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

Lan: 2017 Western North Pacific

Lan reached 130 kt (241 km/h, 150 mph) (C4) in the 2017 Western North Pacific season, from 2017-10-15 to 2017-10-23, with track, wind and pressure and 14.5 ACE.

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

Key Facts

  • Lan was a category 4 at its peak in the 2017 Western North Pacific season.
  • Peak maximum sustained wind was 130 kt (241 km/h, 150 mph), reached on 20 October 2017, and the lowest pressure was 915 hPa.
  • The track runs from 15 October 2017 to 23 October 2017 with 71 six hourly positions.
  • Lan accumulated 14.5 ACE.
  • 1 landfall is recorded, the first on 22 October 2017.

Track

15 October 2017 to 23 October 2017
Track of Lan 2017, coloured by intensity Lan formed on 15 October 2017 and its track is coloured by category at each six hourly step, peaking as a category 4. Landfall 2017-10-22
Lan formed on 15 October 2017 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 Lan 2017, coloured by intensity: tracks drawn on the map
StormFirst position (lat, lon)Last position (lat, lon)Track points
Lan8.7, 137.944.2, 155.471

Wind

Knots, six hourly
Maximum sustained wind of Lan Maximum sustained wind in knots every six hours, from 20 kt (37 km/h, 23 mph) at the start to a peak of 130 kt (241 km/h, 150 mph). 0 38 75 113 150 10-1510-1610-1710-1810-1910-2010-2110-22
Maximum sustained wind in knots every six hours, from 20 kt (37 km/h, 23 mph) at the start to a peak of 130 kt (241 km/h, 150 mph).
Maximum sustained wind of Lan
Time (UTC)Wind (kt)
2017-10-15T00:00:00Z20 kt
2017-10-15T03:00:00Z20 kt
2017-10-15T06:00:00Z20 kt
2017-10-15T09:00:00Z23 kt
2017-10-15T12:00:00Z25 kt
2017-10-15T15:00:00Z28 kt
2017-10-15T18:00:00Z35 kt
2017-10-15T21:00:00Z33 kt
2017-10-16T00:00:00Z35 kt
2017-10-16T03:00:00Z35 kt
2017-10-16T06:00:00Z40 kt
2017-10-16T09:00:00Z38 kt
2017-10-16T12:00:00Z40 kt
2017-10-16T15:00:00Z43 kt
2017-10-16T18:00:00Z45 kt
2017-10-16T21:00:00Z45 kt
2017-10-17T00:00:00Z45 kt
2017-10-17T03:00:00Z45 kt
2017-10-17T06:00:00Z50 kt
2017-10-17T09:00:00Z53 kt
2017-10-17T12:00:00Z55 kt
2017-10-17T15:00:00Z58 kt
2017-10-17T18:00:00Z65 kt
2017-10-17T21:00:00Z63 kt
2017-10-18T00:00:00Z65 kt
2017-10-18T03:00:00Z65 kt
2017-10-18T06:00:00Z65 kt
2017-10-18T09:00:00Z65 kt
2017-10-18T12:00:00Z65 kt
2017-10-18T15:00:00Z68 kt
2017-10-18T18:00:00Z65 kt
2017-10-18T21:00:00Z73 kt
2017-10-19T00:00:00Z70 kt
2017-10-19T03:00:00Z83 kt
2017-10-19T06:00:00Z70 kt
2017-10-19T09:00:00Z88 kt
2017-10-19T12:00:00Z70 kt
2017-10-19T15:00:00Z83 kt
2017-10-19T18:00:00Z70 kt
2017-10-19T21:00:00Z83 kt
2017-10-20T00:00:00Z70 kt
2017-10-20T03:00:00Z90 kt
2017-10-20T06:00:00Z80 kt
2017-10-20T09:00:00Z105 kt
2017-10-20T12:00:00Z85 kt
2017-10-20T15:00:00Z123 kt
2017-10-20T18:00:00Z90 kt
2017-10-20T21:00:00Z130 kt
2017-10-21T00:00:00Z90 kt
2017-10-21T03:00:00Z90 kt
2017-10-21T06:00:00Z90 kt
2017-10-21T09:00:00Z90 kt
2017-10-21T12:00:00Z90 kt
2017-10-21T15:00:00Z95 kt
2017-10-21T18:00:00Z100 kt
2017-10-21T21:00:00Z100 kt
2017-10-22T00:00:00Z100 kt
2017-10-22T03:00:00Z100 kt
2017-10-22T06:00:00Z100 kt
2017-10-22T09:00:00Z95 kt
2017-10-22T12:00:00Z90 kt
2017-10-22T15:00:00Z85 kt
2017-10-22T18:00:00Z80 kt
2017-10-22T21:00:00Z65 kt
2017-10-23T00:00:00Z55 kt
2017-10-23T03:00:00Zn/a
2017-10-23T06:00:00Zn/a
2017-10-23T09:00:00Zn/a
2017-10-23T12:00:00Zn/a
2017-10-23T15:00:00Zn/a
2017-10-23T18:00:00Zn/a

Pressure

hPa, six hourly
Central pressure of Lan Central pressure in hectopascals every six hours, falling to 915 hPa at the lowest. 910 983 1055 1128 1200 10-1510-1610-1710-1810-1910-2010-2110-22
Central pressure in hectopascals every six hours, falling to 915 hPa at the lowest.
Central pressure of Lan
Time (UTC)Pressure (hPa)
2017-10-15T00:00:00Z1007 hPa
2017-10-15T03:00:00Z1005 hPa
2017-10-15T06:00:00Z1002 hPa
2017-10-15T09:00:00Z1003 hPa
2017-10-15T12:00:00Z1002 hPa
2017-10-15T15:00:00Z1002 hPa
2017-10-15T18:00:00Z1000 hPa
2017-10-15T21:00:00Z1002 hPa
2017-10-16T00:00:00Z1000 hPa
2017-10-16T03:00:00Z1001 hPa
2017-10-16T06:00:00Z996 hPa
2017-10-16T09:00:00Z997 hPa
2017-10-16T12:00:00Z996 hPa
2017-10-16T15:00:00Z991 hPa
2017-10-16T18:00:00Z992 hPa
2017-10-16T21:00:00Z989 hPa
2017-10-17T00:00:00Z992 hPa
2017-10-17T03:00:00Z989 hPa
2017-10-17T06:00:00Z985 hPa
2017-10-17T09:00:00Z990 hPa
2017-10-17T12:00:00Z980 hPa
2017-10-17T15:00:00Z983 hPa
2017-10-17T18:00:00Z970 hPa
2017-10-17T21:00:00Z978 hPa
2017-10-18T00:00:00Z970 hPa
2017-10-18T03:00:00Z978 hPa
2017-10-18T06:00:00Z970 hPa
2017-10-18T09:00:00Z978 hPa
2017-10-18T12:00:00Z970 hPa
2017-10-18T15:00:00Z974 hPa
2017-10-18T18:00:00Z970 hPa
2017-10-18T21:00:00Z969 hPa
2017-10-19T00:00:00Z965 hPa
2017-10-19T03:00:00Z962 hPa
2017-10-19T06:00:00Z965 hPa
2017-10-19T09:00:00Z958 hPa
2017-10-19T12:00:00Z965 hPa
2017-10-19T15:00:00Z961 hPa
2017-10-19T18:00:00Z965 hPa
2017-10-19T21:00:00Z961 hPa
2017-10-20T00:00:00Z965 hPa
2017-10-20T03:00:00Z956 hPa
2017-10-20T06:00:00Z950 hPa
2017-10-20T09:00:00Z945 hPa
2017-10-20T12:00:00Z945 hPa
2017-10-20T15:00:00Z932 hPa
2017-10-20T18:00:00Z935 hPa
2017-10-20T21:00:00Z926 hPa
2017-10-21T00:00:00Z935 hPa
2017-10-21T03:00:00Z935 hPa
2017-10-21T06:00:00Z935 hPa
2017-10-21T09:00:00Z935 hPa
2017-10-21T12:00:00Z935 hPa
2017-10-21T15:00:00Z925 hPa
2017-10-21T18:00:00Z915 hPa
2017-10-21T21:00:00Z915 hPa
2017-10-22T00:00:00Z915 hPa
2017-10-22T03:00:00Z915 hPa
2017-10-22T06:00:00Z915 hPa
2017-10-22T09:00:00Z925 hPa
2017-10-22T12:00:00Z935 hPa
2017-10-22T15:00:00Z945 hPa
2017-10-22T18:00:00Z950 hPa
2017-10-22T21:00:00Z965 hPa
2017-10-23T00:00:00Z970 hPa
2017-10-23T03:00:00Zn/a
2017-10-23T06:00:00Z970 hPa
2017-10-23T09:00:00Zn/a
2017-10-23T12:00:00Z972 hPa
2017-10-23T15:00:00Zn/a
2017-10-23T18:00:00Z978 hPa

ACE Compared With the 2017 Season

Accumulated cyclone energy of named storms in 2017
Irma (North Atlantic)64.9 ACE
Maria (North Atlantic)44.8 ACE
Jose (North Atlantic)43.3 ACE
Noru (Western North Pacific)34.4 ACE
Fernanda (Eastern North Pacific)28.4 ACE
Lee (North Atlantic)17.9 ACE
Donna (South Pacific)16.8 ACE
Talim (Western North Pacific)16.4 ACE
Hilary (Eastern North Pacific)14.6 ACE
Ophelia (North Atlantic)14.5 ACE
Lan (this storm)14.5 ACE
Harvey (North Atlantic)11.4 ACE
Irwin (Eastern North Pacific)11.1 ACE
Kenneth (Eastern North Pacific)10.3 ACE
Ernie (South-West Indian)10.0 ACE
Enawo (South-West Indian)9.8 ACE
Banyan (Western North Pacific)9.5 ACE
Ockhi (North Indian)9.3 ACE
Eugene (Eastern North Pacific)8.1 ACE
Gert (North Atlantic)7.8 ACE
Sanvu (Western North Pacific)7.1 ACE
Debbie (South Pacific)6.9 ACE
Nesat (Western North Pacific)6.4 ACE
Carlos (South-West Indian)6.4 ACE
Ella (South Pacific)6.2 ACE
Katia (North Atlantic)6.1 ACE
Tembin (Western North Pacific)5.5 ACE
Cook (South Pacific)5.4 ACE
Greg (Eastern North Pacific)5.2 ACE
Dora (Eastern North Pacific)5.0 ACE
Doksuri (Western North Pacific)4.8 ACE
Saola (Western North Pacific)4.7 ACE
Norma (Eastern North Pacific)4.7 ACE
Otis (Eastern North Pacific)4.6 ACE
Nate (North Atlantic)4.1 ACE
Khanun (Western North Pacific)4.0 ACE
Dineo (South-West Indian)3.8 ACE
Franklin (North Atlantic)3.7 ACE
Hato (Western North Pacific)3.7 ACE
Damrey (Western North Pacific)3.6 ACE
Bransby (South-West Indian)3.5 ACE
Frances (South Pacific)3.4 ACE
Nanmadol (Western North Pacific)2.8 ACE
Kulap (Western North Pacific)2.7 ACE
Lidia (Eastern North Pacific)2.6 ACE
Caleb (South-West Indian)2.5 ACE
Yvette (South-West Indian)2.4 ACE
Mawar (Western North Pacific)2.3 ACE
Nalgae (Western North Pacific)2.3 ACE
Max (Eastern North Pacific)2.2 ACE
Pakhar (Western North Pacific)2.2 ACE
Kai-Tak (Western North Pacific)2.1 ACE
Abela (South-West Indian)2.1 ACE
Mora (North Indian)1.9 ACE
Cindy (North Atlantic)1.8 ACE
Talas (Western North Pacific)1.7 ACE
Rina (North Atlantic)1.7 ACE
Haitang (Western North Pacific)1.5 ACE
Sonca (Western North Pacific)1.5 ACE
Merbok (Western North Pacific)1.5 ACE
Haikui (Western North Pacific)1.2 ACE
Alfred (South Pacific)1.2 ACE
Pilar (Eastern North Pacific)1.1 ACE
Blanche (South Pacific)1.0 ACE
Muifa (Western North Pacific)0.9 ACE
Arlene (North Atlantic)0.8 ACE
Don (North Atlantic)0.8 ACE
Maarutha (North Indian)0.8 ACE
Kirogi (Western North Pacific)0.7 ACE
Greg (South-West Indian)0.7 ACE
Bart (South Pacific)0.7 ACE
Emily (North Atlantic)0.6 ACE
Fernando (South-West Indian)0.6 ACE
Selma (Eastern North Pacific)0.6 ACE
Beatriz (Eastern North Pacific)0.6 ACE
Adrian (Eastern North Pacific)0.5 ACE
Bret (North Atlantic)0.5 ACE
Guchol (Western North Pacific)0.5 ACE
Jova (Eastern North Pacific)0.5 ACE
Roke (Western North Pacific)0.5 ACE
Ramon (Eastern North Pacific)0.4 ACE
Calvin (Eastern North Pacific)0.3 ACE
Philippe (North Atlantic)0.1 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 Lan 2017
DatePlacePositionWind
2017-10-22Open coast, place not named in the data34.7, 138.280 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.