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Tropical Cyclone Report

Tropical Depression Ten

7 - 9 September 2004

Richard J. Pasch
National Hurricane Center
21 November 2004

This depression originated from a tropical wave that crossed the coast of Africa on 29 August. The wave was accompanied by a well-organized area of disturbed weather that passed just north of the Cape Verde Islands early on 30 August. The disturbance moved westward over the eastern Atlantic for a couple of days, and then turned northwestward, northward, and northeastward while becoming less organized. However, on 7 September, a low-level circulation was evident, and although southwesterly shear was displacing most of the thunderstorms from the center, the deep convection was sufficiently close to the center to qualify the system as a tropical depression by 1200 UTC that day, while centered about 630 n mi southwest of the westernmost Azores. The cyclone did not strengthen significantly, since deep convection continued to be sheared northeastward from the center. Early on 9 September, the depression's motion became slow and erratic. Meanwhile, deep convection had become sheared far enough away from the center to cause the system to degenerate to a remnant low by 1200 UTC that day. The low turned southeastward and east-southeastward, and dissipated around 1800 UTC 10 September, about 230 miles west-southwest of the southernmost Azores. Table 1 lists the "best track" of this tropical cyclone, and Figure 1 displays this best track.



Table 1: Best track for Tropical Depression Ten, 7-9 September 2004.
Date/Time
(UTC)
PositionPressure
(mb)
Wind Speed
(kt)
Stage
Lat.
(°N)
Lon.
(°W)
 07 / 1200 31.5 39.7 1009 25 tropical depression
 07 / 1800 31.7 39.3 1009 25 "
 08 / 0000 32.0 38.7 1010 25 "
 08 / 0600 32.3 38.1 1011 25 "
 08 / 1200 32.8 37.1 1012 25 "
 08 / 1800 33.8 36.0 1012 25 "
 09 / 0000 35.3 35.0 1012 30 "
 09 / 0600 36.2 34.3 1013 30 "
 09 / 1200 36.5 33.6 1013 30 remnant low
 09 / 1800 36.0 33.4 1014 30 "
 10 / 0000 35.7 32.3 1014 30 "
 10 / 0600 35.5 31.0 1015 25 "
 10 / 1200 35.3 29.5 1016 20 "
 10 / 1800     dissipated
 07 / 1200 31.5 39.7 1009 25 minimum pressure
 09 / 0000 35.3 35.0 1012 30 maximum intensity

Figure 1: Best track positions for Tropical Depression Ten, 7-9 September 2004.


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Page last modified: Tuesday, 15-Mar-2005 21:06:17 UTC