000
ABPZ20 KNHC 211131
TWOEP 

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
500 AM PDT Fri Jul 21 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.

A broad area of low pressure centered several hundred miles south
of the southern tip of the Baja California peninsula is producing
disorganized showers and thunderstorms.  Environmental conditions
are forecast to be conducive for the formation of a tropical
depression during the next couple of days before upper-level winds
become unfavorable for development. This system is forecast to move
westward to west-northwestward at around 10 mph through early next
week.
* Formation chance through 48 hours...high...70 percent.
* Formation chance through 5 days...high...80 percent.

Showers and thunderstorms have become better organized in
association with a tropical wave over the far eastern Pacific
southwest of Central America.  Environmental conditions are
forecast to become increasingly favorable for development, and a
tropical depression is likely to form later today or tomorrow while
the system moves west-northwestward at 10 to 15 mph.
* Formation chance through 48 hours...high...70 percent.
* Formation chance through 5 days...high...90 percent.

$$
Forecaster Blake