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BULLETIN
Hurricane Douglas Advisory Number  29
NWS Central Pacific Hurricane Center Honolulu HI   EP082020
500 AM HST Mon Jul 27 2020
 
...HURRICANE DOUGLAS MOVING AWAY FROM THE MAIN HAWAIIAN ISLANDS...
...HURRICANE WARNING ISSUED FOR PORTIONS OF THE PAPAHANAUMOKUAKEA 
MARINE NATIONAL MONUMENT... 
 
SUMMARY OF 500 AM HST...1500 UTC...INFORMATION
----------------------------------------------
LOCATION...22.9N 160.4W
ABOUT 90 MI...145 KM NW OF LIHUE HAWAII
ABOUT 380 MI...610 KM ESE OF FRENCH FRIGATE SHOALS
MAXIMUM SUSTAINED WINDS...90 MPH...150 KM/H
PRESENT MOVEMENT...WNW OR 290 DEGREES AT 17 MPH...28 KM/H
MINIMUM CENTRAL PRESSURE...987 MB...29.15 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY...
 
The Tropical Storm Warning for portions of the Papahanaumokuakea
Marine National Monument from Nihoa to French Frigate Shoals has
been upgraded to a Hurricane Warning.
 
A Hurricane Watch has been issued for portions of the
Papahanaumokuakea Marine National Monument from French Frigate
Shoals to Maro Reef.
 
A Tropical Storm Watch has been issued for portions of the
Papahanaumokuakea Marine National Monument from Maro Reef to
Lisianski.
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT...
 
A Hurricane Warning is in effect for...
* Portions of the Papahanaumokuakea Marine National Monument from
Nihoa to French Frigate Shoals
 
A Tropical Storm Warning is in effect for...
* Portions of the Papahanaumokuakea Marine National Monument from
French Frigate Shoals to Maro Reef
 
A Hurricane Watch is in effect for...
* Portions of the Papahanaumokuakea Marine National Monument from
French Frigate Shoals to Maro Reef
 
A Tropical Storm Watch is in effect for...
* Portions of the Papahanaumokuakea Marine National Monument from
Maro Reef to Lisianski
 
A Hurricane Warning means that hurricane conditions are expected
somewhere within the warning area, in this case within the next 36
hours.
 
A Hurricane Watch means that hurricane conditions are possible
somewhere within the warning area, in this case within the next 24
to 36 hours.
 
A Tropical Storm Warning means that tropical storm conditions
are expected somewhere within the warning area, in this case within
the next 12 to 24 hours.
 
A Tropical Storm Watch means that tropical storm conditions are
possible somewhere within the watch area, in this case within the
next to 36 to 48 hours.
 
Interests elsewhere in the Papahanaumokuakea Marine National
Monument should monitor the progress of this system.

 
DISCUSSION AND OUTLOOK
----------------------
At 500 AM HST (1500 UTC), the center of Hurricane Douglas was
located near latitude 22.9 North, longitude 160.4 West. Douglas is
moving toward the west-northwest near 17 mph (28 km/h), and this
general motion will continue the next couple of days, with a slight
turn toward the west.
 
Maximum sustained winds are near 90 mph (150 km/h) with higher
gusts. Weakening is forecast during the next couple of days.
 
Hurricane-force winds extend outward up to 25 miles (35 km) from the
center and tropical-storm-force winds extend outward up to 105 miles
(165 km).
 
The estimated minimum central pressure is 987 mb (29.15 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
WIND: Hurricane force winds are expected over portions of the
Papahanaumokuakea Marine National Monument from Nihoa to French
Frigate Shoals later today and tonight. Tropical storm
conditions are expected from French Frigate Shoals to Maro Reef
Tuesday and Tuesday night, with hurricane conditions possible.
Tropical storm conditions are possible from Maro Reef to Lisianski
Tuesday night and Wednesday.
 
SURF: Large swells generated by Douglas will impact a large swath of
the Papahanaumokuakea Marine National Monument the next couple of
days. These swells will produce large breaking waves that could
inundate some of the lower-lying atolls.
 
RAINFALL:  Rainfall associated with Douglas is expected to
affect portions of the main Hawaiian Islands today. Total rain
accumulations of 3 to 6 inches with locally higher amounts are
possible, with the greatest rainfall in elevated terrain on Kauai.
This rain may result in flash flooding and land slides, as well as
rapid water level rises on small streams. Heavy rainfall will also
impact portions of the Papahanaumokuakea Marine National Monument
the next couple of days.
 
 
NEXT ADVISORY
-------------
Next intermediate advisory at 800 AM HST.
Next complete advisory at 1100 AM HST.
 
$$
Forecaster Birchard

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