North Atlantic High Seas Forecast

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FZNT01 KWBC 120949
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV 
NWS OCEAN PREDICTION CENTER WASHINGTON DC 
1030 UTC TUE DEC 12 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS 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). 

PAN PAN 

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

SYNOPSIS VALID 0600 UTC DEC 12 
24 HOUR FORECAST VALID 0600 UTC DEC 13 
48 HOUR FORECAST VALID 0600 UTC DEC 14 

.WARNINGS. 

...HURRICANE FORCE WIND WARNING... 
.LOW 62N35W 957 MB MOVING E 10 KT. WITHIN 240 NM N QUADRANT 
WINDS 50 TO 65 KT. SEAS 18 TO 32 FT. ALSO WITHIN 420 NM S AND SE 
AND 180 NM W QUADRANTS WINDS 45 TO 60 KT. SEAS 18 TO 43 FT. 
ELSEWHERE WITHIN 660 NM S AND SW QUADRANTS WINDS 30 TO 45 KT. 
SEAS 15 TO 30 FT. 
.24 HOUR FORECAST LOW E OF AREA 62N29W 964 MB. WITHIN 420 NM SW 
QUADRANT WINDS 40 TO 50 KT. SEAS 16 TO 33 FT. ELSEWHERE WITHIN 
660 NM SW AND 360 NM NW QUADRANTS WINDS 25 TO 40 KT. SEAS 13 TO 
26 FT.  
.48 HOUR FORECAST LOW WELL E OF AREA. BETWEEN 60N AND A LINE 
FROM 55N35W TO 59N45W WINDS 25 TO 35 KT. SEAS 10 TO 21 FT. 

...STORM WARNING... 
.12 HOUR COMPLEX LOW WITH MAIN CENTER 40N72W 997 MB N OF 31N AND 
WITHIN 360 NM E AND 660 NM S QUADRANTS WINDS 25 TO 35 KT. SEAS 
TO 10 FT. 
.24 HOUR FORECAST COMPLEX LOW WITH FIRST CENTER 41N68W 987 MB 
AND SECOND CENTER 44N69W 986 MB. WITHIN 180 NM SE QUADRANT OF 
FIRST CENTER WINDS 40 TO 50 KT. SEAS 12 TO 20 FT. ELSEWHERE N OF 
31N AND WITHIN 360 NM E AND 720 NM S QUADRANTS OF FIRST CENTER 
AND 600 NM NE QUADRANT OF SECOND CENTER WINDS 25 TO 40 KT. SEAS 
8 TO 14 FT.   
.48 HOUR FORECAST LOW INLAND 51N68W 967 MB. WITHIN 780 NM 
NE...1380 NM SE...AND 900 NM S QUADRANTS WINDS 30 TO 45 KT. SEAS 
12 TO 29 FT...HIGHEST NEAR 41N58W.

...GALE WARNING... 
.LOW 65N51W 972 MB MOVING N 20 KT. WITHIN 300 NM W SEMICIRCLE 
WINDS 25 TO 40 KT. SEAS 8 TO 15 FT. 
.24 HOUR FORECAST LOW DISSIPATED AND ASSOCIATED CONDITIONS 
DIMINISHED. 

...GALE WARNING... 
.LOW 57N56W 984 MB MOVING E 25 KT. WITHIN 240 NM W SEMICIRCLE 
AND 420 NM SE QUADRANT WINDS 25 TO 40 KT. SEAS 10 TO 20 FT. 
.24 HOUR FORECAST LOW AND CONDITIONS ABSORBED BY LOW 62N29W. 

...GALE WARNING... 
.LOW 43N48W 1014 MB MOVING NE 40 KT NEXT 12 HOURS THEN WILL TURN 
E. WITHIN 300 NM SE SEMICIRCLE WINDS 25 TO 35 KT. SEAS 10 TO 16 
FT. ELSEWHERE WITHIN 360 NM SE AND 480 NM E OF A FRONT FROM 
46N35W TO LOW CENTER TO 33N57W WINDS 20 TO 30 KT. SEAS 8 TO 12 
FT.  
.24 HOUR FORECAST LOW WELL E OF AREA WITH NEW LOW TO FORM ALONG 
FRONT NEAR 40N51W 1010 MB. FRONT TO EXTEND FROM 45N35W TO 42N46W 
TO LOW CENTER TO 33N55W. WITHIN 480 NM E AND SE QUADRANTS WINDS 
25 TO 35 KT. SEAS 10 TO 16 FT. ELSEWHERE WITHIN 240 NM SE AND 
420 NM E OF THE FRONT WINDS 20 TO 30 KT. SEAS 8 TO 14 FT. 
.48 HOUR FORECAST LOW E OF AREA 46N30W 1016 MB. WITHIN 240 NM E 
AND SE OF A FRONT FROM 45N35W TO 42N41W WINDS 20 TO 30 KT. SEAS 
8 TO 14 FT. 

...HEAVY FREEZING SPRAY WARNING... 
.MODERATE TO HEAVY FREEZING SPRAY W OF A LINE FROM 52N52W TO 
56N49W TO 61N58W TO 67N55W. 
.24 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY W OF A LINE 
FROM 55N54W TO 61N59W TO 67N55W. 
.48 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY NW OF A LINE 
FROM 57N61W TO 62N50W. 

.SYNOPSIS AND FORECAST. 

.DENSE FOG. 48 HOUR FORECAST VSBY OCCASIONALLY LESS THAN 1 NM 
FROM 42N TO 53N BETWEEN 42W AND 54W. 

.HIGH 45N46W 1019 MB MOVING NE 15 KT. 
.24 HOUR FORECAST HIGH 48N35W 1023 MB. 
.48 HOUR FORECAST HIGH MOVED E OF AREA. 

.24 HOUR FORECAST HIGH 51N49W 1025 MB. 
.48 HOUR FORECAST HIGH MOVED E OF AREA. 

.36 HOUR FORECAST HIGH 59N60W 1022 MB. 
.48 HOUR FORECAST HIGH 64N57W 1020 MB. 

.FORECASTER ACHORN. 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 TUE DEC 12.
24 HOUR FORECAST VALID 0600 UTC WED DEC 13.
48 HOUR FORECAST VALID 0600 UTC THU DEC 14.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.ATLC STATIONARY FRONT FROM 31N60W TO 27N66W TO 22N72W TO 20N74W.
WITHIN AREA BOUNDED BY 31N58W TO 31N64W TO 27N68W TO 27N62W TO
31N58W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN NW SWELL. WITHIN
AREA BOUNDED BY 25N69W TO 25N75W TO 21N76W TO 20N74W TO 25N69W NE
WINDS 20 TO 25 KT. SEAS 8 TO 9 FT.
.12 HOUR FORECAST WEAKENING STATIONARY FRONT FROM 31N60W TO 
BROAD LOW PRES NEAR 26N68W 1012 MB TO 20N74W. CONDITIONS IMPROVE.
WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. 
.24 HOUR FORECAST COLD FRONT FROM 31N63W TO 27N67W TO 20N76W.
WITHIN AREA BOUNDED BY 31N59W TO 31N64W TO 28N64W TO 28N60W TO
31N59W S TO SW WINDS 20 TO 25 KT. SEAS TO 8 FT.
.36 HOUR FORECAST COLD FRONT FROM 31N60.5W TO 27N63.5W TO 20N69W.
WITHIN AREA BOUNDED BY 31N54W TO 31N61W TO 29N62W TO 27N62W TO 
27N59W TO 29N55W TO 31N54W SW WINDS 20 TO 30 KT. SEAS 8 TO 11 
FT.
.48 HOUR FORECAST COLD FRONT FROM 31N57W TO 27N60W TO 21N66W. 
WITHIN AREA BOUNDED BY 31N53W TO 31N58W TO 29N58W TO 28N57W TO 
29N55W TO 31N53W SW TO W WINDS 20 TO 25 KT. SEAS 8 TO 10 FT.

.ATLC TROUGH FROM 24N53W TO 19N55W TO 14N58W. WITHIN AREA 
BOUNDED BY 31N35W TO 31N58W TO 28N58W TO 20N48W TO 07N49W TO 
07N35W TO 31N35W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN MIXED SE
AND NW SWELL. SCATTERED TSTMS WITHIN AREA BOUNDED BY 30N46W TO
30N50W TO 17N50W TO 17N46W TO 22N42W TO 30N46W.
.24 HOUR FORECAST TROUGH DISSIPATED. WITHIN AREA BOUNDED BY 
31N35W TO 26N48W TO 21N45W TO 07N52W TO 07N35W TO 31N35W WINDS 20
KT OR LESS. SEAS 8 TO 10 FT IN MIXED SE AND NW SWELL.
.48 HOUR FORECAST WITHIN AREA BOUNDED BY 31N35W TO 30N39W TO 
27N41W TO 23N41W TO 19N35W TO 31N35W WINDS 20 KT OR LESS. SEAS 8 
TO 10 FT IN MIXED NE AND NW SWELL. WITHIN AREA BOUNDED BY 11N48W 
TO 11N53W TO 10N57W TO 08N56W TO 06N52W TO 07N47W TO 11N48W WINDS
20 KT OR LESS. SEAS 8 FT IN NE SWELL.

.ATLC 12 HOUR FORECAST COLD FRONT ENTERING FROM 31N80.5W TO
30.5N81W. WITHIN AREA BOUNDED BY 31N73W TO 31N81W TO 30N80W TO 
30N76W TO 30N74W TO 31N73W SW TO W WINDS 20 TO 30 KT. SEAS TO 8
FT ALONG 31N.
.24 HOUR FORECAST COLD FRONT 31N72W TO 27N76W TO 24N80W. WITHIN 
AREA BOUNDED BY 31N66W TO 31N81W TO 27N80W TO 27N73W TO 31N66W W 
TO NW WINDS 20 TO 30 KT...EXCEPT SW WINDS AHEAD OF FRONT. SEAS 8 
TO 14 FT IN MIXED NE AND NW SWELL...HIGHEST NEAR 31N74W.
.36 HOUR FORECAST COLD FRONT FROM 31N64.5W TO 27N70W TO 
22.5N78W. WITHIN AREA BOUNDED BY 31N61W TO 31N78W TO 28N77W TO 
26N73W TO 29N62W TO 31N61W W TO NW WINDS 20 TO 30 KT...EXCEPT SW 
WINDS E OF 68W. SEAS 8 TO 15 FT IN MIXED NE AND NW SWELL... 
HIGHEST NEAR 31N69W.
.48 HOUR FORECAST COLD FRONT FROM 31N59W TO 27N65W TO 22N75W. 
WITHIN AREA BOUNDED BY 31N53W TO 31N74W TO 25N72W TO 25N70W TO 
28N62W TO 28N58W TO 31N53W WINDS 20 KT OR LESS. SEAS 8 TO 14 FT 
IN MIXED NE AND NW SWELL...HIGHEST NEAR 31N64W.

.CARIBBEAN STATIONARY FRONT FROM 20N74W TO 15N79W TO 09.5N80W. 
WITHIN AREA BOUNDED BY 17N78W TO 19N79W TO 19N87W TO 15N83W TO 
11N84W TO 10N80W TO 17N78W N TO NE WINDS 20 TO 30 KT. SEAS 8 TO 
12 FT...HIGHEST NEAR 11N82W...EXCEPT SEAS LESS THAN 8 FT WITHIN 
60 NM NE OF SHORE FROM 13N TO 16N.
.24 HOUR FORECAST STATIONARY FRONT FROM 20N74W TO 15N79W TO 
09.5N82W. WITHIN AREA BOUNDED BY 15N79W TO 18N78W TO 16N84W TO 
11N84W TO 10N82W TO 15N79W N WINDS 20 TO 25 KT. SEAS 8 TO 10
FT...EXCEPT LESS THAN 8 FT WITHIN 75 NM OF SHORE FROM 13N TO 16N.
.48 HOUR FORECAST DISSIPATING STATIONARY FRONT FROM 18N74.5W TO 
15N79W TO 09N81W. WITHIN AREA BOUNDED BY 15N80W TO 13N82W TO 
14N82W TO 11N84W TO 09N82W TO 09N81W TO 15N80W N TO NE WINDS 20 
TO 25 KT. SEAS 8 TO 10 FT...EXCEPT LESS THAN 8 FT N OF 12N WITHIN
60 NM OF SHORE.

.GULF OF MEXICO 06 HOUR FORECAST COLD FRONT FROM 30N86W TO
28.5N90W TO 28.5N96W. WITHIN AREA BOUNDED BY 30N86W TO 31N88W 
TO 29N93W TO 29N89W TO 29N87W TO 30N86W W TO NW WINDS 20 TO 25 
KT. SEAS LESS THAN 8 FT.
.12 HOUR FORECAST COLD FRONT FROM 29N83W TO 27N90W TO 27N94W. 
WITHIN AREA BOUNDED BY 29N83W TO 30N83W TO 29N85W TO 28N87W TO 
27N88W TO 27N85W TO 29N83W NW WINDS 20 TO 25 KT. SEAS TO 8 FT
NEAR 28N86W. 
.24 HOUR FORECAST WEAKENING COLD FRONT FROM 28N81W TO 24N88W TO
24N97W. CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS LESS THAN
8 FT.

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

$$
.FORECASTER LEWITSKY. NATIONAL HURRICANE CENTER.