High Seas Forecast
Issued by NWS

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000
FZPN01 KWBC 171603
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1630 UTC THU AUG 17 2017

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

SECURITE

PACIFIC N OF 30N AND S OF 67N E OF A LINE FROM BERING STRAIT
TO 50N 160E

SYNOPSIS VALID 1200 UTC AUG 17.
24 HOUR FORECAST VALID 1200 UTC AUG 18.
48 HOUR FORECAST VALID 1200 UTC AUG 19.

.WARNINGS.

...GALE WARNING...
.POST-TROPICAL CYCLONE BANYAN 44N178E 1001 MB MOVING NE 15 KT.
WITHIN 240 NM OF LOW CENTER...EXCEPT 120 NM SW QUADRANT...WINDS
30 TO 45 KT. SEAS 11 TO 22 FT. ELSEWHERE WITHIN 360 NM N
SEMICIRCLE...AND 480 NM SE AND 660 NM SW QUADRANTS WINDS 20 TO
30 KT. SEAS 8 TO 16 FT.
.24 HOUR FORECAST POST-TROPICAL CYCLONE BANYAN 48N178W 1000 MB.
BETWEEN 240 NM AND 480 NM SE QUADRANTS WINDS 25 TO 40 KT. SEAS 8
TO 15 FT. ELSEWHERE WITHIN 300 NM NW...360 NM NE...780 NM SE AND
360 NM SW QUADRANTS WINDS TO 25 KT. SEAS 8 TO 13 FT.
.48 HOUR FORECAST POST-TROPICAL CYCLONE BANYAN 50N173W 1000 MB.
WITHIN 240 NM N SEMICIRCLE...AND 600 NM SW QUADRANTS WINDS 20 TO
30 KT. SEAS 8 TO 15 FT.

...GALE WARNING...
.FROM 35N TO 45N BETWEEN 123W AND 131W WINDS 20 TO 30 KT. SEAS
TO 12 FT.
.12 HOUR FORECAST FROM 40N TO 44N BETWEEN 124W AND 127W WINDS 25
TO 35 KT. SEAS TO 12 FT.
.24 HOUR FORECAST FROM 35N TO 46N BETWEEN 124W AND 132W WINDS 20
TO 30 KT. SEAS TO 11 FT.
.48 HOUR FORECAST FROM 33N TO 47N BETWEEN 123W AND 132W WINDS 20
TO 30 KT. SEAS 8 TO 13 FT.

...GALE WARNING...
.LOW 62N170W 996 MB MOVING SE 30 KT. BETWEEN 300 NM AND 660 NM
SE QUADRANT...AND BETWEEN 240 NM AND 540 NM SW QUADRANT WINDS 25
TO 35 KT. SEAS 8 TO 15 FT. ELSEWHERE WITHIN 1140 NM SE AND 780
NM SW QUADRANTS WINDS TO 25 KT. SEAS TO 10 FT.
.24 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DESCRIBED WITH
LOW 59N145W BELOW.

.SYNOPSIS AND FORECAST.

.BOGOSLOF VOLCANO AT 53.92N 168.03W IS CURRENTLY IN A HEIGHTENED
STATE OF UNREST. MARINERS TRAVELING IN THE VICINITY OF BOGOSLOF
VOLCANO ARE URGED TO EXERCISE CAUTION. IF MARINERS ENCOUNTER ANY
VOLCANIC ASH...REPORT THE OBSERVATION TO THE OCEAN PREDICTION
CENTER BY CALLING 301-683-1520.

.LOW 55N142W 1006 MB MOVING NE 15 KT. WITHIN 540 NM SE AND 780
NM SW QUADRANTS WINDS TO 25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST LOW DISSIPATED AND CONDITIONS DIMINISHED.

.LOW 59N153W 1001 MB MOVING E 10 KT. WINDS LESS THAN 25 KT. SEAS
LESS THAN 8 FT.
.24 HOUR FORECAST LOW 59N145W 1004 MB. WITHIN 840 NM S
SEMICIRCLE WINDS 20 TO 30 KT. SEAS TO 12 FT.
.48 HOUR FORECAST LOW 59N142W 1006 MB. WITHIN 420 NM S
SEMICIRCLE WINDS TO 25 KT. SEAS TO 9 FT.

.LOW 42N158W 1018 MB MOVING NE 10 KT. WITHIN 180 NM N
SEMICIRCLE...AND 240 NM SE AND 360 NM SW QUADRANTS WINDS TO 25
KT. SEAS TO 8 FT.
.24 HOUR FORECAST LOW 44N153W 1016 MB. WITHIN 180 NM N AND 360
NM S SEMICIRCLES WINDS TO 25 KT. SEAS TO 8 FT.
.48 HOUR FORECAST LOW 49N151W 1014 MB. WITHIN 420 NM SE QUADRANT
WINDS TO 25 KT. SEAS TO 8 FT.

.LOW 43N170E 1004 MB MOVING NE 20 KT. WITHIN 240 NM NW...360 NM
NE...240 NM SE AND 360 NM SW QUADRANTS WINDS 20 TO 30 KT. SEAS 8
TO 13 FT.
.24 HOUR FORECAST LOW AND CONDITIONS ABSORBED BY POST-TROPICAL
CYCLONE BANYAN IN WARNINGS SECTION ABOVE.

.24 HOUR FORECAST NEW LOW 38N176E 1006 MB. WITHIN 180 NM N
SEMICIRCLE...AND 240 NM SE AND 360 NM SW QUADRANTS WINDS 20 TO
30 KT. SEAS 8 TO 13 FT.
.48 HOUR FORECAST LOW 45N168W 1007 MB. WITHIN 360 NM S
SEMICIRCLE WINDS 20 TO 30 KT. SEAS TO 12 FT.

.48 HOUR FORECAST FROM 33N TO 45N W OF 165E WINDS TO 25 KT. SEAS
TO 8 FT.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 45N TO 50N
BETWEEN 131W AND 136W AND FROM 38N TO 43N BETWEEN 175W AND 177E.
.24 HOUR FORECAST DENSE FOG FROM 42N TO 45N BETWEEN 147W AND
152W AND FROM 40N TO 50N BETWEEN 167W AND 177W.
.48 HOUR FORECAST DENSE FOG FROM 45N TO 50N BETWEEN 144W AND
152W AND FROM 38N TO 50N BETWEEN 158W AND 168W.

.HIGH 40N140W 1027 MB NEARLY STATIONARY.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST HIGH 42N137W 1029 MB.

.HIGH 36N158W 1025 MB NEARLY STATIONARY.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST HIGH 34N163W 1022 MB.

.HIGH 47N169W 1024 MB MOVING SE 20 KT.
.24 HOUR FORECAST HIGH 45N159W 1022 MB.
.48 HOUR FORECAST HIGH DISSIPATED.

.HIGH 52N172E 1024 MB MOVING SW 20 KT.
.24 HOUR FORECAST HIGH DISSIPATED.

.48 HOUR FORECAST HIGH 44N171E 1024 MB.

.FORECASTER HOLLEY. 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 1200 UTC THU AUG 17.
24 HOUR FORECAST VALID 1200 UTC FRI AUG 18.
48 HOUR FORECAST VALID 1200 UTC SAT AUG 19.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW PRES 12N111W 1008 MB. WITHIN 90 NM NE SEMICIRCLE OF LOW E
TO SE WINDS 20 TO 25 KT. SEAS TO 9 FT.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
15.5N116.5W 1007 MB. WITHIN 120 NM NE SEMICIRCLE OF LOW NE TO E
WINDS 20 TO 25 KT. SEAS TO 10 FT.
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
16.5N122W 1007 MB. WITHIN 150 NM N SEMICIRCLE OF LOW NE TO E
WINDS 20 TO 25 KT. SEAS TO 10 FT. WITHIN 75 NM S SEMICIRCLE OF
LOW WINDS 20 KT OR LESS. SEAS TO 9 FT.

.S OF 02S BETWEEN 90W AND 110W WINDS 20 KT OR LESS. SEAS TO 8 FT
PRIMARILY IN SW SWELL.
.06 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.12 HOUR FORECAST WITHIN 30 NM OF LINE FROM 16N95W TO
14.5N95W...INCLUDING THE GULF OF TEHUANTEPEC...N WINDS 20 TO 25
KT. SEAS TO 8 FT.
.24 HOUR FORECAST LITTLE CHANGE.
.30 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.42 HOUR FORECAST WITHIN 30 NM OF LINE FROM 16N95W TO 15N95W...
INCLUDING THE GULF OF TEHUANTEPEC...N WINDS 20 TO 25 KT. SEAS
TO 8 FT.

.12 HOUR FORECAST WITHIN 30 NM OF LINE FROM 11N86W TO 10.5N88W...
INCLUDING THE GULF OF PAPAGAYO...NE WINDS 20 TO 25 KT. SEAS LESS
THAN 8 FT.
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

CONVECTION VALID AT 1500 UTC THU AUG 17...

.TROPICAL WAVE N OF 06N ALONG 90W...ISOLATED STRONG S OF 12N
WITHIN 60 NM OF WAVE.

.TROPICAL WAVE FROM 08N104W TO 20N107W...SCATTERED MODERATE
ISOLATED STRONG N OF 17N WITHIN 150 NM OF WAVE AND S OF 12N
WITHIN 90 NM W OF WAVE.

.LOW PRES 12N111W...SCATTERED STRONG WITHIN 180 NM W SEMICIRCLE
OF LOW.

.LOW PRES 16.5N121W 1009 MB...ISOLATED STRONG WITHIN 210 NM N
SEMICIRCLE.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 09N78W TO 09N90W TO 07N95W TO 14N105W
THROUGH LOW PRES 12N111W TO 15N129W TO 13N140W. SCATTERED
MODERATE ISOLATED STRONG WITHIN 90 NM OF LINES FROM 09N84W TO
09N88W AND FROM 06N92W TO 09N98W AND WITHIN 150 NM OF LINE FROM
13.5N116W TO 12N140W.

$$
.FORECASTER NELSON. NATIONAL HURRICANE CENTER.


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