Market2001 Pacific typhoon season
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2001 Pacific typhoon season

The 2001 Pacific typhoon season was an slightly above-average season with twenty-six named storms, sixteen typhoons and three super typhoons. It ran year-round in 2001, with most tropical cyclones in the northwestern Pacific Ocean tending between May and November.

Seasonal forecasts
During the year, the Japan Meteorological Agency (JMA) issued advisories on tropical cyclones west of the International Date Line to the Malay Peninsula, and north of the equator, in its role as the official Regional Specialized Meteorological Center, as designated by the World Meteorological Organization in 1989. The JMA issued forecasts and analyses every six hours starting at midnight UTC using numerical weather prediction (NWP) and a climatological tropical cyclone forecast model. They used the Dvorak technique and NWP to estimate 10-minute sustained winds and barometric pressure. The JTWC also issued warnings on storms within the basin, operating from Pearl Harbor in Hawaii and supplying forecasts to the United States Armed Forces in the Indian and Pacific Oceans. On January 31, Tropical Storm Risk (TSR) issued their extended range forecast for the Northwest Pacific in 2001, predicting near-average activity in terms of tropical storms, but a slightly below average in terms of typhoons. They predict that around 28 tropical storms would form, in which 17 of them would become typhoons, and 8 would further intensify to intense typhoons. TSR uses anomalous patterns of sea-surface temperatures (SSTs) over in the Niño 3.4 region (5°N-5°S, 120°W-170°W) during the August–September SST forecast as a predictor. With a predicted anomaly of −0.27 °C, a weak La Niña is expected — which tends to suppress tropical cyclone activity or intensity. On June 15, TSR issued their pre-season forecast, predicting a neutral typhoon season. Predicted tropical storm numbers have decreased to 26, but both their predicted typhoon and intense typhoon numbers have increased to 18 and 9, respectively. The key factor to this prediction is now due to the anticipated neutral value for the August–September SST forecast in the Niño 4 region (5°S – 5°N, 150°W – 160°E) of +0.27 °C. ==Seasonal summary==
Seasonal summary
ImageSize = width:1030 height:300 PlotArea = top:10 bottom:80 right:20 left:20 Legend = columns:2 left:30 top:58 columnwidth:270 AlignBars = early DateFormat = dd/mm/yyyy Period = from:01/01/2001 till:04/01/2002 TimeAxis = orientation:horizontal ScaleMinor = grid:black unit:month increment:1 start:01/02/2001 Colors = id:canvas value:gray(0.88) id:GP value:red id:TD value:rgb(0.43,0.76,0.92) legend:Tropical_Depression_=_≤62_km/h_(≤39_mph) id:TS value:rgb(0.3,1,1) legend:Tropical_Storm_=_62–88_km/h_(39–54_mph) id:ST value:rgb(0.75,1,0.75) legend:Severe_Tropical_Storm_=_89–117_km/h_(55–72_mph) id:TY value:rgb(1,0.85,0.55) legend:Typhoon_=_118–156_km/h_(73–96_mph) id:VSTY value:rgb(1,0.45,0.54) legend:Very_Strong_Typhoon_=_157–193_km/h_(97–119_mph) id:VITY value:rgb(0.55,0.46,0.90) legend:Violent_Typhoon_=_≥194_km/h_(≥120_mph) Backgroundcolors = canvas:canvas BarData = barset:Hurricane bar:month PlotData= barset:Hurricane width:10 align:left fontsize:S shift:(4,-4) anchor:till from:01/01/2001 till:04/01/2001 color:TY text:"Soulik" from:17/02/2001 till:20/02/2001 color:TD text:"Auring" from:16/04/2001 till:18/04/2001 color:TD text:"Barok" from:06/05/2001 till:07/05/2001 color:TD text:"TD" from:09/05/2001 till:14/05/2001 color:ST text:"Cimaron" from:17/06/2001 till:19/06/2001 color:TD text:"Darna" from:19/06/2001 till:24/06/2001 color:TY text:"Chebi" from:29/06/2001 till:02/07/2001 color:ST text:"Durian" from:01/07/2001 till:07/07/2001 color:ST text:"Utor" from:08/07/2001 till:11/07/2001 color:TS text:"Trami" from:10/07/2001 till:11/07/2001 color:TD text:"08W" from:16/07/2001 till:19/07/2001 color:TD text:"TD" from:21/07/2001 till:28/07/2001 color:TY text:"Kong-rey" from:22/07/2001 till:26/07/2001 color:ST text:"Yutu" from:25/07/2001 till:01/08/2001 color:TY text:"Toraji" barset:break from:01/08/2001 till:09/08/2001 color:TY text:"Man-yi" from:02/08/2001 till:03/08/2001 color:TD text:"TD" from:05/08/2001 till:08/08/2001 color:TD text:"TD" from:08/08/2001 till:11/08/2001 color:TS text:"Usagi" from:13/08/2001 till:22/08/2001 color:TY text:Pabuk" from:16/08/2001 till:19/08/2001 color:TD text:"Jolina" from:24/08/2001 till:27/08/2001 color:TD text:"15W" from:26/08/2001 till:02/09/2001 color:VSTY text:"Wutip" from:26/08/2001 till:28/08/2001 color:TS text:"Sepat" from:28/08/2001 till:01/09/2001 color:TS text:"Fitow" from:03/09/2001 till:12/09/2001 color:VSTY text:"Danas" from:05/09/2001 till:21/09/2001 color:TY text:"Nari" from:05/09/2001 till:07/09/2001 color:TD text:"TD" from:08/09/2001 till:10/09/2001 color:TD text:"TD" from:09/09/2001 till:12/09/2001 color:TD text:"TD" barset:break from:17/09/2001 till:21/09/2001 color:TY text:"Vipa" from:18/09/2001 till:25/09/2001 color:VSTY text:"Francisco" from:22/09/2001 till:30/09/2001 color:TY text:"Lekima" from:03/10/2001 till:09/10/2001 color:TY text:"Krosa" from:11/10/2001 till:18/10/2001 color:TY text:"Haiyan" from:19/10/2001 till:27/10/2001 color:VSTY text:"Podul" from:20/10/2001 till:21/10/2001 color:TD text:"TD" from:06/11/2001 till:12/11/2001 color:VSTY text:"Lingling" from:17/11/2001 till:25/11/2001 color:TD text:"Ondoy" from:18/11/2001 till:23/11/2001 color:TD text:"Pabling" from:04/12/2001 till:09/12/2001 color:TS text:"Kajiki" from:10/12/2001 till:12/12/2001 color:TS text:"31W" from:13/12/2001 till:25/12/2001 color:VITY text:"Faxai" from:26/12/2001 till:28/12/2001 color:TS text:"Vamei" bar:Month width:5 align:center fontsize:S shift:(0,-20) anchor:middle color:canvas from:01/01/2001 till:01/02/2001 text:January from:01/02/2001 till:01/03/2001 text:February from:01/03/2001 till:01/04/2001 text:March from:01/04/2001 till:01/05/2001 text:April from:01/05/2001 till:01/06/2001 text:May from:01/06/2001 till:01/07/2001 text:June from:01/07/2001 till:01/08/2001 text:July from:01/08/2001 till:01/09/2001 text:August from:01/09/2001 till:01/10/2001 text:September from:01/10/2001 till:01/11/2001 text:October from:01/11/2001 till:01/12/2001 text:November from:01/12/2001 till:01/01/2002 text:December The Accumulated Cyclone Energy (ACE) index for the 2001 Pacific typhoon season as calculated by Colorado State University using data from the Joint Typhoon Warning Center was 307.3 units. Broadly speaking, ACE is a measure of the power of a tropical or subtropical storm multiplied by the length of time it existed. It is only calculated for full advisories on specific tropical and subtropical systems reaching or exceeding wind speeds of . The season ran with weak La Niña conditions during the first quarter of the year and near-normal conditions throughout the rest of the year, with average sea-surface temperatures in the Niño 3.4 region of around −0.3 °C. It was the final year of a rather strong La Niña episode that persisted throughout most of the Pacific Ocean since 1998. This was demonstrated with this season's tropical activity being more active than the previous three seasons, but overall tropical activity still remaining below average. 2001 opened with Tropical Storm Soulik, from the previous season, active in the Philippine Sea. Soulik strengthened into the first typhoon seen this year and reached its peak intensity as a Category 3-equivalent typhoon on January 3, before quickly dissipating the next day. The formation of Tropical Depression 01W (Auring), however, officially initiated the start of the annual typhoon season on February 17. No tropical cyclones developed until after two months later, when another tropical depression had developed to the southeast of the Philippines. Tropical cyclogenesis gradually increased when May arrived – with three tropical systems developing. Two of these systems were only recognised as minor tropical depressions, while the other strengthened to the first official named storm of this year, Cimaron, which moved through the Philippine archipelago in the middle of the month. ==Systems==
Systems
Tropical Depression 01W (Auring) On 18:00 UTC of February 17, both the JMA and PAGASA began to track a tropical depression that was located about to the northeast of Surigao of Northern Mindanao. The PAGASA named the system, Auring. Auring brought rainfall throughout most of Visayas and Mindanao. At least 18 people died, with most of these deaths due to landslides that occurred from the torrential rain. In Leyte and most of Mindanao, flooding submerged the homes of 159,785 people. Damages from crops and property have been estimated at 200 million (US$4.16 million). The storm was weakened by vertical wind shear on May 12, before it resumed intensifying and by May 13, before transitioning into an extratropical cyclone and becoming last noted by the JMA on May 15. Furthermore, at Miyako Island, an additional  million (US$ million) of damages occurred, and 22 flights were cancelled for 14 days. The storm later approached Okinawa, and around 20,000 people were affected, due to roads being flooded, and land transportation was crowded. A landslide out of three occurred in Naha City, resulting in 19 people evacuating and a household losing power. The overall damages in Okinawa totaled  million (US$ million). Typhoon Chebi (Emong) On June 19, an area of convection developed southeast of Yap and by 18:00 UTC, was centered east-northeast of Palau. Rapid development occurred and the disturbance became identified as Tropical Depression 04W by the JTWC at 21:00 UTC. After entering the PAR and receiving the name Emong by PAGASA, the depression intensified into a tropical storm on June 20. Chebi headed northwest while being located east of the Philippines on June 21 at 06:00 UTC, and would later attain severe tropical storm intensity, before intensifying further to a typhoon the following day. The Penghu Islands, which took the brunt of the typhoon, suffered considerable damage as 102 fishing boats sank and ten thousand people were left without power. The storm also crippled ground and air traffic. A rain laden typhoon, Chebi produced 100 millimeters of rain across Guangdong. About 73 people were killed in China, most of them in the southeastern province of Fujian. The storm also destroyed several thousand acres of crops, resulting in economic losses. In Ningde, about 321,400 houses were destroyed by the typhoon. About 22 people were killed in Hangzhou when a landslide burst through a construction wall. Severe Tropical Storm Durian The monsoon trough produced another disturbance that upgraded into a tropical depression to the west of Luzon on June 29. The tropical depression tracked northwestward while a subtropical ridge influenced the depression and caused it to upgrade to Tropical Storm Durian on June 30. Throughout the provinces of Guangdong, Guangxi, and Hainan, more than 4.3 million people were affected, with over 13 thousand houses being destroyed. In Northern Vietnam, 32 people were killed and 3 people went missing, with more than 20 thousand homes being destroyed by flooding. Severe Tropical Storm Utor (Feria) Utor spawned from an area of convection that developed off south-southeast of Guam on June 26, that remained quasi-stationary for 2 days before upgrading to a tropical depression on July 1 due to favorable conditions such as low vertical shear. The depression strengthen into a tropical storm at 00:00 UTC on July 2. Trami mostly affected Taiwan with just rainfall. However, Kaohsiung and Pingtung counties experienced the heaviest rainfall in 40 years. In Kaohsiung City, streets were clogged with bonded cars due to severe flooding, and more than 100,000 homes were left without power. The floods resulted in only five deaths in the southern part of the city. At least 30 people were killed in a village located in Nantou County which was completely buried by mud and rocks. In the wake of the storm, Taiwan's Premier, Chang Chun-hsiung criticized the excessive development of Taiwan and lack of heedance of possible negative effects for the significant loss of life from Toraji. He also initiated a reforestation project to avoid future disasters of a similar scale. Typhoon Man-yi On July 31, the JTWC started to monitor on a tropical disturbance that had developed about to the north of Pohnpei. The system developed into a tropical depression the next day, with the JTWC designating it as 12W. A central dense overcast built up over cloud tops as cold as from infrared satellite imagery. 12W further strengthened to a tropical storm by August 2, with the JMA receiving the name Man-yi. Effects from the storm were much worse in Thailand. 200,000 hectares of farmland were submerged and thousands of homes were destroyed, leaving an estimated 450,000 people homeless. Deforestation in the mountainous areas of Phetchabun province brought in massive mudslides, especially in the Lom Sak District where its effects were much worse. At least 176 people have perished from the storm in Thailand, with most of these fatalities recorded in that district alone. Typhoon Pabuk On August 13, the JMA started to track a tropical depression that was embedded to the monsoon to the north-northwest of Saipan. Due to its rapid development, the JTWC issued a TCFA. The JTWC began issuing advisories; thereafter, giving the designation of 14W. All agencies upgraded 14W to a tropical storm the next day, after satellite imagery depicted a well-defined LLCC along with gale-force winds to the south of it. The JMA gave the storm the name Pabuk. Moving northwestward, Pabuk gradually intensified, and the JTWC upgraded the system to a typhoon on August 15; the JMA did the same 24 hours later. By August 17, Pabuk briefly reached its initial peak strength as a low-end Category 2 typhoon as it moved west-northwest before slowly weakening. During the next day, Pabuk began to re-intensify as a banding eye feature began to develop. Satellite animated imagery showed an eyewall forming with deep convection. By 06:00 UTC of August 19, Pabuk reached its second peak intensity with 1-minute sustained winds of . The typhoon grew in size, and its eye became irregular, hinting on a weakening trend while moving north northeastward. Pabuk weakened to tropical storm intensity when it hit the southern coast of Japan, south of Osaka, on 12:00 UTC of August 21. On August 22, both the JMA and the JTWC issued its final advisory after it became extratropical. Around 70 homes were flooded in the island of Amami Ōshima alone. Moreover, the launch of the next-generation rocket H-IIA was also halted due to stormy conditions. Throughout Japan, the storm resulted in eight fatalities and 141 injured people. 917 hectares of fields were damaged. Total damages from the typhoon amounted to ¥6.3 billion (US$ million). Tropical Depression 15W On 12:00 UTC of August 24, the JMA started to track a weak tropical depression that had developed about to the northwest of Wake Island. Typhoon Wutip A tropical disturbance that was embedded in a broad monsoonal circulation developed in the Philippine Sea on August 25. The JTWC upgraded Danas to a minimal typhoon by 18:00 UTC of September 4, while the JMA did the same six hours later. The town of Nikkō had recorded of rainfall over a four-day period. More than 140 domestic and international flights were canceled due to extreme winds and torrential rainfall. Typhoon Nari (Kiko) On September 5, a tropical depression developed northeast of Taiwan. Weak currents, which were prevalent throughout its lifetime, caused it to drift to the northeast where it became a tropical storm on the 6th. and up to of rain led to torrential flooding. Typhoon Vipa Vipa originated from an upper-level low developed near Wake Island. The low began to interact with the monsoonal flow to its southwest, making it form a "monsoonal gyre" type system. Later that day, the system quickly organised into a tropical storm while raining quasi-stationary, with the JMA naming it as Lekima. Subsequently, the storm began to move in a west-northwestward motion. Krosa moved in a quickly paced northwestward direction and entered an area of favourable environments. Later that day, the JMA upgraded Krosa to a severe tropical storm, and quickly into typhoon on October 5. Tropical Depression 28W (Ondoy) A tropical disturbance associated with the monsoon trough began to form about west-southwest of Pohnpei on November 14. Convection slowly deepened and the disturbance's structure began to consolidate. By 06:00 UTC of November 17, the JMA upgraded the system to a tropical depression. Animated satellite imagery revealed that its center became elongated with continued development of convection. the JTWC followed suit and began issuing advisories on 00:00 UTC of December 5 — giving the identifier of 30W. Tropical Storm Vamei Tropical Depression 32W formed east of Singapore at 1200 UTC (2000 SGT) on December 26. It is extremely unusual to see tropical development this close to the equator. Vamei brought strong winds and heavy rainfall to Malaysia, where rainfall reached over in Senai. Additionally, monsoonal moisture, influenced by the storm, produced moderate to heavy precipitation across various regions of peninsular Malaysia. Along Gunung Pulai, the rainfall caused a landslide which destroyed four houses and killed five people. Damage from the flooding was estimated at RM13.7 million (2001 MYR, $3.6 million 2001 USD). The Malaysian government provided affected families up to RM5,000 (2001 MYR, $1,300 2001 USD) in assistance for food, clothing, and repairs. Vamei also brought heavy rainfall to Singapore, which caused air traffic disruptions at the Singapore Changi Airport. Other systems On May 6, the JMA tracked a weak tropical depression off the northeastern coast of Mindanao. The system degenerated into a low-pressure area the next day. A tropical depression was briefly tracked by the Central Weather Bureau of Taiwan in the middle of May. The JTWC issued a TCWA on May 16, but the system moved inland over Vietnam in the Nam Dinh province. On July 16, the JMA began to monitor a tropical depression about east-northeast of Iwo Jima. The depression moved in a slow, erratic direction, and began moving east-northeastward. By July 18, the system was approaching a shortwave trough, causing it to weaken and dissipate the next day. Presumably related from the previous system, the JMA began to track another tropical depression that had developed near Shanghai on August 5. The system emerged to the Yellow Sea and impacted the Korean Peninsula on August 7, before dissipating on the next day. This tropical depression brought heavy rainfall across eastern China, with Huangpu District, Shanghai getting of rainfall. Due to this, 30,000 houses were destroyed, and moreover, the system produced a tornado near the area. On August 16, the PAGASA started to track Tropical Depression Jolina to the west of Dagupan. The depression slowly meandered in the place until its system's center became exposed, and dissipated on August 21. On October 20, a tropical depression had developed a couple hundred miles east of the coast of Vietnam. The JTWC issued a TCFA when the system was embedded in a broad area of convection. However, this was cancelled the next day when the system moved over Vietnam and dissipated. The tropical depression brought torrential rains all over Vietnam, which worsened the flooding that has been existing since August. 39 people have died with the added effects from the system, and damage totals from the overall flooding had reached 1.5 trillion (US$66.6 million). ==Storm names==
Storm names
Within the North-western Pacific Ocean, both the Japan Meteorological Agency (JMA) and the Philippine Atmospheric, Geophysical and Astronomical Services Administration assign names to tropical cyclones that develop in the Western Pacific, which can result in a tropical cyclone having two names. The Japan Meteorological Agency's RSMC Tokyo — Typhoon Center assigns international names to tropical cyclones on behalf of the World Meteorological Organization's Typhoon Committee, should they be judged to have 10-minute sustained windspeeds of . While the Philippine Atmospheric, Geophysical and Astronomical Services Administration assigns names to tropical cyclones which move into or form as a tropical depression in their area of responsibility located between 135°E and 115°E and between 5°N-25°N even if the cyclone has had an international name assigned to it. while the name Vamei was retired, and was replaced with Peipah. Philippines The Philippine Atmospheric, Geophysical and Astronomical Services Administration uses its own naming scheme for tropical cyclones in their area of responsibility. PAGASA assigns names to tropical depressions that form within their area of responsibility and any tropical cyclone that might move into their area of responsibility. Should the list of names for a given year prove to be insufficient, names are taken from an auxiliary list, the first 10 of which are published each year before the season starts. Starting in 2001, new sets of names are implemented. Most of these names in the list were used for the first time (and only, in the cases of Barok, Darna, Nanang, and Pabling), except for the names Auring, Huaning, Isang, and Maring, which were taken from the old list. The name Yaning was also taken from the old list. Names that were not assigned are marked in . Retirement The name Vamei was retired by the ESCAP/WMO Typhoon Committee. The name Peipah was chosen to replace Vamei. The name Nanang was retired by PAGASA and was replaced by Nando for 2005. Along with Nanang, PAGASA unofficially retired the names Barok, Darna, Pabling, Roleta, Sibak, Talahib, Ubbeng, Yaning, Zuma, Ekis, Fuerza, Gimbal, Hampas and Juego, and replaced them with Bising, Dante, Pepeng, Ramil, Santi, Tino, Urduja, Yolanda, Zoraida, Ernie, Florante, Gerardo, Hernan and Jerome for future seasons. ==Season effects==
Season effects
This table lists all the storms that developed in the western Pacific Ocean to the west of the International Date Line during the 2001 season. It includes their intensity, duration, name, landfalls, deaths, and damages. All damage figures are in 2001 USD. Damages and deaths from a storm include when the storm was a precursor wave or extratropical low. ==See also==
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