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BULLETIN
Hurricane Olivia Advisory Number  39
NWS Central Pacific Hurricane Center Honolulu HI   EP172018
1100 PM HST Sun Sep 09 2018
 
...HURRICANE OLIVIA INTENSIFIES AS IT TRACKS TOWARD HAWAII...
 
 
SUMMARY OF 1100 PM HST...0900 UTC...INFORMATION
-----------------------------------------------
LOCATION...21.7N 146.9W
ABOUT 545 MI...880 KM ENE OF HILO HAWAII
ABOUT 705 MI...1140 KM E OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...85 MPH...140 KM/H
PRESENT MOVEMENT...W OR 270 DEGREES AT 9 MPH...15 KM/H
MINIMUM CENTRAL PRESSURE...980 MB...28.94 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 1100 PM HST (0900 UTC), the center of Hurricane Olivia was
located near latitude 21.7 North, longitude 146.9 West. Olivia is
moving toward the west near 9 mph (15 km/h). This general motion is
expected to continue through early Monday, followed by a turn
toward the west-southwest starting late Monday. This west-southwest
motion is expected to continue through Tuesday evening. On this
forecast track, tropical storm conditions are possible over some
parts of Hawaii starting Tuesday.
 
Maximum sustained winds measured by Hurricane Hunter aircraft are
near 85 mph (140 km/h) with higher gusts. Little change in strength
is forecast through late Monday, with gradual weakening possible
starting some time on Tuesday.
 
Hurricane-force winds extend outward up to 30 miles (45 km) from the
center and tropical-storm-force winds extend outward up to 120 miles
(195 km).
 
The estimated minimum central pressure is 980 mb (28.94 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
 
WIND: Tropical storm conditions are possible within the watch area
starting Tuesday.
 
RAINFALL: Olivia is expected to produce total rainfall accumulations
of 10 to 15 inches. Isolated maximum amounts of 20 inches are
possible, especially over windward sides of Maui and the Big Island.
This rainfall may produce life-threatening flash flooding.
 
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 along some exposed east
facing shorelines starting Tuesday or Wednesday.
 
NEXT ADVISORY
-------------
Next intermediate advisory at 200 AM HST.
Next complete advisory at 500 AM HST.
 
$$
Forecaster Houston
 
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