Tropical Depression Nine-E spent its short lifetime far removed from any land
areas. The precursor disturbance was a tropical wave that moved off the
African coast on 27 July. The system entered the East Pacific on 6 August
and continued westward without development until the 11th, when
convection began to increase. Satellite classifications began on the
12th, and the system became a tropical depression at 1200 UTC on
the 13th. Under easterly shear, the depression moved on a
generally west-northwesterly track without significant additional
development, and subsequently dissipated by 1200 UTC on the 15th.
The "best-track" for the depression is given in Table 1.
Table 1.
Best track for Tropical Depression Nine-E, 13-15 August 1999.
Date/Time (UTC) |
Position |
Pressure (mb) |
Wind Speed (kt) |
Stage |
Lat. (°N) |
Lon. (°W) |
13/1200 | 13.7 | 115.8 | 1006 | 25 | tropical depression |
13/1800 | 14.2 | 117.0 | 1005 | 30 | " |
14/0000 | 14.7 | 118.0 | 1005 | 30 | " |
14/0600 | 14.8 | 118.5 | 1006 | 30 | " |
14/1200 | 14.9 | 119.0 | 1006 | 30 | " |
14/1800 | 15.2 | 119.5 | 1007 | 25 | " |
15/0000 | 15.5 | 120.0 | 1007 | 25 | " |
15/0600 | 15.6 | 120.8 | 1008 | 25 | " |
|
13/1800 | 14.2 | 117.0 | 1005 | 30 | minimum pressure |