225
FZPN40 PHFO 181444
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC TUE AUG 18 2026

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS

SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT
OF THE HIGHEST 1/3 OF THE WAVES. INDIVIDUAL WAVES MAY BE MORE THAN
TWICE THE SIGNIFICANT WAVE HEIGHT.

THIS HIGH SEAS FORECAST USES 1-MINUTE AVERAGE WINDS WHICH MAY BE
HIGHER THAN 10-MINUTE AVERAGE WINDS.

SECURITE

NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 180W

SYNOPSIS VALID 1200 UTC AUG 18 2026.
24 HOUR FORECAST VALID 1200 UTC AUG 19 2026.
48 HOUR FORECAST VALID 1200 UTC AUG 20 2026.

.WARNINGS.

...HURRICANE WARNING...
.HURRICANE LALA NEAR 20.5N 167.2W 981 MB AT 1500 UTC AUG 18
MOVING W OR 275 DEG AT 8 KT. MAXIMUM SUSTAINED WINDS 75 KT GUSTS
90 KT. TROPICAL STORM FORCE WINDS WITHIN 80 NM NE QUADRANT...70
NM SE QUADRANT...50 NM SW QUADRANT...AND 90 NM NW QUADRANT. SEAS 4
M OR GREATER WITHIN 180 NM N SEMICIRCLE...90 NM SE QUADRANT AND 150
NM SW QUADRANT WITH SEAS TO 7 M. WINDS 20 TO 30 KT AND SEAS 2.5 TO
4 M ELSEWHERE FROM 18N TO 26N BETWEEN 162W AND 172W. SCATTERED
MODERATE TO STRONG TSTMS WITHIN 60 NM OF CENTER.
.24 HOUR FORECAST HURRICANE LALA NEAR 21.5N 169.8W. MAXIMUM
SUSTAINED WINDS 85 KT GUSTS 105 KT. TROPICAL STORM FORCE WINDS
WITHIN 90 NM NW AND SE QUADRANTS...110 NM NE QUADRANT AND 60 NM
SW QUADRANT. SEAS 4 TO 8 M FROM 20N TO 25N BETWEEN 166W AND 172W.
WINDS 20 TO 30 KT AND SEAS 2.5 TO 4 M ELSEWHERE FROM 18N TO 26N
BETWEEN 164W AND 175W.
.48 HOUR FORECAST HURRICANE LALA NEAR 24.0N 171.7W. MAXIMUM
SUSTAINED WINDS 80 KT GUSTS 100 KT. TROPICAL STORM FORCE WINDS
WITHIN 100 NM NW AND SE QUADRANTS...120 NM NE QUADRANT AND 70 NM
SW QUADRANT. SEAS 4 TO 9 M FROM 22N TO 27N BETWEEN 168W AND 175W.
WINDS 20 TO 30 KT ELSEWHERE FROM 21N TO 28N BETWEEN 166W AND 174W.
SEAS 2.5 TO 4 M ELSEWHERE FROM 20N TO 28N BETWEEN 166W AND 178W.

FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE
USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE
AND INTENSITY.

SEE THE LATEST BULLETIN ISSUED BY NHC UNDER WMO HEADER WTPA22
PHFO.


.SYNOPSIS AND FORECAST

.LOW 19N146W 1009 MB...TROUGH FROM 22N140W TO 21N144W TO LOW TO
13N149W TO 12N150W. SCATTERED MODERATE TO STRONG TSTMS WITHIN 150
NM N OF LOW.
.24 HOUR FORECAST LOW OPENED TO A TROUGH FROM 25N140W TO 22N147W
TO 15N150W.
.48 HOUR FORECAST TROUGH 25N150W 20N151W 16N153W.

.48 HOUR FORECAST NEW LOW NEAR 11N140W 1007 MB.

.WINDS 20 KT OR LESS OVER THE REMAINDER OF FORECAST AREA.

.SEAS 2.5 M OR LESS OVER THE REMAINDER OF FORECAST AREA.

.MONSOON TROUGH 10N163W TO 11N172W TO 08N180W. SCATTERED
MODERATE TSTMS WITHIN 180 NM N OF TROUGH...AND S OF TROUGH.

.ITCZ 09N140W TO 10N146W TO 08N157W. SCATTERED MODERATE TSTMS
FROM 00N TO 10N E OF 163W.


$$

.FORECASTER TSAMOUS. HONOLULU HI.