High Seas Forecast
Issued by NWS

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000
FZPN01 KWBC 170407
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0430 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0000 UTC AUG 17.
24 HOUR FORECAST VALID 0000 UTC AUG 18.
48 HOUR FORECAST VALID 0000 UTC AUG 19.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM BANYAN NEAR 40.1N 173.6E MOVING NE OR 045 DEG AT
35 KT. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 70 KT. TROPICAL STORM
FORCE WINDS WITHIN 90 NM SE AND 150 NM NE QUADRANTS...AND 90 NM W
SEMICIRCLE. SEAS 12 FT OR GREATER WITHIN 90 NM N SEMICIRCLE...AND
240 NM SW QUADRANT WITH SEAS TO 26 FT. ELSEWHERE FROM 33N TO 42N
BETWEEN 178E AND 166E WINDS 20 TO 33 KT. SEAS 8 TO 12 FT.
.24 HOUR FORECAST POST-TROPICAL CYCLONE BANYAN 47N179W 1002 MB.
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. WITHIN 120 NM N OF A
LINE FROM 44N171W TO 47N180W WINDS 25 TO 35 KT. SEAS 9 TO 16 FT.
ELSEWHERE WITHIN 300 NM NE...AND 840 NM S AND SE QUADRANTS WINDS
20 TO 30 KT. SEAS 8 TO 14 FT.
.48 HOUR FORECAST POST-TROPICAL CYCLONE BANYAN 49N176W 998 MB.
WITHIN 300 NM SE...420 NM SW...AND 180 NM N AND NW QUADRANTS
WINDS 20 TO 30 KT. SEAS 8 TO 12 FT.

...GALE WARNING...
.OVER FORECAST WATERS FROM 41N TO 43N E OF 126W AREA OF N TO NW
WINDS 25 TO 35 KT. SEAS 9 TO 15 FT. ELSEWHERE 36N TO 45N BETWEEN
124W AND 131W AREA OF N TO NW WINDS TO 25 KT. SEAS 8 TO 13 FT.
.24 HOUR FORECAST FROM 41N TO 43N BETWEEN 124W AND 126W AREA OF N
WINDS 25 TO 35 KT. SEAS 8 TO 14 FT. ELSEWHERE FROM 35N TO 46N
BETWEEN 124W AND 132W AREA OF N WINDS TO 25 KT. SEAS TO 11 FT.
.48 HOUR FORECAST FROM 40N TO 43N BETWEEN 124W AND 126W AREA OF
N WINDS 25 TO 35 KT. SEAS 8 TO 15 FT. ELSEWHERE FROM 34N TO 45N
BETWEEN 124W AND 131W AREA OF N WINDS 20 TO 30 KT. SEAS 8 TO 13
FT.

...GALE WARNING...
.LOW NW OF AREA 64N176W 994 MB MOVING SE 20 KT. BETWEEN 240 NM
AND 600 NM S AND SE QUADRANTS WINDS 25 TO 35 KT. SEAS 8 TO 14 FT.
ELSEWHERE WITHIN 420 NM S AND SW OF A LINE FROM 61N177W TO
55N153W WINDS 20 TO 30 KT. SEAS 8 TO 12 FT.
.24 HOUR FORECAST LOW 59N165W 1001 MB. WITHIN 600 NM SE AND 420
NM SW QUADRANT WINDS 20 TO 30 KT. SEAS 8 TO 14 FT.
.48 HOUR FORECAST LOW MOVED INLAND OVER ALASKA WITH ASSOCIATED
CONDITIONS DIMINISHED.

...GALE WARNING...
.LOW 42N168E 1002 MB MOVING NE 15 KT. WITHIN 540 NM E AND NE...
AND 300 NM N AND NW QUADRANTS WINDS 25 TO 35 KT. SEAS 9 TO 15
FT. ELSEWHERE WITHIN 600 NM E AND NE...AND 420 NM N AND NW
QUADRANTS WINDS 20 TO 30 KT. SEAS 8 TO 13 FT.
.24 HOUR FORECAST LOW 45N174E 1003 MB. EXCEPT WHERE DESCRIBED
WITH POST-TROPICAL CYCLONE BANYAN ABOVE...WITHIN 240 NM N AND NW
SEMICIRCLES WINDS 20 TO 30 KT. SEAS 8 TO 15 FT.
.48 HOUR FORECAST LOW ABSORBED BY POST-TROPICAL CYCLONE BANYAN
DESCRIBED ABOVE.

...GALE WARNING...
.FRONT EXTENDS FROM 49N141W TO 44N157W. WITHIN 180 NM E AND SE
OF FRONT AREA OF SW WINDS TO 25 KT. SEAS TO 9 FT.
.12 HOUR FORECAST NEW LOW 51N138W 1012 MB. WITHIN 180 NM S AND
SE QUADRANTS WINDS 25 TO 35 KT. SEAS 8 TO 12 FT.
.24 HOUR FORECAST LOW 55N132W 1009 MB. WITHIN 300 NM SE...600 NM
S AND SW...AND 180 NM W AND NW QUADRANTS WINDS 20 TO 30 KT. SEAS
TO 11 FT.
.48 HOUR FORECAST LOW MOVED INLAND AND DISSIPATED WITH
CONDITIONS DIMINISHED.

...GALE WARNING...
.36 HOUR FORECAST NEW LOW 44N174W 1005 MB. WITHIN 240 NM S AND
SE QUADRANTS WINDS 25 TO 35 KT. SEAS 8 TO 12 FT.
.48 HOUR FORECAST LOW 48N166W 1002 MB. WITHIN 180 NM NE AND 240
NM SE QUADRANTS WINDS 25 TO 35 KT. SEAS 8 TO 15 FT. ELSEWHERE
WITHIN 240 NM NE...300 NM SE...AND 180 NM SW QUADRANTS WINDS 20
TO 30 KT. SEAS TO 11 FT.

.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 42N165W 1015 MB MOVING E 10 KT WILL TURN NE AFTER 24 HOURS.
WITHIN 120 NM OF LOW CENTER WINDS TO 25 KT. SEAS TO 9 FT.
.24 HOUR FORECAST LOW 42N155W 1014 MB. WITHIN 180 NM N
SEMICIRCLE AND 240 NM S AND SE QUADRANTS WINDS 20 TO 30 KT. SEAS
TO 10 FT.
.48 HOUR FORECAST LOW 45N154W 1017 MB. WITHIN 240 NM E AND SE
QUADRANTS WINDS TO 25 KT. SEAS TO 8 FT.

.LOW 40N174W 1016 MB MOVING E 15 KT. WITHIN 180 NM N SEMICIRCLE
WINDS TO 25 KT. SEAS TO 9 FT.
.24 HOUR FORECAST LOW 39N165W 1017 MB. WINDS LESS THAN 25 KT.
SEAS LESS THAN 8 FT.
.48 HOUR FORECAST LOW DISSIPATED.

.24 HOUR FORECAST NEW COMPLEX LOW WITH MEAN CENTER 58N143W 1003
MB. BETWEEN 120 NM AND 420 NM S AND SE...AND BETWEEN 180 NM AND
660 NM S AND SW QUADRANTS WINDS 20 TO 30 KT. SEAS 8 TO 12 FT.
.48 HOUR FORECAST LOW 60N146W 1007 MB. BETWEEN 180 NM AND 540 NM
S QUADRANT WINDS TO 25 KT. SEAS TO 10 FT.

.48 HOUR FORECAST NEW LOW 42N174W 1010 MB. WITHIN 240 NM SE AND
360 NM S AND SW QUADRANTS WINDS 20 TO 30 KT. SEAS 8 TO 12 FT.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM WITHIN 360 NM N OF
A LINE FROM 46N145W TO 36N169W TO 39N168E.
.24 HOUR FORECAST DENSE FOG WITHIN 360 NM OF 43N175W.
.48 HOUR FORECAST DENSE FOG WITHIN 180 NM OF 45N150W AND
54N174E...AND FROM 37N TO 51N BETWEEN 164W AND 175W.

.HIGH 40N143W 1031 MB MOVING E 10 KT WILL TURN AFTER 24 HOURS.
.24 HOUR FORECAST HIGH 41N138W 1027 MB.
.48 HOUR FORECAST HIGH 43N138W 1029 MB.

.HIGH 50N180W 1027 MB MOVING SE 30 KT WILL SLOW AFTER 24 HOURS.
.24 HOUR FORECAST HIGH 45N162W 1025 MB.
.48 HOUR FORECAST HIGH 42N157W 1023 MB.

.24 HOUR FORECAST NEW HIGH 35N161W 1024 MB.
.48 HOUR FORECAST HIGH 34N165W 1023 MB.

.48 HOUR FORECAST NEW HIGH 33N170W 1022 MB.

.48 HOUR FORECAST HIGH 44N163E 1021 MB.

.FORECASTER MILLS. 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 THU AUG 17.
24 HOUR FORECAST VALID 0000 UTC FRI AUG 18.
48 HOUR FORECAST VALID 0000 UTC SAT AUG 19.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW PRES NEAR 17N118W 1009 MB. WITHIN 120 NM NE QUADRANT
OF LOW CENTER WINDS 20 TO 25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST LOW PRES NEAR 16N123W 1010 MB. WITHIN 120 NM
NE QUADRANT OF LOW CENTER WINDS 20 TO 25 KT. SEAS TO 8 FT.
.48 HOUR FORECAST LOW PRES NEAR 15N128W 1010 MB. WITHIN 240 NM
NW QUADRANT OF LOW CENTER WINDS 20 TO 25 KT. SEAS TO 8 FT.

.LOW PRES NEAR 11N108W 1009 MB. WITHIN 90 NM E SEMICIRCLE OF LOW
CENTER WINDS 20 TO 25 KT. SEAS 8 TO 10 FT.
.24 HOUR FORECAST LOW PRES NEAR 13N113W 1009 MB. WITHIN 150 NM
NE SEMICIRCLE OF LOW CENTER WINDS 20 TO 25 KT. SEAS TO 8 FT.
ELSEWHERE FROM 09N TO 15N BETWEEN 110W AND 114W WINDS 20 KT OR
LESS. SEAS TO 8 FT PRIMARILY IN SW SWELL.
.48 HOUR FORECAST LOW PRES NEAR 14N118W 1008 MB. WITHIN 180 NM
NE SEMICIRCLE OF LOW CENTER WINDS 20 TO 25 KT. SEAS TO 9 FT.

.S OF LINE FROM 03.4S100W TO 01S110W TO 03.4SN120W WINDS 20 KT
OR LESS. SEAS TO 8 FT PRIMARILY IN SW SWELL. FROM 07N TO 11N
BETWEEN 105W AND 110W...AND FROM 06N TO 08N BETWEEN 110W AND
114W WINDS 20 KT OR LESS. SEAS 8 FT IN SW SWELL.
.24 HOUR FORECAST CONDITIONS MERGED WITH LOW PRES NEAR 13N113W.

.30 HOUR FORECAST N OF 15N BETWEEN 94.5W AND 95.5W...INCLUDING
THE GULF OF TEHUANTEPEC...N WINDS 20 TO 25 KT. SEAS LESS THAN 8
FT.
.36 HOUR FORECAST N OF 14.5N BETWEEN 94.5W AND 95.5W...INCLUDING
THE GULF OF TEHUANTEPEC...N WINDS 20 TO 25 KT. SEAS TO 8 FT.
.48 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.30 HOUR FORECAST FROM 10.5N TO 12N E OF 88W...INCLUDING THE
GULF OF PAPAGAYO...NE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.36 HOUR FORECAST LITTLE CHANGE.
.48 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 0200 UTC THU AUG 17...

.TROPICAL WAVE N OF 10 ALONG 87W. SCATTERED MODERATE FROM 12N TO
14N BETWEEN 86W AND 88W.

.TROPICAL WAVE N OF 10N ALONG 103W...SCATTERED MODERATE FROM 09N
TO 17N BETWEEN 100W AND 106W.

.LOW PRES NEAR 11N108W 1009 MB...NUMEROUS MODERATE WITHIN 45 NM
OF CENTER. SCATTERED MODERATE ELSEWHERE FROM 07N TO 12N BETWEEN
106W AND 111W.

.LOW PRES NEAR 17N118W 1009 MB...SCATTERED MODERATE WITHIN 45 NM
W SEMICIRCLE.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM 10N85W TO 08N91W TO 12N103W TO A
1009 MB LOW PRESSURE NEAR 11N108W TO 13N124W TO 11N135W TO
13N140W. SCATTERED MODERATE ISOLATED STRONG IS FROM 09N TO 12N
BETWEEN 111W AND 119W...NEAR 11N123W...AND WITHIN 120 NM S OF
THE MONSOON TROUGH BETWEEN 130W AND 135W.

$$
.FORECASTER GR. NATIONAL HURRICANE CENTER.



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