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BULLETIN
Hurricane Walaka Intermediate Advisory Number 10A
NWS Central Pacific Hurricane Center Honolulu HI   CP012018
800 PM HST Mon Oct 01 2018
 
...CATEGORY 5 HURRICANE WALAKA HEADING TOWARD JOHNSTON
ISLAND...
 
 
SUMMARY OF 800 PM HST...0600 UTC...INFORMATION
----------------------------------------------
LOCATION...13.4N 169.8W
ABOUT 225 MI...360 KM S OF JOHNSTON ISLAND
ABOUT 945 MI...1520 KM SW OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...160 MPH...260 KM/H
PRESENT MOVEMENT...NW OR 320 DEGREES AT 7 MPH...11 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 Watch is in effect for...
* Papahanaumokuakea Marine National Monument from Nihoa to French
Frigate Shoals to Maro Reef
 
A Hurricane Warning means that hurricane conditions are expected in
the warning area within 36 hours.
 
A Hurricane Watch means that hurricane conditions are possible
within the watch area within 48 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 800 PM HST (0600 UTC), the eye of Hurricane Walaka was located
near latitude 13.4 North, longitude 169.8 West. Walaka is moving
toward the northwest near 7 mph (11 km/h). A turn toward the north
is expected later 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 tonight before
Walaka starts a 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 (295 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 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 Island Tuesday.
 
 
NEXT ADVISORY
-------------
Next complete advisory at 1100 PM HST.
 
$$
Forecaster Jelsema
 
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