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North Atlantic High Seas Forecast

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FZNT01 KWBC 180949
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV 
NWS OCEAN PREDICTION CENTER WASHINGTON DC 
1030 UTC MON DEC 18 2017 

CCODE/1:31:04:01:00/AOW/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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS 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. 
ONLY YOU KNOW THE WEATHER AT YOUR POSITION. REPORT IT TO THE 
NATIONAL WEATHER SERVICE. EMAIL US AT 
VOSOPS@NOAA.GOV(LOWERCASE). 

SECURITE 

NORTH ATLANTIC NORTH OF 31N TO 67N AND WEST OF 35W 

SYNOPSIS VALID 0600 UTC DEC 18 
24 HOUR FORECAST VALID 0600 UTC DEC 19 
48 HOUR FORECAST VALID 0600 UTC DEC 20 

.WARNINGS. 

...STORM WARNING... 
.LOW 64N38W 964 MB MOVING N 30 KT. OVER FORECAST WATERS WITHIN 
180 NM N SEMICIRCLE AND 420 NM S AND SE QUADRANTS WINDS 40 TO 55 
KT. SEAS 20 TO 36 FT. ELSEWHERE N OF 55N E OF 42W WINDS 25 TO 40 
KT. SEAS 11 TO 24 FT. 
.24 HOUR FORECAST LOW DISSIPATED INLAND WITH NEW LOW 63N40W 975 
MB. BETWEEN 60 NM AND 240 NM S AND SE QUADRANTS WINDS 35 TO 50 
KT. SEAS 14 TO 25 FT. ELSEWHERE WITHIN 300 NM SE SEMICIRCLE  
WINDS 25 TO 35 KT. SEAS 9 TO 18 FT. 
.48 HOUR FORECAST LOW 65N39W 984 MB. BETWEEN 90 NM AND 360 NM S  
QUADRANT WINDS 35 TO 50 KT. SEAS 12 TO 24 FT. ELSEWHERE WITHIN 
600 NM S QUADRANT WINDS 25 TO 35 KT. SEAS 9 TO 17 FT.  

...STORM WARNING... 
.24 HOUR FORECAST NEW LOW 38N60W 1009 MB. WITHIN 240 NM S 
QUADRANT WINDS 25 TO 35 KT. SEAS 8 TO 12 FT. ELSEWHERE OVER 
FORECAST WATERS S OF A LINE FROM 41N72W TO 37N65W TO 36N56W 
WINDS 20 TO 30 KT. SEAS TO 10 FT. 
.48 HOUR FORECAST LOW 42N50W 995 MB. WITHIN 240 NM E AND SE 
QUADRANTS WINDS 35 TO 50 KT. SEAS 10 TO 18 FT. ELSEWHERE WITHIN 
90 NM W...300 NM N...360 NM S AND 540 NM E AND SE QUADRANTS 
WINDS 25 TO 35 KT. SEAS TO 11 FT.

...GALE WARNING... 
.LOW 55N45W 982 MB MOVING E 05 KT. WITHIN 300 NM SW QUADRANT 
WINDS 25 TO 35 KT. SEAS 13 TO 20 FT. ELSEWHERE FROM 50N TO 55N 
BETWEEN 35W AND 58W WINDS 20 TO 30 KT. SEAS 9 TO 19 FT. 
.24 HOUR FORECAST LOW 56N40W 998 MB. WITHIN 540 NM S SEMICIRCLE 
WINDS 20 TO 30 KT. SEAS 9 TO 18 FT. 
.48 HOUR FORECAST LOW AND ASSOCIATED CONDITIONS E OF AREA. 

...GALE WARNING... 
.LOW E OF AREA 54N31W 992 MB MOVING NE 45 KT. OVER FORECAST 
WATERS E OF A LINE FROM 33N41W TO 45N37W WINDS 25 TO 35 KT. SEAS 
9 TO 18 FT. ELSEWHERE FROM 31N TO 50N E OF 63W WINDS TO 25 KT. 
SEAS 8 TO 16 FT. 
.24 HOUR FORECAST FROM 31N TO 44N E OF 46W WINDS LESS THAN 25 
KT. SEAS TO 11 FT.  
.48 HOUR CONDITIONS WELL E OF AREA. 

...GALE WARNING... 
.LOW 59N56W 984 MB MOVING SE 15 KT. OVER FORECAST WATERS W OF A 
LINE FROM 55N52W TO 62N60W AND WITHIN 420 NM N AND NE QUADRANTS  
WINDS 25 TO 40 KT. SEAS 8 TO 19 FT. 
.24 HOUR FORECAST LOW 58N47W 990 MB. WITHIN 240 NM S...SE AND NW 
QUADRANTS WINDS 20 TO 30 KT. SEAS 8 TO 15 FT.  
.48 HOUR FORECAST LOW AND ASSOCIATED CONDITIONS ABSORBED BY LOW 
65N39W ABOVE.  

...GALE WARNING...
.48 HOUR FORECAST LOW INLAND 48N64W 987 MB. OVER FORECAST WATERS 
WITHIN 360 NM E AND 540 NM S QUADRANTS WINDS 25 TO 40 KT. SEAS 8 
TO 15 FT. ELSEWHERE WITHIN 420 NM E AND 900 NM S QUADRANTS WINDS 
20 TO 30 KT. SEAS TO 10 FT.

...HEAVY FREEZING SPRAY WARNING... 
.MODERATE TO HEAVY FREEZING SPRAY OVER FORECAST WATERS FROM 47N 
TO 50N W OF 60W...AND W OF A LINE FROM 51N53W TO 54N54W TO 
60N59W TO 67N54W.  
.24 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY W OF LINE 
FROM 52N51W TO 60N59W TO 67N55W. 
.48 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY N OF 63N W OF 
58W.  

.SYNOPSIS AND FORECAST. 

.48 HOUR FORECAST WITHIN 360 NM S OF A LINE FROM 60N44W TO 
54N55W AREA OF S TO SW WINDS 20 TO 30 KT. SEAS TO 11 FT. 

.24 HOUR FORECAST HIGH 43N50W 1022 MB. 
.48 HOUR FORECAST HIGH 46N35W 1026 MB. 

.FORECASTER KOSIER. OCEAN PREDICTION CENTER.

NATIONAL HURRICANE CENTER MIAMI FL

ATLANTIC FROM 07N TO 31N W OF 35W INCLUDING CARIBBEAN SEA AND
GULF OF MEXICO

SYNOPSIS VALID 0600 UTC MON DEC 18.
24 HOUR FORECAST VALID 0600 UTC TUE DEC 19.
48 HOUR FORECAST VALID 0600 UTC WED DEC 20.

.WARNINGS.

...CARIBBEAN GALE WARNING...
.FROM 11N TO 13N BETWEEN 74W AND 77W NE TO E WINDS 30 TO 35 KT. 
SEAS 12 TO 15 FT. ELSEWHERE FROM 09.5N TO 17.5N BETWEEN 72W AND 
83W...NE TO E WINDS 20 TO 30 KT. SEAS 8 TO 13 FT. N OF 14N 
BETWEEN 64W AND 70W...INCLUDING CARIBBEAN PASSAGES...NE TO E 
WINDS 20 TO 25 KT. SEAS 8 TO 9 FT...EXCEPT LESS THAN 8 FT 
CARIBBEAN PASSAGES. 
.12 HOUR FORECAST FROM 11N TO 13N BETWEEN 74W AND 77W NE TO E 
WINDS 25 TO 30 KT. SEAS 10 TO 13 FT. ELSEWHERE FROM 10N TO 17.5N 
BETWEEN 69W AND 81W NE TO E WINDS 20 TO 25 KT. SEAS 8 TO 13 FT. 
REMAINDER OF AREA S OF 18N BETWEEN 76W AND 83W WINDS 20 KT OR 
LESS. SEAS 8 TO 11 FT IN NE TO E SWELL. 
.18 HOUR FORECAST FROM 11N TO 13N BETWEEN 74W AND 77W NE TO E 
WINDS 30 TO 35 KT. SEAS 12 TO 14 FT. ELSEWHERE FROM 10N TO 17N 
BETWEEN 72W AND 81W NE TO E WINDS 20 TO 30 KT. SEAS 8 TO 12 FT. 
N OF 15N BETWEEN 70W AND 72W NE WINDS 20 TO 25 KT. SEAS TO 9 FT. 
REMAINDER OF AREA S OF 18N BETWEEN 76W AND 83W WINDS 20 KT OR 
LESS. SEAS 8 TO 11 FT IN NE TO E SWELL. 
.24 HOUR FORECAST LITTLE CHANGE. 
.36 HOUR FORECAST FROM 10.5N TO 16N BETWEEN 73W AND 80W NE TO E 
WINDS 20 TO 25 KT. SEAS 8 TO 12 FT. ELSEWHERE S OF 17.5N BETWEEN 
69W AND 83W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN NE TO E 
SWELL. 
.42 HOUR FORECAST FROM 11N TO 13N BETWEEN 74W AND 77W NE TO E 
WINDS 30 TO 35 KT. SEAS 11 TO 13 FT. ELSEWHERE FROM 10N TO 17.5N 
BETWEEN 70W AND 80W...INCLUDING THE GULF OF VENEZUELA...NE TO E 
WINDS 20 TO 30 KT. SEAS 8 TO 12 FT. REMAINDER OF AREA S OF 17.5N 
BETWEEN 76W AND 83W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN NE 
TO E SWELL. 
.48 HOUR FORECAST LITTLE CHANGE.

.SYNOPSIS AND FORECAST.

.ATLC COLD FRONT FROM 31N43W TO 25N55W TO 21N70W. N OF A LINE 
FROM 31N40W TO 25N51W TO 24N62W TO 31N64W WINDS 20 KT OR LESS. 
SEAS 8 TO 12 FT IN NW SWELL...HIGHEST N OF 29N BETWEEN 46W AND 
56W. 
.24 HOUR FORECAST DISSIPATING STATIONARY FRONT FROM 31N39W TO 
26N45W. N OF A LINE FROM 27N35W TO 20N50W TO 23N59W WINDS 20 KT 
OR LESS. SEAS 8 TO 10 FT IN NW SWELL.
.48 HOUR FORECAST FRONT DISSIPATED. WINDS 20 KT OR LESS. SEAS 
LESS THAN 8 FT.

.ATLC FROM 13N TO 20N E OF 45W WINDS 20 KT OR LESS. SEAS 8 TO 9 
FT IN MIXED NE AND NW SWELL. 
.12 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.ATLC S OF 21N BETWEEN 72W AND 74W...INCLUDING APPROACH TO 
WINDWARD PASSAGE...NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 
8 FT.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST LITTLE CHANGE.

.ATLC 36 HOUR FORECAST NEW COLD FRONT JUST N OF AREA. N OF 30N 
BETWEEN 58W AND 68W SW TO W WINDS 20 TO 25 KT. SEAS TO 8 FT. 
.48 HOUR FORECAST COLD FRONT FROM 31N56W TO 29N64W. N OF 30N 
BETWEEN 52W AND 61W WINDS 20 KT OR LESS. SEAS 8 FT IN NW SWELL. 

.CARIBBEAN N OF 18N BETWEEN 73W AND 76W...INCLUDING WINDWARD 
PASSAGE...NE TO E WINDS 20 TO 25 KT. SEAS TO 8 FT. N OF 18N 
BETWEEN 76W AND 83W NE TO E WINDS 20 TO 25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST N OF 18N BETWEEN 73W AND 83W...INCLUDING 
WINDWARD PASSAGE...NE WINDS 20 TO 25 KT. SEAS TO 8 FT. N OF 18N 
BETWEEN 78W AND 80W NE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT. 
.48 HOUR FORECAST N OF 18.5N BETWEEN 73W AND 76W...INCLUDING 
WINDWARD PASSAGE...NE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.

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

$$
.FORECASTER LATTO. NATIONAL HURRICANE CENTER.