensity 90 kt (10-min), 940 hPa

On April 4, Tropical Depression 03W began its life between Chuuk and Pohnpei. As it drifted to the northwest, it strengthened into a tropical storm. Sudal turned to the west, and steadily intensified to become a typhoon on April 6. On the April 9, with maximum sustained winds of 115 kt/130 mph, Typhoon Sudal hit the island of Yap. After ravaging the island, Sudal reached a peak of 125 kt/150 mph winds. The typhoon turned to the northeast and became extratropical on the April 15. Yap experienced catastrophic damage, with 90% of buildings destroyed, 1,500 left homeless, and one fatality. Sudal is a Korean word meaning otter.

Typhoon Nida (Dindo)

Typhoon Nida (Dindo)
Super Typhoon 04W
5
Typhoon nida 2004 may 18.jpg Nida 2004 track.png
Duration May 14May 21
Intensity 95 kt (10-min), 935 hPa

The monsoon trough spawned Tropical Depression 04W east of the Philippines on May 13. The depression quickly strengthened, reaching tropical storm intensity on May 14 and typhoon status just six hours later. On May 15 and May 16 while moving northwest towards the Philippine coast, Nida rapidly intensified to a 135 kt/160 mph super typhoon, and crossed the eastern Philippines shortly thereafter. Nida weakened slightly over the islands, and began to move to the north and northeast in response to a break in the subtropical ridge. It became extratropical on May 21 east of Japan, after causing 31 deaths and about $1.3 million in damage. Nida is a Thai female name.

In the Philippines, evacuation centers were opened to accommodate 2,986 people. The typhoon approach canceled ferry operations stranding 15,057 passengers.[2] In Taiwan, forecasters at the Central Weather Bureau issued a typhoon warning as forecast models predicted a high probability of the typhoon hitting Taiwan.[3]

Severe Tropical Storm Omais (Eteng)

Severe Tropical Storm Omais (Eteng)
Typhoon 06W
1
TS Omais 2004.jpg Omais 2004 track.png
Duration May 18May 21
Intensity 50 kt (10-min), 985 hPa

A tropical disturbance southwest of Chuuk organized into a tropical depression on May 16, one of 3 active tropical cyclones in the Western Pacific at the time. The depression developed quickly, reaching tropical storm status later that day and reaching a peak of 60 kt/70 mph winds three days later on May 19. A weakening ridge brought Omais northward, where it became extratropical on May 22. Operationally, Omais was classified as a typhoon, but in post-analysis, it was dropped to a tropical storm. Omais is a Palauan word meaning 'wandering around'.

Typhoon Conson (Frank)

Typhoon Conson (Frank)
Typhoon 07W
2
Typhoon Conson 2004.jpg Conson 2004 track.png
Duration June 6June 11
Intensity 80 kt (10-min), 960 hPa

In the South China Sea, a stationary area of disturbed weather developed into Tropical Depression 07W on June 4. It tracked eastward then northeastward, becoming a tropical storm on June 5 and a typhoon on June 7. Conson passed between Luzon and Taiwan, and peaked with 100 kt/115 mph winds on June 9. Conson weakened as it continued northeastward, and became extratropical on June 11 near Japan without causing any reported damage. Conson is an area in Vietnam containing many historical monuments.

Severe Tropical Storm Chanthu (Gener)

Severe Tropical Storm Chanthu (Gener)
Typhoon 08W
1
Typhoon Chanthu 2004.jpg Chanthu 2004 track.png
Duration June 10June 13
Intensity 60 kt (10-min), 975 hPa

A westward moving disturbance was immediately upgraded to Tropical Storm Chanthu on June 9, just east of the Philippines. It crossed the islands, and strengthened in the South China Sea to a typhoon on June 12. After peaking with 75 kt/85 mph winds, Chanthu hit central Vietnam on June 12, and dissipated the next day. Seven people were killed in the heavy flooding. Chanthu is a type of flower found in Cambodia.

Typhoon Dianmu (Helen)

Typhoon Dianmu (Helen)
Super Typhoon 09W
5
Typhoon dianmu 2004.jpg Dianmu 2004 track.png
Duration June 13June 21
Intensity 100 kt (10-min), 915 hPa
Main article: Typhoon Dianmu (2004)

Tropical Depression 09W, which developed from the monsoon trough on June 13, headed north in the open Western Pacific. On the June 15 and June 16, Dianmu rapidly intensified from a 70 kt/80 mph typhoon to a 155 kt/180 mph super typhoon, one of nine typhoons since 1990 to reach that intensity. It lost some organization on June 18, but re-strengthened on June 19 to a super typhoon while south of Okinawa. Some dry air weakened Dianmu as it continued its northward movement, and hit southern Japan as a 55 kt/65 mph tropical storm on June 21. Dianmu became extratropical that night after causing 3 deaths. Dianmu is the name of the goddess of thunder and lightning in Chinese folklore.

Typhoon Mindulle (Igme)

Typhoon Mindulle (Igme)
Typhoon 10W
4
TyphoonMindulle2004.jpg Mindulle 2004 track.png
Duration June 23July 4
Intensity 95 kt (10-min), 940 hPa

The monsoon trough spawned a tropical depression on June 23 near Guam. It tracked westward, becoming a tropical storm that night but slowly strengthening as it continued westward due to vertical wind shear. When the shear abated, Mindulle quickly intensified, reaching typhoon strength on June 27 and peaking at 125 kt/145 mph winds on June 28. Land interaction with Luzon to its south weakened Mindulle, and the typhoon weakened as it turned northward. On July 1 Mindulle hit eastern Taiwan, and after accelerating to the northeast became extratropical near South Korea on July 4. Mindulle caused 56 deaths, with $317.2 million in damage in its path (2004 USD). Mindulle is the Korean word for the dandelion.

Typhoon Tingting

Typhoon Tingting
Typhoon 11W
1
TyphoonTingting2004.jpg Tingting 2004 track.png
Duration June 26July 4
Intensity 80 kt (10-min), 955 hPa

Tropical Depression 11W, which developed from the monsoon trough on June 25, steadily strengthened as it tracked to the northwest, and reached tropical storm status on June 26. Tingting passed Saipan on June 27, and reached typhoon status early on June 28. After maximum sustained winds peaked at 80 kts/90 mph, the typhoon turned to the northeast, where it became extratropical on July 3 after causing 3 deaths on Saipan. Tingting is a pet name for young girls in Chinese.

Tropical Storm Kompasu (Julian)

Tropical Storm Kompasu (Julian)
Tropical Storm 12W
TS
tskompasuIR.jpg Kompasu 2004 track.png
Duration July 14July 16
Intensity 45 kt (10-min), 992 hPa

An area of thunderstorms and convection organized into Tropical Depression 12W on July 13. Under high vertical shear and with a very small circulation, it was not expected to strengthen further. However, as it tracked erratically westward, it intensified, peaking with 40 kt/50 mph winds on July 14. Kompasu turned northward, hit the eastern part of Hong Kong directly as a minimal tropical storm, and dissipated on July 16. Kompasu is the Japanese word for compass, and the name of the constellation Circinus.

Typhoon Namtheun

Typhoon Namtheun
Typhoon 13W
4
Typhoon Namtheun 2004.jpg Namtheun 2004 track.png
Duration July 25August 2
Intensity 85 kt (10-min), 935 hPa

Tropical Storm Namtheun, which formed on July 25, rapidly intensified on July 26 to a 115 kt/135 mph typhoon. Dry air approached the system from the south, and it weakened as it tracked northwest towards Japan. On July 31, Namtheun hit southwest Japan as a 55 kt/65 mph tropical storm, and became extratropical in the Sea of Japan on August 1. The storm caused no deaths or damage, with only 6 injuries. Namtheun is the name of a river in Laos.

Tropical Storm Malou

Tropical Storm Malou
Tropical Storm 15W
TS
TS Malou 2004.jpg Malou 2004 track.png
Duration August 4August 4
Intensity 40 kt (10-min), 996 hPa

An area of convection under moderate to high vertical wind shear developed into a tropical depression southeast of Japan on August 4. It became a minimal tropical storm before hitting central Japan on the night of August 4. Malou turned to the northeast and became extratropical in the Sea of Japan on August 5. Malou is the Chinese name for the mineral agate.

Typhoon Meranti

Typhoon Meranti
Typhoon 14W
2
typhoonmerantiIR.jpg Meranti 2004 track.png
Duration August 4August 9
Intensity 75 kt (10-min), 960 hPa

Meranti formed near Wake Island on August 2 and reached its peak intensity of 90 kts/105 mph on August 5 before dissipating on August 8. Meranti was the only one of the six August typhoons which did not affect any populated areas. Meranti is a type of tree found in Malaysia.

Typhoon Rananim (Karen)

Typhoon Rananim (Karen)
Typhoon 16W
2
Typhoon Rananim 2004.jpg Rananim 2004 track.png
Duration August 8August 13
Intensity 80 kt (10-min), 950 hPa

Rananim formed on August 7 and reached its maximum intensity of 90 kts/105 mph on August 12 before making landfall in the Zhejiang Province of China later that day. In advance of the storm, 415,000 people were evacuated. Rananim caused as much as 686 mm/27" of rain in parts of Zhejiang, killing 115 people, injuring 1800 and causing US$4 billion in direct economic losses. It was the worst typhoon to hit China since Winnie in 1997. Rananim is the Chuukese word for 'hello'.

Tropical Storm Malakas

Tropical Storm Malakas
Tropical Storm 17W
TS
tsmalakasIR.jpg Malakas 2004 track.png
Duration August 11August 13
Intensity 45 kt (10-min), 990 hPa

A reverse-oriented monsoon trough extended from the Philippine Sea northeastward for hundreds of miles spawned a disturbed area around 22N/150E late on August 8. A weak tropical depression formed out of this area late on August 9. Deep convection was in a cycling mode, and satellite imagery initially indicated that the system was subtropical in nature. The depression was upgraded to Tropical Storm Malakas as it took on a more tropical appearance about 670 miles west-northwest of Wake Island, and it moved northeastward along the northern periphery of the subtropical ridge. By August 12, satellite imagery indicated that Malakas was becoming extratropical. JMA declared the system extratropical on the August 14, placing the weak 25 kt/30 mph low approximately 575 miles north-northwest of Midway Island. Malakas is a Filipino word meaning 'strong' or 'powerful'.[4]

Typhoon Megi (Lawin)

Typhoon Megi (Lawin)
Typhoon 18W
1
Typhoon Megi 2004.jpg Megi 2004 track.png
Duration August 16August 20
Intensity 65 kt (10-min), 970 hPa

Typhoon Megi was the fourth of eight significant tropical cyclones to form during August. Megi was initially spotted 260 miles west of Guam on August 11, slowly developing into Tropical Depression 18W on the August 14, strengthening into a tropical storm on the August 16, and ultimately into a typhoon on the August 18 to the southwest of Japan. Megi moved northwest through the Ryukyu islands before recurving northeastward towards South Korea and Japan. Megi sped across northern Honshū before completing its transition into a nontropical low off the east coast of Hokkaidō. The resultant ocean cyclone moved rapidly eastward, reaching a point near 42N/174E late on the August 22.

Despite peaking at only minimal typhoon intensity, Megi had a significant impact on both Japan and South Korea. In Japan, the highest storm total rainfall noted was 610 mm at Tomisato between August 17 and August 21, with 398 mm falling in a 24 hour period. The highest wind gust was 109 mph/48.7 m/s at Izuhara, Nagasaki early on the August 19. The lowest measured pressure was 974.1 mb at Isuhara. In South Korea, the heaviest 24 hour rain total was 332.5 mm at Wando between late on the August 17 and August 18. News reports indicated that five people were reported dead or missing after Typhoon Megi in South Korea. The number left homeless rose to more than 2400. Typhoon Megi left at least ten dead in Japan. Megi's landfall on northern Japan resulted in large blackouts as 130,000 homes were left in the dark. A group of about 165 primary school students were stranded by a Megi-induced landslide in western Japan, though were successfully rescued by helicopter. Megi is the Korean word for the catfish.[4]

Typhoon Chaba

Typhoon Chaba
Super Typhoon 19W
5
TyphoonChaba2004.jpg Chaba 2004 track.png
Duration August 19August 31
Intensity 110 kt (10-min), 910 hPa

Chaba formed on August 18 in the open Western Pacific. It moved westward, strengthening into a tropical storm on the August 19 and a typhoon on August 20. Chaba turned to the northwest, and rapidly intensified to a 155 kt/180 mph super typhoon on the August 22 with an estimated minimum central pressure of 879 mbar, among the lowest on record. After fluctuating between 100 kt/115 mph and super typhoon status for several days, Chaba weakened as it turned to the north, and hit the southwestern Japanese island of Honshū. It accelerated to the northeast, and became extratropical on August 31. The storm killed seven people and brought extensive flooding to Honshū. Chaba is a type of tropical flower.

Typhoon Aere (Marce)

Typhoon Aere (Marce)
Typhoon 20W
2
Typhoon Aere 2004.jpg Aere 2004 track.png
Duration August 20August 26
Intensity 80 kt (10-min), 955 hPa
Main article: Typhoon Aere (2004)

Aere is the Marshallese word for 'storm'. A tropical disturbance developed into a tropical depression on the 19th about 400 miles west of Guam, and moved northwest at 10 kts/12 mph along the southwestern periphery of a mid-level steering ridge. The system reached tropical storm status on the 20th, gaining the name Aere. Aere subsequently crossed into the Philippine's area of responsibility and was assigned the name Marce. Aere was upgraded to typhoon intensity on the 21st, and its strength leveled off during the 21st and 22nd. On the 23rd, Typhoon Aere was downgraded to a tropical storm briefly due to vertical wind shear while located 200 miles south of Naha, Okinawa. Aere quickly regained typhoon strength and maintained intensity for the rest of the 23rd and developed a 50-mile wide eye. Aere reached its peak intensity of 85 kts/100 mph late on the 24th, when the pressure lowered to 955 mb. As the storm crossed the northern tip of Taiwan it began to weaken. Aere turned southwestward later that day, a trajectory that carried the storm past Xiamen early on the 26th and close to Shantou later that day before weakening into a tropical storm. The remnants of Typhoon Aere remained a tropical depression until the 31st.

Early on the 25th, six villages located in Gaoqiao Town, Yinzhou District, Ningbo City, were struck by a tornado triggered by Typhoon Aere. The tornado did cause some economic losses, but no casualties were reported. Preliminary statistics indicated that the typhoon had caused 2.485 billion yuan of direct economic losses and was responsible for two deaths in Fujian province. Aere also affected 3,479,900 residents in 421 towns of 48 counties of 6 cities in Fujian, where three cities were flooded, 10,100 houses were toppled, 236 embankments and thousands of water conservancy facilities were damaged. Thirty-four people were killed in Taiwan as a result of the storm, and fifteen died as a mudslide buried a remote mountain village in the north of the island. Agricultural losses were estimated at 7.7 million New Taiwan dollars ($US 313,000). Forty-three deaths in the Philippines were caused by heavy rains induced by the typhoon. Eight provinces in northern and central Luzon were most severely affected with 70% of the provinces under water at one point.[4]

Typhoon Songda (Nina)

Typhoon Songda (Nina)
Super Typhoon 22W
4
Super Typhoon Songda 2004.jpg Songda 2004 track.png
Duration August 28September 8
Intensity 95 kt (10-min), 925 hPa

The name Songda is from a branch of the Red River in Vietnam. Songda was the second super typhoon to affect the Marianas and Japan in a week, soon after Super Typhoon Chaba passed through the same area. Tropical Depression 22W underwent rapid strengthening and was soon upgraded to tropical storm intensity on August 28th, and was on the verge of typhoon intensity by local midnight. Sustained winds of tropical storm force and gusts to typhoon force were seen in Eniwetak as the cyclone passed by to the north. Continuing on its west-northwesterly heading, Songda reached typhoon intensity late on the 29th approximately 760 miles east of Saipan. By the 1st, Songda became the fifth super typhoon of 2004. Typhoon-force wind gusts were observed on Pagan and Agrihan as the eyewall of Songda approached. Songda weakened slight below super typhoon force quickly after achieving the intensity and turned northwest. The center of Songda passed 17 miles north-northeast of Agrihan on the 1st. The cyclone then turned westward and headed for Okinawa. On the 3rd, Typhoon Songda gained the name Nina after entering PAGASA's area of warning responsibility. Typhoon Songda's strength began to wane as it neared Okinawa. Typhoon Songda passed a short distance north of the island by late on the 5th with the lowest SLP of 924 mb recorded on the island. Weakening continued as the storm tracked to the northwest. Songda turned north-northwestward on the 6th and headed towards Japan. Songda came ashore near the city of Nagasaki with winds (10-min avg) of 80 kts/90 mph on the 7th. The tropical cyclone accelerated northeastwards at 34 kts/39 mph as it moved across southwestern Japan. Weakening continued, with winds below typhoon strength at by early on the 8th. Its forward speed increased to 50 kts/58 mph, and Songda became a nontropical low later that day. The extratropical gale continued eastward as it slowly weakened, and by late on the 10th it had crossed the Dateline into the Bering Sea.

Storm total rainfall amounts in Japan ranged as high as 905 mm at Morotsuka between the 4th and 9th, with 358 mm falling between the early morning of the 6th and 7th. The highest wind gust of 135 mph/60.2 m/s was measured at Hiroshima. The lowest pressure measured in Japan was 944.3 mb at Saga. In the Republic of Korea, Ulleungdo measured 112.0 mm between the 6th and 7th. News reports indicated that Typhoon Songda killed 20 people and injured 700 others in Japan. In addition, 15 crew members of a vessel were reported missing. Songda arrived shortly after three earthquakes had struck the country a few days prior.[4]

Severe Tropical Storm Sarika

Severe Tropical Storm Sarika
Tropical Storm 23W
TS
tssarikaIR.jpg Sarika 2004 track.png
Duration September 4September 7
Intensity 55 kt (10-min), 980 hPa

The name Sarika is originally from a songbird found in Cambodia. JMA classified a tropical depression early on September 4th. By the 5th, a typhoon warning was issued for the island of Agrihan. Moving west-northwest along the southern periphery of the subtropical ridge, Tropical Depression 23W was upgraded to Tropical Storm Sarika that day. An upper-level LOW located to the southeast was providing an efficient eastern outflow channel in addition to the decent equatorial outflow. Rapid intensification ensued for awhile with the MSW rising to 60 kts/70 mph late on the 5th, which was the peak intensity for Sarika. By the 6th, Tropical Storm Sarika passed 220 miles north of Saipan. Shortly afterward, the system's centre made its closest approach to Agrihan, tracking 10 miles south of that island. Near-typhoon conditions occurred on both Agrihan and Pagan while tropical storm-force winds were experienced on Alamagan. At its peak Sarika possessed a very compact wind field with gales extending no further than 90 miles from the centre while the radius of strongest winds never exceeded 15 miles. By the 6th, Sarika had turned westward 100 miles west of Agrihan. Early on the 7th, Sarika began to weaken as it entered a hostile shearing environment associated with Typhoon Songda's outflow. Sarika subsequently turned to the north-northwest at 9 mph/8 kts about 820 miles south of Tokyo, Japan while becoming fully-exposed. It slowed as it turned northward late on the 7th. The system remained a tropical storm until the 8th when Sarika weakened back into a depression.[5]

Tropical Storm Haima (Ofel)

Tropical Storm Haima (Ofel)
Tropical Storm 24W
TS
tshaimaIR.jpg Haima 2004 track.png
Duration September 11September 13
Intensity 40 kt (10-min), 996 hPa

Haima is the Chinese word for the sea horse. Early on September 11th, an area of thunderstorms was observed 150 nm southwest of Taipei, Taiwan. Later that day, the newly-formed tropical depression saw its thunderstorms track across Taiwan, leaving the circulation center behind east of the mountainous isle as it took on a subtropical appearance. By the 12th, it had strengthened into a tropical storm named Haima by Japan and Ofel by the Philippines...the Joint Typhoon Warning Center considered the system a tropical depression or subtropical storm, but never a tropical storm. The center track just east of Taiwan on the 12th, towards the southeast coast of China. Haima made landfall south of Shanghai on the 13th before turning to the northwest. Haima soon become a completely sheared system due to interaction with the upper level winds over a frontal zone located to its west, and was declared dissipated on the 14th.

In China, the lowest reported pressure was 998 mb in Yongqiang Town on the 13th and the highest 24 hour rainfall recorded was 250.8 mm at Pingtan in Fuzhou City between the 09th and 10th, which set a new September daily rainfall record for the station. In Taiwan, daily rainfall ranged as high as 393 mm in Taipei county, and 611.5 mm in Taipei City. The highest wind gust reported was 80 mph/35.9 m/s at Lanyu on the 11th. The storm damaged 78 square kilometres of farmland in Zhejiang Province, China, where direct economic losses were estimated to have been over 53 million yuan. Torrential rains (Sep 7-10), including those in the monsoonal flow around the pre-Haima depression had caused 54.6 million yuan of direct economic losses in Pingtan County and Changle City. In Japan, rainfall and winds were relatively light. In South Korea, the highest 24 hour rainfall report noted was 104.5 mm at Wando between the 11th and 12th.[5]

Typhoon Meari (Quinta)

Typhoon Meari (Quinta)
Typhoon 25W
4
Typhoon Meari 2004.jpg Meari 2004 track.png
Duration September 20September 30
Intensity 90 kt (10-min), 940 hPa

Meari is Korean for 'echo'. Late on September 18th, an area of convection was spotted 510 miles east of Guam. On the 20th, Tropical Depression 25W organized out of this mass and was located just 35 miles southeast of Guam. Tropical Depression 25W turned more westward and began to accelerate as it moved along the southern periphery of a warm-core ridge. On the 21st, the system was upgraded to Tropical Storm Meari. It intensified steadily while moving more northwestward. The system was upgraded to typhoon intensity by late on the 22nd. Typhoon Meari possessed a very asymmetric circulation, elongated a bit to the north and northeast. Meari became a strong 100-kt/115 mph typhoon by late on the 23rd, and was assigned the name Quinta by PAGASA. After reaching 120 kts/140 mph on the 24th, its strength plateaued for the rest of the day. As it passed 70 miles south of Okinawa early on the 26th, Meari was slowly weakening. The cyclone ceased movement on the 27th about 170 miles west of Okinawa as it became lodged between two anticyclones. A slow northward drift began later that day and vertical wind shear associated with the subtropical jet stream began to take its toll on Meari. By the 29th, Meari was beginning its approach to the Japanese island of Kyūshū. Typhoon Meari made landfall over the southern tip of Kyūshū around midday local time with maximum sustained winds of 70 kts/80 mph. Meari weakened back into a tropical storm late on the 29th. The forward motion began to accelerate as Meari increasingly interacted with the westerlies. The system was followed until the 30th, when it became a nontropical low, which continued tracking eastwards through the north Pacific.

The highest wind gust reported was 118 mph/52.7 m/s in Kagoshima early on the 29th. The lowest pressure measured during the passage of Meari was 975.5 mb, also at Kagoshima on the 29th. Three tornadoes were spawned in Japan, with two touching down in Okinawa Prefecture and one in Aichi Prefecture. The heaviest rains in Japan were saved for Osawe, where 904 mm fell between late on the 24th and the 30th, with 741 mm falling between late on the 28th and 29th. Reports indicate that at least 18 people died with several more reported missing as a result of Typhoon Meari. The worst affected areas were the prefectures of Mie and Ehime in Japan where torrential rains caused widespread flooding and mudslides destroyed several homes. Train and ferry services were suspended, stranding thousands of people.[5]

Typhoon Ma-on (Rolly)

Typhoon Ma-on (Rolly)
Super Typhoon 26W
5
Super Typhoon Ma-on 2004.jpg Ma-on 2004 track.png
Duration October 4October 10
Intensity 100 kt (10-min), 920 hPa

Ma-on is the name of a mountain in Hong Kong. Ma-on formed from a cluster of thunderstorms in the vicinity of Guam on September 29th. The small system eventually trekked west-northwesterly. After days of sputtering across the western Pacific, Tropical Depression 26W formed on October 4th, and quickly became named Tropical Storm Ma-on. The system became stationary approximately 650 nm southeast of Okinawa, Japan. PAGASA named the cyclone Rolly when it passed the 135th meridian. On the 5th, a northward drift ensued while well southeast of Okinawa. Upon reaching typhoon intensity late on the 06th, Ma-on turned northwest and ultimately became the sixth super typhoon of the year on the 8th while 250 miles southeast of Okinawa. The typhoon become the worst storm to hit eastern Japan in over ten years, only a week after Typhoon Meari had made landfall in that nation. Ma-on started to accelerate northeastward and its eye began to shrink in diameter and became more ragged. A slow weakening trend materialized as it entered the early stages of extratropical transition. Recurving northeast at a high rate of translation, Ma-on made landfall on the Izu Peninsula, Honshū, Japan, late on the 9th with maximum sustained winds of 90 kts/105 mph. Ma-on weakened rapidly and was downgraded to a tropical storm by the 10th, and quickly completed its transformation into a nontropical low. The remnant system moved more east-northeastward away from eastern Japan before slowing its motion 1100 miles southeast of Hokkaidō.

Ma-on was one of the most powerful storms to strike eastern Japan over the last ten years. The highest wind gust reported was 151 mph/67.6 m/s in Irouzaki late on the 9th. The lowest pressure was also recorded at Irouzaki; 964 mb late on the 9th. The typhoon left at least six people dead, and three persons were reported missing. Plane, train and ferry services nationwide were disrupted, stranding thousands of travellers. Heavy downpours also disrupted practice sessions for Formula One's Japanese Grand Prix in Suzuka. The highest storm total amount was noted at Omaezaki, where a 413 mm deluge was seen between late on the 6th and 9th, with 360 mm falling in a 24 hour period. Rescuers on boats plucked dozens of residents from waterlogged homes in Shizuoka Prefecture.[6]

Typhoon Tokage (Siony)

Typhoon Tokage (Siony)
Typhoon 27W
4
Typhoon Tokage 19 oct 2004 0215Z.jpg Tokage 2004 track.png
Duration October 13October 20
Intensity 85 kt (10-min), 940 hPa

Tokage is the Japanese word for lizard. On October 12th, an area of convection existed 480 miles east-southeast of Guam. The system developed into Tropical Depression 27W at late that day, moving in a west-northwesterly at 15 kts about 200 miles east of Guam. On the October 13, the system developed into a tropical storm, and was named Tokage, subsequently moving very close to the islands of Rota and Guam. Typhoon intensity was achieved early on October 14 when centered 970 miles southeast of Okinawa. Later that day, Tokage briefly turned to the west-southwest. The storm's path curved back to a northwesterly heading by the October 15. The storm curled towards the north as a major shortwave over weakened the subtropical ridge and by October 17 Tokage reached its peak intensity of 125 kts/145 mph. Weakening began later that day as the storm turned back to a more northwesterly heading towards Okinawa and Japan. On October 18, Typhoon Tokage was 290 miles south of Kadena Air Base, Okinawa. Recurvature back to the north-northeast towards Japan ensued while the typhoon slowly weakened. Tokage made its closest approach to Okinawa late on October 19 when it was passed just to the south-southeast. The storm turned to the northeast as continued to accelerate as its extratropical transition began. Tokage made landfall over Tosa-Shimizu, near the southern tip of Shikoku, Japan still at typhoon strength. By October 21, the cyclone weakened into a tropical storm 130 nm west of Tokyo, and later that day, the system completed the transition to a nontropical low. The extratropical remains of Tokage moved rapidly northeastward, crossing the International Dateline around midday on October 23.

The highest measured wind gust was 142 mph/63.7 m/s at Unzendake, Nagasaki on October 20. The lowest pressure from a land station was 949.4 mb at Okinoerabu, Kagoshima late on October 19. The highest rainfall amount noted in Japan was 550 mm at Fukuharaasahi between late on October 17 and October 21, with 470 mm falling within a 24 hour period. News reports indicated Tokage was the worst storm to strike Japan since Typhoon Mireille thirteen years before. A total of 69 deaths were attributed to high winds, flooding and mudslides caused by Tokage. A total of 18,000 people were forced to evacuate their homes.[6]

Typhoon Nock-ten (Tonyo)

Typhoon Nock-ten (Tonyo)
Typhoon 28W
3
Typhoon Nock-ten 2004.jpg Nock-ten 2004 track.png