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BULLETIN
Tropical Storm Olivia Advisory Number  48
NWS Central Pacific Hurricane Center Honolulu HI   EP172018
500 AM HST Wed Sep 12 2018
 
...OLIVIA MOVING WEST AND NEARING MAUI AND MOLOKAI...
 
 
SUMMARY OF 500 AM HST...1500 UTC...INFORMATION
----------------------------------------------
LOCATION...21.2N 155.7W
ABOUT 55 MI...90 KM ENE OF KAHULUI HAWAII
ABOUT 140 MI...230 KM E OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H
PRESENT MOVEMENT...W OR 280 DEGREES AT 12 MPH...19 KM/H
MINIMUM CENTRAL PRESSURE...1005 MB...29.68 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:
 
The Tropical Storm Warning for Hawaii County is discontinued.
 
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 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 500 AM HST (1500 UTC), the center of Tropical Storm Olivia was
located near latitude 21.2 North, longitude 155.7 West. Olivia is
moving toward the west near 12 mph (19 km/h), and this motion is
expected to continue through this morning. A motion toward the
west-southwest is expected later today, with an increase in forward
speed. This general motion is then expected to continue the next
couple of days. 
 
Maximum sustained winds are near 45 mph (75 km/h) with higher gusts.
Some 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 1005 mb (29.68 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
WIND: Tropical storm conditions are expected in Maui County today.
Tropical storm conditions are expected to begin over Oahu later this
morning. 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. Up to 6 inches
of rain has already fallen over parts of Maui.
 
SURF: Large swells generated by Olivia will impact the main Hawaiian
Islands over the next couple of days. This will result in
dangerously high and potentially damaging surf, mainly along
exposed east facing shores.
 
 
NEXT ADVISORY
-------------
Next intermediate advisory at 800 AM HST.
Next complete advisory at 1100 AM HST.
 
$$
Forecaster Birchard
 
NNNN