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FZPN01 KWBC 290344
HSFEP1

HIGH SEAS FORECAST 
NWS OCEAN PREDICTION CENTER WASHINGTON DC 
0430 UTC FRI MAR 29 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS 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 0000 UTC MAR 29. 
24 HOUR FORECAST VALID 0000 UTC MAR 30. 
48 HOUR FORECAST VALID 0000 UTC MAR 31. 

.WARNINGS. 

...GALE WARNING... 
.LOW 53N173W 980 MB MOVING NE 25 KT. WITHIN 300 NM OF 
CENTER...EXCEPT OUT TO 600 NM NE QUADRANT WINDS 30 TO 45 KT. 
SEAS 10 TO 23 FT. ELSEWHERE FROM 48N TO 58N BETWEEN 154W AND 
180W WINDS 20 TO 30 KT. SEAS 9 TO 15 FT. 
.24 HOUR FORECAST LOW 60N164W 990 MB. N OF 55N W OF 144W...ALSO 
FROM 48N TO 58N BETWEEN 142W AND 147W WINDS 20 TO 30 KT. SEAS 8 
TO 17 FT. 
.48 HOUR FORECAST LOW 60N167W 985 MB. FORECAST CONDITIONS 
DESCRIBED WITH LOW 60N155W. 

...GALE WARNING... 
.LOW 48N129W 993 MB MOVING S 10 KT. FROM 43N TO 50N E OF 141W 
WINDS 25 TO 35 KT. SEAS 9 TO 19 FT. 
.24 HOUR FORECAST LOW DISSIPATED WITH CONDITIONS DESCRIBED WITH 
LOW 38N126W. 

...GALE WARNING... 
.LOW 41N136W 1005 MB MOVING SE 20 KT. FROM 36N TO 41N BETWEEN 
134W AND 142W WINDS 25 TO 35 KT. SEAS 9 TO 15 FT. 
.24 HOUR FORECAST LOW 38N126W 993 MB. FROM 33N TO 41N BETWEEN 
123W AND 136W...ALSO FROM 40N TO 45N BETWEEN 131W AND 137W WINDS 
30 TO 45 KT. SEAS 13 TO 23 FT. ELSEWHERE FROM 30N TO 47N BETWEEN 
121W AND 139W WINDS 20 TO 30 KT. SEAS 9 TO 15 FT. 
.48 HOUR FORECAST LOW 35N122W 999 MB. FROM 30N TO 43N BETWEEN 
123W AND 131W WINDS 25 TO 40 KT. SEAS 9 TO 18 FT. ELSEWHERE 
BETWEEN 120W AND A LINE FROM 50N130W TO 30N137W WINDS 20 TO 30 
KT. SEAS TO 12 FT.

...GALE WARNING... 
.FROM 30N TO 42N BETWEEN 163E AND 170E WINDS 25 TO 35 KT. SEAS 9 
TO 16 FT. 
.24 HOUR FORECAST CONDITIONS DESCRIBED WITH LOW 45N177W. 

...GALE WARNING... 
.LOW 47N174E 1000 MB MOVING SE 15 KT. FROM 44N TO 49N BETWEEN 
170E AND 173E WINDS 25 TO 35 KT. SEAS 10 TO 16 FT. 
.24 HOUR FORECAST LOW 45N177W 1006 MB. FROM 39N TO 44N BETWEEN 
175E AND 177W WINDS 25 TO 35 KT. SEAS 9 TO 16 FT. 
.48 HOUR FORECAST LOW 48N166W 1007 MB. FROM 39N TO 48N BETWEEN 
161W AND 179E...ALSO FROM 48N TO 50N BETWEEN 171W AND 176E WINDS 
20 TO 30 KT. SEAS 9 TO 14 FT. 

...GALE WARNING... 
.LOW 37N177W 1008 MB MOVING NE 30 KT. FRONT EXTENDS FROM 47N169W 
TO LOW CENTER TO 30N177E. WITHIN 300 NM E AND SE OF FRONT WINDS 
25 TO 35 KT. SEAS 9 TO 18 FT. 
.24 HOUR FORECAST LOW 47N166W 996 MB. FRONT WILL EXTEND FROM 
CENTER TO 34N169W. WITHIN 180 NM E QUADRANT AND 300 NM E OF 
FRONT WINDS 30 TO 45 KT. SEAS 12 TO 21 FT. ELSEWHERE WITHIN 420 
NM E AND 180 NM W OF FRONT WINDS 20 TO 30 KT. SEAS 9 TO 15 FT. 
.48 HOUR FORECAST LOW 60N155W 981 MB. WITHIN 420 NM S 
SEMICIRCLE...AND N OF 58N BETWEEN 141W AND 154W WINDS 30 TO 45 
KT. SEAS 10 TO 21 FT. ELSEWHERE N OF 54N BETWEEN 157W AND 
170W...AND N OF 50N BETWEEN 175W AND 180W WINDS 25 TO 35 KT. 
SEAS 9 TO 14 FT. ALSO WITHIN 240 NM E OF A LINE FROM 53N150W TO 
43N154W WINDS 20 TO 30 KT. SEAS TO 12 FT. 

...GALE WARNING... 
.48 HOUR FORECAST FROM 37N TO 41N BETWEEN 161E AND 167E...ALSO 
WITHIN 120 NM NE OF A LINE FROM 45N162E TO 41N154E...AND N OF 
45N W OF 164E WINDS 25 TO 35 KT. SEAS 8 TO 15 FT. 

.SYNOPSIS AND FORECAST. 

.LIGHT TO MODERATE FREEZING SPRAY N OF 58N W OF 175W. 
.24 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY N OF 58N W OF 
170W. 
.48 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY N OF A LINE 
FROM 58N177E TO 56N174W TO 57N165W. 

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 46N TO 59N 
BETWEEN 156W AND 177W. 
.24 HOUR FORECAST DENSE FOG FROM 46N TO 54N BETWEEN 147W AND 
168W...ALSO N OF 58N BETWEEN 171W AND 178E...AND N OF 55N 
BETWEEN 142W AND 150W. 
.48 HOUR FORECAST DENSE FOG N OF 56N BETWEEN 168W AND 175W. 

.FORECASTER SHAW. 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 0000 UTC FRI MAR 29.
24 HOUR FORECAST VALID 0000 UTC SAT MAR 30.
48 HOUR FORECAST VALID 0000 UTC SUN MAR 31.

.WARNINGS.

...GALE WARNING...
.WITHIN 16N94W TO 16N95W TO 15N96W TO 14N96W TO 14N95W TO 15N94W
TO 16N94W...INCLUDING THE GULF OF TEHUANTEPEC...N WINDS 30 TO 45
KT. SEAS 10 TO 14 FT. ELSEWHERE WITHIN 15N94W TO 16N94W TO 
16N96W TO 14N97W TO 12N97W TO 12N95W TO 15N94W N TO NE WINDS 20 
TO 30 KT. SEAS 8 TO 12 FT.
.18 HOUR FORECAST WITHIN 16N94W TO 16N95W TO 16N96W TO 14N96W TO
14N95W TO 16N94W...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE 
WINDS 20 TO 30 KT. SEAS 8 TO 11 FT. ELSEWHERE WITHIN 15N94W TO 
11N101W TO 10N100W TO 10N96W TO 11N94W TO 15N94W WINDS 20 KT OR 
LESS. SEAS 8 TO 11 FT IN N TO NE SWELL.
.24 HOUR FORECAST WITHIN 12N95W TO 13N97W TO 11N101W TO 10N101W 
TO 09N98W TO 11N95W TO 12N95W WINDS 20 KT OR LESS. SEAS 8 TO 9 
FT IN N TO NE SWELL.
.42 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS 
LESS THAN 8 FT.

.SYNOPSIS AND FORECAST.

.DISSIPATING COLD FRONT FROM 30N128W TO 25N140W. WITHIN 30N130W 
TO 30N137W TO 29N133W TO 29N131W TO 30N130W WINDS 20 KT OR LESS. 
SEAS 8 TO 9 FT IN NW TO N SWELL.
.24 HOUR FORECAST OLD COLD FRONT DISSIPATED. NEW COLD FRONT FROM
30N127W TO 28N140W. WITHIN 30N125W TO 30N135W TO 29N134W TO 
29N130W TO 29N127W TO 30N125W W TO NW WINDS 20 TO 25 KT. SEAS 10
TO 12 FT IN NW SWELL. ELSEWHERE WITHIN 30N117W TO 29N128W TO 
30N140W TO 28N138W TO 25N126W TO 27N121W TO 30N117W WINDS 20 KT
OR LESS. SEAS 8 TO 10 FT IN NW SWELL.
.48 HOUR FORECAST COLD FRONT FROM 30N117W TO 22N130W TO
22.5N140W. WITHIN 30N121W TO 30N136W TO 27N132W TO 27N126W TO 
29N121W TO 30N121W NW WINDS 20 TO 25 KT. SEAS 12 TO 16 FT IN NW 
TO N SWELL. ELSEWHERE WITHIN 30N117W TO 27N129W TO 30N140W TO 
24N140W TO 23N127W TO 25N122W TO 30N117W WINDS 20 KT OR LESS.
SEAS 8 TO 12 FT IN NW TO N SWELL.

.WITHIN 11N131W TO 19N140W TO 04N140W TO 06N135W TO 06N120W TO
07N117W TO 11N131W WINDS 20 KT OR LESS. SEAS 8 FT IN N SWELL.
.24 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS 
LESS THAN 8 FT.

.12 HOUR FORECAST WITHIN 12N86W TO 12N87W TO 11N88W TO 10N88W TO
10N87W TO 11N86W TO 12N86W...INCLUDING THE GULF OF PAPAGAYO...
NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS 
LESS THAN 8 FT.

.24 HOUR FORECAST WITHIN 08N78W TO 09N79W TO 06N81W TO 06N80W TO
06N78W TO 08N78W...INCLUDING THE GULF OF PANAMA AND NEAR THE
AZUERO PENINSULA...N TO NE WINDS 20 TO 25 KT. SEAS LESS THAN 8 
FT.
.48 HOUR FORECAST WITHIN 09N78.5W TO 08.5N79.5W TO 07N79.5W TO 
06.5N79W TO 07N78.5W TO 09N78.5W...INCLUDING THE GULF OF 
PANAMA...N WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.

.24 HOUR FORECAST WITHIN 31N113W TO 31N114W TO 30N115W TO
30N114W TO 31N113W...INCLUDING THE GULF OF CALIFORNIA...S TO SW 
WINDS 20 TO 30 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 0200 UTC FRI MAR 29...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
EQUATORIAL TROUGH FROM NORTHERN COLOMBIA TO 05N85W TO 03N104W. 
ITCZ RUNS WESTWARD FROM 03N104W TO THE EQUATOR NEAR 137W. 
SCATTERED MODERATE ISOLATED STRONG FROM EQUATOR TO 07N BETWEEN 
90W AND 122W. SCATTERED MODERATE FROM 02N TO 09N BETWEEN 131W AND
140W.

$$
.FORECASTER LEWITSKY. NATIONAL HURRICANE CENTER.