High Seas Forecast
Issued by NWS

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830
FZPN01 KWBC 221610
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1630 UTC FRI SEP 22 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 SEP 22.
24 HOUR FORECAST VALID 1200 UTC SEP 23.
48 HOUR FORECAST VALID 1200 UTC SEP 24.

.WARNINGS.

...GALE WARNING...
.LOW 50N168W 999 MB MOVING NE 25 KT. FROM 44N TO 50N BETWEEN
163W AND 173W...AND WITHIN 660 NM N AND 480 NM W QUADRANTS...AND
N OF 59N BETWEEN 162W AND 173W WINDS 20 TO 30 KT. SEAS TO 13 FT.
.24 HOUR FORECAST LOW 55N157W 996 MB. N OF 50N BETWEEN 159W AND
170W...ALSO WITHIN 300 NM S AND 240 NM SE QUADRANTS...AND
BETWEEN 240 NM AND 480 NM NE QUADRANT...ALSO WITHIN 240 NM SE OF
A LINE FROM 52N142W TO 48N148W TO 44N152W TO 42N160W WINDS 20 TO
30 KT. SEAS TO 10 FT.
.36 HOUR FORECAST LOW 57N153W 994 MB. WITHIN 120 NM NE OF A LINE
FROM 60N150W TO 58N143W WINDS 25 TO 35 KT. SEAS TO 9 FT.
.48 HOUR FORECAST LOW 58N149W 994 MB. WITHIN 300 NM S AND SE
SEMICIRCLES WINDS 20 TO 30 KT. SEAS TO 10 FT.

.SYNOPSIS AND FORECAST.

.LOW 59N155W 998 MB MOVING NE 10 KT. FRONT EXTENDS FROM CENTER
TO 60N146W TO 56N137W. WITHIN 300 NM SE SEMICIRCLE AND WITHIN
120 NM N AND NE OF FRONT WINDS 20 TO 30 KT. SEAS TO 10 FT.
ELSEWHERE WITHIN 180 NM S AND SE OF A FRONT FROM 53N140W TO
49N150W TO 46N156W TO 41N160W WINDS TO 25 KT. SEAS TO 9 FT.
.24 HOUR FORECAST LOW DISSIPATED WITH CONDITIONS DESCRIBED WITH
LOW 55N157W.

.LOW 40N175W 1011 MB MOVING NE 25 KT. FROM 35N TO 40N BETWEEN
171W AND 178W WINDS 20 TO 30 KT. SEAS TO 11 FT.
.24 HOUR FORECAST LOW 42N160W 1011 MB. WITHIN 300 NM S OF A LINE
FROM 42N160W TO 40N170W WINDS 20 TO 30 KT. SEAS TO 12 FT.
.48 HOUR FORECAST LOW 48N146W 1003 MB. FRONT WILL EXTEND FROM
CENTER TO 45N153W TO 42N160W. WITHIN 360 NM S AND SE
QUADRANTS...ALSO WITHIN 300 NM S AND SE OF FRONT WINDS 20 TO 30
KT. SEAS TO 12 FT.

.LOW 40N173E 1009 MB MOVING E 15 KT. WITHIN 420 NM S...300 NM
SE...120 NM NE AND 120 NM N QUADRANTS WINDS TO 25 KT. SEAS TO 10
FT.
.24 HOUR FORECAST LOW 40N178W 1003 MB. WITHIN 300 NM S OF A LINE
FROM 40N170W TO 36N180W...ALSO BETWEEN 35N AND 42N BETWEEN 177W
AND 177E WINDS 20 TO 30 KT. SEAS TO 11 FT.
.48 HOUR FORECAST LOW 43N161W 1003 MB. WITHIN 4200 NM S OF A
LINE FROM 43N160W TO 41N168W WINDS TO 25 KT. SEAS TO 10 FT.

.WITHIN 240 NM W AND SW OF A LINE FROM 44N128W TO 40N126W TO
33N118W WINDS TO 25 KT. SEAS TO 11 FT.
.24 HOUR FORECAST FROM 34N TO 42N BETWEEN 124W AND 128W WINDS TO
25 KT. SEAS TO 10 FT.
.48 HOUR FORECAST FROM 34N TO 43N BETWEEN 124W AND 128W WINDS 20
TO 30 KT. SEAS TO 10 FT.

.LOW 42N161E 1006 MB MOVING E 20 KT. WITHIN 240 NM N SEMICIRCLE
AND 420 NM S AND SW QUADRANTS WINDS 20 TO 30 KT. SEAS TO 11 FT.
.24 HOUR FORECAST LOW DISSIPATED WITH CONDITIONS DIMINISHED.

.48 HOUR FORECAST LOW 60N162W 996 MB. WITHIN 300 NM W SEMICIRCLE
WINDS 20 TO 30 KT. SEAS TO 9 FT.

.48 HOUR FORECAST LOW 34N156E 1010 MB W OF AREA. FROM 33N TO 39N
W OF 165E WINDS TO 25 KT. SEAS TO 8 FT.

.48 HOUR FORECAST LOW 41N168W 1004 MB. FROM 36N TO 45N BETWEEN
166W AND 175W WINDS TO 25 KT. SEAS TO 9 FT.

.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.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM WITHIN 420 NM S AND
SE OF A LINE FROM 53N142W TO 52N152W TO 46N160W.
.24 HOUR FORECAST DENSE FOG WITHIN 300 NM SE OF A LINE FROM
55N146W TO 50N150W TO 44N154W TO 42N163W.
.48 HOUR FORECAST DENSE FOG WITHIN 240 NM SE OF A LINE FROM
50N144W TO 42N161W.

.HIGH 42N144W 1031 MB MOVING E 5 KT.
.24 HOUR FORECAST HIGH 41N139W 1026 MB.
.48 HOUR FORECAST HIGH 41N135W 1025 MB.

.HIGH 58N175E 1025 MB MOVING S 10 KT.
.24 HOUR FORECAST HIGH 55N175E 1024 MB.
.48 HOUR FORECAST HIGH 50N170E 1024 MB.

.48 HOUR FORECAST HIGH 46N164E 1026 MB.

.FORECASTER SHAW. 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 FRI SEP 22.
24 HOUR FORECAST VALID 1200 UTC SAT SEP 23.
48 HOUR FORECAST VALID 1200 UTC SUN SEP 24.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW PRES NEAR 17N104W 1007 MB. WITHIN 120 NM SE QUADRANT SW
WINDS 20 TO 25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
18N105W 1006 MB. WITHIN 90 NM S SEMICIRCLE WINDS 20 TO 25 KT.
SEAS TO 8 FT.
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
18.5N105.5W 1005 MB. WITHIN 90 NM S SEMICIRCLE WINDS 20 TO 25
KT. SEAS TO 8 FT.

.FROM 10N TO 13N BETWEEN 109W AND 122W SW TO W WINDS 20 TO 25
KT. SEAS TO 9 FT.
.24 HOUR FORECAST FROM 09N TO 13N BETWEEN 100W AND 122W SW WINDS
20 TO 25 KT. SEAS 8 TO 9 FT.
.48 HOUR FORECAST FROM 09N TO 14N BETWEEN 98W AND 114W SW TO W
WINDS 20 TO 25 KT. SEAS 8 TO 9 FT.

.N OF 29N BETWEEN 118W AND 122W WINDS 20 KT OR LESS. SEAS 8 FT
IN NW SWELL.
.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 FRI SEP 22...

INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

MONSOON TROUGH FROM 08N78W TO 16N100W TO LOW PRES NEAR 17N104W
1007 MB TO 12N120W TO 10N140W. SCATTERED MODERATE TO STRONG
WITHIN 60 NM OF LINE FROM 08N89W TO 13N95W. SCATTERED MODERATE
ISOLATED STRONG WITHIN 75 NM S OF TROUGH E OF 83W. SCATTERED
MODERATE WITHIN 90 NM S OF TROUGH BETWEEN 112W AND 133W.

$$
.FORECASTER MUNDELL. NATIONAL HURRICANE CENTER.



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