237
FZPN01 KWBC 180934
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1030 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC AUG 18.
24 HOUR FORECAST VALID 0600 UTC AUG 19.
48 HOUR FORECAST VALID 0600 UTC AUG 20.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.N OF A LINE FROM 56N147W TO 55N171W WINDS 20 TO 30 KT. SEAS TO
3.5 M.
.24 HOUR FORECAST N OF 63N BETWEEN 170W AND 165W WINDS TO 25 KT.
SEAS LESS THAN 2.5 M.
.48 HOUR FORECAST CONDITIONS DIMINISHED.

.LOW 51N159W 1015 MB MOVING NE 25 KT. WITHIN 300 NM E OF A LINE
FROM 52N156W TO LOW CENTER TO 41N167W WINDS 20 TO 30 KT. SEAS TO
3.5 M.
.24 HOUR FORECAST LOW 57N146W 1017 MB. WITHIN 360 NM SE OF A LINE
FROM 56N145W TO 51N165W TO 44N160W WINDS TO 25 KT. SEAS TO 3 M.
.48 HOUR FORECAST LOW DISSIPATED. ASSOCIATED CONDITIONS ABSORBED
BY LOW 57N147W DESCRIBED BELOW.

.LOW 52N171W 1007 MB MOVING NE 15 KT. FROM 47N TO 53N BETWEEN
176W AND 166W WINDS TO 25 KT. SEAS TO 3 M.
.24 HOUR FORECAST LOW 55N165W 1010 MB. WITHIN 180 NM OF CENTER
WINDS TO 25 KT. SEAS TO 2.5 M.
.48 HOUR FORECAST LOW 56N160W 1014 MB. ASSOCIATED CONDITIONS
DIMINISHED.

.FROM 30N TO 51N BETWEEN 116W AND 130W WINDS TO 25 KT. SEAS LESS
THAN 2.5 M.
.24 HOUR FORECAST FROM 30N TO 44N BETWEEN 117W AND 128W WINDS TO
25 KT. SEAS LESS THAN 2.5 M.
.48 HOUR FORECAST FROM 32N TO 51N BETWEEN 120W AND 130W WINDS 20
TO 30 KT. SEAS TO 2.5 M.

.48 HOUR FORECAST NEW LOW 57N147W 1014 MB. FROM 57N TO 61N
BETWEEN 136W AND 153W WINDS TO 25 KT. SEAS TO 2.5 M.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 47N TO 52N
BETWEEN 136W AND 162W.
.24 HOUR FORECAST DENSE FOG FROM 51N TO 56N BETWEEN 138W AND
151W...AND WITHIN 180 NM E OF A LINE FROM 43N161W TO 52N158W.
.48 HOUR FORECAST DENSE FOG FROM 46N TO 58N BETWEEN 155W AND
147W.

.FORECASTER BYRD. 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 0600 UTC TUE AUG 18.
24 HOUR FORECAST VALID 0600 UTC WED AUG 19.
48 HOUR FORECAST VALID 0600 UTC THU AUG 20.

.WARNINGS.

...GALE WARNING...
.WITHIN 16N94W TO 16N95W TO 15N96W TO 15N95W TO 15N94W TO
16N94W...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS 30 TO
35 KT. SEAS 2.5 TO 3.5 M. ELSEWHERE WITHIN 16N94W TO 16N96W TO
15N96W TO 14N96W TO 14N95W TO 14N94W TO 16N94W N TO NE WINDS 20
TO 30 KT. SEAS 2.5 TO 3.0 M.
.06 HOUR FORECAST LITTLE CHANGE...EXCEPT WINDS BELOW GALE FORCE.
.24 HOUR FORECAST WITHIN 16N94W TO 16N95W TO 16N96W TO 14N96W TO
14N95W TO 16N94W...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE
WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0 M.
.48 HOUR FORECAST LITTLE CHANGE.

.SYNOPSIS AND FORECAST.

.WITHIN 27N109W TO 29N112W TO 28N113W TO 24N110W TO 27N109W
...INCLUDING THE CENTRAL AND SOUTHERN GULF OF CALIFORNIA...E TO
SE WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M. SCATTERED TO NUMEROUS
TSTMS.
.09 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.24 HOUR FORECAST WITHIN 31N113W TO 31N114W TO 30N114W TO 29N113W
TO 30N113W TO 31N113W...INCLUDING THE NORTHERN GULF OF CALIFORNIA
...SE TO S WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
.30 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.

.WITHIN 29N115W TO 30N116W TO 29N116W TO 27N116W TO 27N115W TO
29N115W...INCLUDING NEAR SEBASTIAN VIZCAINO BAY AND NEAR PUNTA
EUGENIA...NW WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.
.03 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.

.WITHIN 11N86W TO 12N86W TO 11N88W TO 10N88W TO 10N87W 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 12N88W TO 11N91W TO 10N91W TO
09N90W TO 10N86W TO 11N86W...INCLUDING THE GULF OF PAPAGAYO...
NE TO E WINDS 20 TO 30 KT. SEAS 2.5 TO 3.0 M.
.48 HOUR FORECAST WITHIN 11N86W TO 11N89W TO 12N91W TO 11N93W TO
10N87W TO 11N86W...INCLUDING THE GULF OF PAPAGAYO...NE TO E
WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.

.WITHIN 01S92W TO 03N106W TO 00N113W TO 00N129W TO 03.4S120W TO
03.4S90W TO 01S92W WINDS 20 KT OR LESS. SEAS 2.5 TO 3.0 M IN SE
TO S SWELL.
.24 HOUR FORECAST WITHIN 02N102W TO 04N105W TO 02N112W TO
00N134W TO 03.4S120W TO 03.4S80W TO 02N102W...INCLUDING NEAR THE
GULF OF GUAYAQUIL AND EXCEPT LEE OF GALAPAGOS ISLANDS...WINDS 20
KT OR LESS. SEAS 2.5 TO 3.0 M IN MIXED SE AND SW SWELL.
.48 HOUR FORECAST LITTLE CHANGE.

.TROPICAL WAVE NEAR 100W. WITHIN 12N98W TO 12N99W TO 10N102W TO
09N102W TO 09N101W TO 10N99W TO 12N98W WINDS 20 TO 25 KT. SEAS
2.5 TO 3.0 M.
.18 HOUR FORECAST TROPICAL WAVE NEAR 105W. CONDITIONS IMPROVE.
WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.

.TROPICAL WAVE NEAR 127W. WITHIN 12N126W TO 14N128W TO 13N131W
TO 12N131W TO 10N128W TO 11N125W TO 12N126W E WINDS 20 TO 25 KT.
SEAS 2.5 TO 3.0 M.
.18 HOUR FORECAST TROPICAL WAVE NEAR 134W. CONDITIONS IMPROVE.
WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.

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

CONVECTION VALID AT 0730 UTC TUE AUG 18...

.TROPICAL WAVE NEAR 80W...SCATTERED TO NUMEROUS MODERATE
ISOLATED STRONG FROM 01N TO 11N BETWEEN 77W AND 91W.

.TROPICAL WAVE NEAR 100W...SCATTERED MODERATE ISOLATED STRONG
FROM 05N TO 10N BETWEEN 95W AND 100W.

.TROPICAL WAVE NEAR 127W...SCATTERED MODERATE ISOLATED STRONG
FROM 06N TO 14N BETWEEN 112W AND 140W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 09.5N84W TO 07N110W. ITCZ FROM 07N110W TO
08.5N125W THEN RESUMES FROM 09N131W TO BEYOND 09N140W.
SCATTERED MODERATE ISOLATED STRONG FROM 00N TO 06N BETWEEN 131W
AND 140W.


.FORECASTER LEWITSKY. NATIONAL HURRICANE CENTER.

$$