HSFEPI
HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0545 UTC THU APR 17 2025
CCODE/1:31:12:01:00/AOW+POR/NWS/CCODE
SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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
VOSOPS@NOAA.GOV(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 APR 17.
24 HOUR FORECAST VALID 0000 UTC APR 18.
48 HOUR FORECAST VALID 0000 UTC APR 19.
.WARNINGS.
...STORM WARNING...
.LOW 57N162W 980 MB MOVING NE 10 KT. WITHIN 120 NM N OF A FRONT
EXTENDING FROM 59N142W TO 58N152W WINDS 35 TO 50 KT. SEAS 11 TO
22 FT. ELSEWHERE WITHIN 720 NM E AND NE...AND S AND SW...1080 NM
SE...AND 420 NM NW QUADRANTS WINDS 25 TO 40 KT. SEAS 10 TO 20 FT.
.24 HOUR FORECAST COMPLEX LOW WITH FIRST CENTER 59N157W 995 MB
AND A SECOND NEW CENTER 63N164W 994 MB. E OF A FRONT EXTENDING
FROM 56N137W TO 60N144W...AND WITHIN 540 NM SE AND 360 NM SW
QUADRANTS OF FIRST CENTER WINDS 25 TO 35 KT. SEAS 9 TO 18 FT.
ELSEWHERE FROM 46N TO 61N BETWEEN 133W AND 168W WINDS TO 25 KT.
SEAS 8 TO 15 FT.
.48 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 59N146W 1008 MB.
WITHIN 960 NM SE...AND 840 NM W AND SW QUADRANTS WINDS 20 TO 30
KT. SEAS 8 TO 15 FT.
...GALE WARNING...
.FROM 40N TO 43N E OF 127W N WINDS 25 TO 40 KT. SEAS 9 TO 16 FT.
ELSEWHERE FROM 35N TO 52N BETWEEN 124W AND 132W N WINDS 20 TO 30
KT. SEAS 8 TO 14 FT.
.24 HOUR FORECAST FROM 35N TO 50N BETWEEN 124W AND 132W N WINDS
20 TO 30 KT. SEAS TO 12 FT.
.48 HOUR FORECAST FROM 34N TO 52N BETWEEN 124W AND 136W N WINDS
20 TO 30 KT. SEAS TO 9 FT.
...GALE WARNING...
.COMPLEX LOW W OF AREA WITH MAIN CENTER 47N152E 982 MB MOVING NE
15 KT AND SECONDARY CENTER 52N162E 994 MB MOVING NE 15 KT.
WITHIN 300 NM NE...AND 840 NM S AND SE QUADRANTS OF SECONDARY
CENTER WINDS 25 TO 40 KT. SEAS 9 TO 16 FT. ELSEWHERE FROM 34N TO
54N W OF 176E WINDS 20 TO 30 KT. SEAS 8 TO 14 FT.
.24 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 48N162E 994 MB
AND A SECONDARY CENTER 56N170E 996 MB. BETWEEN 90 NM AND 600 NM
S AND SW QUADRANTS OF MAIN CENTER...AND BETWEEN 240 NM AND 1080
NM S AND SE QUADRANTS OF SECONDARY CENTER WINDS 25 TO 40 KT.
SEAS 9 TO 18 FT. ELSEWHERE FROM 35N TO 54N W OF 169W WINDS 20 TO
30 KT. SEAS 8 TO 16 FT.
.48 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 47N176E 1000 MB.
WITHIN 660 NM E AND NE...540 NM SE...AND 360 NM SW QUADRANTS
WINDS 25 TO 35 KT. SEAS 9 TO 15 FT. ELSEWHERE FROM 35N TO 49N
BETWEEN 165W AND 164E WINDS 20 TO 30 KT. SEAS 8 TO 13 FT.
.SYNOPSIS AND FORECAST.
.EXCEPT AS NOTED IN WARNINGS SECTION ABOVE FROM 30N TO 34N
BETWEEN 150W AND 174W WINDS TO 25 KT. SEAS 8 TO 14 FT.
.24 HOUR FORECAST WITHIN AN AREA BOUNDED BY 30N156W TO 40N145W
TO 30N172W TO 30N156W NE WINDS 20 TO 30 KT. SEAS TO 12 FT.
.48 HOUR FORECAST FROM 30N TO 38N BETWEEN 149W AND 171W E TO NE
WINDS TO 25 KT. SEAS TO 11 FT.
.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 53N TO 62N
BETWEEN 138W AND 170W...AND FROM 41N TO 52N BETWEEN 170E AND
162E.
.24 HOUR FORECAST DENSE FOG FROM 55N TO 62N BETWEEN 136W AND
167W...WITHIN 120 NM E OF A LINE FROM 42N174E TO 52N179W...FROM
54N TO 56N W OF 180W...AND FROM 44N TO 50N W OF 165E.
.48 HOUR FORECAST DENSE FOG FROM 56N TO 60N E OF 140W...AND FROM
45N TO 51N BETWEEN 166W AND 176W.
.LIGHT TO MODERATE FREEZING SPRAY N AND NE OF A LINE FROM
56N166W TO 57N170W TO 60N178W.
.24 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY N OF 57N W OF
161W.
.48 HOUR FORECAST LIGHT FREEZING SPRAY N OF 58N W OF 162W.
.FORECASTER MILLS. 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 THU APR 17.
24 HOUR FORECAST VALID 0000 UTC FRI APR 18.
48 HOUR FORECAST VALID 0000 UTC SAT APR 19.
.WARNINGS.
...GULF OF CALIFORNIA GALE WARNING...
.WITHIN 31N113.5W TO 31N114W TO 30.5N114.5W TO 30N114.5W TO
30N114W TO 30.5N113.5W TO 31N113.5W SW WINDS 20 TO 30 KT AND
GUSTY. SEAS LESS THAN 8 FT.
.03 HOUR FORECAST WITHIN 31N113W TO 31N114W TO 30N115W TO
30N114W TO 30N113W TO 31N113W SW WINDS 25 TO 35 KT AND GUSTY.
SEAS LESS THAN 8 FT.
.06 HOUR FORECAST LITTLE CHANGE EXCEPT SEAS TO 9 FT.
.09 HOUR FORECAST WITHIN 31N113W TO 31N114W TO 30N115W TO
30N114W TO 30N113W TO 31N113W SW WINDS 20 TO 25 KT. SEAS TO 8 FT.
.18 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 8 FT.
.24 HOUR FORECAST LITTLE CHANGE.
.27 HOUR FORECAST FROM 30N TO 31N SW WINDS 20 TO 25 KT AND
GUSTY. SEAS LESS THAN 8 FT.
.42 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 8 FT.
.SYNOPSIS AND FORECAST.
.WITHIN 16N95W TO 15N96W TO 15N95W TO 15N94W TO
16N95W...INCLUDING
THE GULF OF TEHUANTEPEC... N WINDS 20 TO 30 KT. SEAS TO 9 FT.
WITHIN 15N95W TO 15N96W TO 12N99W TO 11N99W TO 10N97W TO 12N94W
TO 15N95W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN N TO NE SWELL.
.21 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 8 FT.
.WITHIN 15N133W TO 15N134W TO 14N135W TO 13N135W TO 14N134W TO
15N133W WINDS 20 KT OR LESS. SEAS 8 FT IN N TO NE SWELL. WITHIN
10N118W TO 10N121W TO 09N122W TO 08N121W TO 08N120W TO 10N118W
WINDS 20 KT OR LESS. SEAS 8 FT IN MIXED N AND E SWELL.
.24 HOUR FORECAST WITHIN 16N136W TO 16N137W TO 12N140W TO
10N140W TO 11N139W TO 16N136W WINDS 20 KT OR LESS. SEAS 8 FT IN N
TO NE SWELL. WITHIN 09N125W TO 10N127W TO 09N130W TO 07N127W TO
07N125W TO 08N123W TO 09N125W WINDS 20 KT OR LESS. SEAS 8 FT IN
MIXED N AND E SWELL.
.48 HOUR FORECAST WITHIN 11N138W TO 12N139W TO 12N140W TO
08N140W TO 09N139W TO 10N138W TO 11N138W WINDS 20 KT OR LESS.
SEAS 8 FT IN MIXED N AND E SWELL.
.WITHIN 03.5S104W TO 03.5S104.5W TO 03.4S104.5W TO 03.4S104W TO
03.5S104W WINDS 20 KT OR LESS. SEAS 8 FT IN SE TO S SWELL.
.24 HOUR FORECAST WITHIN 02S110W TO 02S114W TO 03S117W TO
03.4S118W TO 03.4S110W TO 02S110W WINDS 20 KT OR LESS. SEAS 8 FT
IN SE SWELL.
.48 HOUR FORECAST WITHIN 03S117W TO 02S118W TO 02S119W TO
03S120W TO 03.4S120W TO 03.4S117W TO 03S117W WINDS 20 KT OR LESS.
SEAS 8 FT IN SE SWELL.
.03 HOUR FORECAST WITHIN 30N130W TO 30N134.5W TO 30N134W TO
30N132W TO 30N130.5W TO 30N130W WINDS 20 KT OR LESS. SEAS 8 FT
IN NE SWELL.
.24 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 8 FT.
.FROM 10.5N TO 11.5N E OF 87.5W...INCLUDING THE GULF OF
PAPAGAYO...
E WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST WITHIN 11N87W TO 12N87W TO 12N88W TO 11N88W TO
11N87W TO 11N86W TO 11N87W...INCLUDING THE GULF OF PAPAGAYO... E
WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST WITHIN 11N86W TO 11.5N87.5W TO 10.5N88W TO
10.5N87.5W TO 10.5N86W TO 11N86W...INCLUDING THE GULF OF
PAPAGAYO... NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
CONVECTION VALID AT 0220 UTC THU APR 17...
.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
SURFACE TROUGH FROM 10N74W TO 07.5N79W TO 08.5N84W TO 05.5N96W.
ITCZ FROM 05.5N96W TO 05N117W TO 04N140W. A SOUTHERN HEMISPHERIC
ITCZ IS ANALYZED FROM 02.5S109W TO BEYOND 05.5S120W. SCATTERED
TO LOCALLY NUMEROUS MODERATE TO STRONG CONVECTION FROM 00N TO
07N E OF 86W. SCATTERED MODERATE ISOLATED STRONG CONVECTION
FROM 03N TO 07N BETWEEN 86W AND 102W AND FROM 02.5N TO 07.5N
BETWEEN 107W AND 117W.
$$
.FORECASTER STRIPLING. NATIONAL HURRICANE CENTER.
NATIONAL WEATHER SERVICE HONOLULU HI
NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 160E
SYNOPSIS VALID 0000 UTC APR 17 2025.
24 HOUR FORECAST VALID 0000 UTC APR 18 2025.
48 HOUR FORECAST VALID 0000 UTC APR 19 2025.
.WARNINGS.
.NONE.
.SYNOPSIS AND FORECAST.
.FRONT 30N156W 23N165W 21N172W 21N176E MOVING E SLOWLY THEN
BECOMING NEARLY STATIONARY. ISOLATED MODERATE TSTMS WITHIN 150 NM
E OF FRONT N OF 22N.
.24 HOUR FORECAST FRONT WEAKENED TO TROUGH 30N156W 24N163W
18N166W.
.48 HOUR FORECAST TROUGH 27N165W 21N170W.
.24 HOUR FORECAST NEW TROUGH 26N165E 20N162E.
.48 HOUR FORECAST TROUGH MOVED W OF AREA.
.N TO NE WINDS 20 TO 25 KT N OF LINE 28N150W 21N170W 20N180W
21N170E...AND FROM 02N TO 15N W OF 170E.
.24 HOUR FORECAST NE TO E 20 TO 30 KT N OF A LINE 30N156W 25N160W
18N170W 16N170E 19N165E.
.48 HOUR FORECAST WINDS 20 TO 25 KT N OF LINE 25N150W 25N170W
18N180W. NE WINDS 20 TO 25 KT FROM 06N TO 17N E OF 150W.
.SEAS 12 TO 14 FT N OF 28N N OF LINE 30N163W 26N170W 26N172W.
SEAS 8 TO 12 FT ELSEWHERE N OF LINE 30N158W 23N166W 20N176W
22N168E.
.24 HOUR FORECAST SEAS 12 TO 14 FT FROM 22N TO 28N BETWEEN 162W
AND 167W. SEAS 8 TO 12 FT N OF LINE 30N150W 23N157W 17N171W
16N176E 21N167E.
.48 HOUR FORECAST SEAS 8 TO 11 FT N OF LINE 30N156W 16N173W
15N170E 19N163E.
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS 8 FT OR LESS.
$$
.FORECASTER ALMANZA. HONOLULU HI.=