HURRICANE DOUGLAS maintaining its CATEGORY ONE status with maximum sustained winds of 90 miles per hour.
HURRICANE WARNING CONTINUES FOR OAHU...KAUAI...NI'IHAU...MAUI...MOLOKAI...LANAI...KAHOOLAWE
TROPICAL STORM WARNING CONTINUES FOR HAWAII ISLAND
For details on OAHU POSSIBLE STORM SURGE MAPPING: HERE
The forecast includes:
Douglas will pass NEAR, OR OVER, THE ISLANDS FROM MAUI TO KAUAI TODAY (Sunday, July 26) and TONIGHT...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 30 MILES FROM THE CENTER AND TROPICAL-STORM-FORCE WINDS EXTEND OUTWARD UP TO 105 MILES.
Hurricane Douglas Intermediate Advisory Number 25A
NWS Central Pacific Hurricane Center Honolulu HI EP082020
800 AM HST Sun Jul 26 2020
...DANGEROUS HURRICANE DOUGLAS CLOSING IN ON THE HAWAIIAN ISLANDS...
SUMMARY OF 800 AM HST...1800 UTC...INFORMATION
ABOUT 90 MI...145 KM E OF KAHULUI HAWAII
ABOUT 185 MI...300 KM E OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...90 MPH...150 KM/H
PRESENT MOVEMENT...WNW OR 285 DEGREES AT 16 MPH...26 KM/H
MINIMUM CENTRAL PRESSURE...987 MB...29.15 INCHES
WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY...
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
* Kauai County, including the islands of Kauai and Niihau
A Tropical Storm Warning is in effect for...
* Hawaii County
A Tropical Storm Watch is in effect for...
* Portions of the Papahanaumokuakea Marine National Monument from Nihoa to 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 within the next 12 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 800 AM HST (1800 UTC), the center of Hurricane Douglas was located near latitude 20.9 North, longitude 155.0 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 90 mph (150 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
Hurricane-force winds extend outward up to 30 miles (45 km) from the center and tropical-storm-force winds extend outward up to 105 miles (165 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 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
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 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 complete advisory at 1100 AM HST.