FZPN40 PHFO 190306

HSFNP 



HIGH SEAS FORECAST

NATIONAL WEATHER SERVICE HONOLULU HI

0500 UTC THU MAR 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC MAR 19 2026.

24 HOUR FORECAST VALID 0000 UTC MAR 20 2026.

48 HOUR FORECAST VALID 0000 UTC MAR 21 2026.



.WARNINGS.



...GALE WARNING...

.LOW 24N169W 1007 MB MOVING ESE 10 KT. TROUGH FROM LOW TO 27N180W 

MOVING ESE SLOWLY. WARM FRONT FROM LOW TO 26N161W MOVING E 10 KT. 

SECOND TROUGH FROM LOW TO 20N170W 16N180W MOVING E SLOWLY. E WINDS 

20 TO 30 KT N OF WARM FRONT AND FIRST TROUGH. ISOLATED MODERATE 

TSTMS FROM 21N TO 27N BETWEEN 161W AND 168W.

.24 HOUR FORECAST LOW 23N165W 1008 MB. TROUGH FROM LOW TO 24N175W 

30N179W. WARM FRONT FROM LOW TO 26N156W. SECOND TROUGH FROM LOW TO 

20N164W 14N173W. E WINDS 20 TO 30 KT N OF WARM FRONT AND FIRST 

TROUGH.

.48 HOUR FORECAST LOW 23N163W 1007 MB. TROUGH FROM LOW TO 22N174W 

30N178W. WARM FRONT FROM LOW TO 28N152W. SECOND TROUGH FROM LOW TO 

16N170W. NE TO E WINDS 20 TO 35 KT N OF WARM FRONT AND FIRST TROUGH 

E OF 174W.



.SYNOPSIS AND FORECAST.



.TROUGH 30N145W 18N155W 15N170W MOVING ENE SLOWLY. ISOLATED 

MODERATE TSTMS WITHIN 270 NM E AND SE OF TROUGH E OF 155W...AND 

WITHIN 150 NM S OF TROUGH W OF 165W.

.24 HOUR FORECAST TROUGH 30N147W 22N153W.

.48 HOUR FORECAST TROUGH 30N147W 28N152W. NE WINDS 20 TO 30 KT N OF 

TROUGH.



.COLD FRONT 30N155W 29N160W MOVING ESE 15 KT. 

.24 HOUR FORECAST FRONT DISSIPATED.



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



.SEAS 2.5 TO 4 M N OF LINE 30N155W 15N160W 13N180W. 

.24 HOUR FORECAST SEAS 4.5 TO 5 M FROM 27N TO 29N BETWEEN 164W AND 

171W. SEAS 2.5 TO 4.5 M ELSEWHERE N OF LINE 30N147W 24N165W 

05N180W.

.48 HOUR FORECAST SEAS 4.5 TO 5 M N OF 26N BETWEEN 158W AND 167W. 

SEAS 2.5 TO 4.5 M ELSEWHERE N OF LINE 30N147W 21N165W 15N180W.



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



.ITCZ 06N161W 06N169W. ISOLATED MODERATE TSTMS FROM 04N TO 08N 

BETWEEN 161W AND 169W.



$$



.FORECASTER WROE. HONOLULU HI.