The High Seas Forecast for the Central North Pacific

High Seas Forecast Issued: 07/18/2026 01:25:41 PM UTC
                        
919
FZPN40 PHFO 180325
HSFNP

HIGH SEAS FORECAST
NATIONAL WEATHER SERVICE HONOLULU HI
0500 UTC SAT JUL 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC JUL 18 2026.
24 HOUR FORECAST VALID 0000 UTC JUL 19 2026.
48 HOUR FORECAST VALID 0000 UTC JUL 20 2026.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW 14N167W 1007 MB MOVING W SLOWLY. MONSOON TROUGH 08N180W
TO LOW. WINDS 20 TO 30 KT WITHIN 120 NM OF N SEMICIRCLE.
.24 HOUR FORECAST LOW WEAKENS TO TROUGH. TROUGH 10N180W 15N175W.
WINDS 20 TO 25 KT WITHIN 120 NM OF N SEMICIRCLE.
.48 HOUR FORECAST TROUGH 15N177W 10N177W.

.LOW 03N152W 1008 MB MOVING NW 5 KT. MONSOON TROUGH 02N159W TO LOW
TO 07N147W.
.24 HOUR FORECAST LOW 07N155W 1008 MB. MONSOON TROUGH 03N160W
TO LOW TO 09N150W.
.48 HOUR FORECAST LOW 09N159W 1009 MB. MONSOON TROUGH 05N165W TO
LOW TO 05N155W.

.LOW 09N143W 1006 MB MOVING W 5 KT. MONSOON TROUGH 07N147W TO LOW
TO 09N140W.
.24 HOUR FORECAST LOW 09N146W 1006 MB. MONSOON TROUGH 09N150W
TO LOW TO 10N140W.
.48 HOUR FORECAST LOW 05N152W 1007 MB. MONSOON TROUGH 05N155W
TO LOW TO 08N140W.

.TROUGH 30N172W 27N172W MOVING NEARLY STATIONARY.
.24 HOUR FORECAST TROUGH 30N171W 27N172W.
.48 HOUR FORECAST TROUGH DISSIPATED.

.24 HOUR FORECAST WINDS 20 TO 25 KT FROM 15N TO 22N BETWEEN 160W
AND 155W.
.48 HOUR FORECAST WIND DIMINISHING TO 20 KT OR LESS.

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

.SEAS 2.5 TO 3 M FROM 18N TO 14N BETWEEN 168W AND 164W.
.24 HOUR FORECAST SEAS 2.5 TO 3 M FROM 15N TO 20N BETWEEN 177W
AND 173W...AND FROM 10N TO 15N BETWEEN 157W AND 153W.
.48 HOUR FORECAST SEAS SUBSIDING TO 2.5 M OR LESS.

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

.SCATTERED MODERATE TSTMS FROM 08N TO 15N BETWEEN 155W AND
142W...AND FROM 08N TO 10N BETWEEN 180W AND 177W.

$$

.FORECASTER PECHACEK. HONOLULU HI.