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BULLETIN
Tropical Storm Rosa Advisory Number   4
NWS National Hurricane Center Miami FL       EP202018
900 PM MDT Tue Sep 25 2018

...ROSA QUICKLY STRENGTHENING...
...EXPECTED TO BECOME A HURRICANE OVERNIGHT...


SUMMARY OF 900 PM MDT...0300 UTC...INFORMATION
----------------------------------------------
LOCATION...15.1N 109.7W
ABOUT 445 MI...720 KM SW OF MANZANILLO MEXICO
MAXIMUM SUSTAINED WINDS...65 MPH...100 KM/H
PRESENT MOVEMENT...WNW OR 285 DEGREES AT 9 MPH...15 KM/H
MINIMUM CENTRAL PRESSURE...997 MB...29.44 INCHES


WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.


DISCUSSION AND OUTLOOK
----------------------
At 900 PM MDT (0300 UTC), the center of Tropical Storm Rosa was
located near latitude 15.1 North, longitude 109.7 West. Rosa is
moving toward the west-northwest near 9 mph (15 km/h), and this
general motion is expected to continue for the next several days.

Maximum sustained winds have increased to near 65 mph (100 km/h)
with higher gusts.  Rapid strengthening is anticipated, and Rosa is
forecast to become a hurricane overnight and could become a major
hurricane by Thursday.

Tropical-storm-force winds extend outward up to 60 miles (95 km)
from the center.

The estimated minimum central pressure is 997 mb (29.44 inches).


HAZARDS AFFECTING LAND
----------------------
SURF:  Swells generated by Rosa will affect portions of the coast of
southwestern Mexico and the southern Baja California Peninsula later
this week into the upcoming weekend.  These swells are likely to
cause life-threatening surf and rip current conditions. Please
consult products from your local weather office.


NEXT ADVISORY
-------------
Next complete advisory at 300 AM MDT.

$$
Forecaster Zelinsky

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