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BULLETIN
TROPICAL STORM DARBY ADVISORY NUMBER  42
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI   EP052016
500 PM HST THU JUL 21 2016
 
...DARBY STILL MOVING TOWARD HAWAII...
 
 
SUMMARY OF 500 PM HST...0300 UTC...INFORMATION
----------------------------------------------
LOCATION...18.9N 147.5W
ABOUT 500 MI...800 KM E OF HILO HAWAII
ABOUT 695 MI...1115 KM ESE OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...65 MPH...100 KM/H
PRESENT MOVEMENT...W OR 270 DEGREES AT 13 MPH...20 KM/H
MINIMUM CENTRAL PRESSURE...997 MB...29.44 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:
 
None.
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
 
A Tropical Storm watch is in effect for...
* Hawaii County
* Maui County, including the islands of Maui, Molokai, Lanai and
Kahoolawe
 
A Tropical Storm watch means that tropical storm conditions are
possible within the watch area within 48 hours.
 
Interests elsewhere in the Hawaiian Islands should monitor the
progress of Darby. Watches may be required for additional islands
later tonight or Friday.
 
For storm information specific to your area, please monitor
products issued by the National Weather Service in Honolulu.
 
DISCUSSION AND 48-HOUR OUTLOOK
------------------------------
At 500 PM HST (0300 UTC), the center of Tropical Storm Darby was
located near latitude 18.9 North, longitude 147.5 West. Darby is
moving toward the west near 13 mph (20 km/h).  This general motion
is expected to continue over the next 48 hours, with a slight
decrease in forward speed expected late Friday into Saturday. 
On the forecast track, the center of Darby will pass very close to,
or over, the Big Island on Saturday. 
 
Maximum sustained winds are near 65 mph (100 km/h) with higher
gusts.  Little change in strength is forecast during the next 48
hours. 
 
Tropical-storm-force winds extend outward up to 105 miles (165 km)
from the center.
 
The estimated minimum central pressure is 997 mb (29.44 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
WIND:  Tropical-storm-force winds are possible over the Big Island
and portions of Maui county on Saturday.
 
SURF:  Swells generated by Darby are expected to impact the
Hawaiian Islands over the next couple of days, possibly becoming
damaging along some coastlines Friday and Saturday.
 
RAINFALL:  Heavy rains associated with Darby are expected to reach
the Big Island and portions of Maui county late Friday, potentially
impacting the remainder of the state Saturday.  These rains could
cause life-threatening flash floods as well as rock and mud slides.
 
 
NEXT ADVISORY
-------------
Next intermediate advisory at 800 PM HST.
Next complete advisory at 1100 PM HST.
 
$$
Forecaster Birchard
 
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