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Hurricane DOUGLAS


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Hurricane Douglas Intermediate Advisory Number 20A
NWS Central Pacific Hurricane Center Honolulu HI   EP082020
200 AM HST Sat Jul 25 2020
 
...DOUGLAS CONTINUES WEST-NORTHWEST TOWARD HAWAII...
 
 
SUMMARY OF 200 AM HST...1200 UTC...INFORMATION
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LOCATION...18.7N 147.7W
ABOUT 485 MI...780 KM E OF HILO HAWAII
ABOUT 690 MI...1105 KM ESE OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...110 MPH...175 KM/H
PRESENT MOVEMENT...WNW OR 290 DEGREES AT 18 MPH...30 KM/H
MINIMUM CENTRAL PRESSURE...973 MB...28.73 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY...
 
None.
 
SUMMARY OF WATCHES AND WARNING IN EFFECT...
 
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
* Oahu
 
A Tropical Storm Warning means that tropical storm conditions are
expected somewhere withing the warning area within 36 hours.
 
A Hurricane Watch means that hurricane conditions are possible
within the watch area, in this case within 36 to 48 hours.
 
Interests elsewhere in the main Hawaiian Islands, and 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 near latitude 18.7 North, longitude 147.7 West. Douglas is
moving toward the west-northwest near 18 mph (30 km/h). This motion
is expected to continue through Saturday, followed by a slight
decrease in forward speed and a turn toward the west. On the
forecast track, Douglas will be near the main Hawaiian Islands
Saturday night through Sunday night.
 
Maximum sustained winds are near 110 mph (175 km/h) with higher
gusts. Douglas is a category 2 hurricane on the Saffir-Simpson
Hurricane Wind Scale. Gradual weakening is expected to continue
through the weekend. However, Douglas is still forecast to be near
hurricane strength when it nears the islands.
 
Hurricane-force winds extend outward up to 30 miles (45 km) from
the center and tropical-storm-force winds extend outward up to 115
miles (185 km).
 
The estimated minimum central pressure is 973 mb (28.73 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
WIND:  Hurricane conditions are possible across portions of the
main Hawaiian Islands late Saturday night through Monday. Tropical
Storm conditions are expected across Hawaii County and Maui County
beginning Saturday night or Sunday.
 
SURF:  Large swells generated by Douglas are expected to affect
the Hawaiian Islands this weekend. These swells are likely to cause
life-threatening surf and rip current conditions for a couple of
days.
 
RAINFALL:  Heavy rainfall associated with Douglas is expected to
affect portions of the main Hawaiian Islands from late Saturday
night through Monday. Total rain accumulations of 5 to 10 inches
with locally higher amounts will be possible on the smaller
islands, especially across elevated terrain. This rain may result
in life-threatening flash flooding and land slides, as well as
rapid water level rises on small streams. 3 to 6 inches of rainfall
are possible on the Big Island, with locally higher amounts.
 
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 AM HST.
 
$$
Forecaster Jelsema
 
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