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Hurricane WALAKA


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Hurricane Walaka Intermediate Advisory Number 9A
NWS Central Pacific Hurricane Center Honolulu HI   CP012018
200 PM HST Mon Oct 01 2018
 
...HURRICANE WALAKA REACHES CATEGORY 5 ON THE SAFFIR-SIMPSON
SCALE...
 
 
SUMMARY OF 200 PM HST...0000 UTC...INFORMATION
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LOCATION...12.9N 169.6W
ABOUT 265 MI...425 KM S OF JOHNSTON ISLAND
ABOUT 965 MI...1555 KM SW OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...160 MPH...260 KM/H
PRESENT MOVEMENT...WNW OR 295 DEGREES AT 9 MPH...15 KM/H
MINIMUM CENTRAL PRESSURE...920 MB...27.17 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 200 PM HST (0000 UTC), the eye of Hurricane Walaka was located
near latitude 12.9 North, longitude 169.6 West. Walaka is moving
toward the west-northwest near 9 mph (15 km/h). A turn toward the
north is expected late tonight through Tuesday with a gradual
increase in forward speed. On the forecast track, the center of
Walaka is expected to pass just to the west of Johnston Island on
Tuesday.
 
Maximum sustained winds are near 160 mph (260 km/h) with higher
gusts.  Walaka is a category 5 hurricane on the Saffir-Simpson
Hurricane Wind Scale.  Some strengthening is expected through
early Tuesday before Walaka starts a gradual weakening trend.
 
Hurricane-force winds extend outward up to 50 miles (85 km) from
the center and tropical-storm-force winds extend outward up to 185
miles (300 km).
 
The estimated minimum central pressure is 920 mb (27.17 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 Island 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 complete advisory at 500 PM HST.
 
$$
Forecaster Kodama
 
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