High Seas Forecast
Issued by NWS

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000
FZPN01 KWBC 201549
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1630 UTC SUN AUG 20 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

PAN PAN

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

SYNOPSIS VALID 1200 UTC AUG 20.
24 HOUR FORECAST VALID 1200 UTC AUG 21.
48 HOUR FORECAST VALID 1200 UTC AUG 22.

.WARNINGS.

...GALE WARNING...
.FROM 34N TO 45N BETWEEN 124W AND 131W WINDS 25 TO 35 KT. SEAS 9
TO 17 FT.
.24 HOUR FORECAST FROM 32N TO 44N BETWEEN 124W AND 131W WINDS 25
TO 35 KT. SEAS 8 TO 14 FT.
.48 HOUR FORECAST CONDITIONS DIMINISHED.

...GALE WARNING...
.LOW 42N163E 1000 MB MOVING NE 10 KT. WITHIN 300 NM N AND 600 NM
E AND SE QUADRANTS WINDS 25 TO 35 KT. SEAS 8 TO 14 FT.
.24 HOUR FORECAST LOW 45N165E 998 MB. WITHIN 300 NM W AND N
SEMICIRCLES...AND WITHIN 360 NM E OF A FRONT FROM 45N175E TO
31N162E WINDS 20 TO 30 KT. SEAS TO 12 FT.
.48 HOUR FORECAST LOW 52N170E 994 MB. WITHIN 300 NM N...660 NM
E...720 NM S...AND 360 NM W QUADRANTS WINDS 25 TO 35 KT. SEAS TO
12 FT.

...GALE WARNING...
.LOW 54N154W 998 MB MOVING NE 10 KT. WITHIN 720 NM S SEMICIRCLE
AND 540 NM NW AND 300 NM NE QUADRANTS WINDS 20 TO 30 KT. SEAS TO
11 FT.
.24 HOUR FORECAST LOW 59N150W 993 MB. WITHIN 180 NM N AND 660 NM
W QUADRANTS WINDS 25 TO 35 KT. SEAS TO 12 FT. ELSEWHERE WITHIN
840 NM S AND SE QUADRANTS WINDS 20 TO 30 KT. SEAS TO 10 FT.
.48 HOUR FORECAST LOW 55N145W 1000 MB. WITHIN 180 NM OF LOW
EXCEPT 540 NM S AND SW QUADRANTS WINDS 25 TO 35 KT. SEAS 8 TO 16
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.

.FROM 51N TO 54N E OF 136W WINDS TO 25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST CONDITIONS DIMINISHED.

.24 HOUR FORECAST N OF 61N W OF 167W WINDS TO 25 KT. SEAS LESS
THAN 8 FT.
.48 HOUR FORECAST CONDITIONS DIMINISHED.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM WITHIN 360 NM OF
48N148W AND FROM 51N TO 56N BETWEEN 177W AN 168E.
.24 HOUR FORECAST DENSE FOG WITHIN 180 NM EITHER SIDE OF A LINE
FROM 54N133W TO 44N146W...FROM 40N TO 47N BETWEEN 178W AND
166E...AND WITHIN 240 NM OF 55N177E.
.48 HOUR FORECAST DENSE FOG WITHIN 120 NM OF 52N131W AND 360 NM
EITHER SIDE OF A LINE FROM 55N174E TO 44N174W.

.HIGH 40N138W 1029 MB MOVING S 10 KT.
.24 HOUR FORECAST HIGH 37N139W 1026 MB.
.48 HOUR FORECAST HIGH 35N143W 1025 MB.

.HIGH 59N177W 1021 MB MOVING SE 20 KT.
.24 HOUR FORECAST HIGH 52N170W 1027 MB.
.48 HOUR FORECAST HIGH DISSIPATED.

.HIGH 42N177W 1025 MB MOVING NE 10 KT.
.24 HOUR FORECAST HIGH 43N171W 1028 MB.
.48 HOUR FORECAST HIGH 43N163W 1030 MB.

.HIGH 49N173E 1022 MB MOVING E 10 KT.
.24 HOUR FORECAST HIGH DISSIPATED.

.HIGH 34N173W 1023 MB NEARLY STATIONARY.
.24 HOUR FORECAST HIGH DISSIPATED.

.48 HOUR FORECAST HIGH 38N162E 1021 MB.

.FORECASTER COLLINS. 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 SUN AUG 20.
24 HOUR FORECAST VALID 1200 UTC MON AUG 21.
48 HOUR FORECAST VALID 1200 UTC TUE AUG 22.

.WARNINGS.

...HURRICANE WARNING...
.HURRICANE KENNETH NEAR 16.3N 127.4W 990 MB AT 1500 UTC AUG 20
MOVING W OR 280 DEG AT 13 KT. MAXIMUM SUSTAINED WINDS 65 KT
GUSTS 80 KT. TROPICAL STORM FORCE WINDS WITHIN 60 NM NW AND SE
QUADRANTS...70 NM NE AND 40 NM SW QUADRANTS. SEAS 12 FT OR
GREATER WITHIN 150 NM N SEMICIRCLE...75 NM SE AND 45 NM SW
QUADRANTS WITH SEAS TO 24 FT. ELSEWHERE WITHIN 300 NM N AND 150
NM S SEMICIRCLES WINDS 20 TO 33 KT. SEAS 8 TO 11 FT.
.24 HOUR FORECAST HURRICANE KENNETH NEAR 17.8N 131.0W. MAXIMUM
SUSTAINED WINDS 75 KT GUSTS 90 KT. TROPICAL STORM FORCE WINDS
WITHIN 70 NM NW AND SE QUADRANTS...80 NM NE AND 50 NM SW
QUADRANTS. SEAS 12 FT OR GREATER WITHIN 180 NM NW AND 120 NM SE
SEMICIRCLES WITH SEAS TO 30 FT. ELSEWHERE WITHIN 330 NM NW AND
180 NM SE SEMICIRCLES WINDS 20 TO 33 KT. SEAS 8 TO 11 FT.
.48 HOUR FORECAST HURRICANE KENNETH NEAR 20.4N 133.4W. MAXIMUM
SUSTAINED WINDS 70 KT GUSTS 85 KT. TROPICAL STORM FORCE WINDS
WITHIN 90 NM NE...70 NM SE...50 NM SW AND 80 NM NW QUADRANTS.
SEAS 12 FT OR GREATER WITHIN 240 NM NW AND 120 NM SE SEMICIRCLES
WITH SEAS TO 30 FT. ELSEWHERE WITHIN 300 NM NW AND 240 NM SE
SEMICIRCLES WINDS 20 TO 33 KT. SEAS 8 TO 11 FT.
.72 HOUR FORECAST TROPICAL STORM KENNETH NEAR 23.7N 134.8W.
MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST TROPICAL STORM KENNETH NEAR 26.7N 136.3W.
MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT.
.120 HOUR FORECAST POST-TROPICAL REMNANT LOW KENNETH NEAR 28.0N
137.0W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.

FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE
USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE
AND INTENSITY.

.SYNOPSIS AND FORECAST.

.24 HOUR FORECAST N OF 29N BETWEEN 125W AND 132W WINDS 20 KT OR
LESS. SEAS TO 8 FT IN N SWELL.
.48 HOUR FORECAST ELSEWHERE N OF 24N BETWEEN 128W AND 140W WINDS
20 KT OR LESS. SEAS TO 9 FT IN N SWELL.

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

CONVECTION VALID AT 1500 UTC SUN AUG 20...

.HURRICANE KENNETH...NUMEROUS STRONG WITHIN 75 NM OF CENTER.
SCATTERED MODERATE TO STRONG ELSEWHERE WITHIN 120 NM OF LINE
FROM 18N128W TO 12.5N127W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 10N85W TO 11N92W TO 10.5N90W TO LOW PRES
08N116W TO 09N119W...RESUMES FROM 14N130W TO 11.5N140W.
SCATTERED MODERATE TO STRONG WITHIN 150 NM OF LINE FROM 07N77W
TO 08N88W TO 13N92W. SCATTERED MODERATE ISOLATED STRONG WITHIN
120 NM OF LINE FROM 07N90W TO 09N98W TO 09N110W AND WITHIN 90 NM
OF 09.5N125W.

$$
.FORECASTER NELSON. NATIONAL HURRICANE CENTER.


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