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Tropical Weather Outlook
NWS National Hurricane Center Miami FL
500 PM PDT Tue Sep 25 2018

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

The National Hurricane Center is issuing advisories on Tropical
Storm Rosa, located about 400 miles southwest of Manzanillo,
Mexico.

1. A trough of low pressure located a little over 1300 miles southeast
of Hilo, Hawaii continues to produce disorganized showers and
thunderstorms.  Some gradual development of this system is possible
through the end of the week while it moves westward across the
central Pacific.
* Formation chance through 48 hours...low...20 percent.
* Formation chance through 5 days...medium...50 percent.

2. An area of low pressure is expected to develop a few hundred miles
south or southwest of the Gulf of Tehuantepec in a couple of days.
Some gradual development of this system is possible after that time
while it moves westward to west-northwestward well off the coast of
Mexico.
* Formation chance through 48 hours...low...near 0 percent.
* Formation chance through 5 days...low...20 percent.

Public Advisories on Tropical Storm Rosa are issued under WMO header
WTPZ35 KNHC and under AWIPS header MIATCPEP5.
Forecast/Advisories on Tropical Storm Rosa are issued under WMO
header WTPZ25 KNHC and under AWIPS header MIATCMEP5.

Forecaster Zelinsky