Tag Archives: Tropical Depression 22E

Tropical Depression 22E Forms Southwest of Mexico

A small center of circulation formed within a larger area of thunderstorms southwest of Mexico on Monday and the National Hurricane Center designated the system as Tropical Depression 22E.  At 4:00 p.m. EST on Monday the center of Tropical Depression 22E (TD22E) was located at latitude 10.8°N and longitude 102.9°W which put it about 465 miles (750 km) south-southwest of Acapulco, Mexico.  TD22E was moving toward the west at 18 m.p.h. (30 km/h).  The maximum sustained wind speed was 35 m.p.h. (55 km/h) and there were gusts to 45 m.p.h. (70 km/h).  The minimum surface pressure was 1005 mb.

TD22E is still in the early stages of an organizational process.  The small center of circulation is located near the western end of a long band of thunderstorms.  There are not many thunderstorms south and west of the center and there is not much evidence of spiral bands.  A subtropical ridge northeast of TD22E is pushing the depression quickly toward the west and its rapid movement is retarding the organizational process.

TD22E is currently in an environment that is marginal for intensification.  It is over water where the Sea Surface Temperature (SST) is near 30°C, which is very favorable for intensification.  However, the ridge northeast of TD22E is causing strong easterly winds to blow over the top of the depression.  The strong vertical wind shear and the rapid motion of the depression are negative factors for intensification.

As TD22E moves farther west, the vertical wind shear is expected to decrease and the depression is expected to move more slowly.  When that happens, TD22E will be able to more efficiently use the energy it is getting from the warm water and it will intensify.  A period of rapid intensification may occur once the core of the circulation is better organized.  TD22E could become a tropical storm on Tuesday and it could become a hurricane later this week.

The subtropical ridge is steering TD22E quickly toward the west.  In another 24 to 36 hours TD22E is likely to reach the western end of the ridge.  At that time it will slow down and turn toward the north.  TD22E will encounter southwesterly winds when it moves farther north.  Those winds will push TD22E toward the northeast later this week.  On its anticipated track TD22E could be near the southern tip of Baja California by the end of the week.