2007 Western Pacific typhoon season
Typhoon Sepat 2007
Sepat crossed Taiwan and continued into China after reaching Category 5 strength over the western Pacific. The typhoon also intensified monsoon rain in the Philippines while its center remained offshore.
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.
161 mph
Aug 15, 2007 during the tropical stage
Full archive record, including non-tropical stages if present
Along the recorded center positions
STORM HISTORY
A powerful approach to Taiwan
Sepat began as a developing low southeast of Naha on August 11 and received its name the following day. It strengthened over the western Pacific, with archived sustained winds reaching 140 knots on August 15. In the Philippines, the storm was known as Egay.
An eyewall replacement cycle weakened Sepat before it reached Taiwan. Landfall came late on August 17 UTC, already August 18 locally, at Category 3 strength. Crossing the island further disrupted the circulation before it emerged into the Taiwan Strait.
China landfall and monsoon rain
Sepat reached China on August 18 at Category 1 strength, then weakened inland. Its remnant circulation persisted until August 24. South of the main track, the cyclone enhanced the southwest monsoon over the Philippines, where flooding caused three drowning deaths. That remote rainfall impact extended the storm's reach beyond the areas crossed by its center.
Further reading
QUICK ANSWERS
Sepat in brief
What was Typhoon Sepat's highest wind speed?
161 mph, the highest one-minute sustained wind in its tropical stage, recorded on Aug 15, 2007, 06:00 PM UTC.
What category was Typhoon Sepat?
Category 5 at its peak on the Saffir–Simpson one-minute wind scale, first reaching Category 5 on Aug 15, 2007, 03:00 PM UTC. Other agencies classify storms differently.
What was Typhoon Sepat's lowest pressure?
918 mb, the minimum central pressure recorded during its tropical stage, on Aug 15, 2007, 06:00 PM UTC.
When did Typhoon Sepat occur?
The archived track runs from Aug 11, 2007, 12:00 AM UTC to Aug 24, 2007, 06:00 AM UTC, with the tropical stage from Aug 12, 2007, 12:00 AM UTC to Aug 20, 2007, 09:00 AM UTC.
Where did Typhoon Sepat form?
In the Western Pacific basin, in the 2007 season. Its first archived position is 18.6°N, 136.1°E on Aug 11, 2007, 12:00 AM UTC.
Did Typhoon Sepat make landfall?
The archive places its center over land at 2 recorded positions; the strongest is 115 mph on Aug 18, 2007, 12:00 AM UTC. Positions are six-hourly, so this is not a landfall chronology.
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 and Field documentation
Sources & methodology