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Hurricane Walaka Advisory Number 8
NWS Central Pacific Hurricane Center Honolulu HI CP012018
500 AM HST Mon Oct 01 2018
...WALAKA CONTINUES TO RAPIDLY INTENSIFY FAR SOUTHWEST OF HAWAII...
SUMMARY OF 500 AM HST...1500 UTC...INFORMATION
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LOCATION...12.3N 168.3W
ABOUT 315 MI...505 KM SSE OF JOHNSTON ISLAND
ABOUT 925 MI...1490 KM SW OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...125 MPH...205 KM/H
PRESENT MOVEMENT...WNW OR 295 DEGREES AT 10 MPH...17 KM/H
MINIMUM CENTRAL PRESSURE...954 MB...28.17 INCHES
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:
None.
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A Hurricane Warning is in effect for...
* Johnston Atoll
A Hurricane Warning means that hurricane conditions are expected in
the warning area. A warning is typically issued 36 hours before the
anticipated first occurrence of tropical-storm force winds,
conditions that make outside preparations difficult or dangerous.
Interests in the Papahanaumokuakea Marine National Monument should
monitor the progress of Walaka.
DISCUSSION AND OUTLOOK
----------------------
At 500 AM HST (1500 UTC), the center of Hurricane Walaka was located
near latitude 12.3 North, longitude 168.3 West. Walaka is moving
toward the west-northwest near 10 mph (17 km/h). A turn toward
the northwest is expected to begin later today, followed by a turn
toward the north late tonight through Tuesday night with a gradual
increase in forward speed.
Maximum sustained winds are near 125 mph (205 km/h) with higher
gusts. Walaka is a category 3 hurricane on the Saffir-Simpson
Hurricane Wind Scale. Rapid intensification is expected to
continue today into tonight, with little change in intensity
forecast Tuesday and Tuesday night.
Hurricane-force winds extend outward up to 35 miles (55 km) from the
center and tropical-storm-force winds extend outward up to 140 miles
(220 km).
The estimated minimum central pressure is 954 mb (28.17 inches).
HAZARDS AFFECTING LAND
----------------------
WIND: Tropical Storm force winds are expected across Johnston Island
starting late tonight or early Tuesday, with Hurricane conditions
expected by Tuesday afternoon.
SURF: Large surf will affect the Johnston Atoll reefs and shorelines
starting later today.
RAINFALL: Heavy rainfall associated with Walaka is expected to reach
Johnston Atoll late today or tonight.
NEXT ADVISORY
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Next intermediate advisory at 800 AM HST.
Next complete advisory at 1100 AM HST.
$$
Forecaster Jelsema
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