378
FZPN01 KWBC 202132
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2230 UTC THU AUG 20 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC AUG 20.
24 HOUR FORECAST VALID 1800 UTC AUG 21.
48 HOUR FORECAST VALID 1800 UTC AUG 22.

.WARNINGS.

...HURRICANE WARNING...
.48 HOUR FORECAST HURRICANE LALA NEAR 30.9N 172.8W. MAXIMUM
SUSTAINED WINDS 65 KT GUSTS 80 KT. TROPICAL STORM FORCE WINDS
WITHIN 140 NM NW AND SE QUADRANTS...160 NM NE QUADRANT AND 110 NM
SW QUADRANT. SEAS 4 M OR GREATER WITHIN 300 NM NE...240 NM
SE...180 NM SW...AND 270 NM NW QUADRANTS WITH SEAS TO 9 M.
ELSEWHERE S OF 40N W OF 165W WINDS 20 TO 33 KT. SEAS 2.5 TO 4 M.

.SYNOPSIS AND FORECAST.

.LOW 59N152W 1011 MB MOVING NW 10 KT. WITHIN 90 NM N OF A FRONT
FROM LOW CENTER TO 59N145W TO 57N136W WINDS 20 TO 30 KT. SEAS TO
3 M. ELSEWHERE WITHIN 180 NM EITHER SIDE OF A LINE FROM 55N143W
TO 44N154W WINDS TO 25 KT. SEAS TO 2.5 M.
.24 HOUR FORECAST LOW DISSIPATED INLAND AND CONDITIONS
DIMINISHED.

.FROM 43N TO 54N BETWEEN 125W AND 133W AREA OF N TO NW WINDS 20
TO 30 KT. SEAS TO 3 M.
.24 HOUR FORECAST FROM 44N TO 55N BETWEEN 126W AND 125W AREA OF N
TO NW WINDS TO 25 KT. SEAS TO 2.5 M.
.48 HOUR FORECAST CONDITIONS DIMINISHED.

.12 HOUR FORECAST COMPLEX LOW JUST NW OF AREA WITH MAIN CENTER
NEAR 63N176W 1002 MB. N OF 51N W OF 170W WINDS 20 TO 30 KT. SEAS
TO 3 M...HIGHEST NEAR 53N172E.
.24 HOUR FORECAST COMPLEX LOW WITH MEAN CENTER NEAR 63N171W 1000
MB. N OF 50N W OF 162W...EXCEPT WITHIN 480 NM SW QUADRANT...WINDS
20 TO 30 KT. SEAS TO 3 M...HIGHEST NEAR 54N174E.
.48 HOUR FORECAST COMPLEX LOW WITH MAIN CENTER NEAR 64N162W 1000
MB. WITHIN 300 NM W SEMICIRCLE WINDS 20 TO 30 KT. SEAS 2.5 TO 3.5
M. ELSEWHERE WITHIN 420 NM SW QUADRANT WINDS TO 25 KT. SEAS TO
2.5 M.

.48 HOUR FORECAST NEW LOW NEAR 59N158W 1006 MB. WITHIN 420 NM SE
AND 540 NM S QUADRANTS WINDS TO 25 KT. SEAS TO 2.5 M.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM WITHIN 120 NM OF S
ALASKA COAST BETWEEN 137W AND 155W...WITHIN 120 NM EITHER SIDE OF
A LINE FROM 59N141W TO 50N149W TO 42N159W...AND FROM 51N TO 63N W
OF 175W.
.24 HOUR FORECAST DENSE FOG WITHIN 120 NM EITHER SIDE OF A LINE
FROM 57N139W TO 39N160W...AND NW OF A LINE FROM 50N180W TO
52N165W TO 67N160W.
.48 HOUR FORECAST DENSE FOG WITHIN 60 NM EITHER SIDE OF A LINE
FROM 50N145W TO 45N151W...AND FROM 50N TO 55N W OF 180W.

.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 1800 UTC THU AUG 20.
24 HOUR FORECAST VALID 1800 UTC FRI AUG 21.
48 HOUR FORECAST VALID 1800 UTC SAT AUG 22.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.WITHIN 11N86W TO 11N87W TO 10N89W TO 10N88W TO 10N87W TO
11N86W...INCLUDING THE GULF OF PAPAGAYO... NE TO E WINDS 20 TO
25 KT. SEAS TO 2.5 M. ELSEWHERE WITHIN 10N87.5W TO 10N88.5W TO
10N89.5W TO 09.5N89W TO 09.5N88W TO 10N87.5W WINDS 20 KT OR LESS.
SEAS 2.5 M IN NE TO E SWELL.
.24 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.48 HOUR FORECAST LITTLE CHANGE.

.WITHIN 12N99W TO 11N100W TO 11N96W TO 09N94W TO 11N93W TO
12N99W E WINDS 20 TO 25 KT. SEAS TO 2.5 M IN E TO SE SWELL.
.24 HOUR FORECAST WITHIN 13N102W TO 13N103W TO 12N103W TO
10N102W TO 10N101W TO 12N101W TO 13N102W E TO SE WINDS 20 TO 25
KT. SEAS 2.5 M. WITHIN 13N100W TO 14N103W TO 12N103W TO 09N100W
TO 10N99W TO 13N100W WINDS 20 KT OR LESS. SEAS 2.5 M IN MIXED SE
SWELL.
.48 HOUR FORECAST WITHIN 12N106W TO 14N107W TO 14N108W TO
13N107W TO 09N109W TO 10N107W TO 12N106W SE TO S WINDS 20 TO 25
KT. SEAS 2.5 M IN SE TO S SWELL. ELSEWHERE WITHIN 16N105W TO
16N109W TO 06N111W TO 05N110W TO 10N107W TO 10N106W TO 16N105W
WINDS 20 KT OR LESS. SEAS 2.5 M IN SE TO S SWELL.

.WITHIN 11N112W TO 11N113W TO 11N114W TO 09N114W TO 09N113W TO
10N111W TO 11N112W E WINDS 20 TO 25 KT. SEAS 2.5 M.
.24 HOUR FORECAST WITHIN 12N114W TO 11N115W TO 10N116W TO
10N114W TO 11N113W TO 12N114W WINDS 20 KT OR LESS. SEAS 2.5 M IN
SE TO S SWELL.
.48 HOUR FORECAST WITHIN 14N116W TO 13N118W TO 13N117W TO
13N115W TO 14N116W E WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0 M IN SE
SWELL. ELSEWHERE WITHIN 09N114W TO 14N115W TO 13N119W TO 09N116W
TO 03N117W TO 07N112W TO 09N114W WINDS 20 KT OR LESS. SEAS 2.5 M
IN SE SWELL.

.WITHIN 16N94.5W TO 16N95W TO 15.5N95.5W TO 15N95.5W TO 15N95W
TO 15.5N94.5W TO 16N94.5W...INCLUDING THE GULF OF TEHUANTEPEC...
N TO NE WINDS 20 TO 25 KT. SEAS TO 2.5 M.
.24 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS
LESS THAN 2.5 M.
.48 HOUR FORECAST LITTLE CHANGE.

.WITHIN 01S105W TO 06N110W TO 00N113W TO 00N131W TO 03.4S115W TO
03.4S89W TO 01S105W WINDS 20 KT OR LESS. SEAS 2.5 M IN MIXED SE
AND S SWELL.
.24 HOUR FORECAST WITHIN 02N108W TO 02N114W TO 02S116W TO
01S111W TO 03.4S109W TO 02S105W TO 02N108W WINDS 20 KT OR LESS.
SEAS 2.5 M IN SE SWELL.
.48 HOUR FORECAST CONDITIONS TO MERGE WITH AREA OF WINDS AND
SEAS TO THE N AND DESCRIBED ABOVE.

.WITHIN 17.5N140W TO 16.5N140W TO 16.5N139W TO 17.5N140W WINDS
20 KT OR LESS. SEAS 2.5 M IN E TO SE SWELL.
.18 HOUR FORECAST 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 2030 UTC THU AUG 20...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 10N74.5W TO 08.5N87W TO 09N105W TO 1008 MB
LOW PRESSURE NEAR 08.5N113W TO 06N124W TO 07N140W. SCATTERED TO
NUMEROUS MODERATE TO STRONG CONVECTION FROM 03.5N TO 11.5N E OF
87W...FROM 06.5N TO 16.5N BETWEEN 92W AND 107W...AND FROM 04N TO
14N BETWEEN 109W AND 117W. SCATTERED MODERATE ISOLATED STRONG
CONVECTION FROM 06N TO 14N BETWEEN 87W AND 109W AND FROM 03N TO
11N BETWEEN 117W AND 137W. SCATTERED MODERATE CONVECTION FROM 13N
TO 17N BETWEEN 137W AND 140W.

.FORECASTER STRIPLING. NATIONAL HURRICANE CENTER.

$$