279
FZPN40 PHFO 170304
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0500 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC AUG 17 2026.
24 HOUR FORECAST VALID 0000 UTC AUG 18 2026.
48 HOUR FORECAST VALID 0000 UTC AUG 19 2026.

.WARNINGS.
...TROPICAL STORM WARNING...
.TROPICAL STORM LALA NEAR 20.7N 161.6W 994 MB AT 0300 UTC AUG 17
MOVING W OR 265 DEG AT 14 KT. MAXIMUM SUSTAINED WINDS 55 KT
GUSTS 65 KT. TROPICAL STORM FORCE WINDS WITHIN 50 NM S
SEMICIRCLE...120 NM NE QUADRANT AND 90 NM NW QUADRANT.SEAS 4 M
OR GREATER WITHIN 120 NM S SEMICIRCLE...210 NM NE QUADRANT AND
240 NM NW QUADRANT WITH SEAS TO 6 M. WINDS 20 TO 30 KT AND SEAS
2.5 TO 4 M ELSEWHERE FROM 15N TO 25N BETWEEN 165W AND 155W.
ISOLATED MODERATE TSTMS WITHIN 300 NM OF CENTER.
.24 HOUR FORECAST TROPICAL STORM LALA NEAR 20.6N 165.3W. MAXIMUM
SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE WINDS
WITHIN 50 NM S SEMICIRCLE...100 NM NE QUADRANT AND 80 NM NW
QUADRANT. SEAS 4 M OR GREATER WITHIN 120 NM OF CENTER WITH
SEAS TO 5 M. WINDS 20 TO 30 KT AND SEAS 2.5 TO 4 M ELSEWHERE
FROM 17N TO 27N BETWEEN 170W AND 160W.
.48 HOUR FORECAST TROPICAL STORM LALA NEAR 20.7N 168.9W. MAXIMUM
SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE WINDS
WITHIN 100 NM NE QUADRANT...70 NM SE QUADRANT...50 NM SW
QUADRANT...AND 90 NM NW QUADRANT. SEAS 4 M OR GREATER WITHIN
180 NM OF CENTER WITH SEAS TO 5.5 M. WINDS 20 TO 30 KT AND SEAS
2.5 TO 4 M ELSEWHERE FROM 18N TO 27N BETWEEN 175W AND 165W.

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 17N140W 1006 MB MOVING W 10 KT. TROUGH FROM LOW TO 05N140W.
.24 HOUR FORECAST LOW 17N143W 1007 MB. TROUGH FROM LOW TO
10N143W.
.48 HOUR FORECAST LOW 18N146W 1011 MB. TROUGH FROM LOW TO
10N150W.

.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 05N180W 05N175W 12N164W 07N153W. SCATTERED MODERATE
TSTMS WITHIN 120 NM OF TROUGH.

.ITCZ 00Z158W 00Z145W 02N140W ISOLATED MODERATE TSTMS WITHIN
150 NM OF ITCZ.

.ISOLATED MODERATE TSTMS WITHIN 90 NM OF POINT 10N151W...AND N OF
28N W OF 178W. SCATTERED MODERATE TSTMS S OF 03S E OF 158W.

$$

.FORECASTER PECHACEK. HONOLULU HI.