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FZPN01 KWBC 282143
HSFEP1

HIGH SEAS FORECAST 
NWS OCEAN PREDICTION CENTER WASHINGTON DC 
2230 UTC THU MAR 28 2024 

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS 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. 

ONLY YOU KNOW THE WEATHER AT YOUR POSITION. REPORT IT TO THE 
NATIONAL WEATHER SERVICE. EMAIL US AT 
[email protected](LOWERCASE). 

FROM APRIL 1 TO OCTOBER 15, DUE TO THE CLIMATOLOGY OF THE NORTH 
PACIFIC, HIGH SEAS FORECASTS WILL ONCE AGAIN INCLUDE ALL 
FORECASTS OF WINDS 20 TO 30 KNOTS AND SEAS 8 FEET OR GREATER. 
ALSO, PLEASE SEE HTTPS://OCEAN.WEATHER.GOV/PROPOSED_HIGH_SEAS 
_TROPICAL.PHP FOR A PROPOSAL, AND A REQUEST FOR COMMENTS, TO 
INCREASE READABILITY OF THE HIGH SEAS FORECAST (WEB ADDRESS 
LOWERCASE). 

SECURITE 

PACIFIC N OF 30N AND S OF 67N E OF A LINE FROM BERING STRAIT 
TO 50N 160E 

ALL FORECASTS VALID OVER ICE FREE FORECAST WATERS 

SYNOPSIS VALID 1800 UTC MAR 28. 
24 HOUR FORECAST VALID 1800 UTC MAR 29. 
48 HOUR FORECAST VALID 1800 UTC MAR 30. 

.WARNINGS. 

...STORM WARNING... 
.LOW 51N176W 980 MB MOVING NE 25 KT. WITHIN 300 NM NW 
SEMICIRCLE...AND FROM 47N TO 51N BETWEEN 168W AND 179W WINDS 35 
TO 45 KT. SEAS 13 TO 22 FT. ELSEWHERE WITHIN 480 NM N...720 NM 
E...420 NM S...AND 360 NM W QUADRANTS WINDS 25 TO 35 KT. SEAS 9 
TO 15 FT.
.06 HOUR FORECAST LOW 53N173W 979 MB. WITHIN 240 NM NW AND 300 
NM SE SEMICIRCLES WINDS 35 TO 50 KT. SEAS 18 TO 25 FT.
.24 HOUR FORECAST LOW 59N166W 986 MB. WITHIN 480 NM N...780 NM 
E...420 NM S...AND 540 NM W QUADRANTS WINDS 25 TO 40 KT. SEAS 12 
TO 21 FT.
.48 HOUR FORECAST LOW 61N167W 987 MB. WITHIN 480 NM W AND NW 
QUADRANTS...AND 300 NM S QUADRANT WINDS 25 TO 35 KT. SEAS 8 TO 
14 FT.

...GALE WARNING... 
.LOW 48N129W 992 MB MOVING SW 10 KT. FROM 41N TO 51N BETWEEN 
123W AND 139W WINDS 25 TO 35 KT. SEAS 13 TO 22 FT.
.24 HOUR FORECAST LOW 44N130W 1007 MB. WITHIN 360 NM W AND NW 
QUADRANTS WINDS 25 TO 35 KT. SEAS 9 TO 15 FT.
.48 HOUR FORECAST LOW AND CONDITIONS ABSORBED BY LOW 36N124W 
DESCRIBED BELOW.

...GALE WARNING... 
.LOW 43N140W 1006 MB MOVING SE 30 KT. FROM 36N TO 45N BETWEEN 
137W AND 151W WINDS 25 TO 35 KT. SEAS 9 TO 15 FT. 
.24 HOUR FORECAST LOW 38N127W 995 MB. WITHIN 180 NM NW AND 300 
NM SW QUADRANTS WINDS 35 TO 45 KT. SEAS 13 TO 22 FT. ELSEWHERE 
FROM 30N TO 42N BETWEEN 122W AND 140W WINDS 25 TO 35 KT. SEAS 9 
TO 15 FT.
.48 HOUR FORECAST LOW 36N124W 999 MB. FROM 30N TO 46N BETWEEN 
121W AND 135W WINDS 25 TO 40 KT. SEAS 12 TO 21 FT.

...GALE WARNING... 
.LOW 43N168E 1004 MB MOVING SE 25 KT. FROM 31N TO 47N W OF 171E 
WINDS 25 TO 35 KT. SEAS 9 TO 16 FT. 
.24 HOUR FORECAST LOW 37N180W 1012 MB. FROM 30N TO 38N BETWEEN 
173W AND 171E WINDS 25 TO 35 KT. SEAS 9 TO 15 FT.
.48 HOUR FORECAST LOW AND CONDITIONS ABSORBED BY LOW 46N169W 
DESCRIBED BELOW.

...GALE WARNING... 
.LOW 48N172E 997 MB MOVING SE 15 KT. WITHIN 300 NM N AND 360 NM 
W QUADRANTS WINDS 25 TO 35 KT. SEAS 9 TO 15 FT. 
.24 HOUR FORECAST LOW 44N179E 1005 MB. WITHIN 360 NM NW 
QUADRANT...AND 540 NM S AND SW QUADRANTS WINDS 25 TO 35 KT. SEAS 
9 TO 17 FT. 
.48 HOUR FORECAST LOW 46N169W 1008 MB. WITHIN 540 NM S AND 660 
NM W QUADRANTS WINDS 25 TO 35 KT. SEAS 9 TO 17 FT.

...GALE WARNING... 
.LOW 40N177W 1004 MB MOVING NE 20 KT. WITHIN 480 NM E AND 720 NM 
S QUADRANTS WINDS 25 TO 40 KT. SEAS 12 TO 18 FT.
.24 HOUR FORECAST LOW 44N168W 1000 MB. FROM 34N TO 45N BETWEEN 
164W AND 170W WINDS 35 TO 45 KT. SEAS 12 TO 21 FT. ELSEWHERE 
WITHIN 420 NM E QUADRANT...840 NM S QUADRANT...AND 180 NM W 
SEMICIRCLE WINDS 25 TO 35 KT. SEAS 9 TO 15 FT.
.48 HOUR FORECAST LOW 56N157W 986 MB. WITHIN 540 NM NE...420 NM 
SW...AND 480 NM NW QUADRANTS AND FROM 39N TO 56N BETWEEN 147W 
AND 157W WINDS 25 TO 40 KT. SEAS 10 TO 19 FT.

...GALE WARNING... 
.48 HOUR FORECAST FROM 35N TO 50N W OF 165E WINDS 25 TO 35 KT. 
SEAS 9 TO 17 FT.

...GALE WARNING...
.48 HOUR FORECAST NEW LOW 55N175W 997 MB. WITHIN 360 NM SW AND 
300 NM NW QUADRANTS WINDS 25 TO 35 KT. SEAS 9 TO 15 FT.

.SYNOPSIS AND FORECAST. 

.LIGHT TO MODERATE FREEZING SPRAY N OF A LINE FROM 57N158W TO 
57N170W TO 56N179E TO 56N172E.
.24 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY N OF 55N W OF 
164W.
.48 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY N OF 56N W OF 
158W.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 44N TO 53N 
BETWEEN 158W AND 174W...AND WITHIN 300 NM NW OF A LINE FROM 
54N159W TO 52N172W TO 48N173E.
.24 HOUR FORECAST DENSE FOG N OF 57N W OF 156W...FROM 48N TO 62N 
BETWEEN 144W AND 157W...AND FROM 44N TO 52N BETWEEN 157W AND 
173W.
.48 HOUR FORECAST DENSE FOG N OF 56N BETWEEN 162W AND 178W...AND 
N OF 53N BETWEEN 142W AND 162W.

.FORECASTER NOLT. OCEAN PREDICTION CENTER.

NATIONAL HURRICANE CENTER MIAMI FL

E PACIFIC FROM THE EQUATOR TO 30N E OF 140W AND 03.4S TO THE
EQUATOR E OF 120W

SYNOPSIS VALID 1800 UTC THU MAR 28.
24 HOUR FORECAST VALID 1800 UTC FRI MAR 29.
48 HOUR FORECAST VALID 1800 UTC SAT MAR 30.

.WARNINGS.

...GALE WARNING... 
.WITHIN 30 NM OF A LINE FROM 16N95W TO 15N95W TO 14N95.5W N TO 
NE WINDS 30 TO 40 KT. SEAS 9 TO 13 FT. ELSEWHERE WITHIN 45 NM OF 
A LINE FROM 16N95W TO 15N95W TO 14N95.5W TO 12N97W N TO NE WINDS 
20 TO 30 KT. SEAS 8 TO 11 FT.
.12 HOUR FORECAST WITHIN 30 NM OF A LINE FROM 16N95W TO 15N95W 
TO 13N96W N TO NE WINDS 30 TO 40 KT. SEAS 10 TO 14 FT. ELSEWHERE 
WITHIN 60 NM OF A LINE FROM 16N95W TO 15N95W TO 13N96W TO 12N98W 
N TO NE WINDS 20 TO 30 KT. SEAS 8 TO 11 FT. REMAINDER OF THE 
AREA FROM 11N TO 14N BETWEEN 93W AND 99W WINDS 20 KT OR LESS. 
SEAS 8 TO 9 FT IN N TO NE SWELL.
.18 HOUR FORECAST WITHIN 15 NM OF A LINE FROM 16N95W TO 14N95W N 
TO NE WINDS 30 TO 35 KT. SEAS 9 TO 13 FT. ELSEWHERE WITHIN 45 NM 
OF A LINE FROM 16N95W TO 14N95W TO 12N96.5W TO 11N100W N TO NE 
WINDS 20 TO 30 KT. SEAS 9 TO 12 FT. REMAINDER OF AREA FROM 10N 
TO 14N BETWEEN 93W AND 100W WINDS 20 KT OF LESS. SEAS 8 TO 10 FT 
IN N TO NE SWELL.
.24 HOUR FORECAST WITHIN 30 NM OF A LINE FROM 16N95W TO 14N95W 
TO 12N97W N TO NE WINDS 20 TO 30 KT. SEAS 8 TO 11 FT. ELSEWHERE 
FROM 09N TO 13N BETWEEN 93W AND 102W WINDS 20 KT OR LESS. SEAS 8 
TO 11 FT IN N TO NE SWELL.
.30 HOUR FORECAST FROM 08N TO 13N BETWEEN 95W AND 103W WINDS 20 
KT OR LESS. SEAS 8 TO 9 FT PRIMARILY IN N TO NE SWELL.
.42 HOUR FORECAST FROM 06N TO 10N BETWEEN 99W AND 104W WINDS 20 
KT OR LESS. SEAS 8 FT PRIMARILY IN N TO NE SWELL.
.48 HOUR FORECAST FROM 06N TO 09N BETWEEN 102W AND 105W WINDS 20 
KT OR LESS. SEAS 8 FT PRIMARILY IN N TO NE SWELL.

.SYNOPSIS AND FORECAST.

.FROM 04N TO 17N W OF 130W...AND FROM 03N TO 10N BETWEEN 120W 
AND 130W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN MIXED NE AND NW 
SWELL.
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.12 HOUR FORECAST N OF A LINE FROM 30N125W TO 28N130W TO 30N140W 
WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN NW SWELL.
.24 HOUR FORECAST COLD FRONT FROM 30N135W TO 29N140W. N OF A 
LINE FROM 30N118W TO 26N126W TO 27N132W TO 30N140W WINDS 20 KT 
OR LESS. SEAS 8 TO 10 FT.  
.30 HOUR FORECAST COLD FRONT FROM 30N126W TO 27N140W. NW OF 
FRONT NW TO N WINDS 20 TO 25 KT. SEAS 9 TO 13 FT. ELSEWHERE N OF 
A LINE FROM 30N118W TO 25N125W TO 28N140W WINDS 20 KT OR LESS. 
SEAS 8 TO 9 FT IN NW SWELL.
.42 HOUR FORECAST COLD FRONT FROM 30N121W TO 25N130W TO 25N140W. 
NW OF FRONT NW TO N WINDS 20 TO 25 KT. SEAS 9 TO 12 FT IN NW 
SWELL...EXCEPT 12 TO 15 FT N OF A LINE FROM 30N123W TO 28N130W 
TO 30N135W. ELSEWHERE N OF 25N AND W OF 118W WINDS 20 KT OR 
LESS. SEAS 8 TO 9 FT IN NW SWELL.
.48 HOUR FORECAST COLD FRONT FROM 30N118W TO 24N130W TO 24N140W. 
NW OF FRONT NW TO N WINDS 20 TO 30 KT. SEAS 9 TO 12 FT IN NW 
SWELL...EXCEPT 12 TO 16 FT IN NW SWELL N OF A LINE FROM 30N121W 
TO 26N127W TO 30N136W. ELSEWHERE N OF 24N AND W OF 118W WINDS 20 
KT OR LESS. SEAS 8 TO 9 FT IN NW SWELL.

.18 HOUR FORECAST FROM 10N TO 11.5N E OF 89W...INCLUDING THE 
GULF OF PAPAGAYO...NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 8 
FT.
.24 HOUR FORECAST FROM 10N TO 11.5N E OF 90W...INCLUDING THE 
GULF OF PAPAGAYO...NE TO E WINDS 20 TO 25 KT. SEAS TO 8 FT.
.48 HOUR FORECAST LITTLE CHANGE.

.36 HOUR FORECAST GULF OF CALIFORNIA N OF 30N SW WINDS 20 TO 25 
KT. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST LITTLE CHANGE.

.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

CONVECTION VALID AT 2100 UTC THU MAR 28...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

AN EQUATORIAL TROUGH EXTENDS FROM A 1011 MB LOW PRESSURE OVER 
NORTHERN COLOMBIA TO 07N100W TO THE EQUATOR AT 120W. THE ITCZ IS 
SOUTH OF THE EQUATOR AND RUNS WESTWARD FROM 01S110W TO 03S125W. 
SCATTERED MODERATE CONVECTION IS NOTED FROM 02N TO 09N BETWEEN 
90W AND 120W. SCATTERED MODERATE TO ISOLATED STRONG CONVECTION 
IS FROM 02N TO 06N W OF 130W. 

$$

.FORECASTER GR. NATIONAL HURRICANE CENTER.