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BULLETIN
Hurricane Olivia Intermediate Advisory Number 38A
NWS Central Pacific Hurricane Center Honolulu HI   EP172018
800 PM HST Sun Sep 09 2018
 
...HURRICANE OLIVIA CONTINUES TO TRACK TOWARD HAWAII...
...A TROPICAL STORM WATCH REMAINS IN EFFECT FOR MOST OF HAWAII...
 
 
SUMMARY OF 800 PM HST...0600 UTC...INFORMATION
----------------------------------------------
LOCATION...21.7N 146.5W
ABOUT 570 MI...915 KM ENE OF HILO HAWAII
ABOUT 730 MI...1175 KM E OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...75 MPH...120 KM/H
PRESENT MOVEMENT...W OR 270 DEGREES AT 11 MPH...19 KM/H
MINIMUM CENTRAL PRESSURE...983 MB...29.03 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:
 
None.
 
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 occurrence of tropical-storm-force
winds, conditions that make outside preparations difficult or
dangerous. 

A Tropical Storm Warning may be required for some areas that are in
the watch area on Monday.
 
Interests on Kauai and Niihau should closely 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 800 PM HST (0600 UTC), the center of Hurricane Olivia was located
near latitude 21.7 North, longitude 146.5 West. Olivia is moving
toward the west near 11 mph (18 km/h). This general motion is
expected to continue through early Monday, with some slowing in
forward speed. A west-southwest motion is expected starting late
Monday. On the forecast track, the outer circulation of Olivia will
likely approach the main Hawaiian Islands on Tuesday, with tropical
storm conditions possible over some areas starting Tuesday night.
 
Maximum sustained winds are near 75 mph (120 km/h) with higher
gusts. Little change in strength is forecast through Monday night,
with gradual weakening possible starting some time on Tuesday.
 
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 based on a recent 
observation from a Hurricane Hunter aircraft is 983 mb (29.03
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 possible associated with
Olivia.
 
SURF: Large swells generated by Olivia are expected to continue to
increase across the main Hawaiian Islands. Surf will build as
Olivia approaches, and may become damaging on some exposed east
facing shores starting Tuesday or Wednesday.
 
NEXT ADVISORY
-------------
Next complete advisory at 1100 PM HST.
 
$$
Forecaster Houston
 
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