HSFEPI
HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1745 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC MAR 12.
24 HOUR FORECAST VALID 1200 UTC MAR 13.
48 HOUR FORECAST VALID 1200 UTC MAR 14.
.WARNINGS.
...STORM WARNING...
.COMPLEX LOW WITH FIRST CENTER 34N180W 995 MB MOVING S 15 KT AND
SECOND CENTER 31N177W 996 MB MOVING E 10 KT. FROM 36N TO 45N W OF
158W WINDS 25 TO 50 KT. SEAS 6 TO 11 M. ALSO S OF 49N W OF
154W...EXCEPT S OF 36N BETWEEN 158W AND 178W...WINDS 25 TO 40 KT.
SEAS 4 TO 8 M. ELSEWHERE S OF 36N BETWEEN 158W AND 178W WINDS TO
25 KT. SEAS 3 TO 6 M.
.24 HOUR FORECAST COMBINED LOW 32N173W 994 MB. FROM 35N TO 45N W
OF 151W WINDS 25 TO 40 KT. SEAS 4 TO 8 M. ELSEWHERE S OF 47N W OF
150W WINDS 20 TO 30 KT. SEAS 3 TO 6 M.
.48 HOUR FORECAST COMPLEX LOW WITH MEAN CENTER NEAR 34N167W 992
MB. WITHIN 600 NM NW QUADRANT WINDS 35 TO 45 KT. SEAS 5 TO 8 M.
ALSO S OF 49N W OF 144W...EXCEPT WITHIN 240 NM S AND 360 NM E
SEMICIRCLES WINDS 25 TO 35 KT. SEAS 3 TO 6 M.
...GALE WARNING...
.COMPLEX LOW WITH FIRST CENTER 59N143W 1011 MB MOVING SE 15 KT
AND SECOND CENTER 53N135W 1011 MB MOVING E 15 KT. WITHIN 180 NM
SW OF A LINE FROM 59N151W TO FIRST LOW CENTER TO SECOND LOW
CENTER TO 51N128W WINDS 25 TO 35 KT. SEAS 2.5 TO 5 M IN MIXED
SWELL.
.24 HOUR FORECAST COMPLEX LOW WITH FIRST CENTER 57N144W 1016 MB
AND SECOND CENTER INLAND 51N125W 1020 MB. ASSOCIATED CONDITIONS
DIMINISHED.
...HEAVY FREEZING SPRAY WARNING...
.MODERATE TO HEAVY FREEZING SPRAY N OF 56N BETWEEN 153W AND 158W.
ELSEWHERE LIGHT TO MODERATE FREEZING SPRAY N OF A LINE FROM
55N162W TO 53N150W TO 59N150W TO 59N142W TO 56N136W.
.24 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY WITHIN 120 NM
OF S ALASKAN COAST BETWEEN 135W AND 158W.
.48 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY N OF A LINE
FROM 55N172W TO 53N160W TO 59N150W.
.SYNOPSIS AND FORECAST.
.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 N OF 56N E OF
160W...AND FROM 36N TO 46N BETWEEN 139W AND 158W.
.24 HOUR FORECAST DENSE FOG FROM 56N TO 60N BETWEEN 157W AND
168W...WITHIN 120 NM N OF A LINE FROM 37N162W TO 36N154W TO
41N142W...AND WITHIN 90 NM N OF A LINE FROM 46N134W TO 47N125W.
.48 HOUR FORECAST DENSE FOG FROM 36N TO 46N BETWEEN 144W AND
165W.
.FORECASTER HYDE. 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 1200 UTC THU MAR 12.
24 HOUR FORECAST VALID 1200 UTC FRI MAR 13.
48 HOUR FORECAST VALID 1200 UTC SAT MAR 14.
.WARNINGS.
...GALE WARNING...
.WITHIN 16N94W TO 16N95W TO 15N95W TO 15N94W TO
16N94W...INCLUDING
THE GULF OF TEHUANTEPEC...N WINDS 20 TO 30 KT. SEAS 2.5 TO 3 M.
.06 HOUR FORECAST WITHIN 16N94W TO 16N95W TO 15N96W TO 14N95W TO
15N94W TO 16N94W...INCLUDING THE GULF OF TEHUANTEPEC...N WINDS
30 TO 35 KT. SEAS 3 TO 3.5 M. ELSEWHERE WITHIN 15N94W TO 16N94W
TO 16N95W TO 16N96W TO 14N96W TO 14N94W TO 15N94W...INCLUDING THE
GULF OF TEHUANTEPEC...N WINDS 20 TO 30 KT. SEAS 2.5 TO 3 M.
.24 HOUR FORECAST WITHIN 16N94W TO 16N95W TO 15N96W TO 14N96W TO
13N95W TO 14N95W TO 16N94W...INCLUDING THE GULF OF
TEHUANTEPEC...N TO NE WINDS 30 TO 40 KT. SEAS 4 TO 5.5 M.
ELSEWHERE WITHIN 16N94W TO 16N96W TO 12N97W TO 10N99W TO 10N97W
TO 12N94W TO 16N94W N TO NE WINDS 20 TO 30 KT. SEAS 3 TO 4.5 M.
REMAINDER OF AREA WITHIN 14N92W TO 16N95W TO 14N98W TO 10N99W TO
10N98W TO 12N93W TO 14N92W WINDS 20 KTOR LESS. SEAS 2.5 TO 3.5 M
IN N SWELL.
.30 HOUR FORECAST WITHIN 13N95W TO 16N94W TO 15N96W TO 12N98W TO
09N101W TO 09N99W TO 13N95W...INCLUDING THE GULF OF
TEHUANTEPEC...NE WINDS 20 TO 30 KT. SEAS 3 TO 4.5 M. ELSEWHERE
WITHIN 16N95W TO 14N99W TO 09N101W TO 09N100W TO 10N94W TO 12N92W
TO 16N95W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.5 M IN N SWELL.
.48 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.SYNOPSIS AND FORECAST.
.WITHIN 18N123W TO 30N116W TO 30N140W TO 02N140W TO 07N113W TO
18N123W...INCLUDING SEBASTIAN VIZCAINO BAY...WINDS 20 KT OR
LESS. SEAS 2.5 TO 3 M IN N TO NE SWELL.
.24 HOUR FORECAST WITHIN 17N125W TO 21N140W TO 02N140W TO
05N121W TO 07N119W TO 17N125W WINDS 20 KT OR LESS. SEAS 2.5 TO 3
M IN NE TO E SWELL.
.48 HOUR FORECAST WITHIN 12N130W TO 14N140W TO 04N140W TO
05N130W TO 12N130W WINDS 20 KT OR LESS. SEAS TO 2.5 M IN NE TO E
SWELL.
.15 HOUR FORECAST WITHIN 11N86W TO 12N86W TO 11N88W TO 10N88W TO
10N86W TO 11N86W...INCLUDING THE GULF OF PAPAGAYO...NE TO E
WINDS 20 TO 25 KT. SEAS TO 2.5 M.
.24 HOUR FORECAST WITHIN 11N86W TO 12N87W TO 11N90W TO 10N90W TO
10N87W TO 10N86W TO 11N86W...INCLUDING THE GULF OF PAPAGAYO...NE
TO E WINDS 20 TO 25 KT. SEAS TO 2.5 M.
.48 HOUR FORECAST LITTLE CHANGE.
.24 HOUR FORECAST WITHIN 02S109W TO 01S116W TO 01S120W TO
03.4S120W TO 03.4S106W TO 02S109W WINDS 20 KT OR LESS. SEAS TO
2.5 M IN S TO SW SWELL.
.48 HOUR FORECAST WITHIN 10N99W TO 11N130W TO 04N130W TO
03.4S120W TO 03.4S85W TO 01N95W TO 10N99W...EXCEPT LEE OF
GALAPAGOS ISLANDS...WINDS 20 KT OR LESS. SEAS 2.5 TO 3 M IN S TO
SW SWELL.
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.
CONVECTION VALID AT 1430 UTC THU MAR 12...
.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
SURFACE TROUGH FROM 07N77W TO 03N80W. ITCZ FROM 06N88W TO BEYOND
02N140W. FEW SHOWERS NEAR THE ITCZ.
.FORECASTER DELGADO. NATIONAL HURRICANE CENTER.
NATIONAL WEATHER SERVICE HONOLULU HI
NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 180W
SYNOPSIS VALID 1200 UTC MAR 12 2026.
24 HOUR FORECAST VALID 1200 UTC MAR 13 2026.
48 HOUR FORECAST VALID 1200 UTC MAR 14 2026.
.WARNINGS.
...GALE WARNING...
.TROUGH 30N158W 26N158W 23N160W 20N163W 18N165W 13N174W NEARLY
STATIONARY. S WINDS 20 TO 30 KT N OF 24N BETWEEN 150W AND 157W.
SCATTERED STRONG TSTMS WITHIN 330 NM E OF TROUGH N OF 17N. WIDELY
SCATTERED MODERATE TSTMS ELSEWHERE N OF 14N BETWEEN 148W AND
TROUGH.
.24 HOUR FORECAST TROUGH 30N160W 24N160W 20N164W 13N174W. S WINDS
25
TO 35 KT N OF 20N WITHIN 210 NM E OF TROUGH. S WINDS 20 TO 30 KT
ELSEWHERE N OF 17N BETWEEN 152W AND TROUGH.
.48 HOUR FORECAST TROUGH 30N155W 25N157W 20N162W 12N173W. S TO SW
WINDS 30 TO 40 KT WITHIN 360 NM E OF TROUGH N OF 20N. S TO SW
WINDS
20 TO 30 KT ELSEWHERE N OF A LINE 30N145W 20N150W 15N165W.
.SYNOPSIS AND FORECAST.
.TROUGH 30N167W 27N168W 25N171W 23N176W MOVING E 20 KT. NW TO W
WINDS 20 TO 30 KT N OF 21N W OF 170W. WIDELY SCATTERED MODERATE
TSTMS
N OF 22N BETWEEN 160W AND 172W.
.24 HOUR FORECAST TROUGH MERGED WITH TROUGH DESCRIBED ABOVE. WINDS
INCLUDED WITH FORECASTED LOW DESCRIBED BELOW.
.TROUGH 30N178W 29N180W MOVING ESE 20 KT.
.24 HOUR FORECAST TROUGH MERGED WITH FORECASTED LOW DESCRIBED
BELOW.
.24 HOUR FORECAST NEW LOW NEAR 29N171W 998 MB. TROUGH FROM LOW TO
27N168W 22N169W 18N172W. SECOND TROUGH FROM LOW TO 28N180W. NW TO
W
WINDS 20 TO 30 KT FROM 20N TO 28N W OF 168W.
.48 HOUR FORECAST LOW MOVED N OF AREA. TROUGH 30N164W 24N165W
18N174W. SECOND TROUGH 30N170W 28N180W. NW TO SW WINDS 20 TO 30 KT
N OF A LINE 21N180W 16N170W 15N165W...EXCEPT WITHIN AN AREA N OF
26N
BETWEEN 163W AND 173W.
.WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA.
.SEAS 4 TO 5.5 M N OF A LINE 30N170W 20N180W. SEAS 2.5 TO 4
ELSEWHERE N OF LINE 30N151W 23N154W 18N166W 14N180W.
.24 HOUR FORECAST SEAS 4 TO 5.5 M NW OF A LINE 30N168W 21N170W
20N180W. SEAS 2.5 TO 4 M ELSEWHERE N OF LINE 30N152W 20N160W
12N180W.
SEAS 2.5 TO 3 M E OF LINE 15N150W 04N160W.
.48 HOUR FORECAST SEAS 4 TO 5 M N OF A LINE 30N147W 20N153W
16N180W.
SEAS 2.5 TO 4 M ELSEWHERE N OF LINE 30N144W 17N152W 10N180W.
.SEAS 2.5 M OR LOWER OVER REMAINDER OF FORECAST AREA.
.ITCZ 02N140W 02N156W...AND 06N175W 06N180W.
$$
.FORECASTER TSAMOUS. HONOLULU HI.=