Short-lived Tropical Depression Six-E developed from a strong tropical wave that emerged off the west coast of Africa on 5 July. The wave moved westward but it was not until the 26 Ih that the convective activity and the surface circulation became organized in the eastern North Pacific, nearly 1000 n mi west-southwest of the southern tip of Baja California and about 360 n mi southwest of Tropical Depression Calvin. The system was then upgraded to tropical depression status based on a 32-knot wind speed from microwave imagery data. The depression moved toward the west-northwest and encountered strong vertical wind-shear. After a few convective bursts, it became a swirl of low clouds which gradually dissipated on 28 July. The best track of Tropical Depression Six-E is indicated in Table 1.
Table 1. Preliminary best track, Tropical Depression Six-E, 26-28 July, 1999 Date/Time
(UTC)Position Pressure
(mb)Wind Speed
(kt)Stage Lat. (°N) Lon. (°W) 26/1800 13.8 127.0 1006 25 tropical depression 27/0000 14.3 127.7 1006 30 " 0600 14.7 128.3 1005 30 " 1200 15.0 129.0 1006 25 " 1800 15.3 129.7 1007 25 " 28/0000 15.6 130.5 1008 20 dissipating   27/0600 14.7 128.3 1005 30 minimum pressure