From the National Hurricane Center (NHC)
For the eastern North Pacific...east of 140 degrees west longitude:

1. South of the Southern Coast of Mexico (EP90):
Showers and thunderstorms are gradually becoming better organized
near a broad area of low pressure located several hundred miles
south of the coast of southern Mexico, but the system still lacks a
well-defined circulation. Environmental conditions are favorable
for further development, and a tropical depression or tropical storm
is expected to form tonight or on Wednesday as the low moves
generally west-northwestward at around 10 mph.
* Formation chance through 48 hours...high...near 100 percent.
* Formation chance through 7 days...high...near 100 percent.

NHC Image