2021 Pacific typhoon season

The 2021 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 2021, with no seasonal boundaries, though most tropical cyclones typically develop between May and October. 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) names 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 and 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.

2021 Pacific typhoon season
Season summary map
Seasonal boundaries
First system formedJanuary 19, 2021
Last system dissipatedSeason ongoing
Strongest storm
NameTD
 • Lowest pressure1008 hPa (mbar)
Seasonal statistics
Total depressions1
Total fatalities1 total
Total damage$10.8 million (2021 USD)
Related articles



Seasonal forecasts
Other forecasts
Date		Forecast
Center		PeriodSystemsRef.
December 27, 2020PAGASAJanuary–March0–3 tropical cyclones[1]
December 27, 2020PAGASAApril–June1–4 tropical cyclones[1]
2021 seasonForecast
Center		Tropical
cyclones		Tropical
storms		TyphoonsRef.
Actual activity:JMA100
Actual activity:JTWC000
Actual activity:PAGASA000

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 was released by PAGASA on December 27, 2020, in their monthly seasonal climate outlook predicting the first half of 2021.[1] The PAGASA predicts that only 0–3 tropical cyclones are expected to form or enter the Philippine Area of Responsibility between January and March, while 1–4 tropical cyclones are expected to form between April and June. PAGASA also predicted that the ongoing La Niña could persist until the end of the first quarter of 2021.[1]

Seasonal summary

Systems

Tropical Depression
Tropical depression (JMA)
 
DurationJanuary 19 – January 20
Peak intensity<55 km/h (35 mph) (10-min)  1008 hPa (mbar)

During January 19, the JMA reported that a tropical depression had developed to the east of Luzon, Philippines.[2] The precursor to the depression brought scattered showers and thunderstorms to Mindanao, Palawan, and Visayas on January 18.[3] The JMA, however, discontinued advisories for the system on the next day.[4]

The depression also brought stormy weather to Luzon on January 20. PAGASA warned residents of possible flash flooding and mudslides due to heavy rainfall.[5] The precursor of this system was associated from a frontal system, and its combined effects which brought heavy rainfall over much of Visayas, the Bicol Region, and Northern Mindanao resulted in one death and agricultural damages of up to ₱519.7 million (US$10.8 million).[6]

Storm names
See also: Tropical cyclone naming and History of tropical cyclone naming

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.[7] 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).[8] 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.[7] The names of significant tropical cyclones are retired, by both PAGASA and the Typhoon Committee.[8] 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
Main article: List of retired Pacific typhoon names

A tropical cyclone is named when it is judged to have 10-minute sustained windspeeds of 65 km/h (40 mph).[9] 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.[10] Retired names, if any, will be announced by the WMO in 2022; though replacement names will be announced in 2023. The next 28 names on the naming list are listed here along with their international numeric designation, if they are used.

  • Dujuan (unused)
  • Surigae (unused)
  • Choi-wan (unused)
  • Koguma (unused)
  • Champi (unused)
  • In-fa (unused)
  • Cempaka (unused)
  • Nepartak (unused)
  • Lupit (unused)
  • Mirinae (unused)
  • Nida (unused)
  • Omais (unused)
  • Conson (unused)
  • Chanthu (unused)
  • Dianmu (unused)
  • Mindulle (unused)
  • Lionrock (unused)
  • Kompasu (unused)
  • Namtheun (unused)
  • Malou (unused)
  • Nyatoh (unused)
  • Rai (unused)
  • Malakas (unused)
  • Megi (unused)
  • Chaba (unused)
  • Aere (unused)
  • Songda (unused)
  • Trases (unused)

Philippines
Main article: List of retired Philippine typhoon names

This season, PAGASA will use its own naming scheme, that will either develop within or move into their self-defined area of responsibility.[11] The names were taken from a list of names, that was last used during 2017 and are scheduled to be used again during 2025.[11] All of the names are the same except Uwan and Verbena which replaced the names Urduja and Vinta after they were retired.[11]

  • Auring (unused)
  • Bising (unused)
  • Crising (unused)
  • Dante (unused)
  • Emong (unused)
  • Fabian (unused)
  • Gorio (unused)
  • Huaning (unused)
  • Isang (unused)
  • Jolina (unused)
  • Kiko (unused)
  • Lannie (unused)
  • Maring (unused)
  • Nando (unused)
  • Odette (unused)
  • Paolo (unused)
  • Quedan (unused)
  • Ramil (unused)
  • Salome (unused)
  • Tino (unused)
  • Uwan (unused)
  • Verbena (unused)
  • Wilma (unused)
  • Yasmin (unused)
  • Zoraida (unused)

Auxiliary list

  • Alamid (unused)
  • Bruno (unused)
  • Conching (unused)
  • Dolor (unused)
  • Ernie (unused)
  • Florante (unused)
  • Gerardo (unused)
  • Hernan (unused)
  • Isko (unused)
  • Jerome (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 2021. 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
TDJanuary 19 – 20Tropical depressionNot specified1008 hPa (29.77 inHg)Philippines$10.8 million1[6]
Season aggregates
1 systemJanuary 19 – Season ongoing<55 km/h (<35 mph)1008 hPa (29.77 inHg)$10.8 million1

See also

References
  1. 131st Climate Forum Climate Outlook January–June 2021 (PDF) (Seasonal Climate Outlook). Philippine Atmospheric Geophysical and Astronomical Services Administration. December 27, 2020. Retrieved December 27, 2020.
  2. "WWJP27 RJTD 191800". Japan Meteorological Agency. 19 January 2021. Archived from the original on 20 January 2021. Retrieved 20 January 2021.
  3. Cristina Arayata (January 18, 2021). "LPA, ITCZ to bring scattered rains Monday". pna.gov.ph. Philippine News Agency. Retrieved January 20, 2021.
  4. "Warning and Summary 201200". Japan Meteorological Agency. January 20, 2021. Archived from the original on January 20, 2021. Retrieved January 20, 2021.
  5. Acor Arceo (January 20, 2021). "Parts of Luzon rainy due to LPA off Aurora, tail-end of frontal system". rappler.com. Rappler. Retrieved January 21, 2021.
  6. "SitRep no.09 re Prep. Measures and Effects for TEFS in Reg V, VI, VIII and X" (PDF). NDRRMC. January 20, 2021.
  7. Padgett, Gary. "Monthly Tropical Cyclone Summary December 1999". Australian Severe Weather. Archived from the original on August 28, 2012. Retrieved October 1, 2013.
  8. 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.
  9. http://www.typhooncommittee.org/48th/docs/item%204%20technical%20presentations/4.1.Review2015TyphoonSeason.pdf
  10. 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.
  11. "Philippine Tropical Cyclone Names". Philippine Atmospheric, Geophysical and Astronomical Services Administration. Archived from the original on January 30, 2021. Retrieved January 30, 2021.
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