Advisories

000
WTPA32 PHFO 151452
TCPCP2
 
BULLETIN
Tropical Storm Lala Advisory Number  13
NWS Central Pacific Hurricane Center Honolulu HI   CP012026
Issued by NWS National Hurricane Center Miami FL
500 AM HST Sat Aug 15 2026
 
...OUTER RAINBANDS FROM LALA SPREADING OVER THE BIG ISLAND OF
HAWAII...
...HEAVY RAINFALL AND FLOODING AND STRONG WINDS EXPECTED ACROSS THE
HAWAIIAN ISLANDS THIS WEEKEND...
 
 
SUMMARY OF 500 AM HST...1500 UTC...INFORMATION
----------------------------------------------
LOCATION...17.8N 154.6W
ABOUT 110 MI...175 KM SE OF SOUTH POINT HAWAII
ABOUT 325 MI...520 KM SE OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...65 MPH...100 KM/H
PRESENT MOVEMENT...WNW OR 285 DEGREES AT 13 MPH...20 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 Hurricane Warning is in effect for...
* Hawaii County
 
A Tropical Storm 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 Hurricane Warning means that hurricane conditions are expected
somewhere within the warning area, this case within the next 12
hours. Preparations to protect life and property should now be
complete.
 
A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area within 36 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 17.8 North, longitude 154.6 West. Lala is
moving toward the west-northwest near 13 mph (20 km/h). Some
erratic motion is likely later today and tonight while Lala
interacts with the Big Island of Hawaii. After passing the Big
Island, Lala is expected to turn westward on Sunday with an
increase in forward speed, with the core of the storm staying south
of remainder of the main Hawaiian Islands and the easternmost
Northwestern Hawaiian Islands through the early part of next week.
 
Maximum sustained winds are near 65 mph (100 km/h) with higher
gusts.  Some strengthening is possible today, and Lala could be
near or at hurricane intensity while it is near the Big Island of
Hawaii. Weakening is expected tonight and on Sunday, but some
restrengthening is forecast by late Monday and Tuesday.
 
Tropical-storm-force winds extend outward up to 205 miles (335 km)
from the center. Strong tropical-storm-force wind gusts are
occurring on the Hawaiian Islands from the Big Island to Oahu.
 
The estimated minimum central pressure is 991 mb (29.27 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
Key messages for Tropical Storm Lala can be found in the Tropical
Cyclone Discussion under AWIPS header HFOTCDCP2 and WMO header
WTPA42 PHFO.
 
WIND: Tropical storm conditions are beginning on the Big Island of
Hawaii, with hurricane conditions expected later today. Tropical
storm conditions are expected in Maui County later today and
tonight, on Oahu tonight and Sunday, and in Kauai County on Sunday.
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 rainfall totals of 10 to 20
inches across the Big Island, with maximum totals of 25 inches
possible. Rainfall of 8 to 12 inches is expected across eastern
Maui, with totals of 4 to 6 inches, and maximum amounts of 8 inches,
across western Maui and the remainder of the island chain. This
rainfall will 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
 
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...
 
Hawaii...1 to 3 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 are steadily building along
east-facing shores and will continue to increase through the
weekend. Swells will also build along exposed southern shores 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 Berg