859
FZPN40 PHFO 180317
HSFNP

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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW NEAR 07N178W 1008 MB MOVING W SLOWLY. SCATTERED
MODERATE TSTMS N OF LOW FROM 11N TO 15N W OF 172W.
.24 HOUR FORECAST LOW MOVED W OF AREA.
.48 HOUR FORECAST NEW LOW 06N170W 1009 MB.

.TROUGH 30N153W TO 28N160W TO 26N165W MOVING W 10 KT.
.24 HOUR FORECAST TROUGH 29N166W TO 25N169W.
.48 HOUR FORECAST TROUGH DISSIPATED. NEW TROUGH 29N178W TO
26N180W.

.TROUGH 15N145W TO 18N146W TO 21N148W MOVING W SLOWLY.
.24 HOUR FORECAST TROUGH 16N150W TO 20N154W.
.48 HOUR FORECAST TROUGH 18N158W TO 21N158W.

.TROUGH 05N144W TO 07N143W TO 11N142W MOVING W 10 KT. ISOLATED
MODERATE TSTMS FROM 05N TO 07N BETWEEN 143W AND 146W.
.24 HOUR FORECAST TROUGH 05N147W TO 07N147W TO 11N148W.
.48 HOUR FORECAST TROUGH MERGED INTO ITCZ.

.WINDS 20 TO 25 KT FROM 12N TO 25N BETWEEN 165W AND 175W...AND
FROM 14N TO 24N BETWEEN 154W AND 161W.
.24 HOUR FORECAST WINDS 20 TO 25 KT 13N TO 26N BETWEEN 148W AND
166W.
.48 HOUR FORECAST WINDS 20 TO 25 KT FROM 14N TO 24N BETWEEN 151W
AND 161W.

.SEAS 2.5 M TO 3 M FROM 11N TO 24N BETWEEN 162W AND 179W...AND N OF
15N AND E OF 162W.
.24 HOUR FORECAST SEAS 2.5 TO 3 M FROM 12N TO 24N W OF 155W...AND
N OF 17N BETWEEN 142W AND 155W.
.48 HOUR FORECAST SEAS 2.5 M TO 3 M FROM 14N TO 18N W OF 167W...
AND N OF 15N BETWEEN 142W AND 167W.

.WINDS 20 KT OR LESS AND SEAS 2.5 M OR LOWER OVER REMAINDER OF
FORECAST AREA.

.ITCZ 05N140W TO 06N143W...AND 06N146W TO 08N159W TO 07N166W.
SCATTERED MODERATE TSTMS FROM 03N TO 11N BETWEEN 150W AND
158W...AND FROM 06N TO 08N BETWEEN 163W AND 166W.

.MONSOON TROUGH 07N166W TO LOW MENTIONED ABOVE TO 07N180W.
SCATTERED MODERATE TSTMS N OF TROUGH FROM 07N TO 09N BETWEEN 166W
AND 174W...AND S OF TROUGH FROM 03N TO 04N W OF 179W.

$$

.FORECASTER CHAN. HONOLULU HI.