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BULLETIN
Hurricane Walaka Advisory Number  11
NWS Central Pacific Hurricane Center Honolulu HI   CP012018
1100 PM HST Mon Oct 01 2018
 
...WALAKA REMAINS A DANGEROUS CATEGORY 5 HURRICANE HEADING TOWARD
JOHNSTON ISLAND...
 
 
SUMMARY OF 1100 PM HST...0900 UTC...INFORMATION
-----------------------------------------------
LOCATION...13.7N 170.0W
ABOUT 210 MI...340 KM S OF JOHNSTON ISLAND
ABOUT 955 MI...1535 KM WSW OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...160 MPH...260 KM/H
PRESENT MOVEMENT...NNW OR 330 DEGREES AT 8 MPH...13 KM/H
MINIMUM CENTRAL PRESSURE...921 MB...27.20 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.
 
 
DISCUSSION AND OUTLOOK
----------------------
At 1100 PM HST (0900 UTC), the center of Hurricane Walaka was
located near latitude 13.7 North, longitude 170.0 West. Walaka is
moving toward the north-northwest near 8 mph (13 km/h). A turn
toward the north is expected later tonight with an increase in
forward speed expected Tuesday through Wednesday. 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. Little change in intensity is expected
through Tuesday, with a weakening trend expected to begin late
Tuesday night or early Wednesday. 
 
Hurricane-force winds extend outward up to 45 miles (75 km) from the
center and tropical-storm-force winds extend outward up to 185 miles
(295 km).
 
The estimated minimum central pressure is 921 mb (27.20 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
WIND: Tropical storm force winds are expected across Johnston Island
starting late tonight, with hurricane conditions expected by
Tuesday afternoon.
 
SURF: Large surf will continue to affect the Johnston Island reefs
and shorelines through Wednesday.
 
RAINFALL: Heavy rainfall associated with Walaka will continue
across Johnston Island through early Wednesday.
 
 
NEXT ADVISORY
-------------
Next intermediate advisory at 200 AM HST.
Next complete advisory at 500 AM HST.
 
$$
Forecaster Jelsema
 
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