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Tropical Weather Outlook
NWS National Hurricane Center Miami FL
1100 PM PDT Thu Jul 20 2017

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

The National Hurricane Center is issuing advisories on Tropical
Storm Greg, located several hundred miles southwest of the southern
tip of the Baja California peninsula.

1. Numerous showers and thunderstorms are associated with a broad area
of low pressure centered several hundred miles south of the
southern tip of the Baja California peninsula.  Environmental
conditions are forecast to be conducive for development of this
system while it moves westward to west-northwestward at around 10
mph, and a tropical depression is expected to form over the
weekend.
* Formation chance through 48 hours...high...70 percent.
* Formation chance through 5 days...high...90 percent.

2. Showers and thunderstorms associated with a tropical wave continue
to show signs of organization over the far eastern Pacific southwest
of Central America.  Environmental conditions are forecast to become
increasingly favorable for development, and a tropical depression is
expected to form by early next week while the system moves
west-northwestward at 10 to 15 mph.
* Formation chance through 48 hours...medium...50 percent.
* Formation chance through 5 days...high...90 percent.

Forecaster Zelinsky/Pasch