Advisories

000
WTPA32 PHFO 161454
TCPCP2
 
BULLETIN
Tropical Storm Lala Advisory Number  17
NWS Central Pacific Hurricane Center Honolulu HI   CP012026
Issued by NWS National Hurricane Center Miami FL
500 AM HST Sun Aug 16 2026
 
...LIFE-THREATENING FLOODING CONTINUES ACROSS PORTIONS OF THE BIG 
ISLAND OF HAWAII AND MAUI COUNTY...
...HEAVY RAINFALL AND GUSTY WINDS SPREADING OVER OAHU...
 
 
SUMMARY OF 500 AM HST...1500 UTC...INFORMATION
----------------------------------------------
LOCATION...20.2N 158.1W
ABOUT 140 MI...230 KM WNW OF KAILUA-KONA HAWAII
ABOUT 75 MI...125 KM S OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...70 MPH...110 KM/H
PRESENT MOVEMENT...NW OR 305 DEGREES AT 14 MPH...22 KM/H
MINIMUM CENTRAL PRESSURE...991 MB...29.27 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:
 
None.
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
 
A Tropical Storm Warning is in effect for...
* Hawaii County
* 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 means that tropical storm conditions are
expected somewhere within the warning area, in this case within 12
to 24 hours.
 
Interests in the Papahanaumokuakea Marine National Monument should
monitor the progress of Lala.
 
For storm information specific to your area, including possible
inland watches and warnings, please monitor products issued by your
local National Weather Service forecast office.
 
 
DISCUSSION AND OUTLOOK
----------------------
At 500 AM HST (1500 UTC), the center of Tropical Storm Lala was 
located near latitude 20.2 North, longitude 158.1 West. Lala is 
moving toward the northwest near 14 mph (22 km/h) but is expected to 
turn westward later today. A continued westward motion is forecast 
through Tuesday night. The core of the storm is forecast to remain 
south of the smaller main Hawaiian Islands and the easternmost 
Northwestern Hawaiian Islands during the next couple of days.
 
Maximum sustained winds are near 70 mph (110 km/h) with higher 
gusts. Slight additional weakening is expected during the next day 
or so. Some restrengthening is forecast by midweek.
 
Tropical-storm-force winds extend outward up to 140 miles (220 km)
from the center. A weather station (Ilio 1) on the northwestern 
portion of Molokai at an elevation of 175 ft recently reported a 
sustained wind of 53 mph (85 km/h) and a gust of 69 mph (111 km/h).
 
The estimated minimum central pressure is 991 mb (29.27 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
Key messages for Lala can be found in the Tropical Cyclone
Discussion under AWIPS header HFOTCDCP2 and WMO header WTPA42 PHFO.
 
WIND: Tropical storm conditions continue across portions of the Big
Island of Hawaii and Maui County, with the strongest winds occurring
in areas of higher terrain. Tropical storm conditions will spread
across Oahu this morning and Kauai County later today. Wind speeds
atop mountains and on the windward and leeward slopes are often up
to 30 percent stronger than the near-surface winds indicated in this
advisory, and in some elevated locations could be even greater.
 
RAINFALL: Lala is expected to produce additional rainfall of 1 to 3
inches across windward portions of the the Big Island and windward
Maui, with maximum storm total of 30 to 35 inches over the windward
Big Island. Across the remainder of the island chain total rainfall
of 2 to 6 inches is expected, with the highest totals over windward
Kauai. This rainfall may produce life-threatening flooding and
mudslides, especially in areas of steep terrain.
 
For a complete depiction of forecast rainfall associated with Lala,
please see the National Weather Service Storm Total Rainfall Graphic
available at hurricanes.gov/graphics_cp2.shtml?rainqpf
 
For a list of rainfall observations and wind reports associated with
Lala, see the companion storm summary at WBCSCCNS2 with the WMO
header ACUS42 KWBC or at the following link:
www.wpc.ncep.noaa.gov/discussions/nfdscc2.html.
 
STORM SURGE: The combination of a dangerous storm surge and the
tide will cause normally dry areas near the coast to be flooded by
rising waters moving inland from the shoreline. The water could
reach the following heights above ground somewhere in the indicated
areas if the peak surge occurs at the time of high tide...
 
Oahu...1-2 ft
Kauai...1-2 ft
 
The deepest water will occur along the immediate coast, where the
surge will be accompanied by large and dangerous waves.
Surge-related flooding depends on the relative timing of the surge
and the tidal cycle, and can vary greatly over short distances. For
information specific to your area, please see products issued by
your local National Weather Service forecast office.
 
For a complete depiction of areas at risk of storm surge inundation,
please see the National Weather Service Peak Storm Surge Graphic,
available at hurricanes.gov/graphics_cp2.shtml?peakSurge.
 
SURF: Swells generated by Lala will continue to build westward
across the exposed windward waters today. Swells will also build
over the exposed leeward waters as Lala passes south of the islands.
These swells are likely to cause life-threatening surf and rip
current conditions. Please consult products from your local weather
office.
 
 
NEXT ADVISORY
-------------
Next intermediate advisory at 800 AM HST.
Next complete advisory at 1100 AM HST.
 
$$
Forecaster Reinhart