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BULLETIN
Tropical Storm Olivia Advisory Number  42
NWS Central Pacific Hurricane Center Honolulu HI   EP172018
500 PM HST Mon Sep 10 2018
 
...OLIVIA DRAWING CLOSER TO THE MAIN HAWAIIAN ISLANDS WHILE SLOWLY
WEAKENING...
 
 
SUMMARY OF 500 PM HST...0300 UTC...INFORMATION
----------------------------------------------
LOCATION...21.9N 149.7W
ABOUT 380 MI...610 KM ENE OF HILO HAWAII
ABOUT 530 MI...850 KM E OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...70 MPH...110 KM/H
PRESENT MOVEMENT...W OR 280 DEGREES AT 10 MPH...17 KM/H
MINIMUM CENTRAL PRESSURE...991 MB...29.27 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:
 
A Tropical Storm Warning has been issued for Oahu.
 
A Tropical Storm Watch has been issued for Kauai and Niihau.
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
 
A Tropical Storm Warning is in effect for...
* Oahu
* Maui County...including the islands of Maui, Molokai, Lanai, and
Kahoolawe
* Hawaii County
 
A Tropical Storm Watch is in effect for...
* Kauai County...including the islands of Kauai and Niihau.
 
A Tropical Storm Warning means that tropical storm conditions are
expected somewhere in the warning area within 36 hours.
 
A Tropical Storm Watch means that tropical storm conditions are
possible in the watch area within 48 hours.
 
 
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 Tropical Storm Olivia was
located near latitude 21.9 North, longitude 149.7 West. Olivia is
moving toward the west near 10 mph (17 km/h). A continued west to
west-southwest motion is expected for the next few days. On the
forecast track, Olivia will be moving over the main Hawaiian Islands
late Tuesday night into Wednesday.
 
Maximum sustained winds are near 70 mph (110 km/h) with higher
gusts.  Gradual weakening is forecast during the next 48 hours, but
Olivia is expected to remain a tropical storm as it moves across
the islands.
 
Tropical-storm-force winds extend outward up to 90 miles (150 km)
from the center.
 
The estimated minimum central pressure is 991 mb (29.27 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
WIND: Tropical storm conditions are expected over Maui County and
the Big Island starting late Tuesday or Tuesday night. Tropical
storm conditions are expected over Oahu starting late Tuesday night
or Wednesday morning. Tropical storm conditions are possible over
Kauai County starting Wednesday afternoon.
 
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 sections of Maui County 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 over the next couple of days. This
will cause surf to build along exposed east facing shorelines as
Olivia approaches. This surf may become damaging across parts of the
state. See the High Surf Warning from National Weather Service
Honolulu for more information.
 
 
NEXT ADVISORY
-------------
Next intermediate advisory at 800 PM HST.
Next complete advisory at 1100 PM HST.
 
$$
Forecaster R Ballard
 
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