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BULLETIN
Hurricane Willa Advisory Number   5
NWS National Hurricane Center Miami FL       EP242018
300 AM MDT Sun Oct 21 2018

...WILLA RAPIDLY INTENSIFIES INTO A HURRICANE SOUTHWEST OF MEXICO...
...EXPECTED TO BECOME A MAJOR HURRICANE BY MONDAY MORNING...


SUMMARY OF 300 AM MDT...0900 UTC...INFORMATION
----------------------------------------------
LOCATION...16.2N 106.5W
ABOUT 240 MI...390 KM SW OF MANZANILLO MEXICO
MAXIMUM SUSTAINED WINDS...85 MPH...140 KM/H
PRESENT MOVEMENT...NW OR 315 DEGREES AT 7 MPH...11 KM/H
MINIMUM CENTRAL PRESSURE...984 MB...29.06 INCHES


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

Interests along the coasts of west-central and southwestern mainland
Mexico should monitor the progress of Willa.


DISCUSSION AND OUTLOOK
----------------------
At 300 AM MDT (0900 UTC), the center of Hurricane Willa was located
near latitude 16.2 North, longitude 106.5 West. Willa is moving
toward the northwest near 7 mph (11 km/h), and this general motion
is expected to continue through early Sunday.  A turn toward the
north-northwest and north is expected by late Sunday and Monday.
Willa is expected to accelerate toward the northeast and approach
the coast of west-central mainland Mexico by late Tuesday.

Maximum sustained winds have increased to near 85 mph (140 km/h)
with higher gusts. Rapid strengthening is forecast during the next
day or so, and Willa is expected to become a major hurricane by
Monday morning.

Willa is a small tropical cyclone. Hurricane-force winds only
extend outward up to 10 miles (20 km) from the center and
tropical-storm-force winds only extend outward up to 45 miles
(75 km).

The estimated minimum central pressure is 984 mb (29.06 inches).


HAZARDS AFFECTING LAND
----------------------
SURF:  Swells generated by Willa should begin to affect portions of
the coast of southwestern and west-central Mexico by Monday.  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 900 AM MDT.

$$
Forecaster Stewart

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