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BULLETIN
Hurricane Walaka Advisory Number   7
NWS Central Pacific Hurricane Center Honolulu HI   CP012018
1100 PM HST Sun Sep 30 2018
 
...WALAKA RAPIDLY INTENSIFYING FAR SOUTHWEST OF HAWAII...
 
 
SUMMARY OF 1100 PM HST...0900 UTC...INFORMATION
-----------------------------------------------
LOCATION...11.9N 167.5W
ABOUT 355 MI...575 KM SSE OF JOHNSTON ISLAND
ABOUT 905 MI...1460 KM SW OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...105 MPH...165 KM/H
PRESENT MOVEMENT...W OR 280 DEGREES AT 12 MPH...19 KM/H
MINIMUM CENTRAL PRESSURE...970 MB...28.65 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 PM HST (0900 UTC), the center of Hurricane Walaka was
located near latitude 11.9 North, longitude 167.5 West. Walaka is
moving toward the west near 12 mph (19 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 105 mph (165 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 970 mb (28.65 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
-------------
Next intermediate advisory at 200 AM HST.
Next complete advisory at 500 AM HST.
 
$$
Forecaster Jelsema
 
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