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Hurricane Olivia Intermediate Advisory Number 39A
NWS Central Pacific Hurricane Center Honolulu HI   EP172018
200 AM HST Mon Sep 10 2018
 
...HURRICANE OLIVIA TRACKING WEST TOWARD HAWAII...
 
 
SUMMARY OF 200 AM HST...1200 UTC...INFORMATION
----------------------------------------------
LOCATION...21.7N 147.6W
ABOUT 500 MI...805 KM ENE OF HILO HAWAII
ABOUT 655 MI...1055 KM E OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...85 MPH...140 KM/H
PRESENT MOVEMENT...W OR 270 DEGREES AT 10 MPH...16 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 later today or tonight.
 
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 200 AM HST (1200 UTC), the center of Hurricane Olivia was located
near latitude 21.7 North, longitude 147.6 West. Olivia is moving
toward the west near 10 mph (16 km/h). This general motion is
expected to continue early today, followed by a turn toward the
west-southwest starting later today. 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 are near 85 mph (140 km/h) with higher
gusts. Little change in strength is forecast today, 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 will spread from east to
west across the Hawaiian Islands early this week. This will cause
surf to build along exposed east facing shorelines as Olivia
approaches. This surf may become damaging across parts of the state.
 
NEXT ADVISORY
-------------
Next complete advisory at 500 AM HST.
 
$$
Forecaster Houston
 
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