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BULLETIN
Hurricane Walaka Advisory Number  15
NWS Central Pacific Hurricane Center Honolulu HI   CP012018
1100 PM HST Tue Oct 02 2018
 
...DANGEROUS WALAKA MOVING RAPIDLY NORTH TOWARD THE
PAPAHANAUMOKUAKEA MARINE NATIONAL MONUMENT...
...HURRICANE CONDITIONS PERSIST NEAR JOHNSTON ATOLL...
 
 
SUMMARY OF 1100 PM HST...0900 UTC...INFORMATION
-----------------------------------------------
LOCATION...18.1N 170.0W
ABOUT 100 MI...165 KM NNW OF JOHNSTON ISLAND
ABOUT 465 MI...750 KM SSW OF FRENCH FRIGATE SHOALS
MAXIMUM SUSTAINED WINDS...130 MPH...215 KM/H
PRESENT MOVEMENT...N OR 5 DEGREES AT 13 MPH...20 KM/H
MINIMUM CENTRAL PRESSURE...946 MB...27.94 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
* Papahanaumokuakea Marine National Monument from French Frigate
Shoals to Maro Reef
 
A Tropical Storm Warning is in effect for...
* Papahanaumokuakea Marine National Monument from Nihoa to French
Frigate Shoals
 
A Hurricane Warning means that hurricane conditions are expected in
the warning area within 36 hours.
 
A Tropical Storm Warning means that tropical storm conditions are
expected within the warning area within 36 hours.
 
 
DISCUSSION AND OUTLOOK
----------------------
At 1100 PM HST (0900 UTC), the center of Hurricane Walaka was
located near latitude 18.1 North, longitude 170.0 West. Walaka is
moving toward the north near 13 mph (20 km/h). The hurricane is
expected to turn toward the north-northeast with a faster forward
motion Wednesday and Wednesday night. Walaka is forecast to turn
toward the north with a slower forward speed starting Thursday. On
this track, the center of Walaka will likely reach the
Papahanaumokuakea Marine National Monument Wednesday night.
 
Maximum sustained winds are near 130 mph (215 km/h) with higher
gusts. Walaka remains a dangerous category 4 hurricane on the
Saffir-Simpson Hurricane Wind Scale. Some gradual weakening is
expected through Thursday, but Walaka is forecast to remain a
hurricane as it passes across the Papahanaumokuakea Marine National
Monument late Wednesday.
 
Hurricane-force winds extend outward up to 40 miles (65 km) from the
center and tropical-storm-force winds extend outward up to 185 miles
(295 km).
 
The estimated minimum central pressure is 946 mb (27.94 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
WIND: Hurricane conditions will persist on Johnston Atoll through
early Wednesday morning, with conditions gradually improving during
the day on Wednesday. Tropical storm force winds are expected
across the Papahanaumokuakea Marine National Monument from Nihoa to
French Frigate Shoals to Maro Reef beginning Wednesday afternoon,
with hurricane conditions expected over portions of the area
between French Frigate Shoals and Maro Reef Wednesday night.
 
SURF: Large surf associated with Walaka will continue to affect
Johnston Atoll through Wednesday. Large surf will affect the
Papahanaumokuakea Marine National Monument beginning early
Wednesday. These large waves will likely inundate some of the
low-lying atolls, especially from French Frigate Shoals to Maro
Reef.
 
RAINFALL: Torrential rainfall associated with Walaka will continue
across Johnston Atoll through early Wednesday, and will reach the
Papahanaumokuakea Marine National Monument from Nihoa to French
Frigate Shoals to Maro Reef starting Wednesday.
 
 
NEXT ADVISORY
-------------
Next intermediate advisory at 200 AM HST.
Next complete advisory at 500 AM HST.
 
$$
Forecaster Houston
 
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