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BULLETIN
Tropical Storm Douglas Advisory Number  33
NWS Central Pacific Hurricane Center Honolulu HI   EP082020
500 AM HST Tue Jul 28 2020
 
...DOUGLAS WEAKENING BUT BRINGING TROPICAL STORM CONDITIONS TO
PORTIONS OF THE PAPAHANAUMOKUAKEA MARINE NATIONAL MONUMENT...
 
 
SUMMARY OF 500 AM HST...1500 UTC...INFORMATION
----------------------------------------------
LOCATION...24.1N 166.6W
ABOUT 585 MI...945 KM WNW OF HONOLULU HAWAII
ABOUT 25 MI...40 KM NW OF FRENCH FRIGATE SHOALS
MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H
PRESENT MOVEMENT...WNW OR 290 DEGREES AT 21 MPH...33 KM/H
MINIMUM CENTRAL PRESSURE...1002 MB...29.59 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY...
 
The Tropical Storm Watch for portions of the Papahanaumokuakea
Marine National Monument from Maro Reef to Lisianski has been
upgraded to a Tropical Storm Warning.
 
A Tropical Storm Watch has been issued for portions of the
Papahanaumokuakea Marine National Monument from Lisianski to Pearl
and Hermes Atoll.
 
The Tropical Storm Warning for portions of the Papahanaumokuakea
Marine National Monument from Nihoa to French Frigate Shoals has
been discontinued.
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT...
 
A Tropical Storm Warning is in effect for...
* Portions of the Papahanaumokuakea Marine National Monument from
French Frigate Shoals to Maro Reef to Lisianski
 
A Tropical Storm Watch is in effect for...
* Portions of the Papahanaumokuakea Marine National Monument from
Lisianski to Pearl and Hermes Atoll
 
A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area, in this case within
the next 24 hours.
 
A Tropical Storm Watch means that tropical storm conditions are
possible somewhere within the watch area, in this case within the
next 24 to 36 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 Tropical Storm Douglas was
located near latitude 24.1 North, longitude 166.6 West. Douglas is
moving toward the west-northwest near 21 mph (33 km/h), and this 
general motion is expected to continue for the next couple of days.
 
Maximum sustained winds are near 50 mph (85 km/h) with higher gusts.
Weakening is forecast over the next couple of days, and Douglas is 
expected to dissipate by Thursday.
 
Tropical-storm-force winds extend outward up to 140 miles (220 km)
from the center.
 
The estimated minimum central pressure is 1002 mb (29.59 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
WIND: Tropical storm conditions are expected to spread from French
Frigate Shoals to Maro Reef, including Gardner Pinnacles, today and
tonight. Tropical storm conditions are then expected over the area
from Maro Reef to Lisianski, including Laysan, later tonight into
Wednesday. Tropical storm conditions are possible over the area
from Lisianski to Pearl and Hermes Atoll on Wednesday.
 
SURF: Large seas and swells generated by Douglas will impact a
large swath of the Papahanaumokuakea Marine National Monument the
next day or two. These swells will produce large breaking waves
that could inundate some of the lower-lying atolls.
 
RAINFALL: Rainfall associated with Douglas will impact portions of
the Papahanaumokuakea Marine National Monument through Wednesday.
 
 
NEXT ADVISORY
-------------
Next intermediate advisory at 800 AM HST.
Next complete advisory at 1100 AM HST.
 
$$
Forecaster Birchard
 
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