High Seas Forecast
Issued by NWS

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000
FZPN01 KWBC 132242 CCA
HSFEP1

HIGH SEAS FORECAST
NWS OCEAN PREDICTION CENTER WASHINGTON DC
2230 UTC WED DEC 13 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

ONLY YOU KNOW THE WEATHER AT YOUR POSITION. REPORT IT TO THE
NATIONAL WEATHER SERVICE. EMAIL US AT
VOSOPS@NOAA.GOV(LOWERCASE).

SECURITE

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

SYNOPSIS VALID 1800 UTC DEC 13.
24 HOUR FORECAST VALID 1800 UTC DEC 14.
48 HOUR FORECAST VALID 1800 UTC DEC 15.

.WARNINGS.

...STORM WARNING...
.LOW 39N163E 999 MB MOVING NE 45 KT AND INTENSIFYING. OVER
FORECAST WATERS WITHIN 360 NM S AND SW QUADRANTS WINDS 20 TO 30
KT. SEAS 9 TO 15 FT.
.12 HOUR FORECAST LOW 42N177E 993 MB. FROM 38N TO 42N BETWEEN
179E AND 173E WINDS 25 TO 35 KT. SEAS 9 TO 16 FT.
.24 HOUR FORECAST LOW 47N173W 984 MB. FROM 42N TO 47N BETWEEN
170W AND 176W WINDS 25 TO 35 KT. SEAS 9 TO 15 FT.
.36 HOUR FORECAST LOW 53N166W 971 MB. WITHIN 180 NM SE
SEMICIRCLE WINDS 35 TO 50 KT. SEAS 15 TO 22 FT. ELSEWHERE FROM
48N TO 56N BETWEEN 159W AND 170W AND WITHIN 300 NM E OF A FRONT
FROM LOW TO 50N160W TO 40N161W WINDS 25 TO 40 KT. SEAS 10 TO 18
FT...EXCEPT IN BERING SEA 8 TO 14 FT.
.48 HOUR FORECAST LOW 57N168W 969 MB. FRONT TO EXTEND FROM LOW
TO 59N161W TO 53N150W. FROM 55N TO 61N BETWEEN 163W AND 172W AND
WITHIN 180 NM N AND E OF FRONT WINDS 25 TO 40 KT. SEAS 8 TO 17
FT.

...GALE WARNING...
.LOW 59N154W 992 MB MOVING NW 30 KT. FRONT EXTENDS FROM 60N149W
TO 59N144W TO 55N142W. OVER FORECAST WATERS BETWEEN THE FRONT
AND 132W WINDS 30 TO 40 KT. SEAS 12 TO 18 FT.
.24 HOUR FORECAST LOW 67N170W 994 MB. WITHIN 240 NM S QUADRANT
WINDS TO 25 KT. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST LOW AND CONDITIONS MOVED NW OF AREA.

...GALE WARNING...
.COMPLEX LOW WITH MAIN LOW 50N143W 1000 MB MOVING N 25 KT. FRONT
EXTENDS FROM 55N142W TO LOW CENTER TO 43N143W TO 35N142W TO
30N143W. WITHIN 300 NM E OF FRONT N OF 40N WINDS 25 TO 40 KT.
SEAS 14 TO 22 FT. ELSEWHERE BETWEEN THE FRONT AND 131W N OF 42N
AND WITHIN 300 NM E OF FRONT S OF 42N AND WITHIN 300 NM W OF
FRONT FROM 37N TO 43N WINDS 20 TO 30 KT. SEAS 9 TO 18 FT.
.24 HOUR FORECAST LOW 60N143W 996 MB. FRONT TO EXTEND FROM LOW
TO 48N133W. WITHIN 180 NM E OF FRONT FROM 52N TO 55N WINDS 25 TO
35 KT. SEAS 10 TO 15 FT. ELSEWHERE WITHIN 300 NM SE QUADRANT AND
WITHIN 240 NM E OF FRONT WINDS TO 25 KT. SEAS 9 TO 13 FT.
.48 HOUR FORECAST LOW MOVED INLAND AND ASSOCIATED CONDITIONS
DIMINISHED.

...GALE WARNING...
.COMPLEX LOW WITH MAIN CENTER NEAR 48N163E 979 MB MOVING NE 25
KT AND A SECOND LOW CENTER 52N163E 980 MB MOVING SE 10 KT. FRONT
EXTENDS FROM SECOND LOW TO 54N170E TO 54N178E TO 49N175W. OVER
FORECAST WATERS FROM 44N TO 48N W OF 167E WINDS 30 TO 45 KT.
SEAS 18 TO 27 FT. ALSO WITHIN 120 NM N OF FRONT W OF 178E WINDS
25 TO 40 KT. SEAS 9 TO 17 FT.
.24 HOUR FORECAST LOW 51N177E 974 MB. FRONT TO EXTEND FROM
56N177E TO 54N170W TO 37N160W. FROM 56N TO 59N W OF 174W AND
WITHIN 360 NM S SEMICIRCLE WINDS 25 TO 40 KT. SEAS 12 TO 23
FT...EXCEPT N OF 56N 8 TO 16 FT.
.48 HOUR FORECAST LOW 53N177W 969 MB. EXCEPT WHERE PREVIOUSLY
NOTED WITHIN 360 NM N AND NW AND 540 NM SW AND 780 NM S
QUADRANTS WINDS 30 TO 45 KT. SEAS 14 TO 22 FT.

...GALE WARNING...
.COMPLEX LOW WITH MAIN LOW 37N178E 1006 MB MOVING NE 30 KT.
FRONT EXTENDS FROM LOW TO 36N170E TO 32N160E. WITHIN 300 NM S
AND SE QUADRANTS AND WITHIN 120 NM SE OF FRONT N OF 30N WINDS 25
TO 35 KT. SEAS 9 TO 13 FT.
.24 HOUR FORECAST LOW AND ASSOCIATED CONDITIONS MERGED WITH NEW
LOW 39N175E BELOW.

...GALE WARNING...
.24 HOUR FORECAST NEW LOW 39N175E 995 MB. WITHIN 540 NM S
SEMICIRCLE WINDS 25 TO 40 KT. SEAS 10 TO 18 FT.
.48 HOUR FORECAST LOW 45N163W 992 MB. EXCEPT WHERE PREVIOUSLY
NOTED WITHIN 540 NM SE SEMICIRCLE WINDS 25 TO 40 KT. SEAS 12 TO
22 FT.

...GALE WARNING...
.24 HOUR FORECAST FROM 32N TO 43N BETWEEN 120W AND 127W AREA OF
N TO NW WINDS LESS THAN 25 KT. SEAS TO 9 FT.
.48 HOUR FORECAST FROM 36N TO 42N BETWEEN 123W AND 126W AREA OF
N TO NW WINDS 25 TO 35 KT. SEAS 10 TO 17 FT. ELSEWHERE E OF A
LINE FROM 43N127W TP 37N132W TO 30N133W WINDS 20 TO 30 KT. SEAS
8 TO 14 FT.

...HEAVY FREEZING SPRAY WARNING...
.MODERATE TO HEAVY FREEZING SPRAY OVER ICE FREE FORECAST WATERS
W AND NW OF A LINE FROM 60N175W TO 64N171W.
.24 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY NW OF A LINE
FROM 59N170W TO 63N165W.
.48 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY N OF 61N W OF
ALASKA.

.SYNOPSIS AND FORECAST.

.LOW 50N158W 992 MB MOVING NE 15 KT. WITHIN 300 NM W AND 360 NM
S AND SE QUADRANTS AND WITHIN 240 NM SW OF A LINE FROM LOW
CENTER TO 62N166W WINDS 20 TO 30 KT. SEAS 8 TO 15 FT...HIGHEST S
OF 47N.
.24 HOUR FORECAST LOW 53N150W 999 MB. WITHIN 360 NM S AND SE
QUADRANTS WINDS 20 TO 30 KT. SEAS 8 TO 14 FT.
.48 HOUR FORECAST LOW 58N139W 1012 MB. FROM 54N TO 58N E OF 141W
WINDS TO 25 KT. SEAS TO 11 FT.

.48 HOUR FORECAST FROM 30N TO 36N BETWEEN 140W AND 154W AREA OF
NE WINDS TO 25 KT. SEAS TO 11 FT.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 40N TO 57N
BETWEEN 134W AND 143W AND FROM 35N TO 40N BETWEEN 180W AND 171E.
.24 HOUR FORECAST DENSE FOG FROM 44N TO 52N BETWEEN 131W AND
134W...FROM 40N TO 47N BETWEEN 162W AND 172W AND WITHIN 90 NM OF
38N175W.
.48 HOUR FORECAST DENSE FOG WITHIN 360 NM SE OF A LINE FROM
54N153W TO 43N163W.

.HIGH 37N130W 1027 MB MOVING W 05 KT.
.24 HOUR FORECAST HIGH 37N133W 1026 MB.
.48 HOUR FORECAST HIGH DISSIPATED.

.24 HOUR FORECAST NEW HIGH 40N151W 1029 MB.
.48 HOUR FORECAST HIGH 41N138W 1036 MB.

.FORECASTER BANCROFT. 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 1800 UTC WED DEC 13.
24 HOUR FORECAST VALID 1800 UTC THU DEC 14.
48 HOUR FORECAST VALID 1800 UTC FRI DEC 15.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.WITHIN 45 NM OF LINE FROM 16N95W TO 14N95W TO 12.5N97W...
INCLUDING GULF OF TEHUANTEPEC...N TO NE WINDS 20 TO 30 KT. SEAS
8 TO 13 FT. ELSEWHERE FROM 08N TO 13N BETWEEN 94W AND 102W WINDS
20 KT OR LESS. SEAS TO 10 FT IN NE SWELL.
.18 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.FROM 10N TO 12N E OF 88W...INCLUDING GULF OF PAPAGAYO...NE
WINDS 20 TO 25 KT. SEAS TO 9 FT. FROM 08N TO 11N BETWEEN 88W AND
91W WINDS 20 KT OR LESS. SEAS TO 9 FT IN NE SWELL.
.24 HOUR FORECAST FROM 10N TO 12N E OF 88W...INCLUDING GULF OF
PAPAGAYO...NE WINDS 20 TO 25 KT. SEAS TO 9 FT. FROM 07N TO 10N
BETWEEN 88W AND 97W WINDS 20 KT OR LESS. SEAS TO 8 FT IN NE
SWELL.
.42 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.W OF LINE FROM 30N135W TO 22N140W AND S OF 21N W OF 120W WINDS
20 KT OR LESS. SEAS 8 TO 10 FT IN NW SWELL.
.24 HOUR FORECAST W OF LINE FROM 30N132W TO 15N140W WINDS 20 KT
OR LESS. SEAS 10 TO 13 FT IN NW SWELL...HIGHEST NEAR 30N140W.
ELSEWHERE W OF LINE FROM 30N121W TO 20N128W TO 18N119W TO
10N118W TO 05N140W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT
PRIMARILY IN NW SWELL.
.48 HOUR FORECAST FROM 15N TO 22N W OF 135W NE TO E WINDS 20 TO
25 KT. SEAS 10 TO 13 FT. ELSEWHERE W OF LINE FROM 30N116W TO
00N128W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT PRIMARILY IN NW
SWELL.

.GULF OF CALIFORNIA 30 HOUR FORECAST N OF 30N NW WINDS 20 TO 25
KT. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST N OF 29N NW WINDS 20 TO 25 KT. SEAS TO 8 FT.

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

CONVECTION VALID AT 2100 UTC WED DEC 13...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
ITCZ FROM 06N77W TO 05N96W TO 10N115W TO BEYOND 11N140W.
SCATTERED MODERATE ISOLATED STRONG FROM 08N TO 14N BETWEEN 114W
AND 127W.

$$
.FORECASTER AL. NATIONAL HURRICANE CENTER.


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