High Seas Forecast
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000
FZPN02 KWBC 211125
HSFEPI

HIGH SEAS FORECAST FOR METAREA XII
NWS OCEAN PREDICTION CENTER WASHINGTON DC
1145 UTC THU SEP 21 2017

CCODE/1:31:12:01:00/AOW+POR/NWS/CCODE
SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 21.
24 HOUR FORECAST VALID 0600 UTC SEP 22.
48 HOUR FORECAST VALID 0600 UTC SEP 23.

.WARNINGS.

...GALE WARNING...
.LOW 49N177W 990 MB MOVING E 10 KT. WITHIN 660 NM NE...720 NM
SE...300 NM SW...AND 600 NM NW QUADRANTS...AND WITHIN 240 NM NE
AND E OF A FRONT FROM 51N162W TO 46N161W TO 38N162W WINDS 25 TO
40 KT. SEAS 8 TO 16 FT.
.24 HOUR FORECAST LOW 50N170W 999 MB. WITHIN 780 NM N...720 NM
NE...300 NM SE...360 NM SW...AND 540 NM NW QUADRANTS WINDS 20 TO
30 KT. SEAS 8 TO 15 FT.
.48 HOUR FORECAST LOW 53N159W 997 MB. WITHIN 360 NM SE...300 NM
SW...AND 780 NM NW QUADRANTS WINDS 20 TO 30 KT. SEAS TO 12 FT.

...GALE WARNING...
.24 HOUR FORECAST NEW LOW 40N170E 1010 MB. WITHIN 240 NM SE AND
600 NM SW QUADRANTS WINDS TO 25 KT. SEAS TO 10 FT.
.48 HOUR FORECAST LOW 40N177W 1004 MB. WITHIN 420 NM SE AND 600
NM SW QUADRANTS WINDS 25 TO 35 KT. SEAS 8 TO 12 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.

.OVER FORECAST WATERS FROM 35N TO 56N BETWEEN 127W AND 139W AREA
OF N TO NW WINDS 20 TO 30 KT. SEAS 8 TO 14 FT.
.24 HOUR FORECAST FROM 36N TO 52N BETWEEN 127W AND 135W AREA OF
N TO NW WINDS TO 25 KT. SEAS 8 TO 12 FT.
.48 HOUR FORECAST FROM 35N TO 42N BETWEEN 124W AND 127W AREA OF
N WINDS TO 25 KT. SEAS TO 9 FT.

.LOW 38N169E 1011 MB MOVING E 25 KT. WITHIN 240 NM SE AND S
QUADRANTS WINDS TO 25 KT. SEAS TO 9 FT.
.24 HOUR FORECAST LOW 39N178W 1013 MB. WITHIN 180 NM SE OF A
FRONT TO EXTEND FROM LOW CENTER TO 35N178E WINDS TO 25 KT. SEAS
TO 10 FT.
.48 HOUR FORECAST LOW 41N166W 1010 MB. WITHIN 180 NM SE AND 360
NM SW QUADRANTS WINDS 20 TO 30 KT. SEAS TO 10 FT.

.24 HOUR FORECAST OVER FORECAST WATERS FROM 31N TO 36N BETWEEN
118W AND 123W AREA OF NW WINDS 20 TO 30 KT. SEAS TO 10 FT.
.48 HOUR FORECAST FROM 32N TO 36N BETWEEN 119W AND 122W AREA OF
NW WINDS TO 25 KT. SEAS TO 8 FT.

.24 HOUR FORECAST NEW LOW 57N159W 1000 MB. WITHIN 300 NM E AND
480 NM SE QUADRANTS...AND WITHIN 180 NM E OF A FRONT TO EXTEND
FROM 54N146W TO 41N158W WINDS 20 TO 30 KT. SEAS TO 10 FT.
.48 HOUR FORECAST LOW DISSIPATED. NEW LOW 54N141W 1012 MB.
WITHIN 240 NM SE AND E OF A FRONT TO EXTEND FROM LOW CENTER TO
39N158W AREA OF S TO SW WINDS TO 25 KT. SEAS TO 9 FT.

.24 HOUR FORECAST LOW W OF AREA 44N159E 1006 MB. OVER FORECAST
WATERS WITHIN 420 NM E AND 480 NM SE QUADRANTS WINDS TO 25 KT.
SEAS TO 9 FT.
.48 HOUR FORECAST LOW DISSIPATED AND ASSOCIATED CONDITIONS
DIMINISHED.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 42N TO 56N
BETWEEN 148W AND 179W.
.24 HOUR FORECAST DENSE FOG WITHIN 360 NM SE AND E OF A LINE
FROM 56N148W TO 42N160W.
.48 HOUR FORECAST DENSE FOG WITHIN 180 NM EITHER SIDE OF A LINE
FROM 55N145W TO 42N156W.

.HIGH 46N144W 1033 MB MOVING S 10 KT.
.24 HOUR FORECAST HIGH 42N144W 1032 MB.
.48 HOUR FORECAST HIGH 42N140W 1029 MB.

.HIGH 42N149W 1033 MB MOVING E 10 KT.
.24 HOUR FORECAST HIGH MERGED WITH HIGH 42N144W.

.24 HOUR FORECAST HIGH 33N171W 1022 MB.
.48 HOUR FORECAST HIGH DISSIPATED.

.FORECASTER BELL. 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 SEP 21.
24 HOUR FORECAST VALID 0600 UTC FRI SEP 22.
48 HOUR FORECAST VALID 0600 UTC SAT SEP 23.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.POST-TROPICAL REMNANT LOW NORMA NEAR 22N117W 1009 MB. WITHIN
120 NM W SEMICIRCLE WINDS 20 TO 25 KT. SEAS 8 FT.
.24 HOUR FORECAST LOW PRES NEAR 22N116W 1012 MB. WITHIN 90 NM W
SEMICIRCLE WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN NW SWELL.
.48 HOUR FORECAST LOW DISSIPATED. FROM 19N TO 21N BETWEEN 115W
AND 117W WINDS 20 KT OR LESS. SEAS 8 FT IN MERGING SE AND NW
SWELL.

.POST-TROPICAL REMNANT LOW OTIS NEAR 16N132W 1012 MB. WITHIN 180
NM NW SEMICIRCLE N TO NE WINDS 20 TO 25 KT. SEAS 8 TO 9 FT.
.24 HOUR FORECAST LOW DISSIPATED. FROM 16N TO 20N BETWEEN 133W
AND 137W WINDS 20 KT OR LESS. SEAS TO 8 FT IN MIXED SWELL.
.30 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.N OF LINE FROM 30N117W TO 25N120W TO 18N130W TO 18N140W WINDS
20 KT OR LESS. SEAS 8 TO 10 FT IN NW SWELL.
.24 HOUR FORECAST...EXCEPT AS NOTED ABOVE...N OF 19N BETWEEN
115W AND 124W WINDS 20 KT OR LESS. SEAS TO 9 FT IN NW SWELL.
.48 HOUR FORECAST N OF 27N BETWEEN 116W AND 122W WINDS 20 KT OR
LESS. SEAS 8 TO 9 FT IN NW SWELL.

.FROM 11N TO 13N BETWEEN 99W AND 104W WINDS 20 KT OR LESS. SEAS
8 FT IN SE SWELL AND S WIND WAVES.
.09 HOUR FORECAST FROM 11N TO 15N BETWEEN 99W AND 106W WINDS 20
KT OR LESS. SEAS 8 FT IN SE SWELL. WITHIN 45 NM EITHER SIDE OF
LINE FROM 10N111W TO 08N114W TO 08N117W WINDS 20 KT OR LESS.
SEAS 8 FT IN MIXED SWELL.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
16N102W 1007 MB. FROM 11N TO 15N BETWEEN 99W AND 105W SW WINDS
20 TO 25 KT. SEAS 8 TO 9 FT.
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR
17N105W 1006 MB. WITHIN 150 NM EITHER SIDE OF LINE FROM 17N105W
TO 13N103W TO TO 10N112W TO 07N122W WINDS S TO SW WINDS 20 TO 25
KT. SEAS 8 TO 10 FT.

.GULF OF CALIFORNIA N OF 30N SW WINDS 20 TO 25 KT. SEAS LESS
THAN 8 FT.
.24 HOUR FORECAST GULF OF CALIFORNIA LITTLE CHANGE.
.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 0900 UTC THU SEP 21...

INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

MONSOON TROUGH FROM 09N79W TO 11N86W TO LOW PRES NEAR 15N96W
1010 MB TO 16N102W TO 13N116W TO 11N122W TO 11N130W TO LOW PRES
NEAR 12N136W 1012 MB TO 13N140W. SCATTERED TO NUMEROUS STRONG
WITHIN 180 NM N OF TROUGH BETWEEN 99W AND 105W. SCATTERED
MODERATE ISOLATED STRONG WITHIN 270 NM S OF TROUGH E OF 94W...
WITHIN 210 NM S OF TROUGH BETWEEN 105W AND 116W...WITHIN 180 NM
S OF TROUGH BETWEEN 120W AND 123W...WITHIN 90 NM S OF TROUGH
BETWEEN 128W AND 129W... AND WITHIN 240 NM S OF TROUGH W OF 131W.

.FORECASTER MT. NATIONAL HURRICANE CENTER.

NATIONAL WEATHER SERVICE HONOLULU HI
NORTH PACIFIC EQUATOR TO 30N BETWEEN 140W AND 160E

SYNOPSIS VALID 0600 UTC SEP 21 2017.
24 HOUR FORECAST VALID 0600 UTC SEP 22 2017.
48 HOUR FORECAST VALID 0600 UTC SEP 23 2017.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.LOW 13N158W 1011 MB MOVING W SLOWLY. SCATTERED MODERATE TSTMS
WITHIN 120 NM NE QUADRANT...AND ELSEWHERE WITHIN 60 NM...OF LOW.
.24 HOUR FORECAST LOW 13N160W 1011 MB. WINDS 20 TO 25 KT WITHIN
180 NM N AND NE QUADRANTS OF LOW.
.48 HOUR FORECAST LOW DISSIPATED. WINDS DIMINISHED TO 20 KT OR
LESS.

.FRONT FROM 30N170W TO 23N176E TO 22N161E NEARLY STATIONARY.
ISOLATED MODERATE TSTMS WITHIN 60 NM N OF FRONT W OF 178E.
.24 HOUR FORECAST WEAKENING FRONT FROM 30N172W TO 24N177E TO
23N163E.
.48 HOUR FORECAST FRONT WEAKENED TO TROUGH FROM 30N174W TO
24N174E.

.TROUGH FROM 11N167E TO 04N160E MOVING W 15 KT. SCATTERED
MODERATE TO STRONG TSTMS WITHIN 240 NM OF TROUGH.
.24 HOUR FORECAST TROUGH MOVED W OF FORECAST AREA.

.TROUGH FROM 16N169W TO 09N173W MOVING W 10 KT. ISOLATED
MODERATE TSTMS FROM 11N TO 16N BETWEEN 168W AND 177W.
.24 HOUR FORECAST TROUGH DISSIPATED.

.HIGH 30N175E 1019 MB MOVING ENE 25 KT. RIDGE FROM 28N160E TO
HIGH MOVING N SLOWLY.
.24 HOUR FORECAST HIGH MOVED N OF FORECAST AREA.

.RIDGE FROM 30N163W TO 25N172W MOVING N SLOWLY.

.OTHERWISE...WINDS 20 KT OR LESS OVER REMAINDER OF FORECAST
AREA.

.SEAS 8 TO 9 FT FROM 21N TO 28N BETWEEN 179W AND 163E.
.24 HOUR FORECAST SEAS SUBSIDED TO 8 FT OR LOWER.

.OTHERWISE...SEAS 8 FT OR LOWER OVER REMAINDER OF FORECAST AREA.

.ISOLATED MODERATE TSTMS FROM 02N TO 10N BETWEEN 177E AND 170E.

.MONSOON TROUGH FROM 13N140W TO 13N150W TO 12N154W TO LOW TO
09N163W. SEE TSTMS ASSOCIATED WITH LOW ABOVE. ISOLATED MODERATE
TSTMS ELSEWHERE WITHIN 150 NM OF MONSOON TROUGH.

$$

.FORECASTER HOUSTON. HONOLULU HI.


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