North Atlantic High Seas Forecast

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FZNT01 KWBC 190350
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV 
NWS OCEAN PREDICTION CENTER WASHINGTON DC 
0430 UTC WED DEC 19 2018 

CCODE/1:31:04:01:00/AOE/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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS 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. 

SEE ANNOUNCEMENT OF PLANNED INMARSAT I-3 TO I-4 MIGRATION 
IN 2018 AT OCEAN.WEATHER.GOV/GMDSS_NOTICE.PHP (LOWERCASE) 

METAREA IV BULLETIN WILL ONLY BE BROADCAST FROM THE INMARSAT 
AOE SATELLITE. PLEASE ENSURE YOUR RECEIVER IS POINTED 
CORRECTLY. 

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

FOR INFORMATION ON ATLANTIC ICEBERGS SEE INFORMATION FROM NORTH 
AMERICAN ICE SERVICE AT HTTPS://OCEAN.WEATHER.GOV/ATL_TAB.SHTML 

SECURITE 

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

SYNOPSIS VALID 0000 UTC DEC 19. 
24 HOUR FORECAST VALID 0000 UTC DEC 20. 
48 HOUR FORECAST VALID 0000 UTC DEC 21. 

.WARNINGS. 

...STORM WARNING... 
.LOW 47N58W 972 MB MOVING NE 15 KT. OVER FORECAST WATERS WITHIN 
720 NM SW...300 NM NW AND 720 NM S QUADRANTS WINDS 30 TO 40 KT. 
SEAS 12 TO 24 FT. ELSEWHERE WITHIN 1080 NM S...900 NM SW AND 420 
NM NW QUADRANTS...AND WITHIN 240 NM NE AND E OF A FRONT FROM 
36N49W TO 44N47W TO 52N53W WINDS 20 TO 30 KT. SEAS 9 TO 15 FT.
.24 HOUR FORECAST LOW 52N52W 965 MB. OVER FORECAST WATERS WITHIN 
120 NM S AND SW OF A LINE FROM 51N52W TO 58N58W...AND FROM 56N 
TO 60N BETWEEN 42W AND 50W WINDS 40 TO 50 KT. SEAS 10 TO 20 FT. 
ELSEWHERE WITHIN 1300 NM SE...900 NM SW...660 NM NW...AND 600 NM 
NE QUADRANTS WINDS 25 TO 40 KT. SEAS 11 TO 22 FT.
.48 HOUR FORECAST LOW 52N47W 976 MB. WITHIN 900 NM SE...780 NM 
SW QUADRANTS...WITHIN 120 NM S AND SW OF A LINE FROM 53N52W TO 
60N61W...WITHIN 180 NM N OF A LINE FROM 57N42W TO 57N56W...AND 
FROM 57N TO 63N BETWEEN 35W AND 42W WINDS 25 TO 40 KT. SEAS 10 
TO 24 FT...HIGHEST IN S QUADRANT.

...GALE WARNING...
.42 HOUR FORECAST LOW INLAND 31N83W 1003 MB. OVER FORECAST 
WATERS FROM 31N TO 37N BETWEEN 70W AND 81W WINDS 25 TO 35 KT. 
SEAS TO 9 FT.
.48 HOUR FORECAST LOW 32N79W 999 MB. W OF A LINE FROM 31N73W TO 
36N73W WINDS 35 TO 45 KT. SEAS 8 TO 15 FT. ELSEWHERE WITHIN 540 
NM E SEMICIRCLE WINDS 20 TO 35 KT. SEAS TO 10 FT.

...HEAVY FREEZING SPRAY WARNING... 
.LIGHT TO MODERATE FREEZING SPRAY OVER ICE FREE WATERS N OF 64N 
BETWEEN 52W AND 59W. 
.24 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY W OF A LINE 
FROM 56N60W TO 59N61W TO 63N59W TO 67N55W. 
.48 HOUR FORECAST MODERATE TO HEAVY FREEZING SPRAY W OF A LINE 
FROM 57N60W TO 59N62W TO 64N58W TO 67N54W. 

.SYNOPSIS AND FORECAST. 

.LOW 66N58W 990MB MOVING N 15 KT. OVER ICE FREE FORECAST WATERS 
WITHIN 90 NM E SEMICIRCLE WINDS 20 TO 30 KT. SEAS TO 8 FT.
.24 HOUR FORECAST LOW AND CONDITIONS N OF AREA.

.FROM 60N TO 64N BETWEEN GREENLAND AND 52W WINDS 20 TO 30 KT. 
SEAS TO 8 FT.
.24 HOUR FORECAST FROM 62N TO 65N BETWEEN 56W AND 58W WINDS TO 
25 KT. SEAS TO 8 FT.
.48 HOUR FORECAST BETWEEN GREENLAND AND A LINE FROM 61N52W TO 
67N56W WINDS TO 25 KT. SEAS 8 TO 11 FT.

.LOW 58N22W 969 MB MOVING SE 15 KT. FROM 57N TO 64N E OF 39W 
WINDS 20 TO 30 KT. SEAS 8 TO 14 FT.
.24 HOUR FORECAST LOW AND CONDITIONS E OF AREA.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 42N TO 53N 
BETWEEN 44W AND 55W. 
.24 HOUR FORECAST CONDITIONS IMPROVED. 

.24 HOUR FORECAST HIGH 33N69W 1024 MB. 
.48 HOUR FORECAST HIGH 34N59W 1027 MB. 

.FORECASTER JOSEPH. 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 0000 UTC WED DEC 19.
24 HOUR FORECAST VALID 0000 UTC THU DEC 20.
48 HOUR FORECAST VALID 0000 UTC FRI DEC 21.

.WARNINGS.

...ATLC GALE WARNING...
.ATLC 36 HOUR FORECAST N OF 29N W OF 74W SE WINDS 20 TO 25 KT. 
SEAS LESS THAN 8 FT.
.48 HOUR FORECAST N OF 28N BETWEEN 75W AND 79W S WINDS 30 TO 35 
KT. SEAS 12 FT. ELSEWHERE N OF LINE FROM 31N68W TO 23N80W S 
WINDS 20 TO 30 KT SEAS TO 11 FT N OF BAHAMAS. 

...GULF OF MEXICO GALE WARNING...
.GULF OF MEXICO 30 HOUR FORECAST COLD FRONT FROM 30N90W TO 
26N90W TO 18N94W. N OF 26N E OF FRONT SE TO S WINDS 20 TO 25 KT. 
SEAS LESS THAN 8 FT. SCATTERED TSTMS E OF FRONT.
.42 HOUR FORECAST COLD FRONT FROM 30N87W TO 27N87W TO 19N91W.
E OF FRONT S TO SW WINDS 20 TO 30 KT. SEAS TO 8 FT. N OF 25N W 
OF 92W W TO NW WINDS 20 TO 25 KT. SEAS TO 8 FT. SCATTERED TSTMS 
IN LINES E OF FRONT.
.42 HOUR FORECAST COLD FRONT FROM 30N85W TO 21N88W. E OF FRONT S 
TO SW WINDS 20 TO 30 KT. SEAS TO 11 FT. N OF 25N W OF 91W NW 
WINDS 30 TO 35 KT. SEAS 10 TO 13 FT. ELSEWHERE N OF 22N W OF 92W 
W TO NW WINDS 20 TO 30 KT. SEAS TO 11 FT. NUMEROUS TSTMS IN 
LINES E OF FRONT.
.48 HOUR FORECAST COLD FRONT FROM 30N84W TO 21N85W. E OF FRONT 
SW WINDS 20 TO 30 KT. SEAS TO 11 FT. FROM 25N TO 29N BETWEEN 88W 
AND 95W NW WINDS 30 TO 35 KT. SEAS 11 TO 17 FT. ELSEWHERE N OF 
20N W OF FRONT W TO NW WINDS 20 TO 30 KT. SEAS 8 TO 12 FT. 
NUMEROUS TSTMS IN LINES E OF FRONT. 

.SYNOPSIS AND FORECAST.

.ATLC COLD FRONT FROM 31N54W TO 24N65W THEN FRONTAL TROUGH TO 
21N7W. N OF 27N WITHIN 300 NM E OF FRONT SW WINDS 20 TO 25 KT. 
SEAS TO 11 FT. ELSEWHERE N OF 29N E OF FRONT TO 35W WINDS 20 KT 
OR LESS. SEAS TO 8 FT. N OF 30N WITHIN 480 NM W OF FRONT W TO NW 
WINDS 20 TO 25 KT. SEAS TO 11 FT. ELSEWHERE N OF 29N WITHIN 600 
NM W OF FRONT WINDS 20 KT OR LESS. SEAS TO 9 FT IN NW SWELL.
.24 HOUR FORECAST WEAKENING COLD FRONT FROM 31N47W TO 26N55W 
THEN FRONTAL TROUGH TO 26N77W. N OF 27N WITHIN 480 NM E OF FRONT 
WINDS 20 KT OR LESS. SEAS TO 11 FT. N OF 27N W OF FRONT TO 67W 
WINDS 20 KT OR LESS. SEAS 8 TO 15 FT PRIMARILY IN NW 
SWELL...HIGHEST SEAS AT 31N52W. 
.48 HOUR FORECAST WEAKENING COLD FRONT FROM 31N40W TO 
26N50W...THEN FRONTAL TROUGH TO 24N60W TO 31N70W. WITHIN AREA 
BOUNDED BY LINE FROM 31N60W TO 31N35W TO 28N35W TO 20N55W TO 
31N60W WINDS 20 KT OR LESS. SEAS TO 11 FT PRIMARILY IN NW SWELL.

.ATLC S OF 14N BETWEEN 35W AND 48W WINDS 20 KT OR LESS. SEAS TO 
9 FT IN MIXED N AND SE SWELL.
.24 HOUR FORECAST S OF 12N BETWEEN 35W AND 53W WINDS 20 KT OR 
LESS. SEAS TO 9 FT IN MIXED N AND SE SWELL. 
.48 HOUR FORECAST S OF 09N BETWEEN 43W AND 54W WINDS 20 KT OR 
LESS. SEAS TO 8 FT IN MIXED N AND SE SWELL.   

.CARIBBEAN FROM 10.5N TO 15N BETWEEN 71W AND 79W NE TO E WINDS 
20 TO 30 KT. SEAS TO 11 FT.
.24 HOUR FORECAST FROM 10N TO 15N BETWEEN 70W AND 81W NE TO E 
WINDS 20 TO 25 KT. SEAS TO 11 FT. 
.36 HOUR FORECAST FROM 10.5N TO 18N BETWEEN 71W AND 78W NE TO E 
WINDS 20 TO 25 KT. SEAS TO 10 FT.
.48 HOUR FORECAST FROM 11N TO 15N BETWEEN 70W AND 74W NE TO E 
WINDS 20 TO 25 KT. SEAS TO 9 FT.

.CARIBBEAN 30 HOUR FORECAST W OF 85W SE TO S WINDS 20 TO 25 KT. 
SEAS LESS THAN 8 FT.
.48 HOUR FORECAST COLD FRONT ACROSS YUCATAN CHANNEL. N OF 20N W 
OF 81W SW TO W WINDS 20 TO 30 KT. SEAS TO 8 FT. SCATTERED TSTMS 
YUCATAN CHANNEL. 

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

$$
.FORECASTER NELSON. NATIONAL HURRICANE CENTER.