FZPN40 PHFO 200319

HSFNP 



HIGH SEAS FORECAST

NATIONAL WEATHER SERVICE HONOLULU HI

0500 UTC FRI MAR 20 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 20 2026.

24 HOUR FORECAST VALID 0000 UTC MAR 21 2026.

48 HOUR FORECAST VALID 0000 UTC MAR 22 2026.



.WARNINGS.



...GALE WARNING...

.LOW 24N165W 1007 MB NEARLY STATIONARY. WARM FRONT FROM LOW TO 

25N165W 25N161W 24N158W MOVING E SLOWLY. TROUGH FROM LOW TO 21N163W

19N163W 15N170W 13N180W MOVING E SLOWLY. SECOND TROUGH FROM LOW 

22N170W 24N179W MOVING SE SLOWLY. E WINDS 20 TO 30 KT N OF OF 

LINE 30N145W 25N155W 24N172W. SCATTERED MODERATE TSTMS WITHIN 180

NM OF FRONT. ISOLATED MODERATE TSTMS WITHIN 60 NM OF FIRST TROUGH. 

.24 HOUR FORECAST COMPLEX LOW 24N166W 1007 MB. NEW SECOND LOW 

25N157W 1009 MB. WARM FRONT FROM SECOND LOW TO 25N154W 24N151W. 

TROUGH FROM SECOND LOW TO FIRST LOW TO 20N163W 14N170W. SECOND 

TROUGH FROM FIRST LOW 20N171W 20N175W. WINDS 30 TO 35 KT N OF 26N 

BETWEEN 150W AND 160W. WINDS 20 TO 30 KT ELSEWHERE N OF LINE 

30N145W 24N158W 23N175W. 

.48 HOUR FORECAST COMPLEX LOW 25N162W 1006 MB. SECOND LOW NEAR 

29N157W 1003 MB. STATIONARY FRONT FROM FIRST LOW TO SECOND LOW. 

WARM FRONT FROM SECOND LOW 29N151W 29N150W. TROUGH FROM SECOND LOW

TO 25N159W TO FIRST LOW 19N168W. SECOND TROUGH 25N158W 12N170W. 

WINDS 30 TO 35 KT WITHIN 180 NM N SEMICIRCLE OF LOWS. WINDS 20 TO 

30 KT ELSEWHERE N OF A LINE 30N147W 27N149W 23N166W 23N171W.



.SYNOPSIS AND FORECAST.



.TROUGH 26N149W 20N155W MOVING NW 10 KT. ISOLATED MODERATE TSTMS 

WITHIN 270 NM E AND SE OF TROUGH.

.24 HOUR FORECAST TROUGH 27N151W 23N155W.

.48 HOUR FORECAST TROUGH MERGED WITH COMPLEX LOW DESCRIBED ABOVE.



.COLD FRONT 30N145W 27N148W 27N156W 27N163W MOVING NE 10 KT E OF

148W AND NEARLY STATIONARY ELSEWHERE.

.24 HOUR FORECAST FRONT MOVED N OF AREA AND STATIONARY FRONT 

ABSORBED BY COMPLEX LOW DESCRIBED ABOVE.



.FRONT NEAR 30N179W 29N179W MOVING NE SLOWLY. 

.24 HOUR FORECAST FRONT 30N178W 28N179W 26N180W. 

.48 HOUR FORECAST FRONT 30N178W 28N180W. 



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



.SEAS 3 TO 4.5 M N OF 25N BETWEEN 163W AND 174W. SEAS 2.5 TO 3 M 

ELSEWHERE NW OF A LINE 30N150W 25N157W 19N170W 14N180W.

.24 HOUR FORECAST SEAS 4 TO 5 M N OF LINE 30N152W 26N160W 

24N170W. SEAS 2.5 TO 4 M ELSEWHERE N OF LINE 30N144W 22N156W 

14N170W 15N180W.

.48 HOUR FORECAST SEAS 4 TO 5.5 M N OF 25N BETWEEN 156W AND 170W.

SEAS 2.5 TO 4 M ELSEWHERE N OF LINE 30N146W 25N150W 15N170W 

10N180W.



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



.ITCZ 01N140W 01N150W.



$$



.FORECASTER ALMANZA. HONOLULU HI.