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BULLETIN
Tropical Storm Olivia Intermediate Advisory Number 49A
NWS Central Pacific Hurricane Center Honolulu HI   EP172018
200 PM HST Wed Sep 12 2018
 
...OLIVIA PASSING SOUTH OF OAHU AND WEAKENING...
 
 
SUMMARY OF 200 PM HST...0000 UTC...INFORMATION
----------------------------------------------
LOCATION...20.6N 158.1W
ABOUT 45 MI...75 KM S OF HONOLULU HAWAII
ABOUT 70 MI...110 KM W OF KAUNAKAKAI HAWAII
MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H
PRESENT MOVEMENT...W OR 260 DEGREES AT 20 MPH...30 KM/H
MINIMUM CENTRAL PRESSURE...1007 MB...29.74 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:
 
None.
 
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
 
Interests in the Northwest Hawaiian Islands should monitor the
progress of Olivia.
 
A Tropical Storm Warning means that tropical storm conditions are
expected or occurring somewhere in the warning area.
 
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 PM HST (0000 UTC), the center of Tropical Storm Olivia was
located near latitude 20.6 North, longitude 158.1 West. Olivia is
moving toward the west near 20 mph. A turn toward the west-southwest
will occur this evening, with a similar west-southwest motion
expected through Friday.
 
Maximum sustained winds are near 40 mph (65 km/h) with higher
gusts. Gradual weakening is forecast during the next 48 hours.
 
Tropical-storm-force winds extend outward up to 90 miles (150 km)
from the center.
 
The estimated minimum central pressure is 1007 mb (29.74 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
WIND: Tropical storm conditions are ongoing in portions of Maui
County. Tropical storm conditions are expected over Oahu this
afternoon. Remember that wind gusts can be much stronger near higher
terrain, and in the upper floors of high-rise buildings. Winds can
also be especially gusty through gaps between mountains and where
winds blow downslope.
 
RAINFALL: Showers will continue to increase over the main Hawaiian
Islands today. Olivia is expected to produce total rainfall
accumulations of 5 to 10 inches in some areas, with isolated maximum
amounts of 15 inches possible, especially in higher terrain. This
rainfall may produce life-threatening flash flooding. Nearly 9
inches of rain has already fallen over parts of Maui.
 
SURF: Large swells generated by Olivia will impact the main Hawaiian
Islands into tonight. This will result in dangerously high and
potentially damaging surf, mainly along exposed east facing shores.
 
 
NEXT ADVISORY
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Next complete advisory at 500 PM HST.
 
$$
Forecaster Wroe
 
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