HSFEPI
HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1745 UTC FRI MAY 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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).
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 MAY 15.
24 HOUR FORECAST VALID 1200 UTC MAY 16.
48 HOUR FORECAST VALID 1200 UTC MAY 17.
.WARNINGS.
...GALE WARNING...
.LOW 51N173W 978 MB MOVING NE 10 KT. BETWEEN 180 NM AND 420 NM S
QUADRANT WINDS 35 TO 45 KT. SEAS 6 TO 10 M. ALSO FROM 38N TO 56N
BETWEEN 157W AND 179E WINDS 25 TO 35 KT. SEAS 3 TO 6 M...HIGHEST
S OF THE ALEUTIAN ISLANDS. ELSEWHERE FROM 36N TO 57N BETWEEN 155W
AND 177E WINDS TO 25 KT. SEAS TO 3 M.
.24 HOUR FORECAST LOW 55N167W 975 MB. N OF A FRONT FROM 59N168W
TO 58N163W TO 56N155W...AND BETWEEN 120 NM AND 420 NM S
SEMICIRCLE WINDS 35 TO 45 KT. SEAS 3 TO 8 M...HIGHEST S OF THE
ALEUTIAN ISLANDS. ALSO WITHIN 420 NM NE...540 NM SE...780 NM
SW...AND 480 NM NW QUADRANTS...AND FROM 53N TO 59N BETWEEN 148W
AND 158W WINDS 25 TO 35 KT. SEAS 2.5 TO 5 M. ELSEWHERE...EXCEPT
WHERE DESCRIBED WITH LOW 43N164W BELOW...FROM 33N TO 60N BETWEEN
142W AND 180W WINDS TO 25 KT. SEAS 2.5 TO 4 M.
.48 HOUR FORECAST LOW 57N171W 980 MB. WITHIN 720 NM SE QUADRANT
WINDS 25 TO 35 KT. SEAS 3 TO 6 M...HIGHEST NEAR 54N159W.
ELSEWHERE...EXCEPT WHERE DESCRIBED WITH LOW 58N152W
BELOW...WITHIN 240 NM NE...780 NM SE...720 NM SW...AND 420 NM NW
QUADRANTS WINDS 20 TO 30 KT. SEAS 2.5 TO 4.5 M...HIGHEST SE OF
CENTER.
...GALE WARNING...
.FROM 32N TO 41N BETWEEN 121W AND 128W AREA OF NW TO N WINDS 25
TO 35 KT. SEAS 2.5 TO 4 M.
.24 HOUR FORECAST FROM 32N TO 40N BETWEEN 121W AND 126W AREA OF
NW TO N WINDS 30 TO 40 KT. SEAS 3 TO 5 M. ELSEWHERE FROM 30N TO
41N BETWEEN 119W AND 129W AREA OF NW TO N WINDS 20 TO 30 KT. SEAS
TO 4 M.
.48 HOUR FORECAST FROM 32N TO 40N BETWEEN 119W AND 128W AREA OF
NW TO N WINDS 30 TO 40 KT. SEAS 3 TO 6 M. ELSEWHERE S OF 42N
BETWEEN 116W AND 130W AREA OF NW TO N WINDS 20 TO 30 KT. SEAS TO
4 M.
...GALE WARNING...
.LOW W OF AREA 38N175E 1016 MB MOVING NE 35 KT. CONDITIONS
DESCRIBED WITH LOW 51N173W ABOVE.
.18 HOUR FORECAST LOW 42N168W 1006 MB. WITHIN 240 NM SE OF A
FRONT FROM 50N150W TO LOW CENTER TO 36N175W WINDS 25 TO 35 KT.
SEAS 2.5 TO 4.5 M.
.24 HOUR FORECAST LOW 43N164W 1005 MB. WITHIN 240 NM SE OF A
FRONT FROM 48N150W TO LOW CENTER TO 36N170W WINDS 25 TO 35 KT.
SEAS 3 TO 6 M. ELSEWHERE CONDITIONS DESCRIBED WITH LOW 55N167W
ABOVE.
.48 HOUR FORECAST LOW ABSORBED BY NEW LOW 58N152W 992 MB. WITHIN
120 NM N OF A FRONT FROM 59N145W TO LOW CENTER TO 58N147W TO
55N140W WINDS 30 TO 45 KT. SEAS 3 TO 5.5 M. ELSEWHERE N OF 42N
BETWEEN 134W AND 150W WINDS 20 TO 30 KT. SEAS 2.5 TO 4.5 M IN
MIXED SWELL.
.SYNOPSIS AND FORECAST.
.LOW 51N135W 1012 MB MOVING E 20 KT. BETWEEN 60 NM AND 420 NM SW
SEMICIRCLE WINDS 20 TO 30 KT. SEAS 3 TO 5 M. ELSEWHERE FROM 40N
TO 54N BETWEEN 129W AND 155W WINDS TO 25 KT. SEAS 2.5 TO 3.5 M.
.24 HOUR FORECAST LOW INLAND NEAR 49N124W 1016 MB. WITHIN 720 NM
SW QUADRANT WINDS TO 25 KT. SEAS 2.5 TO 3.5 M.
.48 HOUR FORECAST CONDITIONS DIMINISHED.
.48 HOUR FORECAST NEW LOW NEAR 46N178W 1006 MB. WITHIN 300 NM S
SEMICIRCLE WINDS 20 TO 30 KT. SEAS 2.5 TO 3.5 M.
.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 47N TO 60N
BETWEEN 154W AND 180W...AND WITHIN 120 NM S OF A LINE FROM
42N170W TO 38N180W.
.24 HOUR FORECAST DENSE FOG N OF 47N W OF 160W...AND FROM 46N TO
58N BETWEEN 145W AND 160W.
.48 HOUR FORECAST DENSE FOG WITHIN THE BERING SEA...AND WITHIN
240 NM EITHER SIDE OF A LINE FROM 59N154W TO 59N143W TO 47N138W.
.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 1200 UTC FRI MAY 15.
24 HOUR FORECAST VALID 1200 UTC SAT MAY 16.
48 HOUR FORECAST VALID 1200 UTC SUN MAY 17.
.WARNINGS.
.NONE.
.SYNOPSIS AND FORECAST.
.WITHIN 20N131W TO 22N137W TO 25N140W TO 07N140W TO 09N133W TO
15N129W TO 20N131W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN NE
SWELL.
.24 HOUR FORECAST WITHIN 19N136W TO 27N140W TO 09N140W TO
12N135W TO 10N130W TO 15N131W TO 19N136W NE TO E WINDS 20 TO 25
KT. SEAS 2.5 TO 3.0 M.
.48 HOUR FORECAST WITHIN 16N128W TO 21N140W TO 07N140W TO
06N132W TO 11N128W TO 16N128W WINDS 20 KT OR LESS. SEAS 2.5 TO
3.0 M IN NE SWELL.
.WITHIN 16N94W TO 16N95W TO 15N95W TO 14N95W TO 15N94W TO
16N94W...INCLUDING GULF OF TEHUANTEPEC...N WINDS 20 TO 25 KT.
SEAS LESS THAN 2.5 M.
.09 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.WITHIN 11N86W TO 11N87W TO 11N88W TO 10N88W TO 10N87W TO
11N86W...INCLUDING GULF OF PAPAGAYO...NE TO E WINDS 20 TO 25 KT.
SEAS LESS THAN 2.5 M.
.24 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.42 HOUR FORECAST WITHIN 11N86W TO 11N87W TO 11N88W TO 10N88W TO
10N87W TO 10N86W TO 11N86W...INCLUDING GULF OF PAPAGAYO...NE TO
E WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
.48 HOUR FORECAST LITTLE CHANGE.
.12 HOUR FORECAST WITHIN 30N118W TO 30N132W TO 28N129W TO
27N122W TO 28N119W TO 30N118W WINDS 20 KT OR LESS. SEAS 2.5 TO
3.0 M IN NW TO N SWELL.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST WITHIN 30N118W TO 30N127W TO 28N126W TO
28N121W TO 28N118W TO 30N118W NW TO N WINDS 20 TO 25 KT. SEAS 4.0
TO 4.5 M IN N SWELL. ELSEWHERE WITHIN 30N118W TO 30N136W TO
24N140W TO 23N120W TO 26N115W TO 30N118W...INCLUDING ENTRANCE TO
SEBASTIAN VIZCAINO BAY...WINDS 20 KT OR LESS. SEAS 2.5 TO 4.0 M
IN N TO NE SWELL.
.24 HOUR FORECAST WITHIN 02S113W TO 01S115W TO 02S120W TO
03.4S120W TO 03S113W TO 02S113W WINDS 20 KT OR LESS. SEAS 2.5 TO
3.0 M IN S SWELL.
.48 HOUR FORECAST WITHIN 01S118W TO 01S120W TO 03.4S120W TO
03.4S117W TO 01S118W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN S
SWELL.
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.
CONVECTION VALID AT 1500 UTC FRI MAY 15...
.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH AXIS EXTENDS FROM 07N78W TO 04N95W. ITCZ AXIS
EXTENDS FROM 04N95W TO 04N115W...AND FROM 04N120W TO BEYOND
05N140W. SCATTERED MODERATE TO ISOLATED STRONG FROM 02N TO 07N E
OF 96W. SCATTERED TO NUMEROUS MODERATE WITH ISOLATED STRONG FROM
02N TO 09N W OF 120W.
.FORECASTER CHAN. NATIONAL HURRICANE CENTER.
NATIONAL WEATHER SERVICE HONOLULU HI
NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 180W
SYNOPSIS VALID 1200 UTC MAY 15 2026.
24 HOUR FORECAST VALID 1200 UTC MAY 16 2026.
48 HOUR FORECAST VALID 1200 UTC MAY 17 2026.
.WARNINGS.
.NONE.
.SYNOPSIS AND FORECAST.
.TROUGH 30N158W 25N159W 21N158W MOVING W 10 KT. SCATTERED
MODERATE TSTMS FROM 26N TO 22N BETWEEN 160W AND 155W.
.24 HOUR FORECAST TROUGH 30N163W 24N164W 20N163W.
.48 HOUR FORECAST TROUGH 30N166W 25N167W.
.24 HOUR FORECAST NEW TROUGH 17N154W 06N164W.
.48 HOUR FORECAST TROUGH 20N157W 12N161W.
.WINDS 20 TO 25 KT N OF 23N BETWEEN 170W AND 150W...AND FROM
22N TO 09N W OF 168W.
.24 HOUR FORECAST WINDS 20 TO 25 KT FROM 24N TO 10N E OF 153W.
.48 HOUR FORECAST WINDS 20 TO 25 KT FROM 19N TO 10N E OF 158W.
.WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST AREA.
.SEAS 2.5 TO 3 M N OF 23N E OF 170W...FROM 25N TO 06N
W OF 161W...AND FROM 23N TO 07N E OF 157W.
.24 HOUR FORECAST SEAS 2.5 TO 3 M E OF LINE 30N152W 26N160W
22N158W 19N153W 07N149W 08N140W...AND FROM 20N TO 10N W OF 170W.
.48 HOUR FORECAST SEAS 2.5 TO 3 M FROM 26N TO 06N E OF 154W.
.SEAS 2.5 M OR LOWER OVER REMAINDER OF FORECAST AREA.
.ITCZ 05N140W 05N149W...AND 04N158W 04N180W. SCATTERED MODERATE
TSTMS FROM 08N TO 02N E OF 145W...AND FROM 10N TO 01N W OF 157W.
.ISOLATED MODERATE TSTMS FROM 12N TO 08N BETWEEN 157W AND 151W.
$$
.FORECASTER TROTTER. HONOLULU HI.=