North Pacific High Seas Forecast

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FZPN01 KWBC 142254 CCB
HSFEP1

HIGH SEAS FORECAST 
NWS OCEAN PREDICTION CENTER WASHINGTON DC 
2230 UTC THU DEC 14 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS 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 14. 
24 HOUR FORECAST VALID 1800 UTC DEC 15. 
48 HOUR FORECAST VALID 1800 UTC DEC 16. 

.WARNINGS.

...STORM WARNING...
.COMPLEX LOW WITH MAIN LOW CENTER NEAR 50N175E 974 MB MOVING NE 
20 KT NEXT 12 HOURS THEN TURNING N AND THEN AFTER 24 HOURS 
TURNING MORE E. WITHIN 180 NM SE AND 360 NM S AND SW QUADRANTS 
WINDS 25 TO 40 KT. SEAS 11 TO 22 FT.
.24 HOUR FORECAST LOW 55N177W 967 MB. WITHIN 480 NM S AND 240 NM 
W QUADRANTS WINDS 30 TO 45 KT. SEAS 15 TO 25 FT...EXCEPT N OF 
ALEUTIAN ISLANDS 12 TO 21 FT. ELSEWHERE WITHIN 360 NM N AND NW 
QUADRANTS AND FROM 44N TO 54N BETWEEN 168W AND 172E WINDS 25 TO 
40 KT. SEAS 12 TO 21 FT...EXCEPT N OF ALEUTIAN ISLANDS 9 TO 15 
FT.
.36 HOUR FORECAST LOW 54N170W 974 MB. FROM 47N TO 52N BETWEEN 
167W AND 179W WINDS 40 TO 50 KT. SEAS 18 TO 30 FT. ELSEWHERE 
FROM 44N TO 54N BETWEEN 160W AND 177E AND WITHIN 420 NM W 
QUADRANT WINDS 25 TO 40 KT. SEAS 13 TO 24 FT.
.48 HOUR FORECAST LOW 56N162W 978 MB. WITHIN 660 NM S AND 420 NM 
SE QUADRANTS WINDS 30 TO 45 KT. SEAS 15 TO 32 FT.

...STORM WARNING...
.36 HOUR FORECAST NEW LOW 59N150W 984 MB. FRONT TO EXTEND FROM 
LOW TO 54N134W. OVER FORECAST WATERS N OF FRONT WINDS 35 TO 50 
KT. SEAS 12 TO 21 FT.
.48 HOUR FORECAST LOW 61N148W 978 MB. FRONT TO EXTEND FROM LOW 
TO 59N140W TO 50N131W. WITHIN 480 NM S QUADRANT AND WITHIN 120 
NM NE OF FRONT WINDS 25 TO 40 KT. SEAS 9 TO 18 FT.

...GALE WARNING...
.LOW 53N174E 972 MB MOVING SE 15 KT THEN TURNING MORE E AFTER 12 
HOURS. OVER FORECAST WATERS BETWEEN 180 NM AND 480 NM W QUADRANT 
AND WITHIN 420 NM N QUADRANT AND FROM 56N TO 59N W OF 172W WINDS 
25 TO 40 KT. SEAS 8 TO 17 FT.
.24 HOUR FORECAST LOW AND ASSOCIATED CONDITIONS MERGED WITH LOW 
55N177W DESCRIBED ABOVE.

...GALE WARNING... 
.LOW 59N144W 987 MB MOVING NW 15 KT. WITHIN 120 NM NE 
SEMICIRCLE...180 NM S AND 300 NM SE QUADRANTS WINDS 25 TO 35 KT. 
SEAS 9 TO 20 FT...HIGHEST NEAR 58N139W.
.24 HOUR FORECAST LOW DISSIPATED INLAND AND CONDITIONS AS 
DESCRIBED WITH LOW 54N150W IN SYNOPSIS AND FORECAST.

...GALE WARNING...
.LOW 52N177W 978 MB MOVING NE 20 KT NEXT 12 HOURS THEN TURNING 
NW AND AFTER 18 HOURS TURNING SW. EXCEPT WHERE PREVIOUSLY NOTED 
WITHIN 360 NM SE SEMICIRCLE WINDS TO 25 KT. SEAS 8 TO 12 FT.
.12 HOUR FORECAST LOW 55N174W 971 MB. OVER FORECAST WATERS 
WITHIN 300 NM NE AND 360 NM N AND NW QUADRANTS WINDS 25 TO 40 
KT. SEAS 9 TO 18 FT.
.24 HOUR FORECAST LOW AND CONDITIONS MERGED WITH LOW 55N177W 
DESCRIBED ABOVE.

...GALE WARNING... 
.LOW 47N173W 984 MB MOVING NE 40 KT NEXT 18 HOURS THEN TURNING N 
AND SLOWING. WITHIN 300 NM SE SEMICIRCLE WINDS 25 TO 35 KT. SEAS 
8 TO 12 FT.
.24 HOUR FORECAST LOW 58N165W 970 MB. FRONT TO EXTEND FROM LOW 
TO 59N160W TO 52N147W. WITHIN 240 NM SE SEMICIRCLE AND 180 NM N 
QUADRANT AND WITHIN 180 NM NE AND E OF FRONT WINDS 25 TO 40 KT. 
SEAS 8 TO 15 FT...HIGHEST NEAR 56N151W.
.48 HOUR FORECAST LOW 60N168W 975 MB. EXCEPT WHERE PREVIOUSLY 
NOTED WITHIN 360 NM S AND 240 NM W QUADRANTS WINDS 25 TO 40 KT. 
SEAS 9 TO 18 FT...HIGHEST NEAR 58N171W.

...GALE WARNING...
.LOW 39N177E 996 MB MOVING NE 50 KT. FRONT EXTENDS FROM LOW TO 
30N165E. WITHIN 420 NM E OF FRONT AND WITHIN 240 NM SE OF A LINE 
FROM 41N161W TO 37N174W WINDS 25 TO 40 KT. SEAS 10 TO 18 FT.
.24 HOUR FORECAST 50N157W 992 MB. FRONT TO EXTEND FROM 52N147W 
TO TO LOW CENTER TO 35N170W. WITHIN 420 NM SE QUADRANT WINDS 30 
TO 40 KT. SEAS 13 TO 20 FT. ELSEWHERE WITHIN 600 NM E AND SE 
QUADRANTS AND WITHIN 240 NM E OF FRONT WINDS 25 TO 35 KT. SEAS 9 
TO 17 FT.
.48 HOUR FORECAST LOW AND CONDITIONS MERGED WITH LOW 61N148W 
DESCRIBED ABOVE.

...GALE WARNING... 
.FROM 31N TO 42N BETWEEN 120W AND 130W AREA OF N TO NW WINDS 
LESS THAN 25 KT. SEAS TO 10 FT. 
.24 HOUR FORECAST FROM 32N TO 49N BETWEEN 124W AND 131W AREA OF 
N TO NW WINDS TO 25 KT. SEAS TO 11 FT.
.36 HOUR FORECAST FROM 35N TO 41N BETWEEN 123W AND 126W AREA OF 
N TO NW WINDS 25 TO 35 KT. SEAS 11 TO 16 FT.
.48 HOUR FORECAST FROM 32N TO 41N BETWEEN 122W AND 127W AREA OF 
N TO NW WINDS 25 TO 40 KT. SEAS 11 TO 20 FT. ELSEWHERE BETWEEN 
118W AND A LINE FROM 43N125W TO 30N146W WINDS 20 TO 30 KT. SEAS 
9 TO 17 FT. 

...HEAVY FREEZING SPRAY WARNING... 
.MODERATE TO HEAVY FREEZING SPRAY OVER ICE FREE FORECAST WATERS 
N OF 64N W OF 170W. 
.24 HOUR FORECAST MODERATE TO HEAVY REEZING SPRAY N OF 63N W OF 
168W. 
.48 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N OF A LINE 
FROM 64N168W TO 61N178W.

.SYNOPSIS AND FORECAST. 

.LOW 54N150W 999 MB MOVING NE 20 KT. WITHIN 480 NM SE AND S 
QUADRANTS WINDS 20 TO 30 KT. SEAS 9 TO 15 FT. 
.24 HOUR FORECAST LOW DISSIPATED. N OF 50N BETWEEN 132W AND 140W 
AREA OF SW WINDS TO 25 KT. SEAS 8 TO 12 FT. 
.30 HOUR FORECAST CONDITIONS DIMINISHED. 

.FROM 30N TO 38N BETWEEN 138W AND 150W AREA OF E TO NE WINDS TO 
25 KT. SEAS 9 TO 13 FT.
.24 HOUR FORECAST FROM 30N TO 36N BETWEEN 140W AND 153W AREA OF 
E TO NE WINDS TO 25 KT. SEAS TO 12 FT. 
.48 HOUR FORECAST FROM 30N TO 33N BETWEEN 144W AND 157W AREA OF 
E TO NE WINDS LESS THAN 25 KT. SEAS TO 9 FT. 

.48 HOUR FORECAST FROM 30N TO 36N BETWEEN 162W AND 168E AREA OF 
E TO NE WINDS 20 TO 30 KT. SEAS TO 12 FT. 

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 39N TO 47N 
BETWEEN 130W AND 135W AND FROM 37N TO 43N BETWEEN 178W AND 172W 
AND ALSO FROM 43N TO 47N BETWEEN 162W AND 172W.
.24 HOUR FORECAST DENSE FOG WITHIN 360 NM SE OF A LINE FROM 
53N152W TO 42N163W.
.48 HOUR FORECAST DENSE FOG WITHIN 120 NM OF 51N135W.

.HIGH 38N134W 1029 MB MOVING W 05 KT. 
.24 HOUR FORECAST HIGH DISSIPATED. 

.HIGH 41N140W 1029 MB MOVING E 05 KT.
.24 HOUR FORECAST HIGH 41N137W 1036 MB. 
.48 HOUR FORECAST HIGH 40N134W 1035 MB. 

.24 HOUR FORECAST HIGH 38N159E 1025 MB.
.48 HOUR FORECAST HIGH 41N175E 1032 MB.

.48 HOUR FORECAST NEW HIGH 40N176W 1030 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 THU DEC 14.
24 HOUR FORECAST VALID 1800 UTC FRI DEC 15.
48 HOUR FORECAST VALID 1800 UTC SAT DEC 16.

.WARNINGS.

...GALE WARNING...
.33 HOUR FORECAST N OF 15N BETWEEN 94.5W AND 95.5W...INCLUDING 
THE GULF OF TEHUANTEPEC...N TO NE WINDS 20 TO 30 KT. SEAS 
BUILDING TO 8 FT.
.36 HOUR FORECAST N OF 15N BETWEEN 94.5W AND 95.5W...INCLUDING 
THE GULF OF TEHUANTEPEC...N TO NE WINDS 30 TO 35 KT. SEAS TO 9 
FT. ELSEWHERE N OF 14N BETWEEN 94W AND 96W N TO NE WINDS 20 TO 
30 KT. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST WITHIN 45 NM OF LINE FROM 16N95W TO 13.5N95W 
TO 12.5N97W...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS 
20 TO 30 KT. SEAS 8 TO 11 FT.

.SYNOPSIS AND FORECAST.

.FROM 10N TO 12N E OF 88W...INCLUDING GULF OF PAPAGAYO...NE 
WINDS 20 TO 25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.W OF LINE FROM 30N120W TO 20N128W TO 19N119W TO 00N122W WINDS 
20 KT OR LESS. SEAS 8 TO 14 FT PRIMARILY IN NW SWELL...HIGHEST 
NEAR 30N140W. 
.24 HOUR FORECAST FROM 15N TO 22N W OF 135W NE TO E WINDS 20 TO 
25 KT. SEAS 9 TO 13 FT. ELSEWHERE W OF LINE FROM 30N116W TO 
11N122W TO 00N135W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT 
PRIMARILY IN NW SWELL.
.48 HOUR FORECAST FROM 11N TO 17N W OF 137W NE TO E WINDS 20 TO 
25 KT. SEAS 8 TO 11 FT. ELSEWHERE W OF LINE FROM 20N113W TO 
05N113W TO 00N120W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN 
PRIMARILY NW SWELL. 

.GULF OF CALIFORNIA 06 HOUR FORECAST N OF 30N NW WINDS 20 TO 25 
KT. SEAS LESS THAN 8 FT. 
.24 HOUR FORECAST N OF 28N NW WINDS 20 TO 25 KT. SEAS TO 8 FT N 
OF 29N.
.42 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.48 HOUR FORECAST COLD FRONT FROM 30N119W TO 29N126W. N OF FRONT 
NW TO N WINDS 20 TO 25 KT. SEAS 8 TO 9 FT. N OF 28N W OF 126W N 
TO NE WINDS 20 TO 25 KT. SEAS 8 TO 10 FT. ELSEWHERE W OF LINE 
FROM 30N116W TO 20N113W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN 
NW SWELL. 

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

CONVECTION VALID AT 2100 UTC THU DEC 14...

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
ITCZ FROM 07N81W TO 06N103W TO 11N122W. IT RESUMES FROM 11N127W 
TO BEYOND 10N140W. SCATTERED MODERATE FROM 09N TO 11N BETWEEN 
112W AND 120W. 

$$
.FORECASTER AL. NATIONAL HURRICANE CENTER.