2018 Pacific typhoon season

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2018 Pacific typhoon season
Bolaven 2018 track.png
Season summary map
Seasonal boundaries
First system formed December 30, 2017
Last system dissipated Season ongoing
Strongest storm
Name Bolaven
 • Maximum winds 65 km/h (40 mph)
(10-minute sustained)
 • Lowest pressure 1002 hPa (mbar)
Seasonal statistics
Total depressions 1
Total storms 1
Typhoons 0
Total fatalities 3 total
Total damage $197,000 (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 scope of this article is limited to the Pacific Ocean to the north of the equator between 100°E and 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. 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, whilst 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

Other forecasts
Period Systems Ref
January 15, 2018 PAGASA January — March 1–3 tropical cyclones [1]
January 15, 2018 PAGASA April — June 2–4 tropical cyclones [1]
2018 season Forecast
Typhoons Ref
Actual activity: JMA 1 1 0
Actual activity: JTWC 1 0 0
Actual activity: PAGASA 1 1 0

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.[1] 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.[1] PAGASA also mentioned that La Niña would be short-lived, that would be lasting until February or April.[1]

Season summary

Tropical Storm Bolaven (2018)

2018 opened with Tropical Depression Agaton active to the east of the Philippines. Over in the course of two days, the system moved over to the South China Sea and intensified into the first named storm, Bolaven.


Tropical Storm Bolaven (Agaton)

Tropical storm (JMA)
Tropical depression (SSHWS)
Bolaven 2018-01-03 0615Z.jpg Bolaven 2018 track.png
Duration December 30, 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.[2]

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.[3] 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).[4] 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.[3] The names of significant tropical cyclones are retired, by both PAGASA and the Typhoon Committee.[4] 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 65 km/h (40 mph).[5] 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.[6] The next 28 names on the naming list are listed here along with their international numeric designation, if they are used.

  • Bolaven (1801)
  • Sanba (unused)
  • Jelawat (unused)
  • Ewiniar (unused)
  • Maliksi (unused)
  • Gaemi (unused)
  • Prapiroon (unused)
  • Maria (unused)
  • Son-Tinh (unused)
  • Ampil (unused)
  • Wukong (unused)
  • Jongdari (unused)
  • Shanshan (unused)
  • Yagi (unused)
  • Leepi (unused)
  • Bebinca (unused)
  • Rumbia (unused)
  • Soulik (unused)
  • Cimaron (unused)
  • Jebi (unused)
  • Mangkhut (unused)
  • Barijat (unused)
  • Trami (unused)
  • Kong-rey (unused)
  • Yutu (unused)
  • Toraji (unused)
  • Man-yi (unused)
  • Usagi (unused)


PAGASA uses its own naming scheme to name tropical cyclones that either develop within or move into their self-defined area of responsibility.[7] The list of names for this season was last used during 2014 and are scheduled to be used again during 2022.[7] 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.[7]

  • Agaton (1801)
  • Basyang (unused)
  • Caloy (unused)
  • Domeng (unused)
  • Ester (unused)
  • Florita (unused)
  • Gardo (unused)
  • Henry (unused)
  • Inday (unused)
  • Josie (unused)
  • Karding (unused)
  • 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
Deaths Refs
Bolaven (Agaton) December 30, 2017 – January 4, 2018 Tropical storm 65 km/h (40 mph) 1002 hPa (29.59 inHg) Caroline Islands, Philippines, Central Vietnam $197 thousand 3 [8]
Season aggregates
1 system December 30, 2017 –
Season ongoing
65 km/h (40 mph) 1002 hPa (29.59 inHg) $197 thousand 3

See also



  1. ^ a b c d e Malano, Vicente B (January 15, 2018). January — June 2018 (Seasonal Climate Outlook). Philippine Atmospheric Geophysical and Astronomical Services Administration. Archived from the original on January 18, 2017. Retrieved January 18, 2017. 
  2. ^ "Marine Weather Warning for GMDSS Metarea XI 2017-12-30T06:00:00Z". WIS Portal – GISC Tokyo. Japan Meteorological Agency. December 30, 2017. Retrieved December 30, 2017. 
  3. ^ a b Padgett, Gary. "Monthly Tropical Cyclone Summary December 1999". Australian Severe Weather. Archived from the original on August 28, 2012. Retrieved October 1, 2013. 
  4. ^ a b The Typhoon Committee (February 21, 2013). "Typhoon Committee Operational Manual 2013". World Meteorological Organization. pp. 37–38. Archived from the original (PDF) on August 28, 2012. Retrieved October 1, 2013. 
  5. ^ http://www.typhooncommittee.org/48th/docs/item%204%20technical%20presentations/4.1.Review2015TyphoonSeason.pdf
  6. ^ Zhou, Xiao; Lei, Xiaotu (2012). "Summary of retired typhoons within the Western North Pacific Ocean". Tropical Cyclone Research and Review. The Economic and Social Commission for Asia and the Pacific/World Meteorological Organization's Typhoon Committee. 1 (1): 23–32. doi:10.6057/2012TCRR01.03. ISSN 2225-6032. Retrieved December 21, 2014. 
  7. ^ a b c "Philippine Tropical Cyclone Names". Philippine Atmospheric, Geophysical and Astronomical Services Administration. Retrieved April 18, 2015. 
  8. ^ "SitRep No. 12 re Preparedness Measures and Effects of Tropical Depression "AGATON"" (PDF). January 20, 2018. 

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
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