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Hurricane Douglas Intermediate Advisory Number 26A
NWS Central Pacific Hurricane Center Honolulu HI   EP082020
200 PM HST Sun Jul 26 2020
 
...DANGEROUS HURRICANE DOUGLAS PASSING NORTH OF MAUI...
 
 
SUMMARY OF 200 PM HST...0000 UTC...INFORMATION
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LOCATION...21.6N 156.4W
ABOUT 50 MI...80 KM N OF KAHULUI HAWAII
ABOUT 100 MI...160 KM E OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...85 MPH...140 KM/H
PRESENT MOVEMENT...WNW OR 290 DEGREES AT 16 MPH...26 KM/H
MINIMUM CENTRAL PRESSURE...989 MB...29.21 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY...
 
The Tropical Storm Warning has been canceled for Hawaii County.
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT...
 
A Hurricane Warning is in effect for...
* Maui County, including the islands of Maui, Lanai, Molokai and
Kahoolawe
* Oahu
* Kauai County, including the islands of Kauai and Niihau
 
A Tropical Storm Warning is in effect for...
* Portions of the Papahanaumokuakea Marine National Monument from
Nihoa to French Frigate Shoals
 
A Tropical Storm Watch is in effect for...
* Portions of the Papahanaumokuakea Marine National Monument from
French Frigate Shoals to Maro Reef
 
A Hurricane Warning means that hurricane conditions are expected
somewhere within the warning area, in this case within the next
18 hours.
 
A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area, in this case within the 
next 36 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 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 PM HST (0000 UTC), the center of Hurricane Douglas was
located near latitude 21.6 North, longitude 156.4 West. Douglas is
moving toward the west-northwest near 16 mph (26 km/h), and this
motion is expected to continue over the next couple of days. On the
forecast track, Douglas will pass near, or over, the islands from
Maui to Kauai through tonight.
 
Maximum sustained winds are near 85 mph (140 km/h) with higher
gusts. Gradual weakening is forecast during the next 48 hours, but
Douglas is expected to remain a hurricane as it moves through the
islands.
 
Hurricane-force winds extend outward up to 35 miles (55 km) from
the center and tropical-storm-force winds extend outward up to 115
miles (185 km).
 
The estimated minimum central pressure is 989 mb (29.21 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
WIND:  Hurricane conditions are expected in portions of Maui County
today, on Oahu by late this afternoon, and on Kauai tonight. Due to 
the steep terrain of the islands, hurricane-force wind gusts are 
possible even within the tropical storm warning area.
 
SURF:  Large swells generated by Douglas will affect the Hawaiian
Islands into Monday, producing life-threatening and potentially
damaging 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 today 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 an additional 2 to 4 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
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Next complete advisory at 500 PM HST.
 
$$
Forecaster Wroe
 
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