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