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Data as of 2026-10-17
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Built 2026-10-19 (19 October 2026)

Koinu: 2023 Western North Pacific

Koinu reached 120 kt (222 km/h, 138 mph) (C4) in the 2023 Western North Pacific season, from 2023-09-27 to 2023-10-10, with track, wind and pressure and 20.3 ACE.

Data as of . Last revised (2026-10-17).

Key Facts

  • Koinu was a category 4 at its peak in the 2023 Western North Pacific season.
  • Peak maximum sustained wind was 120 kt (222 km/h, 138 mph), reached on 4 October 2023, and the lowest pressure was 936 hPa.
  • The track runs from 27 September 2023 to 10 October 2023 with 117 six hourly positions.
  • Koinu accumulated 20.3 ACE.
  • 1 landfall is recorded, the first on 5 October 2023.

Track

27 September 2023 to 10 October 2023
Track of Koinu 2023, coloured by intensity Koinu formed on 27 September 2023 and its track is coloured by category at each six hourly step, peaking as a category 4. Landfall 2023-10-05
Koinu formed on 27 September 2023 and its track is coloured by category at each six hourly step, peaking as a category 4. Made with Natural Earth and IBTrACS. Ringed points mark landfalls or the latest advisory position.
Track of Koinu 2023, coloured by intensity: tracks drawn on the map
StormFirst position (lat, lon)Last position (lat, lon)Track points
Koinu14.2, 143.820.6, 111.3117

Wind

Knots, six hourly
Maximum sustained wind of Koinu Maximum sustained wind in knots every six hours, from 15 kt (28 km/h, 17 mph) at the start to a peak of 120 kt (222 km/h, 138 mph). 0 30 60 90 120 09-2709-2910-0110-0310-0510-0610-0810-08
Maximum sustained wind in knots every six hours, from 15 kt (28 km/h, 17 mph) at the start to a peak of 120 kt (222 km/h, 138 mph).
Maximum sustained wind of Koinu
Time (UTC)Wind (kt)
2023-09-27T12:00:00Z15 kt
2023-09-27T15:00:00Z15 kt
2023-09-27T18:00:00Z15 kt
2023-09-27T21:00:00Z15 kt
2023-09-28T00:00:00Z15 kt
2023-09-28T03:00:00Z15 kt
2023-09-28T06:00:00Z15 kt
2023-09-28T09:00:00Z18 kt
2023-09-28T12:00:00Z20 kt
2023-09-28T15:00:00Z20 kt
2023-09-28T18:00:00Z20 kt
2023-09-28T21:00:00Z20 kt
2023-09-29T00:00:00Z20 kt
2023-09-29T03:00:00Z20 kt
2023-09-29T06:00:00Z20 kt
2023-09-29T09:00:00Z23 kt
2023-09-29T12:00:00Z25 kt
2023-09-29T15:00:00Z28 kt
2023-09-29T18:00:00Z35 kt
2023-09-29T21:00:00Z30 kt
2023-09-30T00:00:00Z35 kt
2023-09-30T03:00:00Z33 kt
2023-09-30T06:00:00Z35 kt
2023-09-30T09:00:00Z38 kt
2023-09-30T12:00:00Z40 kt
2023-09-30T15:00:00Z43 kt
2023-09-30T18:00:00Z45 kt
2023-09-30T21:00:00Z50 kt
2023-10-01T00:00:00Z50 kt
2023-10-01T03:00:00Z60 kt
2023-10-01T06:00:00Z50 kt
2023-10-01T09:00:00Z70 kt
2023-10-01T12:00:00Z55 kt
2023-10-01T15:00:00Z78 kt
2023-10-01T18:00:00Z65 kt
2023-10-01T21:00:00Z93 kt
2023-10-02T00:00:00Z75 kt
2023-10-02T03:00:00Z108 kt
2023-10-02T06:00:00Z80 kt
2023-10-02T09:00:00Z115 kt
2023-10-02T12:00:00Z85 kt
2023-10-02T15:00:00Z115 kt
2023-10-02T18:00:00Z90 kt
2023-10-02T21:00:00Z108 kt
2023-10-03T00:00:00Z90 kt
2023-10-03T03:00:00Z103 kt
2023-10-03T06:00:00Z90 kt
2023-10-03T09:00:00Z98 kt
2023-10-03T12:00:00Z90 kt
2023-10-03T15:00:00Z93 kt
2023-10-03T18:00:00Z85 kt
2023-10-03T21:00:00Z98 kt
2023-10-04T00:00:00Z85 kt
2023-10-04T03:00:00Z110 kt
2023-10-04T06:00:00Z90 kt
2023-10-04T09:00:00Z118 kt
2023-10-04T12:00:00Z90 kt
2023-10-04T15:00:00Z120 kt
2023-10-04T18:00:00Z90 kt
2023-10-04T21:00:00Z115 kt
2023-10-05T00:00:00Z80 kt
2023-10-05T03:00:00Z100 kt
2023-10-05T06:00:00Z70 kt
2023-10-05T09:00:00Z85 kt
2023-10-05T12:00:00Z70 kt
2023-10-05T15:00:00Z75 kt
2023-10-05T18:00:00Z65 kt
2023-10-05T21:00:00Z80 kt
2023-10-06T00:00:00Z75 kt
2023-10-06T03:00:00Z95 kt
2023-10-06T06:00:00Z80 kt
2023-10-06T09:00:00Z100 kt
2023-10-06T12:00:00Z80 kt
2023-10-06T15:00:00Z103 kt
2023-10-06T18:00:00Z85 kt
2023-10-06T21:00:00Z103 kt
2023-10-07T00:00:00Z85 kt
2023-10-07T03:00:00Z103 kt
2023-10-07T06:00:00Z85 kt
2023-10-07T09:00:00Z103 kt
2023-10-07T12:00:00Z80 kt
2023-10-07T15:00:00Z93 kt
2023-10-07T18:00:00Z75 kt
2023-10-07T21:00:00Z80 kt
2023-10-08T00:00:00Z70 kt
2023-10-08T01:00:00Z76 kt
2023-10-08T02:00:00Z77 kt
2023-10-08T03:00:00Z78 kt
2023-10-08T04:00:00Z78 kt
2023-10-08T05:00:00Z79 kt
2023-10-08T06:00:00Z70 kt
2023-10-08T07:00:00Z82 kt
2023-10-08T08:00:00Z83 kt
2023-10-08T09:00:00Z85 kt
2023-10-08T10:00:00Z87 kt
2023-10-08T11:00:00Z88 kt
2023-10-08T12:00:00Z65 kt
2023-10-08T13:00:00Z87 kt
2023-10-08T14:00:00Z83 kt
2023-10-08T15:00:00Z80 kt
2023-10-08T16:00:00Z77 kt
2023-10-08T17:00:00Z73 kt
2023-10-08T18:00:00Z55 kt
2023-10-08T19:00:00Z67 kt
2023-10-08T20:00:00Z63 kt
2023-10-08T21:00:00Z60 kt
2023-10-08T22:00:00Z57 kt
2023-10-08T23:00:00Z53 kt
2023-10-09T00:00:00Z45 kt
2023-10-09T03:00:00Z45 kt
2023-10-09T06:00:00Z40 kt
2023-10-09T09:00:00Z35 kt
2023-10-09T12:00:00Z30 kt
2023-10-09T15:00:00Z28 kt
2023-10-09T18:00:00Z25 kt
2023-10-09T21:00:00Z23 kt
2023-10-10T00:00:00Z20 kt

Pressure

hPa, six hourly
Central pressure of Koinu Central pressure in hectopascals every six hours, falling to 936 hPa at the lowest. 930 998 1065 1133 1200 09-2709-2910-0110-0310-0510-0610-0810-08
Central pressure in hectopascals every six hours, falling to 936 hPa at the lowest.
Central pressure of Koinu
Time (UTC)Pressure (hPa)
2023-09-27T12:00:00Z1010 hPa
2023-09-27T15:00:00Z1010 hPa
2023-09-27T18:00:00Z1010 hPa
2023-09-27T21:00:00Z1010 hPa
2023-09-28T00:00:00Z1010 hPa
2023-09-28T03:00:00Z1010 hPa
2023-09-28T06:00:00Z1010 hPa
2023-09-28T09:00:00Z1010 hPa
2023-09-28T12:00:00Z1004 hPa
2023-09-28T15:00:00Z1009 hPa
2023-09-28T18:00:00Z1004 hPa
2023-09-28T21:00:00Z1009 hPa
2023-09-29T00:00:00Z1004 hPa
2023-09-29T03:00:00Z1009 hPa
2023-09-29T06:00:00Z1002 hPa
2023-09-29T09:00:00Z1008 hPa
2023-09-29T12:00:00Z1004 hPa
2023-09-29T15:00:00Z1004 hPa
2023-09-29T18:00:00Z1000 hPa
2023-09-29T21:00:00Z1001 hPa
2023-09-30T00:00:00Z1000 hPa
2023-09-30T03:00:00Z1001 hPa
2023-09-30T06:00:00Z998 hPa
2023-09-30T09:00:00Z998 hPa
2023-09-30T12:00:00Z996 hPa
2023-09-30T15:00:00Z996 hPa
2023-09-30T18:00:00Z992 hPa
2023-09-30T21:00:00Z993 hPa
2023-10-01T00:00:00Z990 hPa
2023-10-01T03:00:00Z987 hPa
2023-10-01T06:00:00Z990 hPa
2023-10-01T09:00:00Z981 hPa
2023-10-01T12:00:00Z985 hPa
2023-10-01T15:00:00Z975 hPa
2023-10-01T18:00:00Z975 hPa
2023-10-01T21:00:00Z963 hPa
2023-10-02T00:00:00Z965 hPa
2023-10-02T03:00:00Z952 hPa
2023-10-02T06:00:00Z955 hPa
2023-10-02T09:00:00Z945 hPa
2023-10-02T12:00:00Z950 hPa
2023-10-02T15:00:00Z943 hPa
2023-10-02T18:00:00Z940 hPa
2023-10-02T21:00:00Z948 hPa
2023-10-03T00:00:00Z940 hPa
2023-10-03T03:00:00Z952 hPa
2023-10-03T06:00:00Z940 hPa
2023-10-03T09:00:00Z956 hPa
2023-10-03T12:00:00Z940 hPa
2023-10-03T15:00:00Z960 hPa
2023-10-03T18:00:00Z950 hPa
2023-10-03T21:00:00Z956 hPa
2023-10-04T00:00:00Z950 hPa
2023-10-04T03:00:00Z944 hPa
2023-10-04T06:00:00Z940 hPa
2023-10-04T09:00:00Z938 hPa
2023-10-04T12:00:00Z940 hPa
2023-10-04T15:00:00Z936 hPa
2023-10-04T18:00:00Z940 hPa
2023-10-04T21:00:00Z942 hPa
2023-10-05T00:00:00Z960 hPa
2023-10-05T03:00:00Z954 hPa
2023-10-05T06:00:00Z975 hPa
2023-10-05T09:00:00Z966 hPa
2023-10-05T12:00:00Z975 hPa
2023-10-05T15:00:00Z975 hPa
2023-10-05T18:00:00Z980 hPa
2023-10-05T21:00:00Z972 hPa
2023-10-06T00:00:00Z970 hPa
2023-10-06T03:00:00Z961 hPa
2023-10-06T06:00:00Z960 hPa
2023-10-06T09:00:00Z957 hPa
2023-10-06T12:00:00Z960 hPa
2023-10-06T15:00:00Z955 hPa
2023-10-06T18:00:00Z955 hPa
2023-10-06T21:00:00Z956 hPa
2023-10-07T00:00:00Z955 hPa
2023-10-07T03:00:00Z956 hPa
2023-10-07T06:00:00Z955 hPa
2023-10-07T09:00:00Z955 hPa
2023-10-07T12:00:00Z960 hPa
2023-10-07T15:00:00Z963 hPa
2023-10-07T18:00:00Z970 hPa
2023-10-07T21:00:00Z973 hPa
2023-10-08T00:00:00Z975 hPa
2023-10-08T01:00:00Z976 hPa
2023-10-08T02:00:00Z976 hPa
2023-10-08T03:00:00Z975 hPa
2023-10-08T04:00:00Z974 hPa
2023-10-08T05:00:00Z974 hPa
2023-10-08T06:00:00Z975 hPa
2023-10-08T07:00:00Z972 hPa
2023-10-08T08:00:00Z971 hPa
2023-10-08T09:00:00Z971 hPa
2023-10-08T10:00:00Z970 hPa
2023-10-08T11:00:00Z969 hPa
2023-10-08T12:00:00Z980 hPa
2023-10-08T13:00:00Z970 hPa
2023-10-08T14:00:00Z972 hPa
2023-10-08T15:00:00Z975 hPa
2023-10-08T16:00:00Z977 hPa
2023-10-08T17:00:00Z979 hPa
2023-10-08T18:00:00Z992 hPa
2023-10-08T19:00:00Z983 hPa
2023-10-08T20:00:00Z985 hPa
2023-10-08T21:00:00Z988 hPa
2023-10-08T22:00:00Z990 hPa
2023-10-08T23:00:00Z992 hPa
2023-10-09T00:00:00Z998 hPa
2023-10-09T03:00:00Z996 hPa
2023-10-09T06:00:00Z1010 hPa
2023-10-09T09:00:00Z999 hPa
2023-10-09T12:00:00Z1012 hPa
2023-10-09T15:00:00Z1005 hPa
2023-10-09T18:00:00Z1012 hPa
2023-10-09T21:00:00Z1007 hPa
2023-10-10T00:00:00Z1003 hPa

ACE Compared With the 2023 Season

Accumulated cyclone energy of named storms in 2023
Freddy (South-West Indian)66.2 ACE
Dora (Eastern North Pacific)53.8 ACE
Mawar (Western North Pacific)36.9 ACE
Lee (North Atlantic)36.7 ACE
Darian (South-West Indian)33.1 ACE
Saola (Western North Pacific)26.8 ACE
Franklin (North Atlantic)26.4 ACE
Biparjoy (North Indian)22.5 ACE
Khanun (Western North Pacific)22.2 ACE
Koinu (this storm)20.3 ACE
Bolaven (Western North Pacific)18.5 ACE
Tammy (North Atlantic)17.4 ACE
Jova (Eastern North Pacific)16.1 ACE
Doksuri (Western North Pacific)15.7 ACE
Lan (Western North Pacific)15.7 ACE
Norma (Eastern North Pacific)14.9 ACE
Calvin (Eastern North Pacific)14.4 ACE
Kevin (South Pacific)13.6 ACE
Hilary (Eastern North Pacific)13.2 ACE
Margot (North Atlantic)12.5 ACE
Lidia (Eastern North Pacific)12.0 ACE
Herman (South-West Indian)11.7 ACE
Mocha (North Indian)11.3 ACE
Judy (South Pacific)11.3 ACE
Fernanda (Eastern North Pacific)11.3 ACE
Fabien (South-West Indian)10.6 ACE
Nigel (North Atlantic)10.5 ACE
Ilsa (South Pacific)10.0 ACE
Philippe (North Atlantic)9.6 ACE
Guchol (Western North Pacific)9.3 ACE
Haikui (Western North Pacific)9.2 ACE
Adrian (Eastern North Pacific)8.8 ACE
Dingani (South-West Indian)8.1 ACE
Cheneso (South-West Indian)8.0 ACE
Tej (North Indian)7.7 ACE
Otis (Eastern North Pacific)7.4 ACE
Idalia (North Atlantic)7.1 ACE
Don (North Atlantic)6.7 ACE
Enala (South-West Indian)6.6 ACE
Gabrielle (South Pacific)5.8 ACE
Pilar (Eastern North Pacific)5.4 ACE
Bret (North Atlantic)4.5 ACE
Talim (Western North Pacific)3.7 ACE
Damrey (Western North Pacific)3.4 ACE
Gert (North Atlantic)2.7 ACE
Beatriz (Eastern North Pacific)2.6 ACE
Cindy (North Atlantic)2.5 ACE
Greg (Eastern North Pacific)2.4 ACE
Kirogi (Western North Pacific)2.4 ACE
Michaung (North Indian)2.3 ACE
Rina (North Atlantic)2.2 ACE
Eugene (Eastern North Pacific)1.9 ACE
Jose (North Atlantic)1.8 ACE
Kenneth (Eastern North Pacific)1.8 ACE
Yun-Yeung (Western North Pacific)1.8 ACE
Hamoon (North Indian)1.7 ACE
Ophelia (North Atlantic)1.5 ACE
Katia (North Atlantic)1.3 ACE
Sean (North Atlantic)1.3 ACE
Sanba (Western North Pacific)1.3 ACE
Ashley (South-West Indian)1.3 ACE
Sanvu (Western North Pacific)1.2 ACE
Max (Eastern North Pacific)1.2 ACE
Irene (South Pacific)1.1 ACE
Irwin (Eastern North Pacific)1.1 ACE
Ramon (Eastern North Pacific)0.9 ACE
Emily (North Atlantic)0.9 ACE
Harold (North Atlantic)0.6 ACE
Arlene (North Atlantic)0.5 ACE
Midhili (North Indian)0.5 ACE
Ellie (South-West Indian)0.4 ACE
Balita (South-West Indian)0.4 ACE
Hale (South Pacific)0.4 ACE
Jelawat (Western North Pacific)0.4 ACE

ACE is the sum of the squares of six hourly wind speeds, in units of 10,000 knots squared, counted while winds are at or above 34 knots.

Landfalls

Landfalls of Koinu 2023
DatePlacePositionWind
2023-10-05Open coast, place not named in the data22.0, 120.880 kt (148 km/h, 92 mph)

Which Agency's Numbers

Wind and pressure from jtwc_wp,tokyo,us as carried in NOAA IBTrACS. Agencies average winds over different periods.

Related Headlines

Third party news, headline and link only

Download the Data

Sources: Source: International Best Track Archive for Climate Stewardship (IBTrACS) v04r01, NOAA National Centers for Environmental Information, doi:10.25921/82ty-9e16. Some agency values come from third parties such as JMA, IMD and BoM. (NOAA NCEI terms (citation requested)) Made with Natural Earth. Public domain map data. Borders are Natural Earth's de facto depiction. Data as of 2026-10-17. Storm records are best tracks and can be revised by the agencies.