HSFEPI
HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0545 UTC TUE AUG 11 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC AUG 11.
24 HOUR FORECAST VALID 0000 UTC AUG 12.
48 HOUR FORECAST VALID 0000 UTC AUG 13.
.WARNINGS.
...GALE WARNING...
.FROM 38N TO 43N BETWEEN 123W AND 127W WINDS 25 TO 35 KT. SEAS 3
TO 4 M. ELSEWHERE FROM 36N TO 44N E OF 129W WINDS 20 TO 30 KT.
SEAS TO 3.5 M.
.24 HOUR FORECAST FROM 38N TO 42N BETWEEN 123W AND 127W WINDS 25
TO 35 KT. SEAS 2.5 TO 3.5 M. ELSEWHERE FROM 34N TO 43N BETWEEN
123W AND 129W WINDS 20 TO 30 KT. SEAS TO 3 M.
.48 HOUR FORECAST FROM 39N TO 43N BETWEEN 123W AND 127W WINDS 25
TO 35 KT. SEAS 3 TO 4 M. ELSEWHERE FROM 36N TO 44N BETWEEN 123W
AND 131W WINDS 20 TO 30 KT. SEAS TO 3 M.
.SYNOPSIS AND FORECAST.
.LOW 45N158W 1008 MB MOVING NE 10 KT THEN TURNING NW. WITHIN 180
NM E AND SE OF A LINE FROM 45N153W TO 38N161W WINDS TO 25 KT.
SEAS TO 2.5 M.
.24 HOUR FORECAST LOW DISSIPATE WITH CONDITIONS DESCRIBED WITH
LOW 44N163W 1001 MB.
.LOW 46N167W 1008 MB MOVING SE 15 KT. FROM 40N TO 50N BETWEEN
170W AND 178W WINDS TO 25 KT. SEAS LESS THAN 2.5 M.
.24 HOUR FORECAST LOW 44N163W 1001 MB. FROM 37N TO 47N BETWEEN
150W AND 167W WINDS TO 25 KT. SEAS TO 3 M.
.48 HOUR FORECAST LOW 47N160W 1003 MB. WITHIN 240 NM S AND SW
QUADRANTS...ALSO FROM 38N TO 50N BETWEEN 150W AND 155W...ALSO
FROM 56N TO 59N BETWEEN 153W AND 163W WINDS 20 TO 30 KT. SEAS TO
3 M.
.24 HOUR FORECAST LOW 58N178E 1002 MB. FROM 50N TO 57N W OF 176W
WINDS 20 TO 30 KT. SEAS TO 3 M.
.48 HOUR FORECAST LOW 54N175W 1001 MB. FROM 49N TO 58N BETWEEN
171W AND 180W WINDS TO 25 KT. SEAS TO 2.5 M.
.48 HOUR FORECAST FROM 46N TO 55N BETWEEN 125W AND 133W WINDS TO
25 KT. SEAS TO 3 M.
.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 45N TO 47N
BETWEEN 150W AND 157W...ALSO FROM 47N TO 49N BETWEEN 131W AND
136W.
.24 HOUR FORECAST DENSE FOG FROM 45N TO 52N BETWEEN 143W AND
160W.
.48 HOUR FORECAST DENSE FOG FROM 45N TO 57N BETWEEN 139W AND
167W.
.FORECASTER SHAW. 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 0000 UTC TUE AUG 11.
24 HOUR FORECAST VALID 0000 UTC WED AUG 12.
48 HOUR FORECAST VALID 0000 UTC THU AUG 13.
.WARNINGS.
.NONE.
.SYNOPSIS AND FORECAST.
.WITHIN 17N127W TO 20N140W TO 13N140W TO 11N127W TO 17N127W E
WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0 M.
.24 HOUR FORECAST WITHIN 17N130W TO 19N131W TO 20N140W TO
05N140W TO 09N135W TO 14N134W TO 17N130W SE WINDS 20 TO 25 KT.
SEAS 2.5 TO 3.0 M IN SE SWELL.
.48 HOUR FORECAST WITHIN 20N131W TO 26N140W TO 07N140W TO
10N135W TO 20N131W E TO SE WINDS 20 TO 30 KT. SEAS 2.5 TO 3.0 M
IN SE SWELL.
.WITHIN 16N94W TO 16N96W TO 15N96W TO 14N96W TO 14N95W TO 15N94W
TO 16N94W...INCLUDING THE GULF OF TEHUANTEPEC... N TO NE WINDS
20 TO 25 KT. SEAS LESS THAN 2.5 M.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.WITHIN 11N86W TO 11N91W TO 10N93W TO 09N95W TO 10N90W TO
11N86W...INCLUDING THE GULF OF PAPAGAYO... 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.
.24 HOUR FORECAST WITHIN 00N117W TO 02N124W TO 00N135W TO
03.4S120W TO 01S120W TO 03.4S111W TO 00N117W WINDS 20 KT OR
LESS. SEAS 2.5 TO 3.0 M IN S TO SW SWELL.
.48 HOUR FORECAST WITHIN 02N106W TO 03N121W TO 00N130W TO
01S120W TO 03.4S120W TO 03.4S99W TO 02N106W WINDS 20 KT OR LESS.
SEAS 2.5 TO 3.0 M IN S TO SW SWELL.
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.
CONVECTION VALID AT 0300 UTC TUE AUG 11...
.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 06N77W TO 04N83W. ITCZ FROM 04N83W TO
08N110W. MONSOON TROUGH FROM 11N113W TO 15N120W TO BEYOND
12N140W. SCATTERED MODERATE FROM 05N TO 10N BETWEEN 95W AND
105W...AND FROM 08N TO 19N BETWEEN 110W AND 120W.
$$
.FORECASTER CHRISTENSEN. NATIONAL HURRICANE CENTER.
NATIONAL WEATHER SERVICE HONOLULU HI
NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 180W
SYNOPSIS VALID 0000 UTC AUG 11 2026.
24 HOUR FORECAST VALID 0000 UTC AUG 12 2026.
48 HOUR FORECAST VALID 0000 UTC AUG 13 2026.
.WARNINGS.
.NONE.
.SYNOPSIS AND FORECAST
.TROUGH FROM 25N164W TO 30N157W MOVING E 10 KT.
.24 HOUR FORECAST TROUGH DISSIPATED.
.TROUGH FROM 10N173W TO 13N174W TO 16N175W MOVING W 10 KT.
.24 HOUR FORECAST TROUGH FROM 10N179W TO 16N178W.
.48 HOUR FORECAST TROUGH MOVED W OF AREA.
.LOW 11N142W 1007 MB NEARLY STATIONARY. SCATTERED MODERATE TSTMS
FROM 07N TO 12N E OF 143W.
.24 HOUR FORECAST LOW NEAR 12N142W 1005 MB. WINDS 20 TO 25 KT
FROM 07N TO 18N E OF 144W. SEAS OF 2.5 TO 3 M FROM 07N TO 18N E OF
146W.
.48 HOUR FORECAST LOW NEAR 15N142W 1002 MB. TROPICAL CYCLONE
POSSIBLE. WINDS 20 TO 30 KT FROM 09N TO 24N E OF 148W. SEAS OF 3.5
TO 4 M FROM 16N TO 18N E OF 143W. SEAS OF 2.5 TO 3.5 M ELSEWHERE
FROM 08N TO 25N E OF 149W.
.LOW 12N161W 1010 MB MOVING W 10 KT.
.24 HOUR FORECAST LOW 10N165W 1009 MB.
.48 HOUR FORECAST LOW 10N167W 1009 MB.
.OTHERWISE...WINDS 20 KT OR LESS OVER THE REMAINDER OF FORECAST
AREA.
.SEAS OF 2.5 TO 3 M FROM 12N TO 18N E OF 150W.
.24 HOUR FORECAST SEAS 2.5 TO 3 M FROM 12N TO 17N BETWEEN 146W
AND 157W.
.48 HOUR FORECAST SEAS OF 2.5 TO 3 M FROM 11N TO 20N BETWEEN 149W
AND 160W.
.OTHERWISE...SEAS 2.5 M OR LOWER OVER THE REMAINDER OF FORECAST
AREA.
.MONSOON TROUGH FROM 11N140W TO LOWS MENTIONED ABOVE NEAR 11N142W
AND 12N161W. SCATTERED MODERATE TSTMS UP TO 180 NM ALONG EITHER
SIDE OF THE MONSOON TROUGH W OF 143W.
.SCATTERED MODERATE TO ISOLATES STRONG TSTMS FROM 01N TO 07N
BETWEEN 150W AND 166W.
$$
.FORECASTER CHAN. HONOLULU HI.=