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BULLETIN
Tropical Storm Walaka Advisory Number   5
NWS Central Pacific Hurricane Center Honolulu HI   CP012018
1100 AM HST Sun Sep 30 2018
 
...WALAKA CONTINUES TO INTENSIFY FAR SOUTHWEST OF HAWAII...
 
 
SUMMARY OF 1100 AM HST...2100 UTC...INFORMATION
-----------------------------------------------
LOCATION...11.9N 165.2W
ABOUT 440 MI...705 KM SE OF JOHNSTON ISLAND
ABOUT 810 MI...1300 KM SW OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...65 MPH...100 KM/H
PRESENT MOVEMENT...W OR 280 DEGREES AT 18 MPH...30 KM/H
MINIMUM CENTRAL PRESSURE...995 MB...29.39 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:
 
None.
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
 
A Hurricane Watch is in effect for...
* Johnston Atoll
 
A Hurricane Watch means that hurricane conditions are possible in
the watch area. A watch is typically issued 48 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 center of Tropical Storm Walaka was
located near latitude 11.9 North, longitude 165.2 West. Walaka is
moving toward the west near 18 mph (30 km/h) and this motion is
expected to slow and become northwest on Monday, then north on
Tuesday.
 
Maximum sustained winds are near 65 mph (100 km/h) with higher
gusts. Rapid intensification is forecast through Tuesday, with
Walaka expected to become a hurricane later today.
 
Tropical-storm-force winds extend outward up to 70 miles (110 km)
from the center.
 
The estimated minimum central pressure is 995 mb (29.39 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
WIND: Tropical Storm force winds are possible across Johnston
Island starting early Tuesday, with Hurricane conditions possible
starting late Tuesday or Tuesday night.
 
SURF: Large surf will affect the Johnston Atoll reefs and shorelines
starting late Tuesday.
 
RAINFALL: Heavy rainfall associated with Walaka may reach Johnston
Atoll by Monday or Monday night.
 
 
NEXT ADVISORY
-------------
Next intermediate advisory at 200 PM HST.
Next complete advisory at 500 PM HST.
 
$$
Forecaster Powell
 
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