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BULLETIN
Hurricane Douglas Intermediate Advisory Number 27A
NWS Central Pacific Hurricane Center Honolulu HI   EP082020
800 PM HST Sun Jul 26 2020
 
...DANGEROUS HURRICANE DOUGLAS PASSING JUST NORTH OF OAHU AND 
APPROACHING KAUAI...

SUMMARY OF 800 PM HST...0600 UTC...INFORMATION
----------------------------------------------
LOCATION...22.2N 158.0W
ABOUT 60 MI...95 KM N OF HONOLULU HAWAII
ABOUT 85 MI...140 KM E OF LIHUE HAWAII
MAXIMUM SUSTAINED WINDS...85 MPH...140 KM/H
PRESENT MOVEMENT...WNW OR 285 DEGREES AT 16 MPH...26 KM/H
MINIMUM CENTRAL PRESSURE...988 MB...29.18 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY...
 
None.
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT...
 
A Hurricane Warning is in effect for...
* Oahu
* Kauai County, including the islands of Kauai and Niihau
 
A Tropical Storm Warning is in effect for...
* Portions of the Papahanaumokuakea Marine National Monument from
Nihoa to French Frigate Shoals
 
A Tropical Storm Watch is in effect for...
* Portions of the Papahanaumokuakea Marine National Monument from
French Frigate Shoals to Maro Reef
 
A Hurricane Warning means that hurricane conditions are expected
somewhere within the warning area, in this case within the next
18 hours.
 
A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area, in this case within the
next 36 hours.
 
A Tropical Storm Watch means that tropical storm conditions are
possible within the watch area, in this case within the next 36 to
48 hours.
 
Interests elsewhere in the Papahanaumokuakea Marine National
Monument should monitor the progress of this system.
 
For storm information specific to your area, please monitor
products issued by the National Weather Service office in
Honolulu Hawaii.
 
 
DISCUSSION AND OUTLOOK
----------------------
At 800 PM HST (0600 UTC), the center of Hurricane Douglas was
located by Hurricane Hunter aircraft near latitude 22.2 North, 
longitude 158.0 West. Douglas is moving toward the west-northwest 
near 16 mph (26 km/h), and this motion is expected to continue over 
the next couple of days. On the forecast track, Douglas will pass 
near Oahu and Kauai tonight.
 
Maximum sustained winds are near 85 mph (140 km/h) with higher
gusts.  Gradual weakening is forecast during the next 48 hours, but
Douglas is expected to remain a hurricane as it moves near Kauai
later tonight.
 
Hurricane-force winds extend outward up to 40 miles (65 km) from
the center and tropical-storm-force winds extend outward up to 115
miles (185 km).
 
The estimated minimum central pressure is 988 mb (29.18 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
WIND:  Hurricane conditions are expected across portions of Oahu
this evening, and on Kauai later tonight. Due to the steep terrain 
of the islands, localized strong wind gusts are expected.
 
SURF:  Large swells generated by Douglas will affect the Hawaiian
Islands tonight, producing life-threatening and potentially
damaging surf along exposed shores. Storm surge of up to 2 feet is
possible. Surf will decline on Monday.
 
RAINFALL:  Heavy rainfall associated with Douglas is expected to
affect portions of the main Hawaiian Islands tonight into Monday.
Total rain accumulations of 3 to 6 inches with locally higher
amounts are possible, with the greatest rainfall in elevated
terrain. This rain may result in flash flooding and land slides, as
well as rapid water level rises on small streams.
 
Key messages for Douglas can be found in the Tropical Cyclone
Discussion under AWIPS header HFOTCDCP2 and WMO header WTPA32 PHFO.
 
 
NEXT ADVISORY
-------------
Next complete advisory at 1100 PM HST.
 
$$
Forecaster Houston/Birchard
 
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