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BULLETIN
Hurricane Douglas Intermediate Advisory Number 24A
NWS Central Pacific Hurricane Center Honolulu HI   EP082020
200 AM HST Sun Jul 26 2020
 
...DANGEROUS HURRICANE DOUGLAS CLOSING IN ON THE HAWAIIAN ISLANDS...
 
 
SUMMARY OF 200 AM HST...1200 UTC...INFORMATION
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LOCATION...20.5N 153.6W
ABOUT 190 MI...300 KM E OF KAHULUI HAWAII
ABOUT 285 MI...460 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...
 
None.
 
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 12
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 12 to 24 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 200 AM HST (1200 UTC), the center of Hurricane Douglas was
located by Hurricane Hunter aircraft near latitude 20.5 North,
longitude 153.6 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 later 
today.
 
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 expected to remain near hurricane intensity as it passes
near, or over, 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 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 later today 
and on Kauai and Niihau tonight, and remain possible across 
Maui County and the Big Island today. Tropical Storm conditions
are imminent across the Big Island and Maui County.
 
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 this 
morning into Monday. Total rain accumulations of 5 to 10 inches are
possible from Maui County westward to Kauai County, with the
greatest amounts up to 15 inches 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 complete advisory at 500 AM HST.
 
$$
Forecaster Birchard
 
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