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

Namtheun: 2021 Western North Pacific

Namtheun reached 55 kt (102 km/h, 63 mph) (TS) in the 2021 Western North Pacific season, from 2021-10-08 to 2021-10-20, with track, wind and pressure and 4.8 ACE.

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

Key Facts

  • Namtheun was a tropical storm at its peak in the 2021 Western North Pacific season.
  • Peak maximum sustained wind was 55 kt (102 km/h, 63 mph), reached on 15 October 2021, and the lowest pressure was 989 hPa.
  • The track runs from 8 October 2021 to 20 October 2021 with 91 six hourly positions.
  • Namtheun accumulated 4.8 ACE.
  • No landfall is recorded in the track.

Track

8 October 2021 to 20 October 2021
Track of Namtheun 2021, coloured by intensity Namtheun formed on 8 October 2021 and its track is coloured by category at each six hourly step, peaking as a tropical storm.
Namtheun formed on 8 October 2021 and its track is coloured by category at each six hourly step, peaking as a tropical storm. Made with Natural Earth and IBTrACS.
Track of Namtheun 2021, coloured by intensity: tracks drawn on the map
StormFirst position (lat, lon)Last position (lat, lon)Track points
Namtheun16.2, 165.141.8, 202.291

Wind

Knots, six hourly
Maximum sustained wind of Namtheun Maximum sustained wind in knots every six hours, from 15 kt (28 km/h, 17 mph) at the start to a peak of 55 kt (102 km/h, 63 mph). 0 15 30 45 60 10-0810-1010-1110-1310-1410-1610-1710-19
Maximum sustained wind in knots every six hours, from 15 kt (28 km/h, 17 mph) at the start to a peak of 55 kt (102 km/h, 63 mph).
Maximum sustained wind of Namtheun
Time (UTC)Wind (kt)
2021-10-08T18:00:00Z15 kt
2021-10-08T21:00:00Z15 kt
2021-10-09T00:00:00Z15 kt
2021-10-09T03:00:00Z23 kt
2021-10-09T06:00:00Z30 kt
2021-10-09T09:00:00Z30 kt
2021-10-09T12:00:00Z30 kt
2021-10-09T15:00:00Z30 kt
2021-10-09T18:00:00Z30 kt
2021-10-09T21:00:00Z35 kt
2021-10-10T00:00:00Z35 kt
2021-10-10T03:00:00Z38 kt
2021-10-10T06:00:00Z40 kt
2021-10-10T09:00:00Z38 kt
2021-10-10T12:00:00Z40 kt
2021-10-10T15:00:00Z40 kt
2021-10-10T18:00:00Z40 kt
2021-10-10T21:00:00Z43 kt
2021-10-11T00:00:00Z40 kt
2021-10-11T03:00:00Z45 kt
2021-10-11T06:00:00Z40 kt
2021-10-11T09:00:00Z45 kt
2021-10-11T12:00:00Z40 kt
2021-10-11T15:00:00Z45 kt
2021-10-11T18:00:00Z40 kt
2021-10-11T21:00:00Z43 kt
2021-10-12T00:00:00Z40 kt
2021-10-12T03:00:00Z38 kt
2021-10-12T06:00:00Z40 kt
2021-10-12T09:00:00Z33 kt
2021-10-12T12:00:00Z40 kt
2021-10-12T15:00:00Z30 kt
2021-10-12T18:00:00Z40 kt
2021-10-12T21:00:00Z28 kt
2021-10-13T00:00:00Z40 kt
2021-10-13T03:00:00Z25 kt
2021-10-13T06:00:00Z40 kt
2021-10-13T09:00:00Z28 kt
2021-10-13T12:00:00Z40 kt
2021-10-13T15:00:00Z33 kt
2021-10-13T18:00:00Z40 kt
2021-10-13T21:00:00Z38 kt
2021-10-14T00:00:00Z40 kt
2021-10-14T03:00:00Z43 kt
2021-10-14T06:00:00Z40 kt
2021-10-14T09:00:00Z45 kt
2021-10-14T12:00:00Z40 kt
2021-10-14T15:00:00Z40 kt
2021-10-14T18:00:00Z40 kt
2021-10-14T21:00:00Z40 kt
2021-10-15T00:00:00Z45 kt
2021-10-15T03:00:00Z45 kt
2021-10-15T06:00:00Z45 kt
2021-10-15T09:00:00Z45 kt
2021-10-15T12:00:00Z45 kt
2021-10-15T15:00:00Z50 kt
2021-10-15T18:00:00Z45 kt
2021-10-15T21:00:00Z55 kt
2021-10-16T00:00:00Z50 kt
2021-10-16T03:00:00Z53 kt
2021-10-16T06:00:00Z50 kt
2021-10-16T09:00:00Z53 kt
2021-10-16T12:00:00Z45 kt
2021-10-16T15:00:00Z53 kt
2021-10-16T18:00:00Z40 kt
2021-10-16T21:00:00Z45 kt
2021-10-17T00:00:00Z40 kt
2021-10-17T03:00:00Z38 kt
2021-10-17T06:00:00Z35 kt
2021-10-17T09:00:00Z35 kt
2021-10-17T12:00:00Z35 kt
2021-10-17T15:00:00Z33 kt
2021-10-17T18:00:00Z30 kt
2021-10-17T21:00:00Z30 kt
2021-10-18T00:00:00Z30 kt
2021-10-18T03:00:00Zn/a
2021-10-18T06:00:00Zn/a
2021-10-18T09:00:00Zn/a
2021-10-18T12:00:00Zn/a
2021-10-18T15:00:00Zn/a
2021-10-18T18:00:00Zn/a
2021-10-18T21:00:00Zn/a
2021-10-19T00:00:00Zn/a
2021-10-19T03:00:00Zn/a
2021-10-19T06:00:00Zn/a
2021-10-19T09:00:00Zn/a
2021-10-19T12:00:00Zn/a
2021-10-19T15:00:00Zn/a
2021-10-19T18:00:00Zn/a
2021-10-19T21:00:00Zn/a
2021-10-20T00:00:00Zn/a

Pressure

hPa, six hourly
Central pressure of Namtheun Central pressure in hectopascals every six hours, falling to 989 hPa at the lowest. 980 1035 1090 1145 1200 10-0810-1010-1110-1310-1410-1610-1710-19
Central pressure in hectopascals every six hours, falling to 989 hPa at the lowest.
Central pressure of Namtheun
Time (UTC)Pressure (hPa)
2021-10-08T18:00:00Z1010 hPa
2021-10-08T21:00:00Z1010 hPa
2021-10-09T00:00:00Z1010 hPa
2021-10-09T03:00:00Z1008 hPa
2021-10-09T06:00:00Z1006 hPa
2021-10-09T09:00:00Z1004 hPa
2021-10-09T12:00:00Z1004 hPa
2021-10-09T15:00:00Z1002 hPa
2021-10-09T18:00:00Z1002 hPa
2021-10-09T21:00:00Z1000 hPa
2021-10-10T00:00:00Z1000 hPa
2021-10-10T03:00:00Z998 hPa
2021-10-10T06:00:00Z998 hPa
2021-10-10T09:00:00Z997 hPa
2021-10-10T12:00:00Z998 hPa
2021-10-10T15:00:00Z996 hPa
2021-10-10T18:00:00Z998 hPa
2021-10-10T21:00:00Z997 hPa
2021-10-11T00:00:00Z998 hPa
2021-10-11T03:00:00Z997 hPa
2021-10-11T06:00:00Z998 hPa
2021-10-11T09:00:00Z996 hPa
2021-10-11T12:00:00Z998 hPa
2021-10-11T15:00:00Z996 hPa
2021-10-11T18:00:00Z998 hPa
2021-10-11T21:00:00Z998 hPa
2021-10-12T00:00:00Z998 hPa
2021-10-12T03:00:00Z1000 hPa
2021-10-12T06:00:00Z998 hPa
2021-10-12T09:00:00Z1002 hPa
2021-10-12T12:00:00Z998 hPa
2021-10-12T15:00:00Z1003 hPa
2021-10-12T18:00:00Z998 hPa
2021-10-12T21:00:00Z1003 hPa
2021-10-13T00:00:00Z998 hPa
2021-10-13T03:00:00Z1004 hPa
2021-10-13T06:00:00Z998 hPa
2021-10-13T09:00:00Z1004 hPa
2021-10-13T12:00:00Z998 hPa
2021-10-13T15:00:00Z1001 hPa
2021-10-13T18:00:00Z998 hPa
2021-10-13T21:00:00Z999 hPa
2021-10-14T00:00:00Z998 hPa
2021-10-14T03:00:00Z997 hPa
2021-10-14T06:00:00Z998 hPa
2021-10-14T09:00:00Z995 hPa
2021-10-14T12:00:00Z998 hPa
2021-10-14T15:00:00Z998 hPa
2021-10-14T18:00:00Z998 hPa
2021-10-14T21:00:00Z998 hPa
2021-10-15T00:00:00Z998 hPa
2021-10-15T03:00:00Z996 hPa
2021-10-15T06:00:00Z998 hPa
2021-10-15T09:00:00Z996 hPa
2021-10-15T12:00:00Z998 hPa
2021-10-15T15:00:00Z992 hPa
2021-10-15T18:00:00Z998 hPa
2021-10-15T21:00:00Z989 hPa
2021-10-16T00:00:00Z996 hPa
2021-10-16T03:00:00Z990 hPa
2021-10-16T06:00:00Z996 hPa
2021-10-16T09:00:00Z990 hPa
2021-10-16T12:00:00Z998 hPa
2021-10-16T15:00:00Z989 hPa
2021-10-16T18:00:00Z1000 hPa
2021-10-16T21:00:00Z994 hPa
2021-10-17T00:00:00Z1002 hPa
2021-10-17T03:00:00Z999 hPa
2021-10-17T06:00:00Z1002 hPa
2021-10-17T09:00:00Z999 hPa
2021-10-17T12:00:00Z1004 hPa
2021-10-17T15:00:00Z1000 hPa
2021-10-17T18:00:00Z1004 hPa
2021-10-17T21:00:00Z1001 hPa
2021-10-18T00:00:00Z1004 hPa
2021-10-18T03:00:00Zn/a
2021-10-18T06:00:00Z1002 hPa
2021-10-18T09:00:00Zn/a
2021-10-18T12:00:00Z1000 hPa
2021-10-18T15:00:00Zn/a
2021-10-18T18:00:00Z1000 hPa
2021-10-18T21:00:00Zn/a
2021-10-19T00:00:00Zn/a
2021-10-19T03:00:00Zn/a
2021-10-19T06:00:00Zn/a
2021-10-19T09:00:00Zn/a
2021-10-19T12:00:00Zn/a
2021-10-19T15:00:00Zn/a
2021-10-19T18:00:00Zn/a
2021-10-19T21:00:00Zn/a
2021-10-20T00:00:00Zn/a

ACE Compared With the 2021 Season

Accumulated cyclone energy of named storms in 2021
Sam (North Atlantic)54.0 ACE
Habana (South-West Indian)34.2 ACE
Larry (North Atlantic)31.9 ACE
Surigae (Western North Pacific)28.7 ACE
Chanthu (Western North Pacific)28.7 ACE
Linda (Eastern North Pacific)25.4 ACE
Faraji (South-West Indian)22.1 ACE
Mindulle (Western North Pacific)21.9 ACE
Felicia (Eastern North Pacific)21.4 ACE
Yasa (South Pacific)19.8 ACE
Rai (Western North Pacific)18.9 ACE
In-Fa (Western North Pacific)14.9 ACE
Marian (South-West Indian)14.2 ACE
Niran (South Pacific)14.1 ACE
Ida (North Atlantic)10.6 ACE
Elsa (North Atlantic)9.9 ACE
Grace (North Atlantic)8.6 ACE
Hilda (Eastern North Pacific)8.3 ACE
Nyatoh (Western North Pacific)8.0 ACE
Henri (North Atlantic)7.8 ACE
Enrique (Eastern North Pacific)7.7 ACE
Tauktae (North Indian)7.7 ACE
Rick (Eastern North Pacific)6.7 ACE
Malou (Western North Pacific)6.6 ACE
Eloise (South-West Indian)6.2 ACE
Seroja (South-West Indian)6.1 ACE
Wanda (North Atlantic)5.7 ACE
Conson (Western North Pacific)5.4 ACE
Kompasu (Western North Pacific)5.3 ACE
Champi (Western North Pacific)5.0 ACE
Gulab:Shaheen-Gu (North Indian)4.9 ACE
Namtheun (this storm)4.8 ACE
Nora (Eastern North Pacific)4.6 ACE
Ana (South Pacific)4.4 ACE
Guambe (South-West Indian)4.3 ACE
Pamela (Eastern North Pacific)4.2 ACE
Odette (South-West Indian)3.9 ACE
Olaf (Eastern North Pacific)3.7 ACE
Chalane (South-West Indian)3.7 ACE
Alicia (South-West Indian)3.6 ACE
Yaas (North Indian)3.6 ACE
Danilo (South-West Indian)3.6 ACE
Cempaka (Western North Pacific)3.4 ACE
Mirinae (Western North Pacific)3.4 ACE
Bongoyo (South-West Indian)3.4 ACE
Kevin (Eastern North Pacific)3.2 ACE
Choi-Wan (Western North Pacific)3.2 ACE
Jobo (South-West Indian)3.2 ACE
Lucas (South Pacific)3.2 ACE
Nida (Western North Pacific)3.2 ACE
Lupit (Western North Pacific)3.0 ACE
Omais (Eastern North Pacific)2.9 ACE
Victor (North Atlantic)2.5 ACE
Fred (North Atlantic)2.4 ACE
Nicholas (North Atlantic)2.4 ACE
Zazu (South Pacific)2.2 ACE
Dujuan (Western North Pacific)2.0 ACE
Joshua (South-West Indian)1.9 ACE
Peter (North Atlantic)1.8 ACE
Blanca (Eastern North Pacific)1.7 ACE
Kimi (South Pacific)1.6 ACE
Guillermo (Eastern North Pacific)1.6 ACE
Rose (North Atlantic)1.4 ACE
Dolores (Eastern North Pacific)1.4 ACE
Carlos (Eastern North Pacific)1.3 ACE
Lionrock (Western North Pacific)1.2 ACE
Iman (South-West Indian)1.1 ACE
Claudette (North Atlantic)1.1 ACE
Julian (North Atlantic)1.1 ACE
Bill (North Atlantic)1.0 ACE
Ana (North Atlantic)0.8 ACE
Bina (South Pacific)0.8 ACE
Jawad (North Indian)0.7 ACE
Marty (Eastern North Pacific)0.7 ACE
Kate (North Atlantic)0.7 ACE
Andres (Eastern North Pacific)0.6 ACE
Jimena (Eastern North Pacific)0.6 ACE
Sandra (Eastern North Pacific)0.6 ACE
Teresa (North Atlantic)0.6 ACE
Imogen (South Pacific)0.5 ACE
Koguma (Western North Pacific)0.5 ACE
Terry (Eastern North Pacific)0.5 ACE
Mindy (North Atlantic)0.5 ACE
Odette (North Atlantic)0.4 ACE
Danny (North Atlantic)0.4 ACE
Ignacio (Eastern North Pacific)0.4 ACE
Dianmu (Western North Pacific)0.3 ACE
Nepartak (Western North Pacific)0.0 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.

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.