606
FZPN40 PHFO 172307
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
2300 UTC MON AUG 17 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC AUG 17 2026.
24 HOUR FORECAST VALID 1800 UTC AUG 18 2026.
48 HOUR FORECAST VALID 1800 UTC AUG 19 2026.

.WARNINGS.

...HURRICANE WARNING...
.TROPICAL STORM LALA NEAR 20.4N 164.3W 994 MB AT 2100 UTC AUG 17
MOVING W OR 260 DEG AT 9 KT. MAXIMUM SUSTAINED WINDS 55 KT GUSTS
65 KT. TROPICAL STORM FORCE WINDS WITHIN 80 NM N SEMICIRCLE AND
50 NM S SEMICIRCLE. WINDS 2O TO 30 KT ELSEWHERE FROM 18N TO 26N
BETWEEN 160W AND 165W. SEAS 4 M OR GREATER WITHIN 120 NM NW
SEMICIRCLE WITH SEAS TO 5.5 M. SEAS 2.5 TO 3.5 M ELSEWHERE FROM
11N TO 29N BETWEEN 158W AND 170W. SCATTERED MODERATE TSTMS ARE
OCCURRING UP TO 90 NM W SEMICIRCLE.
.24 HOUR FORECAST HURRICANE LALA NEAR 20.5N 167.6W. MAXIMUM
SUSTAINED WINDS 65 KT GUSTS 75 KT. HURRICANE FORCE WINDS WITHIN 15
NM NW QUADRANT. TROPICAL STORM FORCE WINDS WITHIN 100 NM N
SEMICIRCLE AND 70 NM S SEMICIRCLE. WINDS 20 TO 30 KT FROM 18N TO
26N BETWEEN 166W AND 173W. SEAS 4 M OR GREATER FROM 20N TO 24N
BETWEEN 168W AND 172W WITH SEAS TO 9.5 M. SEAS 6 TO 9.5 M UP TO
100 NM N SEMICIRCLE. SEAS 4 TO 6 M ELSEWHERE FROM 20N TO 24N
BETWEEN 168W AND 172W. SEAS 2.5 TO 4 M REMAINDER OF AREA FROM 17N
TO 27N BETWEEN 165W AND 177W.
.48 HOUR FORECAST HURRICANE LALA NEAR 21.7N 170.5W. MAXIMUM
SUSTAINED WINDS 75 KT GUSTS 90 KT. HURRICANE FORCE WINDS 25 NM N
SEMICIRCLE AND 15 NM SE QUADRANT. TROPICAL STORM FORCE WINDS
WITHIN 100 NM N SEMICIRCLE...90 NM SE QUADRANT AND 60 NM SW
QUADRANT. WINDS 20 TO 30 KT ELSEWHERE FROM 22N TO 28N BETWEEN 168W
AND 176W. SEAS 4 M OR GREATER FROM 22N TO 26N BETWEEN 170W AND
175W WITH SEAS TO 8.5 M. SEAS 5.5 TO 8.5 M ELSEWHERE FROM 23N TO
25N BETWEEN 171W AND 174W. SEAS 2.5 TO 5 M ELSEWHERE FROM 20N TO
29N BETWEEN 167W 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 17N132W 1009 MB...TROUGH FROM 15N145W TO LOW TO 20N143W...
BOTH MOVING 10 KT. WINDS 20 TO 25 KT FROM 18N TO 21N BETWEEN 143W
AND 146W. SEAS 2.5 TO 3 M FROM 17N TO 21N BETWEEN 143W AND 148W.
.24 HOUR FORECAST LOW OPENED TO A TROUGH FROM 13N149W TO 20N145W
TO 26N140W. WINDS EASED BELOW 20 KT AND SEAS BECAME LESS THAN 2.5
M.
.48 HOUR FORECAST TROUGH 15N152W TO 18N150W TO 23N150W. WINDS
BELOW 20 KT AND SEAS LESS THAN 2.5 M.

.LOW 1008M 09N175W MOVING W SLOWLY. WINDS BELOW 25N AND SEAS LESS
THAN 2.5 M.
.24 HOUR FORECAST LOW 11N173W. WINDS BELOW 25N AND SEAS LESS THAN
2.5 M.
.48 HOUR FORECAST LOW 10N178W. WINDS BELOW 25N AND SEAS LESS THAN
2.5 M.

.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 15N167W TO LOW AT 09N175W TO 07N180W. SCATTERED
MODERATE TSTMS WITHIN 200 NM OF TROUGH.

.ITCZ 06N140W TO 01N151W TO 00N162W. SCATTERED MODERATE TO STRONG
TSTMS FROM 00N TO 07N E OF 164W.

.SCATTERED MODERATE TSTMS FROM 00N TO 4N W OF 170W.

$$

.FORECASTER CHAN. HONOLULU HI.