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2007 Pacific typhoon season

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2007 Pacific typhoon season
Seasonal boundaries
First system formedMarch 31, 2007
Last system dissipatedSeason currently active
Strongest storm
NameYutu
 • Maximum winds175 km/h (110 mph)
 • Lowest pressure935 hPa (mbar)
Seasonal statistics
Total storms3
Typhoons2
Super typhoons0 (unofficial)
Total fatalities0
Total damageUnknown
Pacific typhoon seasons
2005 2006 2007 2008 2009
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The 2007 Pacific typhoon season has no official bounds; it runs year-round in 2007, 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 2007 Pacific hurricane season. Tropical Storms formed in the entire West Pacific basin are assigned a name by the Japan Meteorological Agency (JMA). Tropical depressions in this basin have the "W" suffix added to their Joint Typhoon Warning Center identifier. 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 (PAGASA). This can result in the same storm having two names.

Storms

In storm information below, wind-speed advisories differ from the Joint Typhoon Warning Center (JTWC) to the JMA as the JTWC uses the United States criteria of 1-minute mean to designate maximum sustained winds, while the JMA uses the 10-minute mean wind criteria to designate tropical cyclone maximum sustained winds. This difference generally results in JTWC maximum winds appearing higher than the maximum winds described by the JMA for the same cyclone.

Typhoon Kong-rey

Main article: Typhoon Kong-rey (2007)
  
DurationUnknown – Unknown
Peak intensityWinds not specified;

On March 26, the Naval Research Laboratory (NRL) identified a broad area of low pressure in the Western North Pacific. It moved west-northwestward over the next few days, slowly gaining organization. According to the Japan Meteorological Agency, it became a tropical depression on March 30. The next day, the Joint Typhoon Warning Center issued a Tropical Cyclone Formation Alert due to an increased consolidation of the low-level circulation of the system. The JTWC issued its first warning on Tropical Depression 01W late that evening local time. As it continued to strengthen, the JTWC upgraded it to a tropical storm, the first of the season. The JMA followed suit, and named the system Kong-rey. The name was submitted by Cambodia, and refers to a character in a Khmer legend, which is also the name of a mountain.[2]

Kong-rey continued to organize and intensified into a severe tropical storm early the next morning local time. The JTWC then upgraded it to a typhoon on April 2. As the system took a more poleward track towards the Northern Mariana Islands, the National Weather Service office in Guam noted that damaging winds were now not expected on the island. Elsewhere in the Marianas, preparations were made and flights were cancelled in anticipation of the typhoon.

Kong-rey passed through the islands in the early hours of the morning on April 3 local time. The JMA upgraded Kong-rey to a typhoon later that afternoon, as it developed an eye. It strengthened slightly further before encountering wind shear and colder sea surface temperatures and was downgraded back to a severe tropical storm on April 4. As Kong-rey accelerated towards the northeast, it began undergoing extratropical transition early on April 5 and the JTWC issued its final warning. The JMA issued its final warning on the morning of April 6 after it had completed extratropical transition.

No casualties or major damage was reported.

Typhoon Yutu (Amang)

  
DurationUnknown – Unknown
Peak intensityWinds not specified;

On May 15, a significant consolidation of organisation in a tropical disturbance located south-southeast of Guam led to Dvorak technique numbers equating to a windspeed of 45 kt from the Air Force Weather Agency. Later that day, the Japan Meteorological Agency designated the system a tropical depression, and the Joint Typhoon Warning Center issued a Tropical Cyclone Formation Alert.[3] The next day, the JMA began issuing full advisories on the tropical depression. It developed slowly, resulting in a reissuance of the TCFA later that day. In this second TCFA, the JTWC noted "an increasingly well-defined" low-level circulation centre.[4] The JTWC upgraded the system to Tropical Depression 02W at 1200 UTC, based on satellite intensity estimates and QuikSCAT.[5]

The JMA designated 02W as Tropical Storm Yutu early on May 17, as the system strengthened further. The name 'Yutu' was contributed by China, and refers to a rabbit in a Chinese fable.[2] The JTWC followed suit 3 hours later, upgrading the system to Tropical Storm 02W as it moved quickly westwards, heading for Yap. Tropical storm warnings and watches were put in place for most of the Federated States of Micronesia, but were later cancelled after Yutu passed through quickly.

It then took a northwesterly turn, entered the PAGASA area of responsibility on May 18 as it reached severe tropical storm strength,[6] and was named "Amang". Later that day, the JTWC upgraded it to a typhoon, and identified a "distinct eye feature",[7] and the JMA upgraded the severe tropical storm to a typhoon at 1800 UTC as it continued to intensify. It began to recurve towards Iwo Jima, undergoing rapid intensification,[8] with "enhanced poleward outflow and low vertical wind shear".[9] It reached its peak on the evening of May 20, as a strong Category 4-equivalent typhoon, just short of becoming a super typhoon.

Despite moving into cooler waters, its strong poleward outflow helped it to maintain a high intensity, while carrying a 20 nautical mile-wide eye, on the early morning of May 21.[10] It then began to gradually weaken, passing over Okinotorishima and near Iwo Jima that day as it sped off to the northeast. Maximum winds on Iwo Jima occurred around 1500 UTC that day, with 66 kt (122 km/h, 76 mph) sustained gusting to 104 kt (193 km/h, 120 mph), when a minimum central pressure of 976 hPa was recorded.[11] It then started extratropical transition, and the JTWC issued its final warning on the morning of May 22. The JMA issued its last advisory after extratropical transition completed a day later.

Tropical Storm Toraji

An area of disturbed weather formed in the South China Sea on July 2 and gradually consolidated over the next two days as it moved west-northwestward. A Tropical Cyclone Formation Alert was issued by the Joint Typhoon Warning Centre on the morning of July 4, and later that day the disturbance was upgraded straight to a tropical storm just south-east of Hainan Island. It made landfall on the island shortly after. China claimed that a tropical depression formed in the morning on July 2, made landfall in Wanning, Hainan later that afternoon with maximum sustained winds of 15 m/s (55 km/h, 35 mph)[12] and then deepened slightly to 992hPa while overland.[13]

The Japan Meteorological Agency upgraded the tropical depression to Tropical Storm Toraji on the morning of July 5, after the centre of the storm had emerged back over water.

Other storms

These systems were not officially named as tropical storms by the JMA, although the JMA might have monitored them as tropical depressions. They were, however, designated as tropical cyclones by the Philippines (PAGASA), China (CMA), Thailand (TMD), and/or the JTWC.

TMD Tropical Depression

  
DurationUnknown – Unknown
Peak intensityWinds not specified;

On April 26, an area of disturbed weather formed east of the Malay Peninsula. On May 1, the Thai Meteorological Department (TMD) upgraded the same low pressure cell to a tropical depression in the Gulf of Thailand.[14] It made landfall 10 hours later in Amphoe Pathiu, Chumphon Province.[15] It then passed over the Isthmus of Kra into the Andaman Sea.

The TMD warned residents about heavy rainfall and possible flooding in western provinces during the system's passage. In Ratchaburi Province, disaster response teams prepared for the evacuation of settlements in mountaineous terrain on May 3.[16] The next day, Prachuap Khiri Khan Province was declared a disaster zone after low-lying areas were flooded with waters up to one metre deep. In the capital municipality, a prison was inundated, necessitating the evacuation of prisoners to Ratchaburi. In addition, a portion of rail was flooded, but train services were not disrupted. In Surat Thani Province, mudslides halted traffic in the municipal area. Multiple landslide warnings were also issued in other provinces.[17]

This system was not considered to be a tropical depression by any other agencies while in the Gulf of Thailand, but was tracked by the Naval Research Laboratory.

Timeline of recent events

Main article: Timeline of the 2007 Pacific typhoon season

July

July 4
  • 9 a.m. UTC - Tropical Storm 03W forms just southeast of Hainan Island.
  • 3 p.m. UTC - Tropical Storm 03W is downgraded to a tropical depression.
  • 9 p.m. UTC - The JTWC upgrades Tropical Depression 03W to Tropical Storm 03W.
July 5
  • 12 a.m. UTC - The JMA designates Tropical Storm 03W to be Tropical Storm Toraji.

Storm names

Western North Pacific tropical cyclones are named by the RSMC Tokyo-Typhoon Center of the Japan Meteorological Agency. Names are selected from the following lists, there is no annual list. Names were contributed by 13 members of the ESCAP/WMO Typhoon Committee, except for Singapore. The 13 nations or territories, along with Micronesia, each submitted 10 names, which are used in alphabetical order by the English name of the country. Names marked with an asterisk are set for retirement due to its effects in the 2006 season. Otherwise, the list is the same one used for the 2006 Pacific typhoon season except for Pakhar, Noksuri and Haikui, which replaced Matsa, Nabi, and Longwang.[18] The first storm of the season was named Kong-rey.

Contributing Nation Names
Cambodia Damrey Kong-rey 0701 Nakri Krovanh Sarika
China Haikui Yutu 0702 Fengshen Dujuan Haima
DPR Korea Kirogi Toraji 0703 (active) Kalmaegi Mujigae Meari
Hong Kong Kai-Tak Man-yi Fung-wong Choi-wan Ma-on
Japan Tembin Usagi Kammuri Koppu Tokage
Laos Bolaven Pabuk Phanfone Ketsana Nock-ten
Macau Chanchu* Wutip Vongfong Parma Muifa
Malaysia Jelawat Sepat Nuri Melor Merbok
Micronesia Ewiniar Fitow Sinlaku Nepartak Nanmadol
Philippines Bilis* Danas Hagupit Lupit Talas
RO Korea Kaemi Nari Changmi Sudal Noru
Thailand Prapiroon Wipha Mekkhala Nida Kulap
U.S.A. Maria Francisco Higos Omais Roke
Vietnam Saomai* Lekima Bavi Conson Sonca
Cambodia Bopha Krosa Maysak Chanthu Nesat
China Wukong Haiyan Haishen Dianmu Haitang
DPR Korea Sonamu Podul Noul Mindulle Nalgae
Hong Kong Shanshan Lingling Dolphin Lionrock Banyan
Japan Yagi Kajiki Kujira Kompasu Washi
Laos Xangsane* Faxai Chan-hom Namtheun Pakhar
Macau Bebinca Peipah Linfa Malou Sanvu
Malaysia Rumbia Tapah Nangka Meranti Mawar
Micronesia Soulik Mitag Soudelor Fanapi Guchol
Philippines Cimaron Hagibis Molave Malakas Talim
RO Korea Chebi Noguri Koni Megi Noksuri
Thailand Durian* Rammasun Morakot Chaba Khanun
U.S.A. Utor Matmo Etau Aere Vicente
Vietnam Trami Halong Vamco Songda Saola

Philippines

The Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) uses its own naming scheme for tropical cyclones within its area of responsibility. Lists are recycled every four years.

  • Amang 0702
  • Bebeng (unused)
  • Chedeng (unused)
  • Dodong (unused)
  • Egay (unused)
  • Falcon (unused)
  • Goring (unused)
  • Hanna (unused)
  • Ineng (unused)
  • Juaning (unused)
  • Kabayan (unused)
  • Lando (unused)
  • Mina (unused)
  • Nonoy (unused)
  • Onyok (unused)
  • Pedring (unused)
  • Quiel (unused)
  • Ramon (unused)
  • Sendong (unused)
  • Tisoy (unused)
  • Ursula (unused)
  • Viring (unused)
  • Weng (unused)
  • Yoyoy (unused)
  • Zigzag (unused)
  • Abe (unused)
  • Berto (unused)
  • Charo (unused)
  • Dado (unused)
  • Estoy (unused)
  • Felion (unused)
  • Gening (unused)
  • Herman (unused)
  • Irma (unused)
  • Jaime (unused)

See also

Template:Tcportal

References

  1. ^ http://www.typhoon2000.ph/garyp_mgtcs/may03sum.txt
  2. ^ a b http://www.jma.go.jp/jma/jma-eng/jma-center/rsmc-hp-pub-eg/tyname.html
  3. ^ http://www.webcitation.org/5OsVeLOvw
  4. ^ http://www.webcitation.org/5OsVVNnd6
  5. ^ ftp://ftp.met.fsu.edu/pub/weather/tropical/GuamStuff/2007051615-WDPN.PGTW
  6. ^ http://www.webcitation.org/5OvItpCgk
  7. ^ ftp://ftp.met.fsu.edu/pub/weather/tropical/GuamStuff/2007051815-WDPN.PGTW
  8. ^ http://www.webcitation.org/5OxtdN1za
  9. ^ ftp://ftp.met.fsu.edu/pub/weather/tropical/GuamStuff/2007052015-WDPN.PGTW
  10. ^ http://www.webcitation.org/5OzUSAWvv
  11. ^ http://www.webcitation.org/5P0yVygEO
  12. ^ http://news.tq121.com.cn/index.php?id=31962
  13. ^ http://weather.unisys.com/hurricane/archive/07070418
  14. ^ http://www.webcitation.org/5OYVtqA60
  15. ^ http://www.webcitation.org/5OflZMymj
  16. ^ http://etna.mcot.net/query.php?nid=29216
  17. ^ http://etna.mcot.net/query.php?nid=29232
  18. ^ http://www.smg.gov.mo/ccaa/typhoon/e_tcname_y2k.htm
 
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