The High Seas Forecast for the Central North Pacific

High Seas Forecast   Issued: 09/01/2026 01:23:37 AM UTC

                        
919
FZPN40 PHFO 311523
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
1700 UTC MON AUG 31 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 31 2026.
24 HOUR FORECAST VALID 1200 UTC SEP 01 2026.
48 HOUR FORECAST VALID 1200 UTC SEP 02 2026.

.WARNINGS.

...HURRICANE WARNING...
.TROPICAL STORM LOWELL NEAR 12.9N 145.3W 997 MB AT 1500 UTC AUG
31 MOVING W OR 260 DEG AT 10 KT. MAXIMUM SUSTAINED WINDS 50 KT
GUSTS 60 KT. TROPICAL STORM FORCE WINDS WITHIN 40 NM E
SEMICIRCLE...70 NM SW QUADRANT AND 80 NM NW QUADRANT. WINDS 20
TO 34 KT ELSEWHERE WITHIN 110 NM N SEMICIRCLE AND 80 NM S
SEMICIRCLE. SEAS 4 M OR GREATER WITHIN 30 NM S SEMICIRCLE...60
NM NE QUADRANT AND 45 NM NW QUADRANT WITH SEAS TO 4.5 M. SEAS
2.5 TO 4 M ELSEWHERE WITHIN 210 NM W SEMICIRCLE...100 NM E
SEMICIRCLE. SCATTERED STRONG TSTMS WITHIN 90 NM NW QUADRANT.
.12 HOUR FORECAST HURRICANE LOWELL NEAR 13.0N 146.8W. MAXIMUM
SUSTAINED WINDS 65 KT GUSTS 80 KT.
.24 HOUR FORECAST HURRICANE LOWELL NEAR 13.2N 148.7W. MAXIMUM
SUSTAINED WINDS 80 KT GUSTS 100 KT. TROPICAL STORM FORCE WINDS
WITHIN 70 NM NE AND SW QUADRANTS...80 NM NW QUADRANT AND 60 NM SE
QUADRANT. WINDS 20 TO 34 KT ELSEWHERE WITHIN 120 NM N
SEMICIRCLE...80 NM S SEMICIRCLE. SEAS 4 M OR GREATER WITHIN 110 NM
N SEMICIRCLE...60 S SEMICIRCLE WITH SEAS TO 5 M. SEAS 2.5 TO 4 M
ELSEWHERE WITHIN 210 NM N SEMICIRCLE...140 NM S SEMICIRCLE.
.48 HOUR FORECAST HURRICANE LOWELL NEAR 13.7N 152.5W. MAXIMUM
SUSTAINED WINDS 100 KT GUSTS 120 KT. TROPICAL STORM FORCE WINDS
WITHIN 70 NM S SEMICIRCLE...90 NM NE QUADRANT AND 100 NM NW
QUADRANT. WINDS 20 TO 34 KT ELSEWHERE WITHIN 190 NM N
SEMICIRCLE...80 NM S SEMICIRCLE. SEAS 4 M OR GREATER WITHIN 180 NM
N SEMICIRCLE...90 NM S SEMICIRCLE WITH SEAS TO 6 M. SEAS 2.5 TO 4
M ELSEWHERE WITHIN 330 NM N SEMICIRCLE...180 NM S SEMICIRCLE.


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


.SYNOPSIS AND FORECAST

.TROUGH 26N142W 20N143W MOVING W 10 KT.
.48 HOUR FORECAST TROUGH DISSIPATED.

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

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

.MONSOON TROUGH 11N148W 09N156W 08N180W. SCATTERED STRONG TSTMS
WITHIN 210 NM N OF TROUGH E OF 164W AND ISOLATED MODERATE TSTMS
WITHIN 300 NM ELSEWHERE OF TROUGH.

.SCATTERED MODERATE TSTMS FROM S OF 07N E OF 153W.

.ISOLATED MODERATE TSTMS N OF 27N W OF 176W.


$$

.FORECASTER THOMAS. HONOLULU HI.