BULLETIN
Hurricane Douglas Advisory Number 26
NWS Central Pacific Hurricane Center Honolulu HI EP082020
1100 AM HST Sun Jul 26 2020
...DANGEROUS HURRICANE DOUGLAS NEAR MAUI...
SUMMARY OF 1100 AM HST...2100 UTC...INFORMATION
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LOCATION...21.2N 155.7W
ABOUT 55 MI...90 KM ENE OF KAHULUI HAWAII
ABOUT 140 MI...230 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...987 MB...29.15 INCHES
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY...
A Tropical Storm Warning has been issued for portions of the
Papahanaumokuakea Marine National Monument from Nihoa to French
Frigate Shoals.
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...
* Hawaii County
* 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
24 hours.
A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area, in this case imminently
on Hawaii County and within the next 36 hours over portions of the
Papahanaumokuakea Marine National Monument from Nihoa to French
Frigate Shoals.
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 1100 AM HST (2100 UTC), the center of Hurricane Douglas was
located near latitude 21.2 North, longitude 155.7 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 today and 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 987 mb (29.15 inches).
HAZARDS AFFECTING LAND
----------------------
WIND: Hurricane conditions are expected in portions of Maui County
today, on Oahu by this afternoon, and on Kauai and Niihau tonight.
Tropical Storm conditions are imminent across portions of the Big
Island. 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
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 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 intermediate advisory at 200 PM HST.
Next complete advisory at 500 PM HST.
$$
Forecaster Wroe