North Atlantic High Seas Forecast

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FZNT01 KWBC 270335
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV 
NWS OCEAN PREDICTION CENTER WASHINGTON DC 
0430 UTC FRI APR 27 2018 

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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS 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

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 APR 27. 
24 HOUR FORECAST VALID 0000 UTC APR 28. 
48 HOUR FORECAST VALID 0000 UTC APR 29. 

.WARNINGS. 

...STORM WARNING... 
.OVER FORECAST WATERS FROM 36N TO 51N BETWEEN 55W AND 64W AREA 
OF S TO SE WINDS 25 TO 40 KT. SEAS 12 TO 19 FT. 
.24 HOUR FORECAST LOW 64N53W 991 MB. FRONT TO EXTEND FROM 67N57W 
TO LOW CENTER TO 56N49W TO 46N49W. WITHIN 240 NM SE QUADRANT 
WINDS 35 TO 50 KT. SEAS 12 TO 24 FT. ELSEWHERE WITHIN 300 NM E 
OF THE FRONT...AND 240 NM W OF THE FRONT N OF 55N WINDS 25 TO 35 
KT. SEAS 9 TO 15 FT.
.48 HOUR FORECAST LOW AND ASSOCIATED CONDITIONS N OF AREA. 

.SYNOPSIS AND FORECAST. 

.LOW E OF AREA 54N27W 1008 MB MOVING SE 25 KT. OVER FORECAST 
WATERS WITHIN 420 NM W AND SW QUADRANTS WINDS TO 25 KT. SEAS TO 
12 FT. 
.24 HOUR FORECAST LOW AND CONDITIONS E OF AREA. 

.OVER ICE FREE FORECAST WATERS WITHIN 120 NM E OF A LINE FROM 
60N47W TO 58N45W AREA OF W WINDS TO 25 KT. SEAS TO 8 FT. 
.24 HOUR FORECAST CONDITIONS DIMINISHED. 

.OVER ICE FREE FORECAST WATERS N OF 56N AND W OF 51W WINDS 20 TO 
30 KT. SEAS TO 8 FT.
.24 HOUR FORECAST CONDITIONS N OF AREA.

.24 HOUR FORECAST OVER FORECAST WATERS W OF LINE FROM 42N56W TO 
33N62W AREA OF S TO SW WINDS TO 25 KT. SEAS TO 9 FT. 
.48 HOUR FORECAST FROM 34N TO 58N BETWEEN 51W AND 65W WINDS 20 
TO 30 KT. SEAS TO 12 FT.

.48 HOUR FORECAST NEW LOW 63N37W 1007 MB. BETWEEN 180 NM AND 360 
NM S AND SW QUADRANTS WINDS 20 TO 30 KT. SEAS TO 12 FT.

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 40N TO 43N 
BETWEEN 63W AND 69W AND WITHIN 60 NM OF 48N62W. 
.24 HOUR FORECAST DENSE FOG BETWEEN 58W AND 47W N OF 44N AND 
WITHIN 60 NM OF 48N62W. 
.48 HOUR FORECAST DENSE FOG W OF A LINE FROM 50N44W TO 43N46W TO 
39N64W. 

.LIGHT TO MODERATE FREEZING SPRAY OVER ICE FREE FORECAST WATERS 
N OF 65N AND W OF GREENLAND. 
.24 HOUR FORECAST CONDITIONS IMPROVED. 
.48 HOUR FORECAST LIGHT TO MODERATE FREEZING SPRAY W AND NW OF A 
LINE FROM 61N49W TO 59N60W. 

.HIGH 42N41W 1035 MB MOVING E 10 KT.
.24 HOUR FORECAST HIGH 42N38W 1037 MB. 
.48 HOUR FORECAST HIGH 38N42W 1037 MB. 

.FORECASTER NOLT. 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 FRI APR 27.
24 HOUR FORECAST VALID 0000 UTC SAT APR 28.
48 HOUR FORECAST VALID 0000 UTC SUN APR 29.

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.ATLC LOW PRES NEAR 28N51W 1018 MB. N OF 25N BETWEEN 48W AND 56W 
WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN N SWELL.
.24 HOUR FORECAST LOW DISSIPATED. TROUGH FROM 31N56W TO 25N54W. 
WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.ATLC 48 HOUR FORECAST S OF 11N BETWEEN 50W AND 53W NE WINDS 20 
TO 25 KT. SEAS 8 FT.

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

$$
.FORECASTER MUNDELL. NATIONAL HURRICANE CENTER.