Tropical Cyclone Report

Tropical Depression Four-E

(EP042007)

9-11 July 2007

Jack Beven

National Hurricane Center

28 August 2007

Tropical Depression Four-E originated from a tropical wave that moved
westward from the coast of Africa on 23 June and reached the eastern
Pacific by 3 July. Associated shower and thunderstorm activity increased
on 6 July, with the system showing additional signs of organization the
next day. After a period of slow development which may have included a
northward re-formation of the system center, a tropical depression
formed near 1800 UTC 9 July about 610 n mi southwest of Cabo San Lucas,
Mexico. The depression moved northwestward over cooler waters under the
influence of southwesterly vertical wind shear. This combination caused
the system to degenerate to a non-convective remnant low on 11 July
about 790 n mi west-southwest of Cabo San Lucas. The low dissipated
later that day.

Table 1. Best track for Tropical Depression Four-E, 9 -- 11 July 2007.

+---------+---------+---------+-----------+-----------+--------------+
| Da      | L       | Lo      | Pressure  | Wind      | Stage        |
| te/Time | atitude | ngitude |           | Speed     |              |
|         |         |         | (mb)      |           |              |
| (UTC)   | \(N\)   | \(W\)   |           | (kt)      |              |
+---------+---------+---------+-----------+-----------+--------------+
| 09 /    | 17.0    | 118.6   | 1006      | 30        | tropical     |
| 1800    |         |         |           |           | depression   |
+---------+---------+---------+-----------+-----------+--------------+
| 10 /    | 17.5    | 119.3   | 1006      | 30        | \"           |
| 0000    |         |         |           |           |              |
+---------+---------+---------+-----------+-----------+--------------+
| 10 /    | 18.1    | 120.1   | 1006      | 30        | \"           |
| 0600    |         |         |           |           |              |
+---------+---------+---------+-----------+-----------+--------------+
| 10 /    | 18.8    | 120.9   | 1006      | 30        | \"           |
| 1200    |         |         |           |           |              |
+---------+---------+---------+-----------+-----------+--------------+
| 10 /    | 19.0    | 121.6   | 1006      | 25        | \"           |
| 1800    |         |         |           |           |              |
+---------+---------+---------+-----------+-----------+--------------+
| 11 /    | 19.0    | 122.5   | 1007      | 25        | \"           |
| 0000    |         |         |           |           |              |
+---------+---------+---------+-----------+-----------+--------------+
| 11 /    | 19.2    | 123.4   | 1008      | 25        | remnant low  |
| 0600    |         |         |           |           |              |
+---------+---------+---------+-----------+-----------+--------------+
| 11 /    | 19.4    | 124.3   | 1008      | 25        | \"           |
| 1200    |         |         |           |           |              |
+---------+---------+---------+-----------+-----------+--------------+
| 11 /    | 19.6    | 125.1   | 1009      | 20        | \"           |
| 1800    |         |         |           |           |              |
+---------+---------+---------+-----------+-----------+--------------+
| 12 /    |         |         |           |           | dissipated   |
| 0000    |         |         |           |           |              |
+---------+---------+---------+-----------+-----------+--------------+
| 09 /    | 17.0    | 118.6   | 1006      | 30        | minimum      |
| 1800    |         |         |           |           | pressure     |
+---------+---------+---------+-----------+-----------+--------------+