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WESTERN PACIFIC · 2015 SEASON

Typhoon Atsani (2015)

Recorded track and intensity · 14 Aug 2015–29 Aug 2015

PEAK INTENSITYCategory 5
THE COMPLETE TRACKOpen in the explorer
ATSANI: complete recorded track, 14 Aug 2015–29 Aug 2015Recorded track from 14 Aug 2015 to 29 Aug 2015. Colors show the recorded wind category. The highlighted position follows the replay controls.JAPANPHILIPPINESTAIWANPacific Ocean14 Aug, 00:00 UTC15 Aug, 00:00 UTC16 Aug, 00:00 UTC17 Aug, 00:00 UTC18 Aug, 00:00 UTC19 Aug, 00:00 UTC20 Aug, 00:00 UTC21 Aug, 00:00 UTC22 Aug, 00:00 UTC23 Aug, 00:00 UTC24 Aug, 00:00 UTC25 Aug, 00:00 UTC26 Aug, 00:00 UTC27 Aug, 00:00 UTC28 Aug, 00:00 UTC29 Aug, 00:00 UTCPeak · Category 514 AUG29 AUG

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DepressionTropical stormCat 1Cat 2Cat 3Cat 4Cat 5Post-tropical
All times UTC

Wind speed & pressure

19 Aug, 12:00 UTC
Wind speed 140 ktPressure 918 hPa
0900809601601020kthPa14 Aug19 Aug24 Aug29 Aug

Forward speed & ACE

19 Aug, 12:00 UTC
Forward speed 10 ktCumulative ACE 17.40 10⁴ kt²
0015203040kt10⁴ kt²14 Aug19 Aug24 Aug29 Aug

Hover or tap either graph to follow the track. The slider controls both graphs. Each line uses its matching colored axis.

Forward speed measures the center’s motion. ACE accumulates squared one-minute winds at 00, 06, 12 and 18 UTC during tropical or subtropical stages at 34 kt or above. Missing observations make ACE partial. Missing measurements remain gaps.

Maximum sustained wind140 kt

161 mph / 259 km/h

Minimum recorded pressure918 hPa

19 Aug 2015 · tropical stage

Recorded track duration15.25 days

Full archive record, including non-tropical stages if present

Approximate track distance6,080 km

Along the recorded center positions

STORM HISTORY

Track and intensity summary

Atsani is listed in the Western Pacific basin for the 2015 season. Its archived track begins on 14 Aug 2015, 00:00 UTC at 14.8°N, 163.5°E. US-agency wind is not available for this first observation. These dates describe the available observations, which may include stages before and after the tropical cyclone phase.

The first Category 5 observation appears on 19 Aug 2015, 09:00 UTC. The highest recorded tropical-stage one-minute sustained wind is 140 knots (161 mph / 259 km/h), first recorded on 19 Aug 2015, 12:00 UTC at 19.7°N, 151.3°E. The minimum recorded tropical-stage central pressure is 918 hPa on 19 Aug 2015, 12:00 UTC.

The full record spans 366 hours and approximately 6,080 kilometers along the recorded center positions. The last recorded position is 47.7°N, 168.7°E on 29 Aug 2015, 06:00 UTC. The final tropical-stage observation is earlier, on 24 Aug 2015, 21:00 UTC.

This summary is calculated from the NOAA IBTrACS archive. Category 5 describes the storm’s peak recorded wind intensity, not its intensity at landfall or the severity of impacts at any location. Landfall times, damage and casualties have not been independently reviewed for this page.

METHODOLOGY

Data sources and limitations

The map and summary are generated from NOAA’s IBTrACS v04r01 archive. Wind and category use US-agency records; minimum pressure is calculated during the tropical stage, with the archive’s pressure source retained. Category 5 refers to the Saffir–Simpson one-minute wind scale; local agencies may use different classifications. Coastlines use Natural Earth’s 1:10m land data.

Track distance adds great-circle distances between consecutive observations, excluding gaps over 12 hours. This track has no gaps over 12 hours. The line shows the storm’s center, not its size, rainfall or flood extent. Converted wind speeds are rounded to the nearest whole unit.

Archive retrieved

NOAA IBTrACS archive · Field documentation

Sources & methodology

Browse all Category 5 storm pages