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Tropical Weather Outlook
NWS National Hurricane Center Miami FL
1100 PM PDT Wed Sep 20 2017

For the eastern North Pacific...east of 140 degrees west longitude:

1. Shower and thunderstorm activity associated with a broad area of low
pressure located just offshore of the southwest coast of Mexico
has increased, but remains disorganized.  Environmental conditions
are expected to be conducive for gradual development, and a tropical
depression is likely to form in two to three days as the system
moves slowly toward the west-northwest.  Regardless of tropical
cyclone formation, heavy rains are expected over portions of
southern Mexico during the next several days.
* Formation chance through 48 hours...medium...60 percent.
* Formation chance through 5 days...high...80 percent.

Forecaster Zelinsky