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BULLETIN
Tropical Storm Olivia Advisory Number  49
NWS Central Pacific Hurricane Center Honolulu HI   EP172018
1100 AM HST Wed Sep 12 2018
 
...OLIVIA MAKES BRIEF LANDFALL OVER NORTHWEST MAUI AND THEN OVER
LANAI AS IT MOVES WESTWARD...
 
 
SUMMARY OF 1100 AM HST...2100 UTC...INFORMATION
-----------------------------------------------
LOCATION...20.9N 157.1W
ABOUT 40 MI...60 KM W OF KAHULUI HAWAII
ABOUT 60 MI...95 KM ESE OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H
PRESENT MOVEMENT...W OR 265 DEGREES AT 15 MPH...24 KM/H
MINIMUM CENTRAL PRESSURE...1005 MB...29.68 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 1100 AM HST (2100 UTC), the center of Tropical Storm Olivia was
located near latitude 20.9 North, longitude 157.1 West, which is
just west of the island of Lanai. Olivia is moving toward the west
near 15 mph. A turn toward the west-southwest will occur today,
with a similar west-southwest motion expected through Friday.
 
Maximum sustained winds are near 45 mph (75 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 1005 mb (29.68 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
WIND: Tropical storm conditions are ongoing in 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 8
inches of rain has already fallen over parts of Maui.
 
SURF: Large swells generated by Olivia will impact the main Hawaiian
Islands through tonight. This will result in dangerously high and
potentially damaging surf, mainly along exposed east facing shores.
 
 
NEXT ADVISORY
-------------
Next intermediate advisory at 200 PM HST.
Next complete advisory at 500 PM HST.
 
$$
Forecaster Wroe
 
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