HIGH SEAS FORECAST FOR METAREA IV 
NWS OCEAN PREDICTION CENTER WASHINGTON DC 
0430 UTC TUE NOV 21 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS 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 0000 UTC NOV 21 
24 HOUR FORECAST VALID 0000 UTC NOV 22 
48 HOUR FORECAST VALID 0000 UTC NOV 23 

.WARNINGS. 

...STORM WARNING...
.LOW INLAND NEAR 57N64W 984 MB MOVING NW 15 KT. OVER FORECAST 
WATERS WITHIN 600 NM E AND NE QUADRANTS AND WITHIN 240 NM OF THE 
GREENLAND COAST BETWEEN 49W AND 41W WINDS 40 TO 55 KT. SEAS 17 
TO 31 FT. ELSEWHERE N AND NW OF A LINE FROM 54N35W TO 46N50W 
WINDS 25 TO 40 KT. SEAS 8 TO 17 FT...EXCEPT FROM 50N TO 63N 
BETWEEN 35W AND 64W SEAS 12 TO 24 FT.
.24 HOUR FORECAST LOW INLAND NEAR 63N73W 987 MB. WITHIN 300 NM N 
OF A LINE FROM 48N35W TO 62N62W WINDS 40 TO 55 KT. SEAS 12 TO 24 
FT...EXCEPT WITHIN 1080 NM E QUADRANT SEAS 20 TO 37 FT. 
ELSEWHERE N AND NE OF A LINE FROM 49N35W TO 53N48W TO 59N64W 
WINDS 25 TO 40 KT. SEAS 8 TO 17 FT.
.48 HOUR FORECAST LOW MOVED NW OF AREA. N OF 52N W OF 42W WINDS 
25 TO 35 KT. SEAS 11 TO 20 FT.

...STORM WARNING...
.LOW 44N51W 1003 MB MOVING NE 20 KT. OVER FORECAST WATERS WITHIN 
1020 NM SW...420 NM NW...AND 540 NM SE QUADRANTS WINDS 25 TO 40 
KT. SEAS 8 TO 18 FT.
.24 HOUR FORECAST LOW 49N41W 991 MB. WITHIN 300 NM SW SEMICIRCLE 
WINDS 35 TO 45 KT. SEAS 14 TO 19 FT. ELSEWHERE WITHIN 900 NM SW 
SEMICIRCLE WINDS 25 TO 40 KT. SEAS 8 TO 18 FT.
.48 HOUR FORECAST LOW 45N40W 1000 MB. WITHIN 480 NM SW AND 300 
NM N QUADRANTS WINDS 40 TO 50 KT. SEAS 17 TO 22 FT. ELSEWHERE 
WITHIN 600 NM N AND NW AND 720 NM S AND SW QUADRANTS WINDS 25 TO 
40 KT. SEAS 8 TO 17 FT. ALSO E OF A LINE FROM 63N37W TO 48N44W 
WINDS 20 TO 30 KT. SEAS 8 TO 16 FT.

...GALE WARNING...
.LOW E OF AREA 48N31W 986 MB MOVING SE 15 KT. OVER FORECAST 
WATERS WITHIN 360 NM NW AND 720 NM SW QUADRANTS WINDS 25 TO 35 
KT. SEAS 8 TO 16 FT...EXCEPT WITHIN 480 NM SW QUADRANT SEAS 15 
TO 20 FT.
.24 HOUR FORECAST LOW AND CONDITIONS MOVED E OF AREA.

...GALE WARNING...
.24 HOUR FORECAST OVER FORECAST WATERS NW OF A LINE FROM 43N60W 
TO 35N71W...AND FROM 31N TO 34N W OF 57W WINDS 20 TO 30 KT. SEAS 
TO 9 FT.
.36 HOUR FORECAST NEW LOW 34N73W 1008 MB. WITHIN 240 NM S 
SEMICIRCLE WINDS 25 TO 35 KT. SEAS TO 10 FT. 
.48 HOUR FORECAST LOW 38N67W 1009 MB. WITHIN 240 NM S SEMICIRCLE 
WINDS 35 TO 45 KT. SEAS 12 TO 19 FT. ELSEWHERE W OF A LINE FROM 
47N57W TO 31N56W WINDS 25 TO 35 KT. SEAS 8 TO 14 FT.

.SYNOPSIS AND FORECAST. 

.LIGHT TO MODERATE FREEZING SPRAY N OF 64N W OF GREENLAND. 
.24 HOUR FORECAST CONDITIONS IMPROVING. 

.LIGHT TO MODERATE FREEZING SPRAY N OF 64N E OF GREENLAND. 
.24 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY N OF 63N E OF 
GREENLAND.
.48 HOUR FORECAST LITTLE CHANGE.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM WITHIN 180 NM NE 
AND E OF A LINE FROM 60N64W TO 49N51W TO 43N50W. 
.24 HOUR FORECAST CONDITIONS IMPROVED. 

.HIGH 35N76W 1025 MB MOVING E 35 KT.
.24 HOUR FORECAST HIGH 36N59W 1030 MB.
.48 HOUR FORECAST HIGH 37N53W 1026 MB.

.(END OF FORECAST)