WESTERN PACIFIC · 2004 SEASON
Typhoon Chaba (2004)
Recorded track and intensity · 17 Aug 2004–5 Sept 2004
Drag to pan · Pinch or Ctrl/⌘ + scroll to zoom. Keyboard: plus or minus to zoom, arrow keys to pan, and 0 to show the full track.
Wind speed & pressure
23 Aug, 00:00 UTCForward speed & ACE
23 Aug, 00:00 UTCHover 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.
178 mph / 287 km/h
23 Aug 2004 · tropical stage
Full archive record, including non-tropical stages if present
Along the recorded center positions
STORM HISTORY
Track and intensity summary
Chaba is listed in the Western Pacific basin for the 2004 season. Its archived track begins on 17 Aug 2004, 00:00 UTC at 9.3°N, 172.3°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 22 Aug 2004, 18:00 UTC. The highest recorded tropical-stage one-minute sustained wind is 155 knots (178 mph / 287 km/h), first recorded on 23 Aug 2004, 00:00 UTC at 15.2°N, 143.6°E. The minimum recorded tropical-stage central pressure is 879 hPa on 23 Aug 2004, 00:00 UTC.
The full record spans 468 hours and approximately 9,820 kilometers along the recorded center positions. The last recorded position is 59.3°N, 151.7°E on 5 Sept 2004, 12:00 UTC. The final tropical-stage observation is earlier, on 30 Aug 2004, 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