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BULLETIN
Hurricane Walaka Intermediate Advisory Number 7A
NWS Central Pacific Hurricane Center Honolulu HI   CP012018
200 AM HST Mon Oct 01 2018
 
...WALAKA BECOMES A MAJOR HURRICANE FAR SOUTHWEST OF HAWAII...
 
 
SUMMARY OF 200 AM HST...1200 UTC...INFORMATION
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LOCATION...12.1N 167.9W
ABOUT 335 MI...540 KM SSE OF JOHNSTON ISLAND
ABOUT 915 MI...1475 KM SW OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...115 MPH...185 KM/H
PRESENT MOVEMENT...WNW OR 290 DEGREES AT 10 MPH...17 KM/H
MINIMUM CENTRAL PRESSURE...961 MB...28.38 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 AM HST (1200 UTC), the center of Hurricane Walaka was located
near latitude 12.1 North, longitude 167.9 West. Walaka is moving
toward the west-northwest near 10 mph (17 km/h). This motion is
expected to continue tonight, with a turn toward the northwest on
Monday, followed by a turn toward the north with an increase in
forward speed on Tuesday and Tuesday night.
 
Maximum sustained winds are near 115 mph (185 km/h) with higher
gusts. Rapid intensification is expected tonight and Monday with
little change in intensity forecast Monday night through Tuesday
night.
 
Hurricane-force winds extend outward up to 30 miles (45 km) from
the center and tropical-storm-force winds extend outward up to 125
miles (205 km).
 
The estimated minimum central pressure is 961 mb (28.38 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
WIND: Tropical Storm force winds are expected across Johnston Island
starting late Monday night or early Tuesday, with Hurricane
conditions expected by Tuesday afternoon.
 
SURF: Large surf will affect the Johnston Atoll reefs and shorelines
starting late Monday.
 
RAINFALL: Heavy rainfall associated with Walaka may reach Johnston
Atoll late Monday or Monday night.
 
 
NEXT ADVISORY
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Next complete advisory at 500 AM HST.
 
$$
Forecaster Jelsema
 
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