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BULLETIN
Hurricane Olivia Advisory Number  38
NWS Central Pacific Hurricane Center Honolulu HI   EP172018
500 PM HST Sun Sep 09 2018
 
...TROPICAL STORM WATCH ISSUED AS OLIVIA CONTINUES MARCHING
TOWARD HAWAII...
 
 
SUMMARY OF 500 PM HST...0300 UTC...INFORMATION
----------------------------------------------
LOCATION...21.7N 146.1W
ABOUT 595 MI...960 KM ENE OF HILO HAWAII
ABOUT 760 MI...1220 KM E OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...75 MPH...120 KM/H
PRESENT MOVEMENT...W OR 270 DEGREES AT 12 MPH...19 KM/H
MINIMUM CENTRAL PRESSURE...988 MB...29.18 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:
 
A Tropical Storm Watch has been issued for Oahu, Maui, Molokai,
Lanai, Kahoolawe, and the Big Island.
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
 
A Tropical Storm Watch is in effect for...
* Oahu
* Maui County...including the islands of Maui, Molokai, Lanai, and
Kahoolawe
* Hawaii County
 
A tropical storm watch means that tropical storm conditions are
possible in the watch area. A watch is typically issued 48 hours
before the anticipated first occurence of tropical-storm-force
winds, conditions that make outside preparations difficult or
dangerous.
 
Interests on Kauai and Niihau should monitor the progress of Olivia.
 
For storm information specific to your area, please monitor
products issued by the National Weather Service office in
Honolulu Hawaii.
 
 
DISCUSSION AND OUTLOOK
----------------------
At 500 PM HST (0300 UTC), the center of Hurricane Olivia was located
near latitude 21.7 North, longitude 146.1 West. Olivia is moving
toward the west near 12 mph (19 km/h) and this motion is
expected to continue for the next 12 to 24 hours or so with some
slowing in forward speed. A west-southwest motion is expected to
begin later Monday. On the forecast track, Olivia will be
approaching the main Hawaiian Islands later Tuesday and Tuesday
night.

Maximum sustained winds are near 75 mph (120 km/h) with higher
gusts. Little change in strength is forecast during the next 36
hours, with gradual weakening expected afterward.
 
Hurricane-force winds extend outward up to 25 miles (35 km) from the
center and tropical-storm-force winds extend outward up to 125 miles
(205 km).
 
The estimated minimum central pressure is 988 mb (29.18 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
 
WIND:  Tropical storm conditions are possible within the watch area
starting Tuesday.
 
RAINFALL:  Storm total rainfall amounts of 10 to 15 inches, with
isolated amounts over 20 inches, are possibile associated with
Olivia.
 
SURF: Large swells generated by Olivia are expected to continue to
increase near the main Hawaiian Islands. Surf will to build as
Olivia approaches, and may become damaging on some exposed east
facing shores Tuesday or Wednesday.
 
NEXT ADVISORY
-------------
Next intermediate advisory at 800 PM HST.
Next complete advisory at 1100 PM HST.
 
$$
Forecaster R Ballard
 
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