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BULLETIN
Tropical Storm Olivia Advisory Number  45
NWS Central Pacific Hurricane Center Honolulu HI   EP172018
1100 AM HST Tue Sep 11 2018
 
...OLIVIA SPEEDS UP AND IS CLOSING IN ON THE MAIN HAWAIIAN
ISLANDS...
...INCREASING WINDS AND SHOWERS EXPECTED THIS AFTERNOON...
 
 
SUMMARY OF 1100 AM HST...2100 UTC...INFORMATION
-----------------------------------------------
LOCATION...21.6N 152.3W
ABOUT 275 MI...440 KM E OF KAHULUI HAWAII
ABOUT 360 MI...580 KM E OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/H
PRESENT MOVEMENT...W OR 270 DEGREES AT 17 MPH...28 KM/H
MINIMUM CENTRAL PRESSURE...1000 MB...29.53 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:
 
A Tropical Storm Warning has been issued for Kauai and Niihau.
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
 
A Tropical Storm Warning is in effect for...
* Kauai County...including the islands of Kauai and Niihau
* Oahu
* Maui County...including the islands of Maui, Molokai, Lanai, and
Kahoolawe
* Hawaii County
 
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 within 36 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 1100 AM HST (2100 UTC), the center of Tropical Storm Olivia was
located near latitude 21.6 North, longitude 152.3 West. Olivia is
moving toward the west near 17 mph (28 km/h). A slight turn toward
the west-southwest is expected later today. This general motion
will then continue for the next couple of days. On the forecast
track, Olivia will be moving across the main Hawaiian Islands
tonight and Wednesday.
 
Maximum sustained winds are near 60 mph (95 km/h) with higher gusts.
Some weakening is forecast during the next 48 hours. Gradual 
weakening is forecast during the next 48 hours, but Olivia is 
expected to remain a tropical storm as it moves over the main 
Hawaiian Islands.

Tropical-storm-force winds extend outward up to 90 miles (150 km)
from the center.
 
The estimated minimum central pressure is 1000 mb (29.53 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
WIND: Winds will increase over parts of the main Hawaiian
Islands this afternoon as Olivia approaches. Wind gusts can be much
stronger near higher terrain, particularly through gaps between
mountains and where winds blow downslope. Tropical storm conditions
are expected over portions of Maui County and the Big Island
starting later today or tonight. Tropical storm conditions are
expected over Oahu starting tonight. Tropical storm conditions are
possible over Kauai County starting late tonight or Wednesday
morning.
 
RAINFALL: Showers will continue to increase over portions of the
main Hawaiian Islands today ahead of Tropical Storm Olivia.
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.
 
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 200 PM HST.
Next complete advisory at 500 PM HST.
 
$$
Forecaster R Ballard
 
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