National Weather Service Marine Forecast FZPN40 PHFO

FZPN40 PHFO 191007
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1100 UTC WED AUG 19 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC AUG 19 2026. 24 HOUR FORECAST VALID 0600 UTC AUG 20 2026. 48 HOUR FORECAST VALID 0600 UTC AUG 21 2026.

.WARNINGS.

HURRICANE WARNING

.HURRICANE LALA NEAR 21.0N 169.7W 947 MB AT 0900 UTC AUG 19 MOVING NW OR 305 DEG AT 8 KT. MAXIMUM SUSTAINED WINDS 115 KT GUSTS 140 KT. TROPICAL STORM FORCE WINDS WITHIN 100 NM N SEMICIRCLE...90 NM SE QUADRANT AND 50 NM SW QUADRANT. SEAS 4 M OR GREATER WITHIN 180 NM N SEMICIRCLE...105 NM SE QUADRANT AND 135 NM SW QUADRANT WITH SEAS TO 10 M. SEAS 2.5 TO 4 M ELSEWHERE FROM 17N TO 26N BETWEEN 165W AND 175W. WINDS 20 TO 30 KT ELSEWHERE FROM 18N TO 26N BETWEEN 164W AND 174W. SCATTERED MODERATE TO STRONG TSTMS WITHIN 60 NM OF CENTER. .24 HOUR FORECAST HURRICANE LALA NEAR 23.1N 171.7W. MAXIMUM SUSTAINED WINDS 100 KT GUSTS 120 KT. TROPICAL STORM FORCE WINDS WITHIN 90 NM NW AND SE QUADRANTS...110 NM NE QUADRANT AND 60 NM SW QUADRANT. SEAS 4 TO 10 M FROM 21N TO 26N BETWEEN 168W AND 175W. SEAS 2.5 TO 4 M ELSEWHERE FROM 19N TO 27N BETWEEN 166W AND 179W. WINDS 20 TO 30 KT ELSEWHERE FROM 21N TO 27N BETWEEN 166W AND 174W. .48 HOUR FORECAST HURRICANE LALA NEAR 26.1N 171.8W. MAXIMUM SUSTAINED WINDS 90 KT GUSTS 110 KT. TROPICAL STORM FORCE WINDS WITHIN 110 NM NW AND SE QUADRANTS...130 NM NE QUADRANT AND 80 NM SW QUADRANT. SEAS 4 TO 10 M FROM 23N TO 29N BETWEEN 168W AND 176W. SEAS 2.5 TO 4 M ELSEWHERE N OF 21N W OF 167W. WINDS 20 TO 30 KT ELSEWHERE FROM 23N TO 30N BETWEEN 166W AND 176W.

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.

GALE WARNING

.24 HOUR FORECAST NEW LOW NEAR 11N140W 1008 MB. WINDS 20 TO 25 KT AND SEAS 2.5 TO 3 M WITHIN 240 NM N SEMICIRCLE OF LOW. .48 HOUR FORECAST POSSIBLE T.C. LOW NEAR 12N143W 1000 MB. WINDS 25 TO 35 KT WITHIN 150 NM N SEMICIRCLE. WINDS 20 TO 30 KT AND SEAS 2.5 TO 4 M ELSEWHERE FROM 10N TO 19N BETWEEN 140W AND 147W.

.SYNOPSIS AND FORECAST

LOW 20N148W 1012 MB
TROUGH FROM 14N154W TO LOW TO 25N146W... BOTH MOVING W SLOWLY. ISOLATED MODERATE TSTMS FROM 20N TO 24N BETWEEN 143W AND 149W. .24 HOUR FORECAST LOW OPENED TO A TROUGH FROM 17N151W TO 25N151W. .48 HOUR FORECAST TROUGH FROM 20N155W TO 25N156W.

.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 07N140W 07N142W 09N146W 08N154W 13N170W 09N180W. SCATTERED MODERATE TSTMS S OF TROUGH E OF 153W...AND W OF 165W...AND WITHIN 180 NM N OF TROUGH E OF 143W...AND W OF 157W. ISOLATED MODERATE TSTMS ELSEWHERE S OF 14N.

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.FORECASTER TSAMOUS. HONOLULU HI.