506
FZPN02 KWBC 212325
HSFEPI

HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2345 UTC WED MAY 21 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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).

MARINERS SHOULD NOTE THAT FORECASTS FOR SEAS ARE IN UNITS OF
METERS.

FOR ANY TROPICAL CYCLONE INFORMATION BEYOND 48 HOURS REFERENCE
THE ASSOCIATED NWS TROPICAL CYCLONE FORECAST/ADVISORY (TCM).

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 MAY 21.
24 HOUR FORECAST VALID 1800 UTC MAY 22.
48 HOUR FORECAST VALID 1800 UTC MAY 23.

.WARNINGS.

...STORM WARNING...
.24 HOUR FORECAST LOW W OF AREA NEAR 45N155E 990 MB. BETWEEN 50N
AND A LINE FROM 37N160E TO 43N168E WINDS 25 TO 40 KT. SEAS TO 3.5
M.
.48 HOUR FORECAST LOW 52N165E 983 MB. WITHIN 240 NM S SEMICIRCLE
WINDS 40 TO 50 KT. SEAS 4 TO 8 M. ELSEWHERE N OF 44N W OF 179W
WINDS 25 TO 40 KT. SEAS 2.5 TO 5 M. ALSO FROM 40N TO 44N W OF
178W WINDS TO 25 KT. SEAS TO 3.5 M.

...GALE WARNING...
.LOW 56N159W 994 MB MOVING SE 15 KT. N OF 42N BETWEEN 147W AND
172W WINDS 25 TO 40 KT. SEAS 2.5 TO 4.5 M. ELSEWHERE FROM 42N TO
54N BETWEEN 172W AND 177W WINDS LESS THAN 25 KT. SEAS TO 3.5 M.
.24 HOUR FORECAST LOW 54N149W 1003 MB. FROM 47N TO 60N BETWEEN
138W AND 159W WINDS 20 TO 30 KT. SEAS 2.5 TO 4.5 M.
.48 HOUR FORECAST LOW 53N147W 997 MB. WITHIN 660 NM N SEMICIRCLE
WINDS 20 TO 30 KT. SEAS TO 3 M.

...GALE WARNING...
.COMPLEX LOW WITH FIRST CENTER 52N172E 999 MB MOVING NE 20 KT AND
SECOND CENTER 53N168E 1002 MB MOVING SE 05 KT. N OF 39N BETWEEN
176W AND 163E WINDS 25 TO 35 KT. SEAS 2.5 TO 4.5 M.
.24 HOUR FORECAST COMBINED LOW 54N177W 1003 MB. WITHIN 780 NM SE
AND 480 NM SW QUADRANTS WINDS 25 TO 35 KT. SEAS 2.5 TO 4.5 M.
ELSEWHERE FROM 42N TO 59N BETWEEN 158W AND 172E...NOT INCLUDING
THE WATERS E OF 169W WITHIN THE BERING SEA...WINDS 20 TO 30 KT.
SEAS TO 3.5 M.
.48 HOUR FORECAST LOW 51N143W 996 MB. WITHIN 540 NM E...660 NM
S...AND 1080 NM W QUADRANTS WINDS 25 TO 35 KT. SEAS 2.5 TO 4.5 M.
ELSEWHERE FROM 40N TO 50N BETWEEN 132W AND 168W WINDS 20 TO 30
KT. SEAS TO 3 M.

.SYNOPSIS AND FORECAST.

.LOW 44N137W 1015 MB MOVING SE 20 KT. FROM 37N TO 46N BETWEEN
132W AND 145W WINDS 20 TO 30 KT. SEAS TO 4 M.
.24 HOUR FORECAST LOW 40N128W 1018 MB. WITHIN 480 NM W QUADRANT
WINDS LESS THAN 25 KT. SEAS TO 2.5 M.
.48 HOUR FORECAST LOW DISSIPATED AND ASSOCIATED CONDITIONS
DIMINISHED.

.FROM 30N TO 43N BETWEEN 120W AND 128W WINDS TO 25 KT. SEAS 2.5
TO 4 M.
.24 HOUR FORECAST FROM 30N TO 38N BETWEEN 120W AND 125W WINDS TO
25 KT. SEAS TO 3.5 M.
.48 HOUR FORECAST FROM 30N TO 41N E OF 126W WINDS 20 TO 30 KT.
SEAS TO 3 M.

.LOW WELL S OF AREA. S OF 36N BETWEEN 172W AND 165E WINDS 20 TO
30 KT. SEAS TO 2.5 M.
.24 HOUR FORECAST S OF 36N BETWEEN 162W AND 164E WINDS 20 TO 30
KT. SEAS TO 3.5 M.
.48 HOUR FORECAST S OF 40N BETWEEN 180W AND 167E WINDS TO 25 KT.
SEAS TO 3 M.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 55N TO 59N
BETWEEN 162W AND 165W AND WITHIN THE AREA BOUNDED BY 38N164E TO
47N175W TO 54N170E TO 38N164E.
.24 HOUR FORECAST DENSE FOG FROM 45N TO 48N BETWEEN 159W AND
163W...FROM 53N TO 57N BETWEEN 165W AND 176E...FROM 40N TO 49N W
OF 168E...AND WITHIN 180 NM NW OF A LINE FROM 39N176E TO
45N171W.
.48 HOUR FORECAST DENSE FOG FROM 39N TO 57N BETWEEN 174W AND
165E.

.LIGHT FREEZING SPRAY N OF 58N BETWEEN 168W AND 179W.
.24 HOUR FORECAST LIGHT FREEZING SPRAY N OF 59N BETWEEN 168W AND
174W.
.48 HOUR FORECAST LIGHT FREEZING SPRAY N OF 59N BETWEEN 170W AND
174W.

.FORECASTER JOSEPH. OCEAN PREDICTION CENTER.

NWS 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 WED MAY 21.
24 HOUR FORECAST VALID 1800 UTC THU MAY 22.
48 HOUR FORECAST VALID 1800 UTC FRI MAY 23.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.N OF 26N BETWEEN 119W AND 132W WINDS 20 KT OR LESS. SEAS 2.5 TO
3 M IN N TO NE SWELL.
.24 HOUR FORECAST N OF 27N BETWEEN 118W AND 125W WINDS 20 KT OR
LESS. SEAS 2.5 TO 3.0 M IN NW SWELL.
.48 HOUR FORECAST N OF 29N BETWEEN 118W AND 123W WINDS 20 KT OR
LESS. SEAS 2.5 TO 3.0 M IN NW SWELL.

.FROM 08N TO 14N W OF 126W NE TO E WINDS 20 TO 25 KT. SEAS 2.5
TO 3.0 M PRIMARILY IN NE SWELL.
.24 HOUR FORECAST FROM 07N TO 11N W OF 124W WINDS 20 KT OR LESS.
SEAS 2.5 M PRIMARILY IN NE SWELL.
.48 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.

.S OF A LINE FROM 03.4S94W TO 04N110W TO 00N120W WINDS 20 KT OR
LESS. SEAS 2.5 TO 3 M IN S TO SW SWELL.
.24 HOUR FORECAST S OF A LINE FROM 03.4S98W TO 01N104W TO
01N113W TO 00N120W WINDS 20 KT OR LESS. SEAS 2.5 TO 3 M IN S TO
SW SWELL.
.48 HOUR FORECAST S OF A LINE FROM 03.4S96W TO 01S115W TO
02SN120W WINDS 20 KT OR LESS. SEAS 2.5 M IN S TO SW SWELL.

.30 HOUR FORECAST FROM 10.5N TO 11.5N E OF 88W...INCLUDING THE
GULF OF PAPAGAYO...NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 2.5
M.
.36 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.

.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.

CONVECTION VALID AT 2100 UTC WED MAY 21...

TROPICAL WAVE ALONG 107W FROM 04N TO 16N. SCATTERED MODERATE TO
ISOLATED STRONG CONVECTION IS FROM 10N TO 15N BETWEEN 100W AND
108W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
THE MONSOON TROUGH ENTERS THE EASTERN PACIFIC NEAR 10N86W AND
EXTENDS WESTWARD TO 12N100W TO 07N114W. THE ITCZ CONTINUES FROM
07N114W TO BEYOND 06N140W. SCATTERED MODERATE TO ISOLATED STRONG
CONVECTION IS NOTED FROM 06N TO 10N BETWEEN 83W AND 90W...AND
FROM 05N TO 11N BETWEEN 95W AND 135W. CLUSTERS OF MODERATE TO
STRONG CONVECTION ARE N OF THE ITCZ TO 09N AND W OF 135W.

.FORECASTER GR. NATIONAL HURRICANE CENTER.

NATIONAL WEATHER SERVICE HONOLULU HI

NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 160E

SYNOPSIS VALID 1800 UTC MAY 21 2025.
24 HOUR FORECAST VALID 1800 UTC MAY 22 2025.
48 HOUR FORECAST VALID 1800 UTC MAY 23 2025.

.WARNINGS.


.NONE.

.SYNOPSIS AND FORECAST.

.LOW 24N171E 1007 MB. TROUGH 14N169E 20N176E 22N177E 24N178E
26N178E 28N177E. SECOND TROUGH 30N172E 27N171E TO LOW.  LOW AND
TROUGHS MOVING W SLOWLY. SE WINDS 20 TO 30 KT N OF A LINE 21N168W
22N169E 30N173E. SCATTERED MODERATE TO STRONG TSTMS WITHIN 270 NM
E OF TROUGH N OF 16N. ISOLATED MODERATE TSTMS WITHIN 90 NM W OF
TROUGH N OF 20N.
.24 HOUR FORECAST LOW NEAR 22N169E 1009 MB. TROUGH 30N170E TO LOW
TO 17N165E. SE WINDS 20 TO 30 KT N OF A LINE 30N171E 22N180E
22N172W.
.48 HOUR FORECAST LOW WEAKENED TO TROUGH 30N166E 22N165E
18N162E. SE WINDS 20 TO 25 KT N OF A LINE 30N173E 26N178E 26N178W.


.24 HOUR FORECAST E WINDS 20 TO 25 KT N OF 21N BETWEEN 160W AND
176W.
.48 HOUR FORECAST WINDS DECREASED TO 20 KT OR LESS.

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

.SEAS 2.5 TO 3 M N OF 23N BETWEEN 174W AND 176E...AND N OF 24N
BETWEEN 172E AND 167E.
.24 HOUR FORECAST SEAS 2.5 TO 4 M N OF A LINE 21N173W 23N177E
30N170E.
.48 HOUR FORECAST SEAS 2.5 TO 3 M N OF 27N BETWEEN 178W AND 174E.

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

.ITCZ 06N140W 05N145W 05N150W 06N160W 05N167W. SCATTERED MODERATE
TO STRONG TSTMS WITHIN 210 NM N OF ITCZ E OF 153W. ISOLATED
MODERATE TSTMS ELSEWHERE WITHIN 210 NM OF ITCZ W OF 153W.


.ISOLATED MODERATE TSTMS S OF 10N W OF 175E.



$$

.FORECASTER TSAMOUS. HONOLULU HI.