HSFEPI
HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2345 UTC TUE MAR 17 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC MAR 17.
24 HOUR FORECAST VALID 1800 UTC MAR 18.
48 HOUR FORECAST VALID 1800 UTC MAR 19.
.WARNINGS.
...GALE WARNING...
.LOW 58N144W 976 MB MOVING W 05 KT. WITHIN 90 NM SE AND S
QUADRANTS AND N OF 53N BETWEEN 150W AND 161W WINDS 35 TO 45 KT.
SEAS 3 TO 5.5 M. ELSEWHERE N OF A LINE FROM 54N133W TO 47N157W TO
50N165W WINDS 25 TO 35 KT. SEAS 2.5 TO 4.5 M.
.24 HOUR FORECAST LOW 58N146W 982 MB. N OF A LINE FROM 52N137W TO
46N154W TO 53N165W WINDS 25 TO 40 KT. SEAS 2.5 TO 4.5 M.
.48 HOUR FORECAST LOW 59N147W 989 MB. N OF 56N BETWEEN 150W AND
158W WINDS 35 TO 45 KT. SEAS 3 TO 5.5 M. ELSEWHERE N OF A LINE
FROM 51N134W TO 49N159W TO 52N166W WINDS 25 TO 35 KT. SEAS 2.5 TO
5 M.
...GALE WARNING...
.COMPLEX LOW WITH FIRST CENTER 37N154W 1005 MB MOVING NE 15 KT
AND SECOND CENTER 43N149W 1003 MB MOVING NE 25 KT. WITHIN 540 NM
W AND NW OF A LINE FROM 45N146W TO 34N158W WINDS 20 TO 30 KT.
SEAS 3 TO 5.5 M.
.24 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER 39N147W 1009 MB.
WITHIN 300 NM NW SEMICIRCLE WINDS 20 TO 30 KT. SEAS TO 4 M.
.30 HOUR FORECAST LOW 41N145W 1008 MB. WITHIN 180 NM NW
SEMICIRCLE WINDS 25 TO 35 KT. SEAS TO 4 M.
.48 HOUR FORECAST LOW 46N134W 1014 MB. WITHIN 180 NM W AND NW OF
A LINE FROM 48N131W TO THE LOW TO 40N140W WINDS 20 TO 30 KT. SEAS
TO 3 M.
...GALE WARNING...
.06 HOUR FORECAST FROM 30N TO 34N BETWEEN 176W AND 180W WINDS 25
TO 35 KT. SEAS 3 TO 4.5 M.
.24 HOUR FORECAST W OF A LINE FROM 42N180W TO 30N163W WINDS 20 TO
30 KT. SEAS 2.5 TO 4.5 M.
.48 HOUR FORECAST NEW LOW W OF AREA 36N178E 1008 MB. FROM 30N TO
41N BETWEEN 176W AND 180W WINDS 25 TO 35 KT. SEAS 3 TO 5 M.
ELSEWHERE W OF A LINE FROM 45N180W TO 34N170W TO 30N155W WINDS 20
TO 30 KT. SEAS TO 4 M.
...HEAVY FREEZING SPRAY WARNING...
.MODERATE TO HEAVY FREEZING SPRAY N OF A LINE FROM 58N151W TO
55N152W TO 54N163W. ELSEWHERE LIGHT TO MODERATE FREEZING SPRAY N
OF A LINE FROM 59N142W TO 52N148W TO 50N160W TO 52N170W TO
55N171W TO 59N179E.
.24 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N OF A LINE
FROM 58N151W TO 55N154W TO 54N163W. ELSEWHERE LIGHT TO MODERATE
FREEZING SPRAY N OF A LINE FROM 59N139W TO 50N149W TO 50N167W TO
58N177E.
.48 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N OF A LINE
FROM 58N149W TO 56N152W TO 54N159W TO 54N164W...AND N OF A LINE
FROM 58N175W TO 60N179W. ELSEWHERE LIGHT TO MODERATE FREEZING
SPRAY N OF A LINE FROM 57N142W TO 53N146W TO 51N160W TO 54N170W
TO 59N178E.
.SYNOPSIS AND FORECAST.
.ERUPTIVE ACTIVITY HAS BEEN DETECTED AT THE SHEVELUCH VOLCANO
LOCATED NEAR 56.4N 161.2E. TRACE AMOUNTS OF ASHFALL ARE POSSIBLE
OVER THE MARINE AREAS IN THE BERING SEA AND NORTH CENTRAL PACIFIC
DOWNWIND. MARINERS TRAVELING IN THE VICINITY OF THE BERING SEA
NEAR 59.0N 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.
.RESUSPENDED ASH IS POSSIBLE IN THE VICINITY OF KATMAI VOLCANO
NEAR 58.3N 155W AND PAVLOF VOLCANO NEAR 55.4N 161.9W. THERE IS NO
ERUPTION FROM EITHER VOLCANO. IF MARINERS ENCOUNTER VOLCANIC ASH
YOU ARE ENCOURAGED TO REPORT THE OBSERVATION WITH THE OCEAN
PREDICTION CENTER BY CALLING 301 683 1520.
.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM WITHIN 180 NM EITHER
SIDE OF A LINE FROM 49N125W TO 44N137W...AND WITHIN 90 NM EITHER
SIDE OF A LINE FROM 43N135W TO 35N144W.
.24 HOUR FORECAST DENSE FOG WITHIN 90 NM EITHER SIDE OF A LINE
FROM 49N125W TO 46N132W TO 40N138W.
.48 HOUR FORECAST DENSE FOG WITHIN 90 NM EITHER SIDE OF A LINE
FROM 46N127W TO 42N134W...AND N OF 58N BETWEEN 141W AND 150W.
.FORECASTER HUFFMAN. 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 TUE MAR 17.
24 HOUR FORECAST VALID 1800 UTC WED MAR 18.
48 HOUR FORECAST VALID 1800 UTC THU MAR 19.
.WARNINGS.
...GALE WARNING...
.WITHIN 16N94W TO 16N95W TO 15N96W TO 14N96W TO 14N94W TO 15N94W
TO 16N94W...INCLUDING THE GULF OF TEHUANTEPEC...N WINDS 30 TO 40
KT. SEAS 3.5 TO 4.5 M. ELSEWHERE...WITHIN 14N93W TO 16N94W TO
16N95W TO 14N97W TO 11N97W TO 13N93W TO 14N93W N TO NE WINDS 20
TO 30 KT. SEAS 2.5 TO 3.5 M.
.18 HOUR FORECAST WITHIN 15N94W TO 15N95W TO 13N97W TO 12N97W TO
11N96W TO 13N94W TO 15N94W...INCLUDING THE GULF OF
TEHUANTEPEC...N TO NE WINDS 20 TO 30 KT. SEAS 3.5 TO 4.5 M.
ELSEWHERE...WITHIN 14N93W TO 16N95W TO 14N97W TO 11N100W TO
09N98W TO 10N95W TO 14N93W NE WINDS 20 TO 30 KT. SEAS 2.5 TO 3.5
M.
.24 HOUR FORECAST WITHIN 14N94W TO 16N95W TO 15N96W TO 13N97W TO
11N99W TO 13N97W TO 14N94W...INCLUDING THE GULF OF
TEHUANTEPEC...N TO NE WINDS 20 TO 30 KT. SEAS 2.5 TO 3.5 M.
ELSEWHERE...WITHIN 14N94W TO 16N95W TO 11N100W TO 10N101W TO
09N98W TO 12N93W TO 14N94W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M
IN N TO NE SWELL.
.48 HOUR FORECAST WITHIN 16N95W TO 14N96W TO 13N97W TO 13N96W TO
14N94W TO 16N95W...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE
WINDS 20 TO 30 KT. SEAS 2.5 TO 3.0 M.
.SYNOPSIS AND FORECAST.
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.
CONVECTION VALID AT 2000 UTC TUE MAR 17...
.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
SURFACE TROUGH EXTENDS FROM 07N78W TO 03N100W. ITCZ EXTENDS FROM
01N107W TO 01N140W. SCATTERED MODERATE S OF 05N BETWEEN 89W AND
99W.
.FORECASTER KONARIK. NATIONAL HURRICANE CENTER.
NATIONAL WEATHER SERVICE HONOLULU HI
NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 180W
SYNOPSIS VALID 1800 UTC MAR 17 2026.
24 HOUR FORECAST VALID 1800 UTC MAR 18 2026.
48 HOUR FORECAST VALID 1800 UTC MAR 19 2026.
.WARNINGS.
.NONE.
.SYNOPSIS AND FORECAST.
.LOW 26N178W 1004 MB MOVING ENE SLOWLY. OCCLUDED FRONT FROM LOW TO
27N180W MOVING N SLOWLY. WARM FRONT FROM LOW TO 23N172W MOVING NE
SLOWLY. COLD FRONT FROM LOW TO 22N175W 15N171E MOVING E SLOWLY.
WINDS 20 TO 30 KT N OF OCCLUDED FRONT AND WARM FRONT. ISOLATED
MODERATE TSTMS WITHIN 180 NM E AND SE OF COLD FRONT S OF 22N.
.24 HOUR FORECAST LOW 26N175W 1007 MB. OCCLUDED FRONT FROM LOW TO
28N180W. WARM FRONT FROM LOW TO 26N165W. COLD FRONT FROM LOW TO
24N170W 20N172W 16N175E. WINDS 20 TO 30 KT N OF OCCLUDED FRONT AND
WARM FRONT.
.48 HOUR FORECAST LOW 23N165W 1009 MB. OCCLUDED FRONT FROM LOW TO
25N175W 30N180W. WARM FRONT FROM LOW TO 24N158W. COLD FRONT FROM
LOW TO 20N165W 15N180W. WINDS 20 TO 30 KT N OF OCCLUDED FRONT AND
WARM FRONT.
.TROUGH 30N146W 20N154W 15N166W MOVING NE SLOWLY. ISOLATED
MODERATE
TSTMS WITHIN 180 NM E AND SE OF TROUGH.
.24 HOUR FORECAST TROUGH 30N145W 20N151W 16N165W.
.48 HOUR FORECAST TROUGH 30N146W 19N155W.
.WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA.
.SEAS 2.5 TO 4.5 M N OF LINE 30N147W 23N160W 10N170W 16N180W.
.24 HOUR FORECAST SEAS 2.5 TO 4.5 M N OF LINE 30N146W 23N160W
15N180W.
.48 HOUR FORECAST SEAS 2.5 TO 4 M N OF LINE 30N150W 25N165W
13N180W.
.SEAS 2.5 M OR LOWER OVER REMAINDER OF FORECAST AREA.
.ITCZ 03N140W 01N148W.
.ISOLATED MODERATE TSTMS FROM 05N TO 10N W OF 178W...AND WITHIN 90
NM OF 05N155W.
$$
.FORECASTER WROE. HONOLULU HI.=