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Hurricane Douglas Intermediate Advisory Number 18A
NWS Central Pacific Hurricane Center Honolulu HI   EP082020
200 PM HST Fri Jul 24 2020
 
...MAJOR HURRICANE DOUGLAS CONTINUES TO TRACK TOWARD THE HAWAIIAN
ISLANDS...
 
 
SUMMARY OF 200 PM HST...0000 UTC...INFORMATION
----------------------------------------------
LOCATION...17.4N 144.3W
ABOUT 725 MI...1165 KM ESE OF HILO HAWAII
ABOUT 930 MI...1495 KM ESE OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...115 MPH...185 KM/H
PRESENT MOVEMENT...WNW OR 295 DEGREES AT 18 MPH...29 KM/H
MINIMUM CENTRAL PRESSURE...967 MB...28.56 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY...
 
None.
 
SUMMARY OF WATCHES AND WARNING IN EFFECT...
 
A Hurricane Watch is in effect for...
* Hawaii County
* Maui County, including Maui, Lanai, Molokai and Kahoolawe
 
A Hurricane Watch means that hurricane conditions are possible
within the watch area, in this case within 36 to 48 hours.
 
Interests elsewhere in the Hawaiian Islands 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 200 PM HST (0000 UTC), the center of Hurricane Douglas was
located near latitude 17.4 North, longitude 144.3 West. Douglas is
moving toward the west-northwest near 18 mph (30 km/h). This motion
is expected to continue for the next two days, followed by a slight
decrease in forward speed and a turn toward the west. On the
forecast track, Douglas will be near the main Hawaiian Islands on
Sunday and Monday.
 
Maximum sustained winds are near 115 mph (185 km/h) with higher
gusts. Douglas is a category 3 hurricane on the Saffir-Simpson
Hurricane Wind Scale. Gradual weakening is expected to continue 
through the weekend. However, Douglas is still forecast to
be near hurricane strength when it nears the islands.
 
Hurricane-force winds extend outward up to 25 miles (35 km) from
the center and tropical-storm-force winds extend outward up to 115
miles (185 km).
 
The estimated minimum central pressure is 967 mb (28.56 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
WIND:  Hurricane conditions are possible on the Big Island late
Saturday night and Sunday, with tropical storm conditions possible
by Saturday evening. Hurricane conditions are possible over Maui
County Sunday, with tropical storm conditions possible beginning
late Saturday night.
 
SURF:  Large swells generated by Douglas are expected to begin
affecting portions of the Hawaiian Islands on Saturday. These
swells are likely to cause life-threatening surf and rip current
conditions for a couple of days.
 
RAINFALL:  Heavy rainfall associated with Douglas is expected to
affect portions of the Hawaiian Islands from late Saturday night
through Monday. Total rain accumulations of 6 to 10 inches with
isolated maximum totals of 15 inches are possible, especially
in higher terrain. This rain may result in life-threatening
flash flooding and land slides.
 
Key messages for Douglas can be found in the Tropical Cyclone
Discussion under AWIPS header HFOTCDCP2 and WMO header WTPA32 PHFO.
 
 
NEXT ADVISORY
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Next complete advisory at 500 PM HST.
 
$$
Forecaster Birchard
 
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