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2018 Pacific typhoon season

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2018 Pacific typhoon season
2018 Pacific typhoon season summary.png
Season summary map
Seasonal boundaries
First system formed December 29, 2017
Last system dissipated Season ongoing
Strongest storm
Name Jelawat and Maria
 • Maximum winds 195 km/h (120 mph)
(10-minute sustained)
 • Lowest pressure 915 hPa (mbar)
Seasonal statistics
Total depressions 27 official, 1 unofficial
Total storms 20 official, 1 unofficial
Typhoons 6
Super typhoons 2 (unofficial)
Total fatalities 128 total
Total damage $1.62 billion (2018 USD)
Related articles
Pacific typhoon seasons
2016, 2017, 2018, 2019, 2020

The 2018 Pacific typhoon season is an ongoing event in the annual cycle of tropical cyclone formation, in which tropical cyclones form in the western Pacific Ocean. The season runs throughout 2018, though most tropical cyclones typically develop between May and October. The season's first named storm, Bolaven, developed on January 3. The season's first typhoon, Jelawat, reached typhoon status on March 29, and became the first super typhoon of the year on the next day.

The scope of this article is limited to the Pacific Ocean, to the north of the equator between 100°E and the 180th meridian. Within the northwestern Pacific Ocean, there are two separate agencies that assign names to tropical cyclones, which can often result in a cyclone having two names, one from the JMA and one from PAGASA. The Japan Meteorological Agency (JMA) will name a tropical cyclone should it be judged to have 10-minute sustained wind speeds of at least 65 km/h (40 mph) anywhere in the basin, while the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) 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 regardless of whether or not a tropical cyclone has already been given a name by the JMA. Tropical depressions that are monitored by the United States' Joint Typhoon Warning Center (JTWC) are given a number with a "W" suffix.

Seasonal forecasts

TSR forecasts
Date
Tropical
storms
Total
Typhoons
Intense
TCs
ACE Ref
Average (1965–2017) 26 16 9 294 [1]
May 11, 2018 27 17 9 307 [1]
July 6, 2018 27 17 10 331 [2]
August 7, 2018 27 17 9 319 [3]
Other forecasts
Date
Forecast
Center
Period Systems Ref
January 15, 2018 PAGASA January — March 1–3 tropical cyclones [4]
January 15, 2018 PAGASA April — June 2–4 tropical cyclones [4]
March 15, 2018 VNCHMF January – December 12-13 tropical cyclones [5]
March 23, 2018 HKO January – December 5-8 tropical cyclones [6]
July 13, 2018 PAGASA July — September 6–8 tropical cyclones [7]
July 13, 2018 PAGASA October — December 4–6 tropical cyclones [7]
2018 season Forecast
Center
Tropical
cyclones
Tropical
storms
Typhoons Ref
Actual activity: JMA 27 20 6
Actual activity: JTWC 24 21 8
Actual activity: PAGASA 11 9 1

During the year several national meteorological services and scientific agencies forecast how many tropical cyclones, tropical storms, and typhoons will form during a season and/or how many tropical cyclones will affect a particular country. These agencies included the Tropical Storm Risk (TSR) Consortium of University College London, PAGASA and Taiwan's Central Weather Bureau. The first forecast of the year was released by PAGASA during January 15, within its seasonal climate outlook for the period January – June.[4] The outlook noted that one to three tropical cyclones were expected between January and March, while two to four were expected to develop or enter the Philippine Area of Responsibility between April and June.[4] PAGASA also mentioned that the La Niña would be short-lived, predicting that it would last until February or April.[4]

On March 15, the Vietnamese National Center for Hydro Meteorological forecasts (VNCHMF) predicted that roughly twelve to thirteen tropical cyclones would affect Vietnam during 2018, which is above average.[5] On March 23, the Hong Kong Observatory predicted that five to eight tropical cyclones would come within 500 kilometres of Hong Kong, which is normal to above normal, with the first tropical cyclone affecting Hong Kong in June or earlier.[6] On May 11, the Tropical Storm Risk (TSR) issued their first forecast for the season, predicting that the 2018 season would be a slightly above average season producing 27 named storms, 17 typhoons, and nine intense typhoons.[1] The TSR released their second forecast on July 6, still predicting that the season will be an above average with the only changes to their forecast is increasing the number of intense typhoons from 9 to 10.[2] The PAGASA issued their second and final outlook on July 13, predicting for the period of July – December, where six to eight tropical cyclones were expected to develop or entered their area of responsibility between July and September, while four to six were forecast during October to December. On August 7, TSR released their final forecast, with its only changes decreasing the numbers of intense typhoons from 10 to 9 as well as its ACE to 319 units.[3]

Season summary

Hurricane Hector (2018) Typhoon Jongdari (2018) Tropical Storm Son-Tinh (2018) Typhoon Maria (2018) Tropical Storm Ewiniar (2018) Tropical Storm Bolaven (2018)

2018 opened with Tropical Depression Agaton active to the east of the Philippines. Over the course of two days, the system moved over to the South China Sea and intensified into the first named storm, Bolaven. A month later, Tropical Storm Sanba developed and affected the southern Philippines. About another month later, Tropical Depression 03W formed in the open Pacific and was named Jelawat. Jelawat intensified into the season's first typhoon on March 30, and then the season's first super typhoon. Tropical activity fired up by June, when a series of storms developed, with Tropical Storm Ewiniar making landfall over mainland China. Later that month, Typhoon Prapiroon developed and affected the Korean Peninsula, the first since 2013. Thereafter, Typhoon Maria developed and reached its peak intensity as a Category 5 super typhoon, being the first typhoon to reach that intensity since Typhoon Nock-ten in 2016. Besides, Hurricane Hector crossed the International Date Line, the first to do so since Genevieve in 2014.

Systems

Tropical Storm Bolaven (Agaton)

Tropical storm (JMA)
Tropical depression (SSHWS)
Bolaven 2018-01-03 0615Z.jpg Bolaven 2018 track.png
Duration December 29, 2017 – January 4, 2018
Peak intensity 65 km/h (40 mph) (10-min)  1002 hPa (mbar)

A low-pressure area developed into a tropical depression northeast of Palau early on December 30, 2017.[8] The system moved generally westward and on the first day of 2018, the PAGASA began issuing advisories on the system and locally named it Agaton.[9] Both the JMA and the JTWC followed suit, with the latter designating the system as 01W.[10] By January 3, the system had intensified into a tropical storm according to the JMA and was named Bolaven, thus becoming the first named storm of the season. However, several hours later, Bolaven started to weaken and rapidly deteriorate.[11] The system was last tracked by the JMA to the east of Vietnam on January 4.

The impact caused by Bolaven (Agaton) was moderate but not as significant as the previous two systems, Kai-tak and Tembin, with about 2,000 passengers stranded in ports in the Visayas.[12] As of July 5, three people have been reported killed by the storm, while total damages were up to 554.7 million pesos (US$10.9 million).[13]

Tropical Storm Sanba (Basyang)

Tropical storm (JMA)
Tropical storm (SSHWS)
Sanba 2018-02-12 0510Z.jpg Sanba 2018 track.png
Duration February 8 – February 16
Peak intensity 65 km/h (40 mph) (10-min)  1000 hPa (mbar)

A low-pressure system developed into a tropical depression north of Chuuk early on February 8. It developed into a tropical storm on February 11, receiving the international name Sanba by the JMA. Shortly afterwards, Sanba entered the Philippine area of responsibility and received the name Basyang by PAGASA.[14] On February 13, Sanba made landfall in Cortes, Philippines,[15] causing it to weaken to a tropical depression. The next day, the system weakened into a remnant low as it made another landfall in Surigao del Sur.[16]

Approximately 17,000 people were affected by the storm and there were 14 fatalities. Total damages were at PHP 167.955 million (US$3.2 million).[17]

Typhoon Jelawat (Caloy)

Typhoon (JMA)
Category 4 super typhoon (SSHWS)
Jelawat 2018-03-30 0550Z.png Jelawat 2018 track.png
Duration March 24 – April 1
Peak intensity 195 km/h (120 mph) (10-min)  915 hPa (mbar)

On March 24, a tropical depression formed to the south of the Mariana Islands,[18] and the JTWC assigned it the numerical identifier 03W.[19] On March 25, the system intensified into a tropical storm and was named Jelawat by the JMA.[20] Due to strong southwesterly wind shear, the cyclone remained poorly organized, with disorganized convection near an exposed low-level circulation.[21] Conditions gradually became more favorable for further development, resulting in Jelawat steadily strengthening and organization to a severe tropical storm at 18:00 UTC on March 28.[22] Later on March 29, an eye began to emerge within a growing central dense overcast, leading to the JMA classifying it as a typhoon at 00:00 UTC on March 29.[23] Explosive intensification then ensued over the following 36 hours as the eye became sharply defined, and Jelawat attained its peak intensity later that morning, with estimated 10-minute sustained winds of 195 km/h (120 mph) and a central pressure of 915 hPa (27.02 inHg).[24] At the same time, the JTWC assessed it as peaking with 1-minute sustained winds of 240 km/h (150 mph), making it a Category 4 super typhoon.[25]

Immediately after peaking in intensity, Jelawat began weakening rapidly, due to a sharp increase in wind shear and dry air, and the storm fell below typhoon strength late on March 31. During the next couple of days, Jelawat drifted to the northeast, and then turned eastward, before dissipating on April 1.

The storm brought minor impacts to Palau, the Caroline Islands, and the Northern Mariana Islands.

Tropical Depression 04W

Tropical depression (JMA)
Tropical storm (SSHWS)
04W 2018-05-12 0345Z.jpg 04W 2018 track.png
Duration May 10 – May 15
Peak intensity <55 km/h (35 mph) (10-min)  1008 hPa (mbar)

A low-pressure area east of Mariana Islands was upgraded to a tropical depression by the JMA late on May 10,[26] shortly before the JTWC issued a TCFA.[27] By May 12, deep convection was observed near its center as the JTWC began issuing advisories on the system giving the designation 04W.[28] Roughly twelve hours later, it was reported that 04W had intensified into a tropical storm by the JTWC after satellite imagery had depicted on a well-defined center.[29] Tracking in a course of a west-northwesterly direction, the system began to weaken as it started entering in an area of unfavorable conditions.[30] Therefore, 04W rapidly weakened as the JTWC issued their final advisory on the system early on May 14, as the system showed a very elongated and exposed center, due to very strong wind shear.[31] The JMA, however, tracked the system until early on May 15, when it finally dissipated.[32]

Tropical Storm Ewiniar

Tropical storm (JMA)
Tropical storm (SSHWS)
Ewiniar 2018-06-06 0525Z.jpg Ewiniar 2018 track.png
Duration June 2 – June 9
Peak intensity 75 km/h (45 mph) (10-min)  998 hPa (mbar)

A low-pressure area developed into a tropical depression over the South China Sea on June 2.[33][34] Later that day the JTWC followed suit and designated the system as 05W.[35] 05W meandered in a westward direction until it curved northward and after three days, the JTWC upgraded the system to a tropical storm.[36] The JMA did the same three hours later early on June 6, naming it Ewiniar.[37] Shortly thereafter, Ewiniar made landfall over South China. Ewiniar maintained its intensity while over land until the JTWC issued its final advisory late on June 7.[38] The JMA, however, tracked the system until early on June 9, when Ewiniar had weakened into a tropical depression and degenerated into a remnant low.[39] However, Ewiniar's remnant moved out to sea and continued to persist, before dissipating on June 13.

8 people were killed in China, while total economic losses were estimated at CN¥3.67 billion (US$573 million).[40]

Severe Tropical Storm Maliksi (Domeng)

Severe tropical storm (JMA)
Tropical storm (SSHWS)
Maliksi 2018-06-10 0140Z.jpg Maliksi 2018 track.png
Duration June 3 – June 11
Peak intensity 110 km/h (70 mph) (10-min)  970 hPa (mbar)

A low-pressure area northwest of Palau developed into a tropical depression late on June 3.[41] On the next day, the system received the name Domeng from PAGASA, while the JTWC issued a TCFA for the system.[42][43] After the system had consolidated further, the JMA finally upgraded the system to a tropical storm, naming it Maliksi.[41] The JTWC, however, didn't tracked the system until 03:00 UTC of June 8 when it also gave the designation 06W.[44] Moving northward, Maliksi continued to intensify until it reached its peak strength early on June 10 with winds of 110 km/h (70 mph), just shy of typhoon intensity, and a minimum pressure of 970 hPa.[41][45] Operationally, the JMA briefly classified Maliksi to a typhoon, but was downgraded to a severe tropical storm in post-analysis.[46] Afterwards, Maliksi began to weaken as it begins its extratropical transition. Encounting unfavorable environments by June 11, both agencies immediately stopped warning on the system as the system's center became exposed as the system was declared as an extratropical cyclone.[41][47] The JMA had tracked the remnants of Maliksi until 00:00 UTC of June 13.[41]

Despite not making landfall in the Philippines, Maliksi prompted the PAGASA to declare the official start of the rainy season on June 8, 2018. Two people were killed by heavy monsoonal rains, enhanced by Maliksi, in the Philippines.[48]

Tropical Storm 07W

Tropical storm (SSHWS)
07W 2018-06-13 0525Z.jpg 07W 2018 track.png
Duration June 13 – June 15
Peak intensity 65 km/h (40 mph) (1-min)  993 hPa (mbar)

A disturbance formed southwest of Taiwan on June 12, just within the meiyu front, and the JTWC indicated a subtropical depression subsequently.[49] By 21:00 UTC of June 13, the JTWC issued its first advisory on the system, designating it as 07W, and was classified as a tropical depression.[50] Despite located in a moderately to a severely sheared environment, the system was located over in relatively warm sea-surface temperatures with patches of convection, and this prompted the JTWC to upgrade 07W to a tropical storm.[51] The JTWC later issued their fourth but final advisory on 07W on 15:00 UTC of June 14, when the system was rapidly undergoing a phase of extratropical transition as the system was losing its structure rapidly.[52] 07W fully became an extratropical cyclone just to the south of mainland Japan on 06:00 UTC of June 15, although its remnant was still tracked until June 25, when the system was last located near the coast of British Columbia.[49]

Tropical Storm Gaemi (Ester)

Tropical storm (JMA)
Tropical storm (SSHWS)
Gaemi 2018-06-16 0450Z.jpg Gaemi 2018 track.png
Duration June 13 – June 16
Peak intensity 85 km/h (50 mph) (10-min)  990 hPa (mbar)

On June 13, a tropical depression formed on the South China Sea, from Tropical Storm 07W's trough. On June 14, the PAGASA announced it had entered the Philippine Area of Responsibility, assigning the name Ester. Tropical Depression Ester (08W) made landfall by Midnight, intensifying into a Tropical Storm, it was named Gaemi. On June 16, Gaemi became extratropical. On June 19, the NDRRMC reported that 3 people had died from monsoonal rains enhanced by Gaemi.[53]

Typhoon Prapiroon (Florita)

Typhoon (JMA)
Category 1 typhoon (SSHWS)
Prapiroon 2018-07-02 0000Z.png Prapiroon 2018 track.png
Duration June 28 – July 4
Peak intensity 120 km/h (75 mph) (10-min)  960 hPa (mbar)

A low-pressure area west of Okinotorishima developed into a tropical depression on June 28. On the next day, PAGASA began issuing advories, giving the name Florita. 6 hours later, Florita became a tropical storm, with JMA assigning Prapiroon for the international name. On June 30, Prapiroon began to intensify into a tropical storm. By July 2, Prapiroon became a Category 1 Typhoon, nearing Japan and Korea. By July 3, Typhoon Prapiroon had peak intensity. On the same day, Prapiroon made landfall on Japan. After landfall, Prapiroon briefly weakened to a tropical storm. Prapiroon became a low-pressure area on the next day, though the JMA still tracked its remnants were still tracked until July 10, when it finally dissipated. [54][55]

As of July 2018, only 1 person was killed by the storm, who was from South Korea.[56]

Typhoon Maria (Gardo)

Typhoon (JMA)
Category 5 super typhoon (SSHWS)
Maria 2018-07-08 0630Z.png Maria 2018 track.png
Duration July 3 – July 12
Peak intensity 195 km/h (120 mph) (10-min)  915 hPa (mbar)

A tropical depression formed on July 3. On the next day, the system intensified into Tropical Storm Maria. Early on July 5, Maria intensified into a severe tropical storm, while the JTWC classified the system as a Category 1 typhoon. Explosive intensification ensued, and later that day, Maria became a super typhoon and the first Category 5-equivalent storm of this basin since Nock-ten in 2016. Shortly afterwards, Maria underwent an eyewall replacement cycle, and it weakened below super typhoon status the following day. By July 8, however, Maria had completed the eyewall replacement cycle and regained Category 5-equivalent intensity.

Tropical Storm Son-Tinh (Henry)

Tropical storm (JMA)
Tropical storm (SSHWS)
Son-Tinh 2018-07-18.jpg Son-Tinh 2018 track.png
Duration July 15 – July 24[nb 1]
Peak intensity 75 km/h (45 mph) (10-min)  994 hPa (mbar)

An area of low-pressure strengthened into a tropical depression on July 15, to the northwest of Manila, Philippines.[57] The JTWC designated it as 11W while the PAGASA named it Henry.[57] As the system moved in a fast westward direction, the system gradually intensified and was declared a tropical storm by July 17, with the JMA naming it as Son-Tinh as its convective structure improved.[58] Although from thereafter, Son-Tinh slightly weakened as it neared Hainan island while experiencing moderate shear.[59] During the next day, however, Son-Tinh slightly intensified over in the Gulf of Tonkin due to warm sea-surface temperatures before it made landfall in northern Vietnam.[60] Both agencies issued their final warning on Son-Tinh on July 19 as the system had weakened back into an area of low-pressure embedded by the monsoon.[61] However, the JTWC continued to track the system's remnant low for another two days, before it finally dissipated.[62]

Severe Tropical Storm Ampil (Inday)

Severe tropical storm (JMA)
Tropical storm (SSHWS)
Ampil 2018-07-21 0445Z.jpg Ampil 2018 track.png
Duration July 17 – July 24
Peak intensity 95 km/h (60 mph) (10-min)  985 hPa (mbar)

On July 17, a weak tropical depression had developed over in the Philippine Sea. With some deep convection and the system located in favorable environments, the JTWC began tracking on the system, designating it as 12W.[63] By the next day, the PAGASA followed suit and was locally named as Inday. By 12:00 UTC of July 18, the system had intensified into a tropical storm and was named Ampil.[64] As Ampil moved in a northward direction, the system's structure had broadened along with sustained deep convection.[65] Despite an unfavorable ocean heat content, Ampil still remained over relatively warm sea-surfaces temperatures with the inclusion of an extensive deep convection,[66] therefore Ampil was classified as a severe tropical storm. With an improved convective system, the JTWC assessed that Ampil had reached 1-minute peak winds of 95 km/h (60 mph).[67] Ampil reached its peak intensity with a minimum pressure of 985 hPa and maintained that intensity for the next few days, despite with the change of direction. On July 21, the system's center became exposed as the system slightly weakened.[68] By the next day, the JMA downgraded Ampil back to a tropical storm, as the system made landfall over China with a lack of convection.[69] Ampil weakened further to a tropical depression on July 23, and both agencies issued their final advisory on the system.[70] The JMA continued tracking the system until it weakened into an area of low pressure, at 18:00 UTC on July 24.[71]

Heavy rain in Shandong Province—accumulating to 237 mm (9.3 in) in Tianjin—caused significant flooding, inundating 31,600 hectares of crops and affecting 260,000 people. One person was killed in China and total economic losses reached ¥1.19 billion (US$175.2 million).[72]

Tropical Depression 13W (Josie)

Tropical depression (JMA)
Tropical depression (SSHWS)
Josie 2018-07-22 0220Z.jpg 13W 2018 track.png
Duration July 20 – July 23
Peak intensity 55 km/h (35 mph) (10-min)  996 hPa (mbar)

Since the formation of the previous two systems, the southwest monsoon had been extremely active in the Philippines. By August 1, a total of 16 people had been killed due to extreme flooding, while damages have been recorded at 4.66 billion (US$87.7 million).[73]

Severe Tropical Storm Wukong

Severe tropical storm (JMA)
Category 1 typhoon (SSHWS)
Wukong 2018-07-25.jpg Wukong 2018 track.png
Duration July 22 – July 26
Peak intensity 95 km/h (60 mph) (10-min)  990 hPa (mbar)

Late on July 21, the JTWC began to issue advisories on Tropical Depression 14W that had developed about 603 km (381 mi) east-southeast of the Japanese island of Minami-Tori-shima.[74] The JMA, however, began tracking the system until the early hours of July 22. Later that day, the JTWC upgraded 14W to a tropical storm, despite the fact that convection had been sheared and the system was located in unfavorable southwesterly shear.[75] Within the next 24 hours, 14W began to organize with deep convection obscuring its LLCC,[76] and on 12:00 UTC of July 23, the JMA upgraded the system to a tropical storm, naming it Wukong. Moving poleward, Wukong gradually intensified while entering in an area of favorable environment with lesser shear and on 00:00 UTC of July 25, the JMA upgraded Wukong to a severe tropical storm. Nine hours later, the JTWC upgraded Wukong to a Category 1 typhoon after satellite images depicted a 30-nmi ragged eye.[77] Though by July 26, both the JMA and the JTWC issued their final advisory on Wukong as the system had rapidly transitioned into an extratropical cyclone.[78] Wukong's extratropical remnants was tracked until late on July 27 when it was last noticed off the eastern coast of Russia Far East.[79]

Typhoon Jongdari

Typhoon (JMA)
Category 2 typhoon (SSHWS)
Jongdari 2018-07-28 0324Z.jpg Jongdari 2018 track.png
Duration July 23 – August 4
Peak intensity 140 km/h (85 mph) (10-min)  965 hPa (mbar)

Tropical Depression 16W

Tropical depression (JMA)
Tropical depression (SSHWS)
16W 2018-07-31.jpg 16W 2018 track.png
Duration July 31 – August 2
Peak intensity 55 km/h (35 mph) (10-min)  1000 hPa (mbar)

A tropical disturbance developed about 807 km (503 mi) north-northeast of Iwo To by July 29.[80] The JTWC upgraded the system to Tropical Depression 16W during the next day after its convective structure had slightly improved despite the system located in moderate to strong wind shear.[81] By July 31, the JMA followed suit on classifying the system as a tropical depression.[82] 16W's center late became exposed with deep convection displaced due to continued shear.[83] By July 31, the JMA followed suit on classifying the system as a tropical depression.[84] Originally, the system was forecast to reach tropical storm intensity with only 35 knot winds,[85] but the system's center had become asymmetric with a fully sheared center.[86] The JTWC issued their final advisory on 21:00 UTC of the same day, after 16W had fully transitioned into a subtropical cyclone, though both agencies continued to track the system until August 2.[87][88]

Typhoon Shanshan

Typhoon (JMA)
Category 2 typhoon (SSHWS)
Shanshan 2018-08-07 0336Z.jpg Shanshan 2018 track.png
Duration August 2 – August 10
Peak intensity 130 km/h (80 mph) (10-min)  970 hPa (mbar)

A tropical depression had developed to the east-northeast of Guam on August 2. On 21:00 UTC of the same day, the JTWC began tracking the system, giving the identifier 17W.[89] 17W intensified into a tropical storm on August 3, with the JMA naming it as Shanshan.[90] The storm was located over in favorable environments as the system was gradually consolidating,[91] therefore Shanshan intensified into a severe tropical storm. During the next day, both the JMA and JTWC upgraded Shanshan to a typhoon after deep convection was seen wrapping into its developing center. The JMA later analysed that the storm had reached 10-minute winds of 130 km/h (80 mph) and a minimum pressure of 970 hPa, and remain that intensity for several days. Though the JTWC stated that Shanshan had slightly weakened after a strengthening trend by August 6 after its eye became ragged and slightly displaced. However on August 7, Shanshan began to re-intensify and reached its peak strength as a Category 2 typhoon with 1-minute winds of 165 km/h (105 mph) while nearing the coast of southeastern Japan. Thereafter, Shanshan began to change its course towards the east as it rapidly weakened. The JTWC issued their final advisory on August 9, though the JMA tracked the system until it became extratropical at 06:00 UTC on August 10.

Tropical Storm Yagi (Karding)

Tropical storm (JMA)
Tropical storm (SSHWS)
Yagi 2018-08-10 0420Z.jpg Yagi 2018 track.png
Duration August 6 – August 15
Peak intensity 75 km/h (45 mph) (10-min)  990 hPa (mbar)

A tropical disturbance had persisted towards the southwest of Iwo To on August 1.[92] After the course of five days, the system finally strengthened into a tropical depression by the JMA, with the JTWC following suit several hours later.[93] The PAGASA also began issuing bulletins to the system, locally assigning the name Karding. Karding maintained its intensity as a tropical depression due to moderate to strong easterly shear, despite persistent convection surrounding the system.[94] By August 8, a METOP-A ASCAT image showed that the system had winds of 35 knots, hence the JTWC upgrading it to a tropical storm.[95] The JMA around the same time did the same, naming it Yagi. Within the next day, Yagi curved towards the northwest while continuously battling shear as it struggled to intensify. Though by 12:00 UTC of August 11, the JMA considered that Yagi reached its peak strength with 10-minute winds of 75 km/h (45 mph) and a minimum pressure of 990 hPa.

The JTWC declared that Yagi reached winds of 85 km/h (50 mph) on 12:00 UTC of August 12 after the storm had consolidated further with an improved structure.[96] Yagi made landfall shortly thereafter over Wenling, in Taizhou of Zhejiang, China, at around 23:35 CST (15:35 UTC) on August 12.[97] By 21:00 UTC of that day, the JTWC issued their final advisory on Yagi,[98] but continued to track it until it weakened further into a tropical depression early on August 13.[99] The JMA did the same on 06:00 UTC of August 13, but continued to tracked it until it became an extratropical system on August 15.

Despite Yagi (Karding) didn't make landfall in the Philippines, the storm enhanced the southwest monsoon which brought extreme flooding towards many regions within the country. According to the NDRRMC, two people died along with Php57.9 million (US$1.09 million) worth of damages, as of August 18.[100]

Severe Tropical Storm Bebinca

Severe tropical storm (JMA)
Tropical storm (SSHWS)
Bebinca 2018-08-16 Suomi NPP.jpg Bebinca 2018 track.png
Duration August 9 – August 17
Peak intensity 95 km/h (60 mph) (10-min)  980 hPa (mbar)

On August 9, a tropical depression formed within the South China Sea, and slowly began to drift towards the northwest. On August 10, this tropical depression brought heavy rains and and flooding to Haikou, Hainan.

Severe Tropical Storm Leepi

Severe tropical storm (JMA)
Category 1 typhoon (SSHWS)
Leepi 2018-08-13 Suomi NPP.jpg Leepi 2018 track.png
Duration August 11 – August 15
Peak intensity 95 km/h (60 mph) (10-min)  994 hPa (mbar)

Shortly before 03:00 JST (18:00 UTC) on August 15, Leepi made landfall over Hyūga, Miyazaki in Japan.[101] Leepi dissipated on August 16, after the system was last tracked east of South Korea as a remnant low.

Tropical Storm Hector

Tropical storm (JMA)
Tropical storm (SSHWS)
Hector 2018-08-14.jpg Hector 2018 track.png
Duration August 13 (Entered basin) – August 16
Peak intensity 75 km/h (45 mph) (10-min)  998 hPa (mbar)

On 18:00 UTC of August 13, both the JMA and the JTWC declared that Tropical Storm Hector from the East Pacific basin had crossed the International Dateline and entered the West Pacific basin.[102] At this point, Hector was still located in favorable environments with only moderate shear, though deep convection was limited as it only persisted just near its center.[103] Although because an upper tropospheric trough cell (TUTT) was just located to the west of Hector, the storm failed to intensify and began to weaken.[104] The JTWC downgraded Hector to a tropical depression after the system rapidly entered an area of high vertical wind shear.[105] By the early hours of August 15, both agencies issued their final warning on Hector, mentioning that Hector's LLCC had become elongated and had already transitioned into a subtropical cyclone.[106] The JMA, however, still monitored on the system until 18:00 UTC of August 16.

Tropical Storm Rumbia

Tropical storm (JMA)
Tropical storm (SSHWS)
Rumbia 2018-08-15 Suomi NPP.jpg Rumbia 2018 track.png
Duration August 14 – Present
Peak intensity 85 km/h (50 mph) (10-min)  985 hPa (mbar)

On August 15, a tropical depression in the East China Sea strengthened into Tropical Storm Rumbia. Shortly after reaching peak intensity over the Hangzhou Bay on August 16, Rumbia made landfall over Pudong New Area, Shanghai, China at around 04:05 CST on August 17 (20:05 UTC), becoming the third tropical storm to hit Shanghai in 2018.[107]

Typhoon Soulik

Soulik TY
Current storm status
Typhoon  (JMA)
Current storm status
Category 3 typhoon (1-min mean)
Soulik 2018-08-18 0328Z.jpg
Satellite image
JTWC wp2218.gif
Forecast map
As of: 00:00 UTC, August 19
Location: 25°06′N 139°00′E / 25.1°N 139.0°E / 25.1; 139.0 (Soulik)
About 687 nmi (1,272 km; 791 mi) SE of Sasebo, Japan
Sustained winds: 150 km/h (90 mph) (10-min mean)
185 km/h (115 mph) (1-min mean)
gusting to 215 km/h (130 mph)
Pressure: 955 hPa (mbar; 28.20 inHg)
Movement: WNW at 6 kn (11 km/h; 6.9 mph)
See more detailed information.

A low-pressure area in the Philippine Sea organized into a tropical depression late on August 15. The JTWC followed suit at 00:00 UTC at August 16 and was designated as 22W. Later on that day, the JMA followed suit and 22W was given the international name Soulik. On August 17, JMA upgraded Soulik to a typhoon, makrking the sixth typhoon of the season.

Current storm information

As of 00:00 UTC on August 18, Typhoon Soulik is located near 25°06′N 139°00′E / 25.1°N 139.0°E / 25.1; 139.0 (Soulik), or 687 nmi (1,272 km; 791 mi) southeast of Sasebo, Japan. 10-minute sustained winds are at 150 km/h (90 mph); 1-minute sustained winds are at 185 km/h (115 mph), with gusts of up to 215 km/h (130 mph). The minimum barometric pressure is at 955 hectopascals (28.20 inHg), and the system is moving west-northwestward at 6 kn (11 km/h; 6.9 mph).

For the latest official information, see:

  • JMA's Tropical Cyclone Warning Text on Typhoon 1819 (Soulik)
  • JTWC's Tropical Cyclone Warning Text on Typhoon 22W (Soulik)

Tropical Storm Cimaron

Cimaron TS
Current storm status
Tropical storm  (JMA)
Current storm status
Tropical storm (1-min mean)
23W 2018-08-18 0027Z.jpg
Satellite image
JTWC wp2318.gif
Forecast map
As of: 00:00 UTC, August 19
Location: 15°00′N 152°36′E / 15.0°N 152.6°E / 15.0; 152.6 (Cimaron)
About 365 nmi (676 km; 420 mi) E of Saipan
Sustained winds: 65 km/h (40 mph) (10-min mean)
75 km/h (45 mph) (1-min mean)
gusting to 95 km/h (60 mph)
Pressure: 1000 hPa (mbar; 29.53 inHg)
Movement: NW at 12 kn (22 km/h; 14 mph)
See more detailed information.

On August 16, a tropical depression formed near the Marshall Islands. The system then began to move westward.

Current storm information

As of 00:00 UTC on August 19, Tropical Storm Cimaron is located near 15°00′N 152°36′E / 15.0°N 152.6°E / 15.0; 152.6 (Cimaron), or 365 nmi (676 km; 420 mi) east of Saipan. 10-minute sustained winds are at 65 km/h (40 mph); 1-minute sustained winds are at 75 km/h (45 mph), with gusts of up to 95 km/h (60 mph). The minimum barometric pressure is at 1,000 hectopascals (29.53 inHg), and the system is moving northwestward at 12 kn (22 km/h; 14 mph).

For the latest official information, see:

  • JMA's Tropical Cyclone Warning Text on Tropical Storm 1820 (Cimaron)
  • JTWC's Tropical Cyclone Warning Text on Tropical Storm 23W (Cimaron)

Other systems

On June 4, the JMA began tracking on a weak tropical depression that had formed northeast of Yap.[108] However, the system was absorbed by a nearby tropical depression, which would eventually become Severe Tropical Storm Maliksi on the next day.[42] After Gaemi became extratropical, a tropical depression formed south of Hong Kong early on June 17 and dissipated over the east coast of Guangdong, China one day later.[109][110] On July 16, a tropical depression developed over the South China Sea. The system remained weak and moved into Vietnam, before dissipating the next day.

On August 4, the JTWC began to track a subtropical storm that had developed just west of the International Dateline; the storm subsequently became extratropical on the next day.[111]

Storm names

Within the Northwest Pacific Ocean, both the Japan Meteorological Agency (JMA) and the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) assign names to tropical cyclones that develop in the Western Pacific, which can result in a tropical cyclone having two names.[112] 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 65 km/h (40 mph).[113] PAGASA 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 and 25°N even if the cyclone has had an international name assigned to it.[112] The names of significant tropical cyclones are retired, by both PAGASA and the Typhoon Committee.[113] Should the list of names for the Philippine region be exhausted then names will be taken from an auxiliary list of which the first ten are published each season. Unused names are marked in gray.

International names

A tropical cyclone is named when it is judged to have 10-minute sustained windspeeds of at least 65 km/h (40 mph).[114] The JMA selected the names from a list of 140 names, that had been developed by the 14 members nations and territories of the ESCAP/WMO Typhoon Committee.[115] The next 28 names on the naming list are listed here along with their international numeric designation, if they are used. During the season, the names Ampil and Jongdari were used for the first time, after they replaced the names Bopha and Sonamu, which were both retired after the 2012 and 2013 seasons respectively.

  • Bolaven (1801)
  • Sanba (1802)
  • Jelawat (1803)
  • Ewiniar (1804)
  • Maliksi (1805)
  • Gaemi (1806)
  • Prapiroon (1807)
  • Maria (1808)
  • Son-Tinh (1809)
  • Ampil (1810)
  • Wukong (1811)
  • Jongdari (1812)
  • Shanshan (1813)
  • Yagi (1814)
  • Leepi (1815)
  • Bebinca (1816)
  • Rumbia (1818)
  • Soulik (1819) (active)
  • Cimaron (1820) (active)
  • Jebi (unused)
  • Mangkhut (unused)
  • Barijat (unused)
  • Trami (unused)
  • Kong-rey (unused)
  • Yutu (unused)
  • Toraji (unused)
  • Man-yi (unused)
  • Usagi (unused)

The international numeric designation 1817 was applied to Hurricane Hector after it crossed the International Date Line; its name was assigned by the National Hurricane Center.

Philippines

PAGASA uses its own naming scheme to name tropical cyclones that either develop within or move into their self-defined area of responsibility.[116] The list of names for this season was last used during 2014 and are scheduled to be used again during 2022.[116] All of the names are the same except for Gardo, Josie, Maymay, Rosita and Samuel, which replaced the names Glenda, Jose, Mario, Ruby and Seniang after they were retired.[116] So far, the names Gardo and Josie were used for the first time.

  • Agaton (1801)
  • Basyang (1802)
  • Caloy (1803)
  • Domeng (1805)
  • Ester (1806)
  • Florita (1807)
  • Gardo (1808)
  • Henry (1809)
  • Inday (1810)
  • Josie
  • Karding (1814)
  • Luis (unused)
  • Maymay (unused)
  • Neneng (unused)
  • Ompong (unused)
  • Paeng (unused)
  • Queenie (unused)
  • Rosita (unused)
  • Samuel (unused)
  • Tomas (unused)
  • Usman (unused)
  • Venus (unused)
  • Waldo (unused)
  • Yayang (unused)
  • Zeny (unused)

Auxiliary list

  • Alakdan (unused)
  • Bagwis (unused)
  • Chito (unused)
  • Diego (unused)
  • Elena (unused)
  • Felino (unused)
  • Gunding (unused)
  • Harriet (unused)
  • Indang (unused)
  • Jessa (unused)

Season effects

This table summarizes all the systems that developed within or moved into the North Pacific Ocean, to the west of the International Date Line during 2018. The tables also provide an overview of a systems intensity, duration, land areas affected and any deaths or damages associated with the system.

Name Dates active Peak classification Sustained
wind speeds
Pressure Areas affected Damage
(USD)
Deaths Refs
Bolaven (Agaton) December 29, 2017 – January 4, 2018 Tropical storm 65 km/h (40 mph) 1002 hPa (29.59 inHg) Philippines, Vietnam $10.9 million 3 [13]
Sanba (Basyang) February 8 – 16 Tropical storm 65 km/h (40 mph) 1000 hPa (29.53 inHg) Caroline Islands, Philippines $3.2 million 14 [17]
Jelawat (Caloy) March 24 – April 1 Typhoon 195 km/h (120 mph) 915 hPa (27.02 inHg) Caroline Islands None None
04W May 10 – 15 Tropical depression Not specified 1008 hPa (29.77 inHg) None None None
Ewiniar June 2 – 9 Tropical storm 75 km/h (45 mph) 998 hPa (29.47 inHg) Vietnam, Philippines, South China, Taiwan, Ryukyu Islands $573 million 15 [40][117][118]
Maliksi (Domeng) June 3 – 11 Severe tropical storm 110 km/h (70 mph) 970 hPa (28.64 inHg) Ryukyu Islands, Philippines, Honshu Minimal 2 [48]
TD June 4 – 5 Tropical depression Not specified 1006 hPa (29.71 inHg) None None None
07W June 13 – 15 Tropical storm 65 km/h (40 mph)[nb 2] 993 hPa (29.32 inHg) Taiwan, Ryukyu Islands, British Columbia None None
Gaemi (Ester) June 13 – 16 Tropical storm 85 km/h (50 mph) 990 hPa (29.23 inHg) Taiwan, Ryukyu Islands Minimal 3 [53]
TD June 17 – 18 Tropical depression Not specified 1000 hPa (29.53 inHg) South China None None
Prapiroon (Florita) June 28 – July 4 Typhoon 120 km/h (75 mph) 960 hPa (28.35 inHg) Japan, Korean Peninsula $10 million 4 [56][119]
Maria (Gardo) July 3 – 12 Typhoon 215 km/h (130 mph) 915 hPa (27.02 inHg) Mariana Islands, Ryukyu Islands, Taiwan, East China $491 million 2 [120][121]
Son-Tinh (Henry) July 15 – 24[nb 1] Tropical storm 75 km/h (45 mph) 994 hPa (29.35 inHg) Philippines, South China, Vietnam, Laos, Thailand, Myanmar $235 million 66 [122][123][124]
[125][126][127]
[128][129][130]
TD July 16 – 17 Tropical depression Not specified 998 hPa (29.47 inHg) South China, Vietnam, Laos $14.8 million None [131]
Ampil (Inday) July 17 – 24 Severe tropical storm 95 km/h (60 mph) 985 hPa (29.09 inHg) Ryukyu Islands, China $175 million 1 [132]
13W (Josie) July 20 – 23 Tropical depression 55 km/h (35 mph) 996 hPa (29.41 inHg) Philippines, Taiwan, Ryukyu Islands, East China $87.7 million 16 [73]
Wukong July 22 – 26 Severe tropical storm 95 km/h (60 mph) 990 hPa (29.23 inHg) None None None
Jongdari July 23 – August 4 Typhoon 140 km/h (85 mph) 965 hPa (28.50 inHg) Japan, East China $100 million None [133]
16W July 31 – August 2 Tropical depression 55 km/h (35 mph) 1000 hPa (29.53 inHg) None None None
Shanshan August 2 – 10 Typhoon 130 km/h (80 mph) 970 hPa (28.64 inHg) Mariana Islands, Japan None None
Yagi (Karding) August 6 – 15 Tropical storm 75 km/h (45 mph) 990 hPa (29.23 inHg) Philippines, Ryukyu Islands, China $1.09 million 2 [100]
Bebinca August 9 – 17 Severe tropical storm 95 km/h (60 mph) 980 hPa (28.94 inHg) South China, Vietnam, Laos, Thailand, Myanmar Major 7 [134]
Leepi August 11 – 15 Severe tropical storm 95 km/h (60 mph) 994 hPa (29.35 inHg) Japan, South Korea None None
Hector August 13 – 16 Tropical storm 75 km/h (45 mph) 998 hPa (29.47 inHg) None None None
Rumbia August 14 – Present Tropical storm 85 km/h (50 mph) 985 hPa (29.09 inHg) Ryukyu Islands, East China None None
Soulik August 15 – Present Typhoon 150 km/h (90 mph) 955 hPa (28.20 inHg) Caroline Islands, Mariana Islands None None
Cimaron August 16 – Present Tropical storm 65 km/h (40 mph) 1000 hPa (29.53 inHg) Marshall Islands, Mariana Islands None None
Season aggregates
28 systems December 29, 2017 –
Season ongoing
215 km/h (130 mph) 915 hPa (27.02 inHg) $1.61 billion 135


See also

Notes

  1. ^ a b RSMC Tokyo reported that Son-Tinh dissipated late on July 19, and a new tropical depression presumed to be the remnants of Son-Tinh formed on July 21.
  2. ^ One-minute sustained winds; the JMA indicated the system as non-tropical.

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External links

  • Japan Meteorological Agency
  • China Meteorological Agency
  • Digital Typhoon
  • Hong Kong Observatory
  • Joint Typhoon Warning Center
  • Korea Meteorological Administration
  • National Weather Service Guam
  • Malaysian Meteorological Department
  • Philippine Atmospheric, Geophysical and Astronomical Services Administration
  • Taiwan Central Weather Bureau
  • TCWC Jakarta (in Indonesian)
  • Thai Meteorological Department (in Thai)
  • Typhoon2000
  • Vietnam's National Hydro-Meteorological Service
  • Tropical Storm Risk (TSR)'s website
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