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BULLETIN
Tropical Storm Douglas Intermediate Advisory Number 31A
NWS Central Pacific Hurricane Center Honolulu HI   EP082020
800 PM HST Mon Jul 27 2020
 
...DOUGLAS WEAKENING BUT BRINGING TROPICAL STORM CONDITIONS TO 
PORTIONS OF THE PAPAHANAUMOKUAKEA MARINE NATIONAL MONUMENT...
 
 
SUMMARY OF 800 PM HST...0600 UTC...INFORMATION
----------------------------------------------
LOCATION...23.2N 164.1W
ABOUT 145 MI...235 KM ESE OF FRENCH FRIGATE SHOALS
ABOUT 415 MI...665 KM WNW OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/H
PRESENT MOVEMENT...WNW OR 285 DEGREES AT 13 MPH...20 KM/H
MINIMUM CENTRAL PRESSURE...999 MB...29.5 INCHES

WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY...
 
None.
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT...
 
A Tropical Storm Warning is in effect for...
* Portions of the Papahanaumokuakea Marine National Monument from
Nihoa to French Frigate Shoals to Maro Reef
 
A Tropical Storm Watch is in effect for...
* Portions of the Papahanaumokuakea National Marine Monument from
Maro Reef to Lisianski
 
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 to 24 to 36 hours.

 
 
DISCUSSION AND OUTLOOK
----------------------
At 800 PM HST (0600 UTC), the center of Tropical Storm Douglas was
located near latitude 23.2 North, longitude 164.1 West. Douglas is
moving toward the west-northwest near 13 mph (20 km/h) and this 
general motion is expected to continue the next couple of days.
 
Maximum sustained winds are near 60 mph (110 km/h) with higher
gusts. Weakening is forecast over the next couple of days, with 
Douglas expected to become a remnant low in a few days. 
 
Tropical-storm-force winds extend outward up to 105 miles (165 km)
from the center.
 
The estimated minimum central pressure is 999 mb (29.5 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
WIND: The center of Douglas will pass very close to Necker Island 
and French Frigate Shoals overnight, bringing tropical storm 
conditions. Tropical storm conditions are expected from French 
Frigate Shoals to Maro Reef Tuesday and Tuesday night. 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 will impact portions of
the Papahanaumokuakea Marine National Monument over the next couple
of days.
 
 
NEXT ADVISORY
-------------
Next complete advisory at 1100 PM HST.
 
$$
Forecaster Birchard
 
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