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BULLETIN
Hurricane Douglas Advisory Number  24
NWS Central Pacific Hurricane Center Honolulu HI   EP082020
1100 PM HST Sat Jul 25 2020
 
...DANGEROUS HURRICANE DOUGLAS DRAWING CLOSER TO HAWAII...
...HURRICANE WARNING ISSUED FOR KAUAI COUNTY...
 
 
SUMMARY OF 1100 PM HST...0900 UTC...INFORMATION
-----------------------------------------------
LOCATION...20.4N 152.8W
ABOUT 240 MI...390 KM E OF KAHULUI HAWAII
ABOUT 335 MI...540 KM E OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...90 MPH...150 KM/H
PRESENT MOVEMENT...WNW OR 290 DEGREES AT 16 MPH...26 KM/H
MINIMUM CENTRAL PRESSURE...983 MB...29.03 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY...
 
The Tropical Storm Warning for Kauai County has been upgraded to a
Hurricane Warning.
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT...
 
A Hurricane Warning is in effect for...
* Oahu
* Kauai County, including the islands of Kauai and Niihau
 
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...
* Portions of the Papahanaumokuakea Marine National Monument from
Nihoa to French Frigate Shoals.
 
A Hurricane Warning means that hurricane conditions are expected
somewhere within the warning area, in this case within the next 24
to 36 hours.
 
A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area, in this case within the
next 24 to 36 hours.
 
A Hurricane Watch means that hurricane conditions are possible
within the watch area, in this case within the next 12 to 24 hours.
 
A Tropical Storm Watch means that tropical storm conditions are
possible within the watch area within the next 48 hours.
 
Interests elsewhere 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 PM HST (0900 UTC), the center of Hurricane Douglas was
located by reconnaissance aircraft near latitude 20.4 North, 
longitude 152.8 West. Douglas is moving toward the west-northwest 
near 16 mph (26 km/h), and this general motion is expected to 
continue for the next couple of days. On the forecast track, Douglas 
will pass dangerously close to the main Hawaiian Islands on Sunday.
 
Maximum sustained winds are near 90 mph (150 km/h) with higher
gusts. Some slow  weakening is forecast during the next 48 hours, 
but Douglas is forecast to remain near hurricane intensity as it 
passes the islands, necessitating a Hurricane Warning for Kauai 
County. 

Hurricane-force winds extend outward up to 25 miles (35 km) from the
center and tropical-storm-force winds extend outward up to 105 miles
(165 km).
 
The estimated minimum central pressure is 983 mb (29.03 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
WIND:  Hurricane conditions are expected on Oahu on Sunday and on
Kauai and Niihau Sunday night, and remain possible across Maui 
County and the Big Island on Sunday. Tropical Storm conditions
are expected across the Big Island and Maui County beginning early
Sunday.
 
SURF:  Large swells generated by Douglas will affect the Hawaiian
Islands into Monday, producing life-threatening and potentially
destructive surf along exposed shores.
 
STORM SURGE: The combination of higher than predicted water
levels, dangerous storm surge, and large breaking waves will raise
water levels by as much as 3 feet above normal tides near the center
of Douglas.
 
RAINFALL:  Heavy rainfall associated with Douglas is expected to
affect portions of the main Hawaiian Islands from early Sunday
into 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 could 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 AM HST.
Next complete advisory at 500 AM HST.
 
$$
Forecaster Birchard
 
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