609
FZPN01 KWBC 181614
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1630 UTC TUE AUG 18 2026

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 TUE AUG 18.
24 HOUR FORECAST VALID 1200 UTC WED AUG 19.
48 HOUR FORECAST VALID 1200 UTC THU AUG 20.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.N OF 62N BETWEEN THE W COAST OF ALASKA AND 172W N WINDS
TO 25 KT. SEAS TO 3 M.
.24 HOUR FORECAST CONDITIONS DIMINISHED.

.LOW 52N156W 1014 MB MOVING NE 20 KT. WITHIN 240 NM NE...AND
300 NM S AND SE QUADRANTS WINDS 20 TO 30 KT. SEAS TO 3 M.
.24 HOUR FORECAST LOW 57N146W 1016 MB. WITHIN 360 NM SE OF
A LINE FROM 55N149W TO 45N160W WINDS TO 25 KT. SEAS TO 3 M.
.48 HOUR FORECAST LOW DISSIPATED. ASSOCIATED CONDITIONS
ABSORBED BY LOW 57N151W DESCRIBED BELOW.

.LOW 53N171W 1008 MB MOVING NE 15 KT. FROM 47N TO 54N BETWEEN
175W AND 163W WINDS TO 25 KT. SEAS TO 3 M.
.24 HOUR FORECAST LOW 55N164W 1010 MB. WITHIN 300 NM SE AND
360 NM SW QUADRANTS WINDS TO 25 KT. SEAS TO 2.5 M.
.48 HOUR FORECAST LOW 57N151W 1012 MB. WITHIN 300 NM NE AND
600 NM SE QUADRANTS WINDS TO 25 KT. SEAS TO 3 M...HIGHEST NE
QUADRANT.

.FROM 32N TO 51N BETWEEN 118W AND 130W N WINDS TO 25 KT.
SEAS TO 2.5 M.
.24 HOUR FORECAST FROM 30N TO 50N BETWEEN 118W AND 129W
N TO NW WINDS TO 25 KT. SEAS TO 2.5 M.
.48 HOUR FORECAST FROM 33N TO 54N BETWEEN 120W AND 132W
N TO NW WINDS 20 TO 30 KT. SEAS TO 3 M.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 44N
TO 54N BETWEEN 140W AND 165W.
.24 HOUR FORECAST DENSE FOG FROM 46N TO 49N BETWEEN 139W
AND 144W...AND FROM 48N TO 55N BETWEEN 142W AND 155W.
.48 HOUR FORECAST DENSE FOG FROM 45N TO 55N BETWEEN 145W
AND 155W.

.FORECASTER MILLS. 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 TUE AUG 18.
24 HOUR FORECAST VALID 1200 UTC WED AUG 19.
48 HOUR FORECAST VALID 1200 UTC THU AUG 20.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.WITHIN 16N95W TO 13N96W TO 14N95W TO 16N95W...INCLUDING THE
GULF OF TEHUANTEPEC...N TO NE WINDS 20 TO 30 KT. SEAS TO 3.5 M.
ELSEWHERE WITHIN 15N94W TO 16N95W TO 15N95W TO 14N97W TO 13N96W
TO 13N95W TO 15N94W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN N
TO NE SWELL. WITHIN 11N99W TO 11N100W TO 11N101W TO 10N103W TO
09N102W TO 10N101W TO 11N99W WINDS 20 KT OR LESS. SEAS 2.5 M IN
MIXED SWELL.
.24 HOUR FORECAST GULF OF TEHUANTEPEC N OF 15N N WINDS 20 TO 25
KT. SEAS TO 2.5 M. WITHIN 15N95W TO 14.5N95.5W TO 14N95.5W TO
14N95W TO 15N95W WINDS 20 KT OR LESS. SEAS 2.5 M IN N TO NE
SWELL.
.48 HOUR FORECAST GULF OF TEHUANTEPEC N OF 15.5N N WINDS 20 TO
25 KT. SEAS LESS THAN 2.5 M.

.WITHIN 15N129W TO 15N132W TO 13N134W TO 11N132W TO 10N128W TO
11N126W TO 15N129W WINDS 20 KT OR LESS. SEAS 2.5 M IN E TO SE
SWELL.
.24 HOUR FORECAST WITHIN 16N133W TO 16N135W TO 16N137W TO
13N137W TO 13N135W TO 14N133W TO 16N133W WINDS 20 KT OR LESS.
SEAS 2.5 M IN E TO SE SWELL.
.48 HOUR FORECAST WITHIN 17N136W TO 18N136W TO 19N139W TO
17N140W TO 14N140W TO 14N137W TO 17N136W WINDS 20 KT OR LESS.
SEAS 2.5 M IN E TO SE SWELL.

.WITHIN 02N96W TO 06N100W TO 01N114W TO 00N131W TO 03.4S120W TO
03.4S87W TO 02N96W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN SE
TO S SWELL.
.24 HOUR FORECAST WITHIN 00N92W TO 06N104W TO 04N111W TO 00N135W
TO 03.4S120W TO 03S81W TO 00N92W WINDS 20 KT OR LESS. SEAS 2.5
TO 3.0 M IN SE TO S SWELL.
.48 HOUR FORECAST WITHIN 02N95W TO 05N96W TO 00N137W TO
03.4S120W TO 03.4S89W TO 02S81W TO 02N95W WINDS 20 KT OR LESS.
SEAS 2.5 TO 3.0 M IN SE TO S SWELL.

.12 HOUR FORECAST WITHIN 11N86W TO 11N87W TO 12N87W TO 11N88W TO
10N88W TO 11N86W...INCLUDING THE GULF OF PAPAGAYO... NE TO E
WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
.24 HOUR FORECAST WITHIN 11N86W TO 11N88W TO 11N90W TO 10N91W TO
11N89W TO 10N87W TO 11N86W...INCLUDING THE GULF OF PAPAGAYO...
NE TO E WINDS 20 TO 25 KT. SEAS TO 2.5 M IN MIXED E AND S SWELL.
.48 HOUR FORECAST WITHIN 11N86W TO 11N87W TO 10N88W TO 10N87W TO
11N87W TO 11N86W...INCLUDING THE GULF OF PAPAGAYO...NE TO E
WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.

.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.

CONVECTION VALID AT 1500 UTC TUE AUG 18...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 10.5N76W TO 08N95W. ITCZ FROM 10N98W TO
06.5N114W TO 10N128W THEN RESUMES NEAR 10N131W TO BEYOND
09N140W. SCATTERED MODERATE ISOLATED STRONG FROM 03.5N TO 14.5N
BETWEEN 77W AND 86W...FROM 08.5N TO 12.5N BETWEEN 86W AND 96W...
AND FROM 06N TO 15N BETWEEN 96.5W AND 106W. SCATTERED MODERATE
TO STRONG FROM 00N TO 12N BETWEEN 127W AND 140W. SCATTERED
MODERATE FROM 02.5N TO 13N BETWEEN 109W AND 126W.

.FORECASTER STRIPLING. NATIONAL HURRICANE CENTER.

$$