List of Western Pacific tropical depressions

A tropical depression is a tropical cyclone that reaches maximum sustained winds below 34 knots (39 mph; 63 km/h). The Japan Meteorological Agency (JMA) is the main weather forecasting agency in the Pacific Northwest Pacific basin, where it measures sustained winds by averaging wind speeds in a period of ten minutes. The basin is limited to the north of the equator between the 100th meridian east and the 180th meridian.

Tropical Depression Winnie, a deadly tropical depression that impacted the Philippines in November 2004

Background

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RSMC Tokyo's Tropical Cyclone Intensity Scale
Category Sustained winds
Violent typhoon ≥105 knots
≥194 km/h
Very strong typhoon 85–104 knots
157–193 km/h
Typhoon 64–84 knots
118–156 km/h
Severe tropical storm 48–63 knots
89–117 km/h
Tropical storm 34–47 knots
62–88 km/h
Tropical depression ≤33 knots
≤61 km/h

The Northwest Pacific basin covers a vast area in the Pacific Ocean, located north of the equator, between 100°E and 180°E.[1] Several weather agencies monitor this basin, however it is officially monitored by the Japan Meteorological Agency (JMA, RSMC Tokyo), who is responsible for forecasting, naming and issuing warnings for tropical cyclones.[1] Unofficially, the Joint Typhoon Warning Center also monitors the basin, however these warnings measures 1-minute sustained wind speeds, comparing their scale to the Saffir–Simpson scale.[2] The JMA uses a simpler scale on classifying tropical cyclones adapted by the ESCAP/WMO Typhoon Committee measuring 10-minute sustained wind speeds, ranging from a tropical depression, tropical storm, severe tropical storm and typhoon.[3] Furthermore, the JMA divides the typhoon category into three sub-categories for domestic purposes – a strong typhoon, very strong typhoon and violent typhoon.[3]

This article covers a list of systems developing in the Northwest Pacific basin that were classified by the category of a tropical depression by the JMA, JTWC and PAGASA. The category of a tropical depression ranges with sustained winds of below 34 knots (63 km/h; 39 mph).[3] Just to note that this article only lists tropical depressions that were named, designated and systems that affected any land masses.

Systems

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1980s

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Name System dates Sustained
wind speeds
Pressure Areas affected Damage
(USD)
Deaths Refs
Atring January 26 - 28, 1989 55 km/h (35 mph) 1002 hPa (29.59 inHg) Philippines $5 million 61

1990s

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Name System dates Sustained
wind speeds
Pressure Areas affected Damage
(USD)
Deaths Refs
Hilda (Auring) January 3 - 8, 1999 55 km/h (35 mph) 1000 hPa (29.53 inHg) Malaysia $1.3 million 5

2000s

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Name System dates Sustained
wind speeds
Pressure Areas affected Damage
(USD)
Deaths Refs
Auring January 3 - 6, 2009 45 km/h (30 mph) 1000 hPa (29.53 inHg) Philippines $498,318 2

2010s

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Name System dates Sustained
wind speeds
Pressure Areas affected Damage
(USD)
Deaths Refs
04W May 10 - 15, 2018 55 km/h (35 mph) 1008 hPa (29.77 inHg) None None None
Josie July 20 - 23, 2018 55 km/h (35 mph) 996 hPa (29.41 inHg Philippines, Taiwan $87.4 million 16
24W (Luis) August 21 - 26, 2018 55 km/h (35 mph) 996 hPa (29.41 inHg) Taiwan, East China $34 million 7
01W (Amang) January 4 – 22, 2019 55 km/h (35 mph) 1004 hPa (29.65 inHg) Kiribati, Marshall Islands, Caroline Islands, Philippines $6.04 million 10
03W (Chedeng) March 14 - 19, 2019 <55 km/h (35 mph) 1006 hPa (29.71 inHg) Caroline Islands, Philippines $23 thousand None
TD May 7 - 8, 2019 Not specified 1004 hPa (29.65 inHg) Yap, Palau None None
TD May 7 - 15, 2019 Not specified 1006 hPa (29.71 inHg) Caroline Islands None None
TD May 10 - 11, 2019 Not specified 1008 hPa (29.77 inHg) None None None
TD June 26 , 2019 55 km/h (35 mph) 1002 hPa (29.59 inHg) Japan, Korean Peninsula None None
04W (Egay) June 27 - July 1, 2019 <55 km/h (35 mph) 1002 hPa (29.59 inHg) Yap, Philippines, Taiwan, East China None None
Goring July 17 - 19, 2019 55 km/h (35 mph) 996 hPa (29.41 inHg) Philippines, Taiwan, Ryukyu Islands None None
TD August 6 - 8, 2019 55 km/h (35 mph) 994 hPa (29.35 inHg) Philippines None None
TD August 17 - 18, 2019 Not specified 1006 hPa (29.71 inHg) None None None
TD August 19 - 21, 2019 Not specified 1004 hPa (29.65 inHg) Ryukyu Islands, Taiwan, East China None None
TD September 1 - 2, 2019 55 km/h (35 mph) 1000 hPa (29.53 inHg) Philippines None None
TD September 4 - 5, 2019 Not specified 1006 hPa (29.71 inHg) Caroline Islands None None
TD September 7 - 10, 2019 55 km/h (35 mph) 1000 hPa (29.53 inHg) Ryukyu Islands, Korean Peninsula None None
Marilyn September 10 - 13, 2019 55 km/h (35 mph) 996 hPa (29.41 inHg) None None None
TD September 15 , 2019 Not specified 996 hPa (29.41 inHg) Japan None None
TD September 17 , 2019 Not specified 1004 hPa (29.65 inHg) Philippines None None
TD October 1 - 3, 2019 Not specified 1008 hPa (29.77 inHg) None None None
TD October 21 - 22, 2019 Not specified 1008 hPa (29.77 inHg) None None None
TD November 26 - 28, 2019 55 km/h (35 mph) 1002 hPa (29.59 hPa) Mariana Islands None None
TD November 28 - December 1 , 2019 55 km/h (35 mph) 1002 hPa (29.59 hPa) Caroline Islands None None

2020s

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Name System dates Sustained
wind speeds
Pressure Areas affected Damage
(USD)
Deaths Refs
Carina July 11 – 15, 2020 <55 km/h (35 mph) 1004 hPa (29.65 inHg) Philippines, Taiwan None None
TD July 27 – 29, 2020 Not specified 1010 hPa (29.83 inHg) None None None
Gener August 9 – 13, 2020 55 km/h (35 mph) 1012 hPa (29.83 inHg) None None None
12W September 10 – 12, 2020 55 km/h (35 mph) 1006 hPa (29.71 inHg) Japan None None
TD September 27 – 29, 2020 Not specified 1000 hPa (29.53 inHg) None None None
Ofel October 13 – 16, 2020 55 km/h (35 mph) 1002 hPa (29.65 inHg) Philippines, Vietnam $187,000 None
20W October 19 – 23, 2020 55 km/h (35 mph) 1006 hPa (29.71 inHg) None None None
TD December 5 – 6, 2020 Not specified 1010 hPa (29.83 inHg) None None None
TD December 29, 2020 Not specified 1004 hPa (29.65 inHg) None None None
TD January 19 – 20, 2021 <55 km/h (35 mph) 1008 hPa (29.77 inHg) Philippines $10.8 million 1


See also

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References

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  1. ^ a b WMO/ESCP Typhoon Committee (2019). Typhoon Committee Operational Manual Meteorological Component 2019 (PDF) (Report). World Meteorological Organization. pp. 1–7, 33–34. Retrieved April 29, 2020.
  2. ^ Joint Typhoon Warning Center (2008-03-31). "What are the description labels used with tropical cyclones by JTWC?". Joint Typhoon Warning Center – Frequently Asked Questions (FAQ). Archived from the original on 2013-09-01. Retrieved 2008-12-22.
  3. ^ a b c Typhoon Committee (2015). Typhoon Committee Operational Manual 2015 (PDF) (Report). World Meteorological Organization. Retrieved November 13, 2015.
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