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BULLETIN
Hurricane Douglas Advisory Number  22
NWS Central Pacific Hurricane Center Honolulu HI   EP082020
1100 AM HST Sat Jul 25 2020
 
...HURRICANE DOUGLAS CONTINUES TO MOVE WEST-NORTHWEST TOWARD
HAWAII...
...HURRICANE WARNING ISSUED FOR OAHU...
 
 
SUMMARY OF 1100 AM HST...2100 UTC...INFORMATION
-----------------------------------------------
LOCATION...19.5N 150.1W
ABOUT 325 MI...525 KM E OF HILO HAWAII
ABOUT 520 MI...835 KM ESE OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...90 MPH...150 KM/H
PRESENT MOVEMENT...WNW OR 290 DEGREES AT 18 MPH...30 KM/H
MINIMUM CENTRAL PRESSURE...984 MB...29.06 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY...
 
A Hurricane Warning has been issued for Oahu.
 
SUMMARY OF WATCHES AND WARNING IN EFFECT...
 
A Hurricane Warning is in effect for...
* Oahu
 
A Tropical Storm Warning is in effect for...
* Hawaii County
* Maui County, including the islands of Maui, Lanai, Molokai and
Kahoolawe
 
A Hurricane Watch is in effect for...
* Hawaii County
* Maui County, including the islands of Maui, Lanai, Molokai and
Kahoolawe
 
A Tropical Storm Watch is in effect for...
* Kauai County, including the islands of Kauai and Niihau.

A Hurricane Warning means that hurricane conditions are
expected somewhere within the warning area within 36 hours.

A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area within 36 hours.
 
A Hurricane Watch means that hurricane conditions are possible
within the watch area, in this case within the next 36 to 48 hours.
 
A Tropical Storm Watch means that tropical storm conditions are
possible within the watch area, in this case within the next 36 to
48 hours.
 
Interests elsewhere in the main Hawaiian Islands, and in the
Papahanaumokuakea Marine National Monument, 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 1100 AM HST (2100 UTC), the eye of Hurricane Douglas was
located near latitude 19.5 North, longitude 150.1 West. Douglas is
moving toward the west-northwest near 18 mph (30 km/h). This motion
is expected to continue through the next couple of days, with a 
slight decrease in forward speed today. On the forecast track, 
Douglas will be near the main Hawaiian Islands late tonight 
and will move over parts of the state Sunday and Monday.
 
Maximum sustained winds are near 90 mph (150 km/h) with higher
gusts. Gradual weakening is expected 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 30 miles (45 km) from the
center and tropical-storm-force winds extend outward up to 110 miles
(175 km).
 
The estimated minimum central pressure is 984 mb (29.06 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
WIND:  Hurricane conditions are expected on Oahu on Sunday and 
Sunday night and are possible across Maui County and the Big Island
late tonight and Sunday. Tropical Storm conditions are expected
across Hawaii County and Maui County beginning late tonight or
Sunday. Tropical Storm conditions are possible across Kauai County
late Sunday.
 
SURF:  Large swells generated by Douglas are expected to affect
the Hawaiian Islands during the next couple of days, and storm
surge of 2 to 4 feet above normal tides is expected near the
center of Douglas. The large swells and surge will produce life
threatening and potentially destructive surf along exposed shores.
 
RAINFALL:  Heavy rainfall associated with Douglas is expected to
affect portions of the main Hawaiian Islands from late tonight
through Monday. Total rain accumulations of 5 to 10 inches are
possible from Maui County westward to Kauai County, with the
greatest amounts in elevated terrain. This rain may result in
life-threatening flash flooding and land slides, as well as rapid
water level rises on small streams. Douglas is expected to
produce 2 to 5 inches of rainfall over the northern half of the
Big Island.
 
Key messages for Douglas can be found in the Tropical Cyclone
Discussion under AWIPS header HFOTCDCP2 and WMO header WTPA32 PHFO.
 
 
NEXT ADVISORY
-------------
Next intermediate advisory at 200 PM HST.
Next complete advisory at 500 PM HST.
 
$$
Forecaster Wroe
 
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