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Tropical Storm Olivia Intermediate Advisory Number 45A...Corrected
NWS Central Pacific Hurricane Center Honolulu HI EP172018
200 PM HST Tue Sep 11 2018
...WINDS INCREASING OVER MAUI COUNTY AND THE BIG ISLAND AS OLIVIA
SUMMARY OF 200 PM HST...0000 UTC...INFORMATION
ABOUT 135 MI...215 KM NE OF HILO HAWAII
ABOUT 260 MI...420 KM E OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...55 MPH...90 KM/H
PRESENT MOVEMENT...WSW OR 255 DEGREES AT 21 MPH...34 KM/H
MINIMUM CENTRAL PRESSURE...1002 MB...29.59 INCHES
WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY:
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A Tropical Storm Warning is in effect for...
* Kauai County...including the islands of Kauai and Niihau
* Maui County...including the islands of Maui, Molokai, Lanai, and
* 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
DISCUSSION AND OUTLOOK
At 200 PM HST (0000 UTC), the center of Tropical Storm Olivia was
located near latitude 21.2 North, longitude 153.8 West. Olivia is
moving toward the west-southwest near 21 mph (34 km/h). 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 55 mph (90 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 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 1002 mb (29.59 inches).
HAZARDS AFFECTING LAND
WIND: Tropical storm conditions are expected over portions of
Maui County and the Big Island 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. Wind gusts can be much stronger near
higher terrain, particularly through gaps between mountains and
where winds blow downslope.
RAINFALL: Showers will continue to increase over portions of the
main Hawaiian Islands late this afternoon and evening 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 complete advisory at 500 PM HST.
Forecaster R Ballard