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Hurricane WALAKA (Text)


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BULLETIN
Hurricane Walaka Advisory Number  13
NWS Central Pacific Hurricane Center Honolulu HI   CP012018
1100 AM HST Tue Oct 02 2018
 
...CATEGORY 4 HURRICANE WALAKA HEADING NORTHWARD TOWARD JOHNSTON
ATOLL...
 
 
SUMMARY OF 1100 AM HST...2100 UTC...INFORMATION
-----------------------------------------------
LOCATION...15.6N 170.1W
ABOUT 85 MI...140 KM SSW OF JOHNSTON ISLAND
ABOUT 625 MI...1005 KM SSW OF FRENCH FRIGATE SHOALS
MAXIMUM SUSTAINED WINDS...150 MPH...240 KM/H
PRESENT MOVEMENT...N OR 355 DEGREES AT 10 MPH...17 KM/H
MINIMUM CENTRAL PRESSURE...932 MB...27.53 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:
 
A Hurricane Warning has been issued for Papahanaumokuakea Marine
National Monument from French Frigate Shoals to Maro Reef.
 
A Tropical Storm Warning has been issued for Papahanaumokuakea
Marine National Monument from Nihoa to French Frigate Shoals.
 
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.
 
For storm information specific to your area, please monitor
products issued by the National Weather Service office in
Honolulu Hawaii.
 
 
DISCUSSION AND OUTLOOK
----------------------
At 1100 AM HST (2100 UTC), the center of Hurricane Walaka was
located near latitude 15.6 North, longitude 170.1 West. Walaka is
moving toward the north near 10 mph (17 km/h). This general motion
is expected to continue through Wednesday night with a steady
increase in forward speed. On the forecast track, the center of
Walaka is expected to pass just to the west of Johnston later
today, then across portions of the Papahanaumokuakea Marine National
Monument on Wednesday night.
 
Maximum sustained winds are near 150 mph (240 km/h) with higher
gusts.  Walaka is a category 4 hurricane on the Saffir-Simpson
Hurricane Wind Scale.  Slight weakening is expected through tonight,
with rapid weakening forecast Wednesday and Thursday.
 
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 932 mb (27.53 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
WIND: Tropical storm force winds are already occurring across
Johnston Atoll, with hurricane conditions expected to begin this
afternoon and last through this evening. Tropical storm force winds
are expected across the Papahanaumokuakea Marine National Monument
from Nihoa to French Frigate Shoals to Maro Reef beginning late
Wednesday, with hurricane conditions expected over portions of the
area Wednesday night.
 
SURF: Large surf associated with Walaka will continue to affect the
Johnston Atoll through Wednesday. Large surf will affect the
Papahanaumokuakea Marine National Monument from Nihoa to French
Frigate Shoals to Maro Reef beginning early Wednesday.
 
RAINFALL: Heavy 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 on Wednesday.
 
 
NEXT ADVISORY
-------------
Next intermediate advisory at 200 PM HST.
Next complete advisory at 500 PM HST.
 
$$
Forecaster Brenchley
 
NNNN

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Page last modified: Monday, 13-May-2019 15:53:17 UTC