HSFEPI
HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1745 UTC THU SEP 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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).
FOR ANY TROPICAL CYCLONE INFORMATION BEYOND 48 HOURS REFERENCE
THE ASSOCIATED NWS TROPICAL CYCLONE FORECAST/ADVISORY (TCM).
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 SEP 17.
24 HOUR FORECAST VALID 1200 UTC SEP 18.
48 HOUR FORECAST VALID 1200 UTC SEP 19.
.WARNINGS.
...GALE WARNING...
.COMPLEX LOW WITH MAIN CENTER 49N157W 1021 MB MOVING NE 15 KT.
WITHIN 360 NM SE OF A LINE FROM LOW TO 44N167W WINDS 20 TO 30 KT.
SEAS TO 3 M.
.24 HOUR FORECAST LOW 56N145W 1006 MB. WITHIN AN AREA BOUNDED BY
A LINE FROM 59N146W TO 58N136W TO 40N146W TO 42N157W TO 59N146W
WINDS 20 TO 30 KT. SEAS TO 3 M.
.30 HOUR FORECAST LOW 58N145W 999 MB. WITHIN 240 NM NE AND 180 NM
W QUADRANTS WINDS 25 TO 35 KT. SEAS TO 3.5 M.
.48 HOUR FORECASTLOW DISSIPATED INLAND. N OF 50N BETWEEN 132W AND
137W WINDS 20 TO 30 KT. SEAS TO 3.5 M.
...GALE WARNING...
.LOW W OF AREA NEAR 56N166E 1009 MB MOVING E 25 KT WITH
ASSOCIATED CONDITIONS W OF AREA.
.18 HOUR FORECAST LOW 55N178E 1008 MB. WITHIN 420 NM SW QUADRANT
WINDS 25 TO 35 KT. SEAS TO 3.5 M.
.24 HOUR FORECAST LOW 55N174W 1006 MB. BETWEEN 180 NM AND 660 NM
SW SEMICIRCLE WINDS 25 TO 35 KT. SEAS 3 TO 5 M. ELSEWHERE FROM
44N TO 58N W OF 168W WINDS TO 25 KT. SEAS TO 3 M.
.48 HOUR FORECAST LOW 53N155W 984 MB. FROM 45N TO 54N BETWEEN
145W AND 165W WINDS 25 TO 40 KT. SEAS 3 TO 6 M. ELSEWHERE FROM
42N TO 55N BETWEEN 140W AND 175W AND N OF 55N BETWEEN 164W AND
173W WINDS 20 TO 30 KT. SEAS 2.5 TO 4 M.
.SYNOPSIS AND FORECAST.
.LOW 60N174W 1004 MB MOVING E 25 KT. FROM 50N TO 58N W OF 160W
WINDS TO 25 KT. SEAS TO 3.5 M.
.24 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED.
.FROM 39N TO 53N BETWEEN 125W AND 133W WINDS TO 25 KT. SEAS TO 3
M.
.24 HOUR FORECAST FROM 47N TO 50N BETWEEN 125W AND 129W WINDS TO
25 KT. SEAS TO 2.5 M.
.48 HOUR FORECAST CONDITIONS DIMINISHED.
.S OF 33N W OF 175W AREA OF SE WINDS TO 25 KT. SEAS TO 3 M.
.24 HOUR FORECAST CONDITIONS DIMINISHED.
.48 HOUR FORECAST FROM 33N TO 41N BETWEEN 120W AND 126W WINDS 20
TO 30 KT. SEAS TO 3 M.
.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM WITHIN 180 NM NW OF
A LINE FROM 43N155W TO 53N143W.
.24 HOUR FORECAST DENSE FOG FROM 55N TO 58N BETWEEN 139W AND
146W.
.48 HOUR FORECAST DENSE FOG N OF 60N W OF ALASKA AND WITHIN 90 NM
S AND SW OF BRITISH COLUMBIA AND ALASKA COAST FROM 132W TO 152W.
.FORECASTER KREKELER. 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 SEP 17.
24 HOUR FORECAST VALID 1200 UTC FRI SEP 18.
48 HOUR FORECAST VALID 1200 UTC SAT SEP 19.
.WARNINGS.
...GALE WARNING...
.WITHIN 16N95W TO 16N96W TO 12N98W TO 12N97W TO 13N95W TO 14N94W
TO 16N95W...INCLUDING THE GULF OF TEHUANTEPEC... N TO NE WINDS
20 TO 30 KT. SEAS 2.5 TO 3 M.
.12 HOUR FORECAST WITHIN 16N94W TO 16N95W TO 15N95W TO 15N94W TO
16N94W...INCLUDING THE GULF OF TEHUANTEPEC...N WINDS 30 TO 35
KT. SEAS 2.5 TO 3 M. ELSEWHERE WITHIN 15N94W TO 15N95W TO 15N96W
TO 14N96W TO 14N95W TO 15N94W N TO NE WINDS 20 TO 30 KT. SEAS TO
2.5 M.
.18 HOUR FORECAST LITTLE CHANGE...EXCEPT WINDS LESS THAN GALE
FORCE.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.
.SYNOPSIS AND FORECAST.
.WITHIN 11N86W TO 12N87W TO 12N88W TO 10N91W TO 10N88W TO 10N86W
TO 11N86W...INCLUDING THE GULF OF PAPAGAYO...NE TO E WINDS 20 TO
25 KT. SEAS 2.5 TO 3 M.
.24 HOUR FORECAST LITTLE CHANGE.
.30 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.
.LOW PRES NEAR 15N132W 1005 MB. WITHIN 20N124W TO 23N131W TO
24N140W TO 15N140W TO 14N133W TO 16N124W TO 20N124W NE TO E WINDS
20 TO 25 KT. SEAS 2.5 TO 3 M.
.24 HOUR FORECAST LOW PRES NEAR 15N135W 1006 MB. LITTLE CHANGE.
.48 HOUR FORECAST LOW PRES NEAR 15N139W 1006 MB. WITHIN 20N124W
TO 23N128W TO 24N140W TO 15N140W TO 14N133W TO 16N124W TO 20N124W
E WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0 M IN E SWELL.
.42 HOUR FORECAST LOW PRES NEAR 09N111W 1007 MB. WITHIN 10N107W
TO 11N109W TO 11N110W TO 10N112W TO 08N110W TO 09N108W TO 10N107W
E WINDS 20 TO 25 KT. SEAS 2.5 TO 3 M.
.48 HOUR FORECAST LOW PRES NEAR 10N112W 1007 MB. LITTLE CHANGE.
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.
CONVECTION VALID AT 1530 UTC THU SEP 17...
.LOW PRES NEAR 15N132W...NUMEROUS STRONG FROM 14N TO 17N BETWEEN
129W AND 135W. SCATTERED MODERATE ISOLATED STRONG FROM 06N TO 09N
BETWEEN 130W AND 135W AND FROM 13N TO 18N BETWEEN 123W AND 128W.
SCATTERED MODERATE WITHIN 30 NM OF LINE FROM 06N TO 09N BETWEEN
130W AND 135W.
.TROPICAL WAVE ALONG 115W FROM 06N TO 18N...NUMEROUS MODERATE TO
STRONG FROM 07N TO 11N BETWEEN 111W AND 119W AND FROM 12.5N TO
16N BETWEEN 114W AND 117W.
.TROPICAL WAVE ALONG 97W FROM 05N TO 18N...NUMEROUS MODERATE
ISOLATED STRONG FROM 09N TO 13N BETWEEN 90W AND 98W.
.SCATTERED MODERATE FROM 02N TO 09N BETWEEN 124W AND 131W.
.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH AXIS EXTENDS FROM 10N85W TO 07N102W TO 10N110W TO
13N121W. SCATTERED MODERATE ISOLATED STRONG FROM 02N TO 07N
BETWEEN 79W AND 95W. SCATTERED MODERATE WITHIN 120 NM N OF
THE TROUGH BETWEEN 103W AND 107W AND FROM 07N TO 12N BETWEEN
117W AND 121W.
.FORECASTER AGUIRRE. NATIONAL HURRICANE CENTER.
NATIONAL WEATHER SERVICE HONOLULU HI
NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 180W
SYNOPSIS VALID 1200 UTC SEP 17 2026.
24 HOUR FORECAST VALID 1200 UTC SEP 18 2026.
48 HOUR FORECAST VALID 1200 UTC SEP 19 2026.
.WARNINGS.
.NONE.
.SYNOPSIS AND FORECAST.
.LOW NEAR 10N158W 1006 MB MOVING W 10 KT. TROUGH FROM 10N151W
TO LOW TO 07N164W MOVING W 10 KT. ISOLATED MODERATE TSTMS WITHIN
180 NM OF TROUGH.
.24 HOUR FORECAST WEAK LOW NEAR 10N159W. TROUGH FROM 12N151W TO
LOW
TO 08N164W.
.48 HOUR FORECAST LOW DISSIPATED.
.TROUGH FROM 30N150W 26N152W 19N156W MOVING W 10 KT.
.24 HOUR FORECAST TROUGH FROM 30N151W 19N159W.
.48 HOUR FORECAST TROUGH DISSIPATED.
.48 HOUR FORECAST NEW LOW 14N140W 1008 MB. TROUGH FROM NEW LOW TO
09N147W.
.SEAS 2.5 M OR LOWER OVER FORECAST AREA.
.24 HOUR FORECAST SEAS 2.5 TO 3 M FROM 15N TO 20N E OF 145W.
.48 HOUR FORECAST SEAS 2.5 TO 3 M FROM 17N TO 19N BETWEEN 145W AND
142W.
.OTHERWISE...WINDS 20 KT OR LESS AND SEAS 2.5 M OR LOWER OVER THE
REMAINDER OF FORECAST AREA.
$$
.FORECASTER EE. HONOLULU HI.=