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WESTERN PACIFIC · 2004 SEASON

Typhoon Dianmu (2004)

Recorded track and intensity · 11 Jun 2004–28 Jun 2004

PEAK INTENSITYCategory 5
THE COMPLETE TRACKOpen in the explorer
DIANMU: complete recorded track, 11 Jun 2004–28 Jun 2004Recorded track from 11 Jun 2004 to 28 Jun 2004. Colors show the recorded wind category. The highlighted position follows the replay controls.ASIAPacific Ocean12 Jun, 00:00 UTC13 Jun, 00:00 UTC14 Jun, 00:00 UTC15 Jun, 00:00 UTC16 Jun, 00:00 UTC17 Jun, 00:00 UTC18 Jun, 00:00 UTC19 Jun, 00:00 UTC20 Jun, 00:00 UTC21 Jun, 00:00 UTC22 Jun, 00:00 UTC23 Jun, 00:00 UTC24 Jun, 00:00 UTC25 Jun, 00:00 UTC26 Jun, 00:00 UTC27 Jun, 00:00 UTC28 Jun, 00:00 UTCPeak · Category 511 JUN28 JUN

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

Wind speed & pressure

16 Jun, 06:00 UTC
Wind speed 155 ktPressure 879 hPa
0860809401601020kthPa11 Jun17 Jun22 Jun28 Jun

Forward speed & ACE

16 Jun, 06:00 UTC
Forward speed 8 ktCumulative ACE 10.85 10⁴ kt²
0020204040kt10⁴ kt²11 Jun17 Jun22 Jun28 Jun

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 measurements remain gaps.

Maximum sustained wind155 kt

178 mph / 287 km/h

Minimum recorded pressure879 hPa

16 Jun 2004 · tropical stage

Recorded track duration16.63 days

Full archive record, including non-tropical stages if present

Approximate track distance8,380 km

Along the recorded center positions

STORM HISTORY

Track and intensity summary

Dianmu is listed in the Western Pacific basin for the 2004 season. Its archived track begins on 11 Jun 2004, 18:00 UTC at 6.5°N, 139.4°E. The first observation lists sustained winds of 15 knots. These dates describe the available observations, which may include stages before and after the tropical cyclone phase.

The first Category 5 observation appears on 15 Jun 2004, 18:00 UTC. The highest recorded tropical-stage one-minute sustained wind is 155 knots (178 mph / 287 km/h), first recorded on 16 Jun 2004, 06:00 UTC at 15.1°N, 136°E. The minimum recorded tropical-stage central pressure is 879 hPa on 16 Jun 2004, 06:00 UTC.

The full record spans 399 hours and approximately 8,380 kilometers along the recorded center positions. The last recorded position is 48.4°N, 179.2°E on 28 Jun 2004, 09:00 UTC. The final tropical-stage observation is earlier, on 21 Jun 2004, 15:00 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