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BULLETIN
Hurricane Douglas Advisory Number  17
NWS Central Pacific Hurricane Center Honolulu HI   EP082020
500 AM HST Fri Jul 24 2020
 
...MAJOR HURRICANE DOUGLAS CONTINUES TO TRACK TOWARD THE HAWAIIAN
ISLANDS...
 
 
SUMMARY OF 500 AM HST...1500 UTC...INFORMATION
----------------------------------------------
LOCATION...16.4N 141.9W
ABOUT 895 MI...1440 KM ESE OF HILO HAWAII
ABOUT 1100 MI...1765 KM ESE OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...120 MPH...195 KM/H
PRESENT MOVEMENT...WNW OR 295 DEGREES AT 18 MPH...30 KM/H
MINIMUM CENTRAL PRESSURE...962 MB...28.41 INCHES
 
 
WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.
 
Interests in the Hawaiian Islands should monitor the progress of
Douglas. Watches will likely be required later today for portions of
the island chain.
 
 
DISCUSSION AND OUTLOOK
----------------------
At 500 AM HST (1500 UTC), the center of Hurricane Douglas was
located near latitude 16.4 North, longitude 141.9 West. Douglas is
moving toward the west-northwest near 18 mph (30 km/h). This
motion is expected to continue for the next few days with a gradual
decrease in forward speed and a slight turn toward the west. 
On the forecast track, Douglas will approach the eastern Hawaiian 
Islands late Saturday night or Sunday.

Maximum sustained winds are near 120 mph (195 km/h) with higher
gusts.  Douglas is a category 3 hurricane on the Saffir-Simpson
Hurricane Wind Scale.  Gradual weakening is expected to continue 
today through the weekend.  However, Douglas is still forecast to be 
near hurricane strength as it approaches the eastern end of 
the Hawaiian Island chain late Saturday night or Sunday.
 
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 962 mb (28.41 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
WIND:  Strong winds associated with Douglas are expected to
affect portions of the Hawaiian Islands as early as late Saturday
night or Sunday, through the day Monday. Tropical Storm or
Hurricane Watches will likely be required for portions of the state
later today.
 
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. Please consult products from your local weather office.
 
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 will be possible, especially
across elevated terrain. This rain may result in life-threatening
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 AM HST.
 
$$
Forecaster Jelsema
 
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