High Seas Forecast
Issued by NWS

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000
FZPN01 KWBC 170940
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1030 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 0600 UTC AUG 17.
24 HOUR FORECAST VALID 0600 UTC AUG 18.
48 HOUR FORECAST VALID 0600 UTC AUG 19.

.WARNINGS.

...GALE WARNING...
.POST-TROPICAL CYCLONE BANYAN 43N177E 996 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 420 NM NE...360
NM SE...540 NM S AND SW...AND 300 NM N AND NW QUADRANTS WINDS 20
TO 30 KT. SEAS 8 TO 16 FT.
.24 HOUR FORECAST POST-TROPICAL CYCLONE BANYAN 48N179W 1000 MB.
WITHIN 120 NM N AND NW QUADRANTS WINDS 25 TO 35 KT. SEAS 8 TO 14
FT. ELSEWHERE FROM 44N TO 51N BETWEEN 168W AND 175E WINDS 20 TO
30 KT. SEAS TO 12 FT.
.48 HOUR FORECAST POST-TROPICAL CYCLONE BANYAN 50N175W 998 MB.
WITHIN 360 NM S AND SW SEMICIRCLES WINDS 20 TO 30 KT. SEAS 8 TO
15 FT.

...GALE WARNING...
.OVER FORECAST WATERS FROM 41N TO 43N E OF 126W AREA OF N WINDS
25 TO 35 KT. SEAS 8 TO 14 FT. ELSEWHERE FROM 35N TO 45N BETWEEN
124W AND 132W AREA OF N WINDS TO 25 KT. SEAS TO 11 FT.
.24 HOUR FORECAST FROM 36N TO 45N BETWEEN 124W AND 132W AREA OF N
WINDS 20 TO 30 KT. SEAS 8 TO 14 FT.
.48 HOUR FORECAST FROM 39N TO 43N BETWEEN 124W AND 127W AREA OF N
WINDS 25 TO 35 KT. SEAS 8 TO 14 FT. ELSEWHERE FROM 33N TO 45N
BETWEEN 124W AND 131W AREA OF N WINDS TO 25 KT. SEAS TO 11 FT.

...GALE WARNING...
.LOW 62N172W 994 MB MOVING SE 25 KT. BETWEEN 180 NM AND 720 NM E
AND SE QUADRANTS...AND BETWEEN 120 NM AND 540 NM SW QUADRANT
WINDS 25 TO 35 KT. SEAS 9 TO 15 FT. ELSEWHERE WITHIN 420 NM N OF
A LINE FROM 48N151W TO 55N171E WINDS 20 TO 30 KT. SEAS 8 TO 13
FT.
.24 HOUR FORECAST LOW 59N152W 1003 MB. BETWEEN 180 NM AND 600 NM
S QUADRANT...AND BETWEEN 240 NM AND 660 NM W AND SW QUADRANTS
WINDS 20 TO 30 KT. SEAS TO 12 FT.
.48 HOUR FORECAST LOW MOVED INLAND OVER ALASKA WITH ASSOCIATED
CONDITIONS DESCRIBED WITH LOW 58N144W BELOW.

...GALE WARNING...
.FRONT EXTENDS FROM 50N138W TO 43N154W. WITHIN 180 NM E AND SE OF
FRONT AREA OF SW WINDS TO 25 KT. SEAS TO 9 FT.
.12 HOUR FORECAST NEW LOW 54N133W 1008 MB. WITHIN 120 NM NE...AND
180 NM S AND SE QUADRANTS WINDS 25 TO 35 KT. SEAS TO 12 FT.
.24 HOUR FORECAST LOW 57N136W 1003 MB. WITHIN 180 NM SE AND 540
NM SW QUADRANTS WINDS TO 25 KT. SEAS 10 FT.
.48 HOUR FORECAST LOW 58N144W 1006 MB. WITHIN 360 NM S AND SE
SEMICIRCLES WINDS TO 25 KT. SEAS TO 8 FT.

...GALE WARNING...
.24 HOUR FORECAST NEW LOW 41N178W 1008 MB. WITHIN 300 NM E
SEMICIRCLE...AND WITHIN 540 NM S AND SW QUADRANTS WINDS 20 TO 30
KT. SEAS TO 11 FT.
.36 HOUR FORECAST LOW 46N170W 1003 MB. WITHIN 240 NM SE QUADRANT
WINDS 25 TO 35 KT. SEAS 8 TO 13 FT.
.48 HOUR FORECAST LOW 49N164W 1001 MB. WITHIN 180 NM NE AND 300
NM SE QUADRANTS WINDS 25 TO 35 KT. SEAS 8 TO 13 FT. ELSEWHERE
FROM 39N TO 52N BETWEEN 158W AND 169W WINDS TO 25 KT. SEAS TO 10
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 42N163W 1016 MB MOVING NE 10 KT. WITHIN 180 NM OF LOW CENTER
WINDS TO 25 KT. SEAS TO 9 FT.
.24 HOUR FORECAST LOW 43N154W 1015 MB. WITHIN 180 NM OF LOW
CENTER WINDS TO 25 KT. SEAS TO 9 FT.
.48 HOUR FORECAST LOW 46N153W 1017 MB. WITHIN 240 NM SE QUADRANT
WINDS TO 25 KT. SEAS TO 8 FT.

.48 HOUR FORECAST FROM 36N TO 41N BETWEEN 163E AND 160E AREA OF
SE WINDS TO 25 KT. SEAS TO 8 FT.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM WITHIN 180 NM OF
46N146W AND 39N179W...AND ALSO WITHIN 120 NM EITHER SIDE OF A
LINE FROM 43N157W TO 38N169W.
.24 HOUR FORECAST DENSE FOG WITHIN 240 NM OF 44N175W.
.48 HOUR FORECAST DENSE FOG WITHIN 180 NM OF 47N149W AND FROM 37N
TO 49N BETWEEN 161W AND 170W.

.HIGH 40N142W 1028 MB MOVING NE 10 KT.
.24 HOUR FORECAST HIGH 42N139W 1029 MB.
.48 HOUR FORECAST HIGH 43N138W 1030 MB.

.HIGH 36N157W 1026 MB WILL REMAIN STATIONARY THROUGH 48 HOURS.

.HIGH 33N177W 1021 MB MOVING NE 10 KT WILL BECOME STATIONARY
AFTER 24 HOURS.
.24 HOUR FORECAST LOW 34N170W 1022 MB.
.48 HOUR FORECAST LITTLE CHANGE.

.HIGH 47N172W 1025 MB MOVING SE 15 KT.
.24 HOUR FORECAST HIGH 46N159W 1024 MB.
.48 HOUR FORECAST HIGH DISSIPATED.

.HIGH 52N171E 1022 MB DRIFTING SW.
.24 HOUR FORECAST HIGH DISSIPATED.

.48 HOUR FORECAST HIGH 43N169E 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 0600 UTC THU AUG 17.
24 HOUR FORECAST VALID 0600 UTC FRI AUG 18.
48 HOUR FORECAST VALID 0600 UTC SAT AUG 19.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW PRES NEAR 12N111W 1009 MB. WITHIN 120 NM NE SEMICIRCLE OF
LOW WINDS 20 TO 25 KT. SEAS 8 TO 10 FT.
.24 HOUR FORECAST LOW PRES NEAR 15N115W 1009 MB. WITHIN 150 NM
NE SEMICIRCLE OF LOW WINDS 20 TO 25 KT. SEAS 8 TO 10 FT.
ELSEWHERE FROM 12N TO 15N BETWEEN 112W AND 115W 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 WINDS 20 TO 25 KT. SEAS 8 TO 10 FT.

.LOW PRES NEAR 17N121W 1009 MB. WITHIN 120 NM NE QUADRANT OF LOW
WINDS 20 TO 25 KT. SEAS 8 FT.
.24 HOUR FORECAST LOW PRES NEAR 16N125W 1010 MB. WITHIN 120 NM
NE QUADRANT OF LOW WINDS 20 KT OR LESS. SEAS TO 8 FT.
.48 HOUR FORECAST LOW PRES NEAR 16N129W 1010 MB. WINDS 20 KT OR
LESS. SEAS LESS THAN 8 FT.

.S OF 02S BETWEEN 107W AND 114W 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.

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

.24 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.
.30 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 0830 UTC THU AUG 17...

.TROPICAL WAVE FROM 11N105W TO 18N105W...SCATTERED MODERATE
ISOLATED STRONG FROM 07N TO 10N BETWEEN 100W AND 105W AND FROM
16N TO 19N BETWEEN 105W TO 108W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 10N74W TO 08N81W TO LOW PRES 1008 MB NEAR
09N86W TO 12N104W TO LOW PRES 1009 MB NEAR 12N111W TO 14N125W TO
12N135W TO 14N140W. SCATTERED MODERATE ISOLATED STRONG FROM 09N
TO 15N BETWEEN 109W AND 119W AND FROM 09N TO 14N BETWEEN 130W
AND 138W.

$$
.FORECASTER MCELROY. NATIONAL HURRICANE CENTER.



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