ZCZC HFOTCPCP1 ALL
TTAA00 PHFO DDHHMM
 
BULLETIN
Hurricane Walaka Advisory Number   9
NWS Central Pacific Hurricane Center Honolulu HI   CP012018
1100 AM HST Mon Oct 01 2018
 
...CATEGORY 4 HURRICANE WALAKA STILL INTENSIFYING FAR SOUTHWEST OF
HAWAII...
 
 
SUMMARY OF 1100 AM HST...2100 UTC...INFORMATION
-----------------------------------------------
LOCATION...12.9N 169.3W
ABOUT 265 MI...425 KM S OF JOHNSTON ISLAND
ABOUT 950 MI...1530 KM SW OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...150 MPH...240 KM/H
PRESENT MOVEMENT...NW OR 305 DEGREES AT 10 MPH...17 KM/H
MINIMUM CENTRAL PRESSURE...930 MB...27.47 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 1100 AM HST (2100 UTC), the eye of Hurricane Walaka was
located near latitude 12.9 North, longitude 169.3 West. Walaka is
moving toward the northwest near 10 mph (17 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 150 mph (240 km/h) with higher
gusts.  Walaka is a category 4 hurricane on the Saffir-Simpson
Hurricane Wind Scale.  Additional 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 160 miles
(260 km).
 
The estimated minimum central pressure is 930 mb (27.47 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
-------------
Next intermediate advisory at 200 PM HST.
Next complete advisory at 500 PM HST.
 
$$
Forecaster Kodama
 
NNNN