HSFEPI
HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2345 UTC SUN MAR 15 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 15.
24 HOUR FORECAST VALID 1800 UTC MAR 16.
48 HOUR FORECAST VALID 1800 UTC MAR 17.
.WARNINGS.
...STORM WARNING...
.LOW 52N140W 988 MB MOVING N 20 KT AND TURNING NW WITHIN NEXT 24
HOURS. WITHIN 360 NM E QUADRANT WINDS 35 TO 50 KT. SEAS 3 TO 5.5
M. ELSEWHERE FROM 42N TO 58N BETWEEN 126W AND 146W WINDS 25 TO
40 KT. SEAS 2.5 TO 5 M.
.24 HOUR FORECAST LOW ABSORBED INTO LOW 59N145W DESCRIBED BELOW.
...STORM WARNING...
.COMPLEX LOW WITH MAIN LOW 34N163W 988 MB NEARLY STATIONARY AND
SECOND LOW 42N156W 989 MB MOVING NE 25 KT. WITHIN 540 NM W AND
420 NM N AND NW QUADRANTS OF SECOND LOW WINDS 30 TO 45 KT. SEAS
4 TO 7 M. ELSEWHERE S OF 50N BETWEEN 174W AND 140W WINDS 25 TO
40 KT. SEAS 2.5 TO 5.5 M.
.12 HOUR FORECAST LOW 36N165W 987 MB. WITHIN 300 NM W AND NW
QUADRANTS WINDS 35 TO 50 KT. SEAS 4.5 TO 7.5 M.
.24 HOUR FORECAST COMPLEX LOW WITH MAIN LOW 35N163W 989 MB AND
SECOND LOW 40N155W 998 MB AND THIRD LOW 51N137W 992 MB.
CONDITIONS WITH THIRD LOW DESCRIBED BELOW. FROM 30N TO 45N
BETWEEN 150W AND 172W WINDS 25 TO 40 KT. SEAS 3.5 TO 8 M.
.48 HOUR FORECAST COMPLEX LOW WITH FIRST LOW 37N155W 1004 MB AND
SECOND LOW 42N150W 1002 MB. FROM 32N TO 45N BETWEEN 148W AND
163W WINDS 20 TO 30 KT. SEAS 3 TO 4.5 M.
...GALE WARNING...
.24 HOUR FORECAST LOW 51N137W 992 MB. WITHIN 420 NM E AND 480 NM
SE QUADRANTS WINDS 25 TO 40 KT. SEAS 2.5 TO 5.5 M.
.48 HOUR FORECAST LOW DISSIPATED INLAND AND ASSOCIATED
CONDITIONS DIMINISHED.
...GALE WARNING...
.LOW 55N145W 999 MB MOVING N 10 KT AND SLOWING. FROM 50N TO 59N
BETWEEN 149W AND 167W WINDS 25 TO 35 KT. SEAS TO 3.5 M.
.24 HOUR FORECAST LOW 59N145W 981 MB. FROM 50N TO 60N BETWEEN
148W AND 165W WINDS 30 TO 45 KT. SEAS 2.5 TO 6 M.
.48 HOUR FORECAST LOW 59N146W 981 MB. FROM 51N TO 60N BETWEEN
146W AND 162W WINDS 30 TO 45 KT. SEAS 2.5 TO 6 M.
...HEAVY FREEZING SPRAY WARNING...
.MODERATE TO HEAVY FREEZING SPRAY FROM 54N TO 58N BETWEEN 154W
AND 163W. ELSEWHERE LIGHT TO MODERATE FREEZING SPRAY N OF A LINE
FROM 54N174W TO 53N160W TO 56N152W TO 60N150W TO 60N145W.
.24 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N OF A LINE
FROM 54N168W TO 54N153W TO 57N150W. ELSEWHERE LIGHT TO MODERATE
FREEZING SPRAY N OF A LINE FROM 53N172W TO 52N160W TO 53N148W TO
59N149W TO 60N144W.
.48 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N AND NW OF A
LINE FROM 53N164W TO 57N150W. ELSEWHERE LIGHT TO MODERATE
FREEZING SPRAY N OF 58N W OF 174W...AND N OF A LINE FROM 55N170W
TO 52N160W TO 58N148W TO 60N143W.
.SYNOPSIS AND FORECAST.
.SHEVELUCH VOLCANO NEAR 57N161E IS IN A STATE OF UNREST.
MARINERS TRAVELLING IN THE W BERING SEA SHOULD EXERCISE CAUTION.
PLEASE REPORT ANY OBSERVATIONS OF VOLCANIC ASH TO THE OCEAN
PREDICTION CENTER AT 301 683 1520.
.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 40N TO 52N
BETWEEN 140W AND 158W...AND FROM 52N TO 59N E OF 149W.
.24 HOUR FORECAST DENSE FOG FROM 49N TO 55N E OF 140W.
.48 HOUR FORECAST DENSE FOG WITHIN 300 NM NW OF A LINE FROM
35N141W TO 46N124W.
.FORECASTER ROWLAND. 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 1800 UTC SUN MAR 15.
24 HOUR FORECAST VALID 1800 UTC MON MAR 16.
48 HOUR FORECAST VALID 1800 UTC TUE MAR 17.
.WARNINGS.
...GALE WARNING...
.30 HOUR FORECAST WITHIN 16N94W TO 16N95W TO 16N96W TO 15N96W TO
15N95W TO 15N94W TO 16N94W...INCLUDING THE GULF OF
TEHUANTEPEC... NW TO N WINDS 20 TO 30 KT. SEAS LESS THAN 2.5 M.
.36 HOUR FORECAST WITHIN 16N94W TO 16N95W TO 15N96W TO 15N94W TO
16N94W...INCLUDING THE GULF OF TEHUANTEPEC... NW WINDS 25 TO 35
KT. SEAS 2.5 TO 3.0 M IN S TO SW SWELL. ELSEWHERE WITHIN 15N93W
TO 15N94W TO 15N96W TO 13N95W TO 13N94W TO 15N93W NW WINDS 20 TO
25 KT. SEAS LESS THAN 2.5 M.
.48 HOUR FORECAST WITHIN 16N94W TO 16N95W TO 15N96W TO 15N95W TO
15N94W TO 16N94W...INCLUDING THE GULF OF TEHUANTEPEC... N WINDS
30 TO 40 KT. SEAS 3.0 TO 4.0 M. ELSEWHERE WITHIN 15N94W TO
15N96W TO 13N97W TO 12N97W TO 11N94W TO 13N93W TO 15N94W N TO NE
WINDS 20 TO 30 KT. SEAS 2.5 TO 3.0 M.
.SYNOPSIS AND FORECAST.
.WITHIN 05N81W TO 13N91W TO 13N114W TO 08N119W TO 03.4S110W TO
03.4S81W TO 05N81W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN S
TO SW SWELL.
.24 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.WITHIN 30N120W TO 30N125W TO 29N125W TO 28N124W TO 28N121W TO
30N120W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN NW TO N SWELL.
.12 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
2.5 M.
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.
CONVECTION VALID AT 2100 UTC SUN MAR 15...
.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
SURFACE TROUGH EXTENDS FROM 07N78W TO 02N95W. THE ITCZ EXTENDS
FROM 02N95W TO 00N98W TO 02S130W TO BEYOND 00N140W. SCATTERED
MODERATE CONVECTION IS NOTED FROM 03N TO 05N BETWEEN 90W AND
95W. SCATTERED MODERATE CONVECTION IS NOTED FROM 06N TO 11N
BETWEEN 125W AND 135W.
$$
.FORECASTER CHRISTENSEN. NATIONAL HURRICANE CENTER.
NATIONAL WEATHER SERVICE HONOLULU HI
NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 180W
SYNOPSIS VALID 1800 UTC MAR 15 2026.
24 HOUR FORECAST VALID 1800 UTC MAR 16 2026.
48 HOUR FORECAST VALID 1800 UTC MAR 17 2026.
.WARNINGS.
...GALE WARNING...
.TROUGH 30N150W 20N155W 15N160W 10N170W 09N180W NEARLY STATIONARY
THEN MOVING E 15 KT. WINDS 30 TO 40 KT WITHIN 210 NM OF TROUGH N
OF 25N. WINDS 20 TO 30 KT ELSEWHERE N OF 20N BETWEEN 155W AND
145W.
ISOLATED MODERATE TSTMS WITHIN 120 NM OF TROUGH.
.24 HOUR FORECAST TROUGH 30N149W 20N154W 20N167W. WINDS 20 TO 25
KT
WITHIN 120 NM OF TROUGH.
.48 HOUR FORECAST TROUGH 30N145W 15N160W. WINDS DIMINISHING TO
20 KT OR LESS.
.SYNOPSIS AND FORECAST.
.FRONT 30N151W 25N155W 20N160W 15N176W. MOVING NE 5 KT. WINDS
20 TO 30 KT N OF 20N BETWEEN 160W AND 155W.
.24 HOUR FORECAST FRONT WEAKENING TO TROUGH 30N150W 25N156W
15N170W. WINDS DIMINISHING TO 20 KT OR LESS.
.48 HOUR FORECAST TROUGH MERGED WITH TROUGH NEAR 30N145W.
.FRONT 30N164W 25N170W 25N180W MOVING E 15 KT. WINDS 20 TO 25 KT
N OF LINE 30N170W 22N160W 30N160W.
.24 HOUR FORECAST FRONT 30N151W 22N160W 21N165W. WINDS 20 TO 25 KT
N OF 28N BETWEEN 169W AND 160W.
.48 HOUR FORECAST FRONT 30N147W 25N155W 15N160W. WINDS DIMINISHING
TO 20 KT OR LESS.
.48 HOUR FORECAST NEW FRONT 26N180W 23N177W. WINDS 20 TO 30 KT
N OF 25N W OF 177W.
.WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA.
.SEAS 4 TO 5 M N OF LINE 26N180W 25N170W 25N160W 25N150W 30N145W.
SEAS 2.5 TO 4 M ELSEWHERE N OF LINE 13N180W 15N160W 20N150W
30N145W.
.24 HOUR FORECAST SEAS 2.5 TO 4 M N OF LINE 15N180W 15N170W
20N150W 30N145W.
.48 HOUR FORECAST SEAS 18N180W 15N150W 30N145W.
.SEAS 2.5 M OR LOWER OVER REMAINDER OF FORECAST AREA.
.ITCZ 03N158W 02N150W 02N140W.
$$
.FORECASTER PECHACEK. HONOLULU HI.=