High Seas Forecast
Issued by NWS

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000
FZPN01 KWBC 201036 CCA
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1030 UTC WED SEP 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

SECURITE

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

SYNOPSIS VALID 0600 UTC SEP 20.
24 HOUR FORECAST VALID 0600 UTC SEP 21.
48 HOUR FORECAST VALID 0600 UTC SEP 22.

.WARNINGS.

...STORM WARNING...
.LOW 47N177W 990 MB MOVING NE 05 KT. WITHIN 90 NM NW OF A LINE
FROM 51N176W TO 47N180W WINDS 40 TO 50 KT. SEAS 16 TO 22 FT.
ELSEWHERE WITHIN 660 NM NE...300 NM W...AND 360 NM NW
QUADRANTS...AND WITHIN 240 NM NE AND E OF A FRONT FROM 51N174W
TO 46N69W TO 40N167W TO 33N169W WINDS 25 TO 40 KT. SEAS 9 TO 18
FT.
.24 HOUR FORECAST LOW 48N176W 990 MB. WITHIN 840 NM NE...660 NM
SE...360 NM SW...AND 420 NM NW QUADRANTS...AND WITHIN 300 NM NW
OF A LINE FROM 57N166W TO 52N180W WINDS 25 TO 35 KT. SEAS 9 TO
17 FT.
.48 HOUR FORECAST LOW 50N170W 997 MB. WITHIN 360 NM SE
SEMICIRCLE AND 360 NM W OF A LINE FROM 60N164W TO 53N172W WINDS
25 TO 35 KT. SEAS 9 TO 17 FT.

...GALE WARNING...
.LOW 39N177W 997 MB MOVING NE 25 KT. WITHIN 300 NM SW SEMICIRCLE
WINDS 25 TO 35 KT. SEAS 9 TO 16 FT.
.24 HOUR FORECAST ABSORBED BY LOW 48N176W DESCRIBED ABOVE.

.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 49N127W 1004 MB MOVING SE 10 KT. WITHIN 660 NM SW AND 720
NM NW QUADRANTS WINDS 20 TO 30 KT. SEAS 9 TO 14 FT.
.24 HOUR FORECAST LOW DISSIPATED. NEW LOW 47N124W 1006 MB. FROM
38N TO 56N BETWEEN 127W AND 138W WINDS 20 TO 30 KT. SEAS 8 TO 12
FT.
.48 HOUR FORECAST LOW DISSIPATED. FROM 36N TO 53N BETWEEN 127W
AND 133W WINDS TO 25 KT. SEAS TO 11 FT.

.OVER FORECAST WATERS FROM 31N TO 38N BETWEEN 119W AND 125W AREA
OF NW WINDS 20 TO 30 KT. SEAS 8 TO 12 FT.
.24 HOUR FORECAST FROM 31N TO 39N BETWEEN 119W AND 125W AREA OF
NW WINDS TO 25 KT. SEAS TO 11 FT.
.48 HOUR FORECAST WITHIN 240 NM E OF A LINE FROM 38N127W TO
31N122W AREA OF NW WINDS 20 TO 30 KT. SEAS TO 11 FT.

.OVER FORECAST WATERS N OF 59N BETWEEN ALASKA AND 172W WINDS TO
25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST CONDITIONS DIMINISHED.

.LOW 40N162E 1008 MB MOVING SE 15 KT. OVER FORECAST WATERS
WITHIN 660 NM N AND 360 NM S QUADRANTS WINDS TO 25 KT. SEAS 9 TO
12 FT.
.24 HOUR FORECAST LOW 38N171E 1011 MB. WITHIN 240 NM SE AND 360
NM SW QUADRANTS WINDS TO 25 KT. SEAS TO 10 FT.
.48 HOUR FORECAST LOW 39N177W 1014 MB. WITHIN 180 NM SE AND 300
NM SW QUADRANTS WINDS TO 25 KT. SEAS TO 10 FT.

.48 HOUR FORECAST NEW LOW 39N172E 1010 MB. WITHIN 420 NM SE AND
480 NM SW QUADRANTS WINDS 20 TO 30 KT. SEAS TO 11 FT.

.48 HOUR FORECAST NEW LOW 59N147W 1009 MB. FRONT TO EXTEND FROM
57N143W TO 51N151W TO 4N159W. WITHIN 90 NM N SEMICIRCLE AND 240
NM E OF THE FRONT WINDS 20 TO 30 KT. SEAS TO 11 FT.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 38N TO 51N
BETWEEN 149W AND 175W.
.24 HOUR FORECAST DENSE FOG FROM 42N TO 56N BETWEEN 148W AND
174W.
.48 HOUR FORECAST DENSE FOG FROM 42N TO 57N BETWEEN 141W AND
160W.

.HIGH 52N152W 1027 MB MOVING SE 20 KT.
.24 HOUR FORECAST HIGH 44N145W 1033 MB.
.48 HOUR FORECAST HIGH 43N144W 1032 MB.

.HIGH 39N149W 1031 MB MOVING N 10 KT.
.24 HOUR FORECAST HIGH 43N149W 1033 MB.
.48 HOUR FORECAST HIGH MERGED WITH HIGH 43N144W ABOVE.

.HIGH 54N169E 1021 MB MOVING NW 10 KT.
.24 HOUR FORECAST HIGH DISSIPATED.

.HIGH 30N164E 1018 MB MOVING E 15 KT.
.24 HOUR FORECAST HIGH 30N172E 1019 MB.
.48 HOUR FORECAST HIGH 30N178W 1021 MB.

.FORECASTER BELL. OCEAN PREDICTION CENTER.

NATIONAL HURRICANE CENTER MIAMI FL-CORRECTED

E PACIFIC FROM THE EQUATOR TO 30N E OF 140W AND 03.4S TO THE
EQUATOR E OF 120W

SYNOPSIS VALID 0600 UTC WED SEP 20.
24 HOUR FORECAST VALID 0600 UTC THU SEP 21.
48 HOUR FORECAST VALID 0600 UTC FRI SEP 22.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.POST-TROPICAL REMNANT LOW NORMA NEAR 22N 116W 1008 MB. WITHIN
120 NM NW AND 75 NM SW QUADRANTS WINDS 20 TO 25 KT. SEAS 8 FT.
.09 HOUR FORECAST LOW PRES NEAR 22N117W 1010 MB. WITHIN 75 NM W
SEMICIRCLE WINDS 20 KT. SEAS 8 FT IN SE SWELL.
.24 HOUR FORECAST LOW DISSIPATED. FROM 22N TO 25N BETWEEN 117W
AND 120W WINDS 20 KT OR LESS. SEAS 8 FT IN MIXED SE AND NW SWELL.
.48 HOUR FORECAST CONDITIONS TO MERGE WITH AREA OF NW SWELL
IN FOURTH PARAGRAPH.

.POST-TROPICAL REMNANT LOW OTIS NEAR 18N 130W 1012 MB. WITHIN 90
NM NW QUADRANT WINDS 20 TO 25 KT. SEAS 8 TO 9 FT.
.06 HOUR FORECAST LOW PRES NEAR 18N 131W 1013 MB. WITHIN 150 NM
NW AND 120 NM SW QUADRANTS WINDS 20 KT OR LESS. SEAS 8 TO 9 FT
IN SE SWELL.
.24 HOUR FORECAST DISSIPATED. CONDITIONS TO MERGE WITH AREA OF
NW SWELL IN FOURTH PARAGRAPH.

.FROM 04N TO 10N BETWEEN 105W AND 118W WINDS 20 KT OR LESS. SEAS
8 FT IN MIXED SE SWELL AND S WIND WAVES.
.24 HOUR FORECAST FROM 03N TO 07N BETWEEN 118W AND 121W WINDS 20
KT OR LESS. SEAS 8 FT IN MIXED SE AND NW SWELL.
.48 HOUR FORECAST WITHIN 150 NM EITHER SIDE LINE FROM 12N100W TO
09N111W 07N119W TO 07N130W S TO SW WINDS 20 TO 25 KT. SEAS 8 FT
IN MIXED SWELL.

.N OF LINE FROM 30N117W TO TO 27N128W TO 20N127W TO 14N135W TO
14N140W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN NW SWELL.
.24 HOUR FORECAST N OF LINE FROM 30N119W TO 22N117W TO 16N130W
TO 16N140W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN NW SWELL.
.48 HOUR FORECAST N OF LINE FROM 30N118W TO 22N116W TO 15N126W
TO 15N140W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED NW
AND SE SWELL.

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

CONVECTION VALID AT 0900 UTC WED SEP 20...

.POST-TROPICAL CYCLONE NORMA...ISOLATED LIGHT TO MODERATE WITHIN
90 NM S SEMICIRCLE.

.TROPICAL WAVE ALONG 95W/96W S OF 18N...SCATTERED MODERATE TO
STRONG FROM 14N TO 17N BETWEEN 96W AND 101W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 09N78W TO 10N86W TO 14N96W TO 12N109W TO
12N115W TO 11N124W TO 14N134W TO 13N140W. SCATTERED MODERATE
ISOLATED STRONG WITHIN 390 NM S OF TROUGH E OF 90W, WITHIN 90 NM
N OF TROUGH BETWEEN 86W AND TROPICAL WAVE, WITHIN 210 NM S OF
TROUGH BETWEEN TROPICAL WAVE AND 95W, AND WITHIN 240 NM S OF
TROUGH BETWEEN 100W AND 110W.

$$
.FORECASTER MT. NATIONAL HURRICANE CENTER.



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