East and Central North Pacific High Seas Forecast

FZPN02 KWBC 120525
HSFEPI

HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0545 UTC THU MAR 12 2026

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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 S OF 67N AND N OF 30N E OF A LINE FROM THE BERING STRAIT
TO 53N172E TO 50N180W TO 30N180W

ALL FORECASTS VALID OVER ICE FREE FORECAST WATERS

SYNOPSIS VALID 0000 UTC MAR 12. 
24 HOUR FORECAST VALID 0000 UTC MAR 13.
48 HOUR FORECAST VALID 0000 UTC MAR 14.

.WARNINGS.

...STORM WARNING...
.COMPLEX LOW WITH FIRST CENTER 36N176W 991 MB MOVING SW 15 KT AND
SECOND CENTER 33N178W 993 MB MOVING E 10 KT. FROM 37N TO 43N W OF
161W WINDS 40 TO 55 KT. SEAS 6 TO 11 M. ALSO S OF 50N W OF
150W...EXCEPT S OF 38N BETWEEN 160W AND 178W...WINDS 25 TO 40 KT.
SEAS 3 TO 7 M. ELSEWHERE S OF 38N BETWEEN 160W AND 178W WINDS TO
25 KT. SEAS 2.5 TO 6 M.
.24 HOUR FORECAST COMPLEX LOW WITH FIRST CENTER JUST W OF AREA
32N179E 998 MB AND SECOND CENTER 33N174W 997 MB. FROM 37N TO 42N
W OF 164W WINDS 35 TO 45 KT. SEAS 6 TO 9.5 M. ALSO S OF 47N W OF
175W...AND FROM 35N TO 47N W OF 144W WINDS 25 TO 35 KT. SEAS 2.5
TO 6.5 M. ELSEWHERE S OF 48N W OF 175W WINDS TO 25 KT. SEAS 2.5
TO 6 M...HIGHEST N AND W OF SECOND CENTER.
.48 HOUR FORECAST COMPLEX LOW WITH MEAN CENTER NEAR 33N168W 996
MB. BETWEEN 120 NM AND 720 NM N AND NW SEMICIRCLES WINDS 25 TO 40
KT. SEAS 3 TO 7.5 M. ELSEWHERE S OF 47N W OF 152W WINDS TO 25 KT.
SEAS 2.5 TO 6 M... HIGHEST NW OF MEAN CENTER.

...GALE WARNING...
.LOW 51N128W 1004 MB MOVING NE 15 KT THEN DISSIPATING INLAND.
WITHIN 540 NM S AND 480 NM SW QUADRANTS WINDS 25 TO 40 KT. SEAS
2.5 TO 4.5 M. 
.24 HOUR FORECAST LOW CONDITIONS DESCRIBED WITH GALE WARNING
BELOW.

...GALE WARNING...
.COMPLEX LOW WITH FIRST CENTER 57N146W 1006 MB MOVING SE 15 KT
AND SECOND CENTER 53N141W 1000 MB MOVING SE 15 KT. WITHIN 420 NM
SW QUADRANT OF FIRST CENTER...WITHIN 420 NM SE AND 300 NM SW
QUADRANTS OF SECOND CENTER...AND S OF ALASKA N OF 46N BETWEEN
151W AND 164W WINDS 25 TO 40 KT. SEAS 2.5 TO 4.5 M IN MIXED
SWELL.
.24 HOUR FORECAST COMPLEX LOW WITH FIRST CENTER 55N137W 1014 MB
AND SECOND CENTER 52N132W 1016 MB. WITHIN 180 NM S QUADRANT OF
FIRST CENTER AND WITHIN 240 NM S QUADRANT OF SECOND CENTER WINDS
20 TO 30 KT. SEAS 2.5 TO 4.5 M...HIGHEST S OF SECOND CENTER.
.48 HOUR FORECAST COMPLEX LOW COMPLEX LOW DISSIPATED INLAND AND
ASSOCIATED CONDITIONS DIMINISHED.

...HEAVY FREEZING SPRAY WARNING...
.MODERATE TO HEAVY FREEZING SPRAY N OF 55N BETWEEN 152W AND 164W.
ELSEWHERE LIGHT TO MODERATE FREEZING SPRAY N OF 50N BETWEEN 149W
AND 169W...AND WITHIN 120 NM OF S ALASKAN COAST BETWEEN 134W AND
149W.
.24 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY WITHIN 240 NM
OF S ALASKAN COAST BETWEEN 134W AND 159W...AND N OF 57N W OF
175W.
.48 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY WITHIN 120 NM
OF S ALASKAN COAST BETWEEN 134W AND 163W...AND N OF A LINE FROM
53N166W TO 56N175W TO 59N180W.

.SYNOPSIS AND FORECAST.

.SHISHALDIN VOLCANO AT POSITION 54.8N164W NEAR THE CENTER OF
UNIMAK ISLAND. STRONG NORTHERLY WINDS IN THE VICINITY OF
SHISHALDIN VOLCANO HAVE PICKED UP LOOSE VOLCANIC ASH AND DUST ON
THE SURFACE AND ARE CARRYING IT SOUTH OVER THE COASTAL WATERS
SOUTH OF UNIMAK ISLAND. TRACE AMOUNTS OF ASHFALL ARE POSSIBLE FOR
ANY MARINE VESSELS TRANSITING THE AREA. 

.ERUPTIVE ACTIVITY HAS BEEN DETECTED AT THE SHEVELUCH VOLCANO
WHICH IS LOCATED NEAR 56.4N 161.2E. TRACE AMOUNTS OF ASHFALL ARE
POSSIBLE OVER THE MARINE AREAS IN THE BERING SEA DOWNWIND.
MARINERS TRAVELING IN THE VICINITY OF THE BERING SEA NEAR 58.0N
180.0W ARE URGED TO EXERCISE CAUTION. PLEASE REPORT ANY
OBSERVATIONS OF VOLCANIC ASH OR FLOATING VOLCANIC DEBRIS TO THE
OCEAN PREDICTION CENTER BY CALLING 301 683 1520.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 50N TO 59N E OF
152W...AND FROM 35N TO 45N BETWEEN 146W AND 162W.
.24 HOUR FORECAST DENSE FOG NE OF A LINE FROM 55N136W TO
59N147W...N OF 54N BETWEEN 165W AND 174W...AND WITHIN 240 NM
EITHER SIDE OF A LINE FROM 37N165W TO 47N124W.
.48 HOUR FORECAST DENSE FOG FROM 49N TO 52N BETWEEN 154W AND
162W...FROM 33N TO 41N BETWEEN 151W AND 166W...AND WITHIN 120 NM
EITHER SIDE OF A LINE FROM 40N150W TO 44N124W.

.FORECASTER ANDERSON. 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 0000 UTC THU MAR 12.
24 HOUR FORECAST VALID 0000 UTC FRI MAR 13.
48 HOUR FORECAST VALID 0000 UTC SAT MAR 14.

.WARNINGS.

...GALE WARNING...
.15 HOUR FORECAST WITHIN 16N94W TO 16N95W TO 16N96W TO 15N95W TO
15N94W TO 16N94W...INCLUDING THE GULF OF TEHUANTEPEC...N WINDS 
20 TO 30 KT. SEAS LESS THAN 2.5 M. 
.18 HOUR FORECAST WITHIN 16N94W TO 16N95W TO 15N96W TO 14N96W 
TO 14N94W TO 16N94W...INCLUDING THE GULF OF TEHUANTEPEC...N 
WINDS 30 TO 40 KT. SEAS LESS 2.5 M TO 3.5 M. 
.24 HOUR FORECAST WITHIN 16N93W TO 16N95W TO 16N96W TO 13N97W 
TO 13N95W TO 14N93W TO 16N93W...INCLUDING THE GULF OF 
TEHUANTEPEC...N WINDS 35 TO 45 KT. SEAS 2.5 TO 4.0 M. 
.42 HOUR FORECAST WITHIN 14N92W TO 16N94W TO 13N99W TO 09N100W 
TO 10N93W TO 14N92W...INCLUDING THE GULF OF TEHUANTEPEC...NE 
WINDS 20 TO 30 KT. SEAS 2.5 TO 4.5 M. 
.48 HOUR FORECAST WITHIN 16N94W TO 16N95W TO 15N95W TO 
16N94W...INCLUDING THE GULF OF TEHUANTEPEC...N WINDS 20 TO 30 
KT. SEAS 2.5 M TO 3.5 M. WITHIN 15N96W TO 13N100W TO 09N101W TO 
08N95W TO 10N91W TO 15N96W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M
IN N TO NE SWELL.

.SYNOPSIS AND FORECAST.

.WITHIN 15N113W TO 17N129W TO 21N140W TO 05N140W TO 09N112W TO
15N113W NE TO E WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0 M.
.24 HOUR FORECAST WITHIN 21N128W TO 18N140W TO 03N140W TO
07N130W TO 08N119W TO 21N128W WINDS 20 KT OR LESS. SEAS 2.5 TO
3.0 M IN NE TO E SWELL.
.48 HOUR FORECAST WITHIN 10N127W TO 13N134W TO 13N140W TO
06N140W TO 05N130W TO 06N127W TO 10N127W WINDS 20 KT OR LESS.
SEAS 2.5 TO 3.0 M IN NE TO E SWELL.

.WITHIN 30N113W TO 28N113W TO 25N110W TO 23N109W TO 25N108W TO
26N109W TO 30N113W...INCLUDING THE GULF OF CALIFORNIA...NW WINDS
20 TO 25 KT. SEAS LESS THAN 2.5 M. 
.18 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.

.WITHIN 11N90W TO 11N91W TO 10N92W TO 09N92W TO 09N91W TO 09N90W
TO 11N90W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN S TO SW
SWELL.
.18 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.24 HOUR FORECAST LITTLE CHANGE.
.27 HOUR FORECAST WITHIN 11N86W TO 12N87W TO 12N88W TO 11N88W TO
10N86W TO 10N85W TO 11N86W...INCLUDING THE GULF OF PAPAGAYO...
NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
.42 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.

.WITHIN 30N118W TO 30N133W TO 26N133W TO 24N128W TO 25N122W TO
30N118W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN NW TO N SWELL.
.24 HOUR FORECAST WITHIN 30N122W TO 30N129W TO 27N129W TO
26N126W TO 30N122W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN NW
TO N SWELL.
.30 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.

.36 HOUR FORECAST WITHIN 02.5S112W TO 02.5S120W TO 03.4S120W TO
03.4S107.5W TO 02.5S112W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M
IN S TO SW SWELL.
.48 HOUR FORECAST WITHIN 02N112W TO 00N121W TO 03.4S120W TO
03.4S95W TO 02N112W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN S
TO SW SWELL.

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

CONVECTION VALID AT 0350 UTC THU MAR 12...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
A SURFACE TROUGH EXTENDS FROM 03N87W TO 02N96W TO 02N104W. THE 
ITCZ IS ANALYZED FROM 02N104W TO 01N123W AND BEYOND 02N140W.  

.FORECASTER RAMOS. NATIONAL HURRICANE CENTER.

NATIONAL WEATHER SERVICE HONOLULU HI

NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 180W

SYNOPSIS VALID 0000 UTC MAR 12 2026.
24 HOUR FORECAST VALID 0000 UTC MAR 13 2026.
48 HOUR FORECAST VALID 0000 UTC MAR 14 2026.

.WARNINGS.

...GALE WARNING...
.FRONT 30N159W 27N161W THENCE TROUGH 20N161W 14N172W MOV E 10 KT. 
S
WINDS 30 TO 40 KT N OF 25N BETWEEN 161W AND 156W. S WINDS 20 TO 
30 KT
ELSEWHERE N OF 21N BETWEEN 161W AND 152W. NUMEROUS MODERATE TSTMS
WITHIN 210 NM E OF TROUGH N OF 23N.
.24 HOUR FORECAST TROUGH 30N157W 23N158W 15N163W. S WINDS 20 TO 
25 KT
N OF 25N BETWEEN 157W AND 151W.
.48 HOUR FORECAST TROUGH DISSIPATED. NEW TROUGH 30N156W 20N159W
18N161W. S TO SW WINDS 20 TO 30 KT WITHIN 270 NM E OF TROUGH N OF 
20N.

.SYNOPSIS AND FORECAST.

.TROUGH 30N164W 25N168W MOVING ENE 25 KT. NW TO W WINDS 20 TO 25 
KT
N OF 20N W OF 165W.
.24 HOUR FORECAST TROUGH MOVED N OF AREA. WINDS INCLUDED WITH
FORECASTED TROUGH DESCRIBED BELOW.

.24 HOUR FORECAST NEW TROUGH 30N174W 26N175W. W TO NW WINDS 20 TO 
30
KT N OF 21N W OF 170W.
.48 HOUR FORECAST TROUGH 30N168W 23N173W 21N176W. W TO NW WINDS 
20 TO
30 KT N OF 20N W OF 168W.

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

.SEAS 4 TO 5.5 M N OF A LINE 30N175W 25N176W 24N180W. SEAS 2.5 TO 
4
ELSEWHERE N OF LINE 30N156W 25N155W 18N170W 17N180W.
.24 HOUR FORECAST SEAS 4 TO 5 M NW OF A LINE 30N173W 26N174W 
23N180W.
SEAS 2.5 TO 4 M ELSEWHERE N OF LINE 30N152W 26N154W 27N160W 
14N180W.
SEAS 2.5 TO 3 M E OF LINE 18N140W 19N143W 08N146W 05N140W.
.48 HOUR FORECAST SEAS 4 TO 5 M N OF 21N W OF 171W. SEAS 2.5 TO 4
M ELSEWHERE N OF LINE 30N155W 26N155W 14N180W. SEAS 2.5 TO 3 M
BOUNDED BY 12N140W 15N149W 09N152W 04N145W 06N140 12N140W.

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

.ITCZ 02N140W 01N156W...AND 06N163W 07N170W 05N180W. ISOLATED
MODERATE TSTMS WITHIN 180 NM N OF ITCZ E OF 142W.

$$

.FORECASTER M BALLARD. HONOLULU HI.