North Atlantic High Seas Forecast

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FZNT01 KWBC 231610
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV 
NWS OCEAN PREDICTION CENTER WASHINGTON DC 
1630 UTC SUN SEP 23 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS 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 1200 UTC SEP 23. 
24 HOUR FORECAST VALID 1200 UTC SEP 24. 
48 HOUR FORECAST VALID 1200 UTC SEP 25. 

.WARNINGS.

...TROPICAL STORM WARNING...
.SUBTROPICAL STORM LESLIE NEAR 33.0N 46.5W 1002 MB AT 1500 UTC
SEP 23 MOVING W OR 270 DEG AT 3 KT. MAXIMUM SUSTAINED WINDS 35
KT GUSTS 45 KT. TROPICAL STORM FORCE WINDS WITHIN 200 NM NW 
QUADRANT.  SEAS 12 FT OR GREATER WITHIN 180 NM SW AND 300 NM NW 
QUADRANT WITH SEAS TO 18 FT. ELSEWHERE WITHIN 420 NM OF LOW 
CENTER WINDS 20 TO 33 KT. SEAS TO 12 FT.
.24 HOUR FORECAST SUBTROPICAL STORM LESLIE NEAR 33.0N 47.5W.
MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. TROPICAL STORM FORCE
WINDS WITHIN 180 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 
120 NM NE...240 NM SW...AND 240 NM NW QUADRANTS WITH SEAS TO 12 
FT. ELSEWHERE WITHIN 420 NM NE...360 NM SE...200 NM SW...AND 240 
NM NW QUADRANTS WIND 20 TO 33 KT. SEAS TO 12 FT.
.48 HOUR FORECAST SUBTROPICAL STORM LESLIE NEAR 33.0N 45.0W.
MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT. TROPICAL STORM FORCE
WINDS WITHIN 140 NM NE QUADRANT...170 NM SE QUADRANT...20 NM SW
QUADRANT...AND 190 NM NW QUADRANT. SEAS 12 FT OR GREATER
WITHIN 240 NM NE QUADRANT WITH SEAS TO 12 FT. ELSEWHERE WITHIN 
360 NM NE...240 NM SE...240 NM SW...AND 180 NM NW QUADRANTS 
WINDS 20 TO 33 KT. SEAS TO 10 FT.
.72 HOUR FORECAST...DISSIPATED.

...STORM WARNING... 
.LOW 59N51W 962 MB MOVING NE 10 KT WILL TURN SE AFTER 24 HOURS. 
OVER FORECAST WATERS WITHIN 180 NM S SEMICIRCLE WINDS 50 TO 65 
KT. SEAS 20 TO 36 FT. ALSO OVER FORECAST WATERS WITHIN 300 NM S 
SEMICIRCLE...420 NM W AND 240 NM N QUADRANTS WINDS 40 TO 50 KT. 
SEAS 16 TO 30 FT. ELSEWHERE WITHIN 600 NM OF LOW CENTER WINDS 25 
TO 40 KT. SEAS 10 TO 20 FT. 
.24 HOUR FORECAST LOW 59N51W 977 MB. WITHIN 420 NM SE...360 NM 
SW AND NW QUADRANTS WINDS 25 TO 40 KT. SEAS 14 TO 28 FT. 
.48 HOUR FORECAST LOW 58N37W 996 MB. WITHIN 240 NM S AND 420 NM 
W QUADRANTS WINDS 25 TO 40 KT. SEAS 12 TO 22 FT. ELSEWHERE OVER 
FORECAST WATERS E OF A LINE FROM 64N55W TO 59N59W TO 50N50W 
EXCEPT N OF 60N E OF GREENLAND WINDS 20 TO 30 KT. SEAS 9 TO 18 
FT.  

...GALE WARNING...  
.06 HOUR FORECAST LOW 62N41W 992 MB. OVER FORECAST WATERS WITHIN 
240 NM NE AND 120 NM N QUADRANTS WINDS 25 TO 40 KT. SEAS 8 TO 14 
FT.
.24 HOUR FORECAST LOW AND ASSOCIATED CONDITIONS NE OF AREA. 

...GALE WARNING...
.24 HOUR FORECAST NEW LOW 58N39W 1004 MB. OVER FORECAST WATERS 
WITHIN 90 NM E AND 300 NM S QUADRANTS WINDS 25 TO 40 KT. SEAS 20 
TO 26 FT.
.48 HOUR FORECAST LOW AND ASSOCIATED CONDITIONS WELL E OF AREA.

...GALE WARNING...
.36 HOUR FORECAST WITHIN 300 NM NW OF A LINE FROM 47N39W TO 
34N56W WINDS 20 TO 30 KT. SEAS TO 12 FT.
.42 HOUR FORECAST WITHIN 300 NM NW OF A LINE FROM 42N43W TO 
33N56W WINDS 25 TO 35 KT. SEAS TO 12 FT.
.48 HOUR FORECAST WITHIN 360 NM NW OF A LINE FROM 39N45W TO 
31N54W WINDS 25 TO 35 KT. SEAS 8 TO 16 FT.

.SYNOPSIS AND FORECAST. 

.LOW 45N39W 1018 MB MOVING NE 15 KT. OVER FORECAST WATERS WITHIN 
90 NM OF LOW WINDS 20 TO 30 KT. SEAS TO 9 FT. 
.24 HOUR FORECAST LOW AND ASSOCIATED CONDITIONS WELL E OF AREA. 

.LOW S OF AREA 28N68W 1010 MB MOVING W 10 KT. FROM 31N TO 33N 
BETWEEN 61W AND 70W WINDS TO 25 KT. SEAS TO 9 FT. 
.24 HOUR FORECAST CONDITIONS DIMINISHED. 

.48 HOUR FORECAST FROM 33N TO 42N W OF 60W WINDS 20 TO 30 KT. 
SEAS TO 12 FT.

.HIGH 36N59W 1022 MB MOVING SW 15 KT. 
.24 HOUR FORECAST HIGH 34N63W 1022 MB. 
.48 HOUR FORECAST HIGH DISSIPATED.

.HIGH 45N59W 1023 MB MOVING NE 40 KT. 
.24 HOUR FORECAST HIGH E OF AREA. 

.24 HOUR FORECAST HIGH 45N37W 1023 MB. 
.48 HOUR FORECAST HIGH E OF AREA. 

.FORECASTER KREKELER. 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 1200 UTC SUN SEP 23.
24 HOUR FORECAST VALID 1200 UTC MON SEP 24.
48 HOUR FORECAST VALID 1200 UTC TUE SEP 25.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM KIRK NEAR 9.3N 30.2W 1006 MB AT 1500 UTC SEP 23 
MOVING W OR 280 DEG AT 18 KT. MAXIMUM SUSTAINED WINDS 35 KT 
GUSTS 45 KT. TROPICAL STORM FORCE WINDS WITHIN 60 NM N 
SEMICIRCLE AND 0 NM S SEMICIRCLE.  SEAS 12 FT OR GREATER WITHIN 
30 NM N SEMICIRCLE AND 0 NM S SEMICIRCLE WITH SEAS TO 13 FT. 
OVER FORECAST WATERS WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST TROPICAL STORM KIRK NEAR 10.2N 37.3W. MAXIMUM 
SUSTAINED WINDS 45 KT GUSTS 55 KT. LITTLE CHANGE IN RADIUS OF 
TROPICAL STORM FORCE WINDS. SEAS 12 FT OR GREATER WITHIN 120 NM 
NE AND 30 NM NW QUADRANTS WITH SEAS TO 16 FT. ELSEWHERE OVER 
FORECAST WATERS WITHIN 210 NM N AND 60 NM S SEMICIRCLES WINDS 20 
TO 33 KT. SEAS 8 TO 11 FT.  
.48 HOUR FORECAST TROPICAL STORM KIRK NEAR 10.7N 45.6W. MAXIMUM 
SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE WINDS 
WITHIN 0 NM S SEMICIRCLE...70 NM NE QUADRANT AND 60 NM NW 
QUADRANT. SEAS 12 FT OR GREATER WITHIN 210 NM NE...120 NM 
SW...AND 30 NM SE QUADRANTS WITH SEAS TO 20 FT. ELSEWHERE WITHIN 
240 NM N AND 60 NM S SEMICIRCLES WINDS 20 TO 33 KT. SEAS 8 TO 11 
FT. REMAINDER OF AREA FROM 08N TO 18N BETWEEN 37W AND 52W WINDS 
20 KT OR LESS. SEAS 8 TO 9 FT IN MIXED SWELL.
.72 HOUR FORECAST TROPICAL STORM KIRK NEAR 11.2N 52.4W. MAXIMUM 
SUSTAINED WINDS 45 KT GUSTS 55 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST TROPICAL STORM KIRK NEAR 11.2N 52.4W. MAXIMUM 
SUSTAINED WINDS 40 KT GUSTS 50 KT.
.120 HOUR FORECAST TROPICAL STORM KIRK NEAR 13.5N 62.0W. MAXIMUM 
SUSTAINED WINDS 35 KT GUSTS 45 KT.

FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE 
USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE 
AND INTENSITY.

.SYNOPSIS AND FORECAST. 

.ATLC SUBTROPICAL STORM LESLIE N OF AREA NEAR 33.0N 46.5W 1002 
MB AT 1500 UTC SEP 23. WITHIN AREA BOUNDED BY 31N41W TO 31N37W 
TO 26N40W TO 26N43W TO 31N41W S WINDS 20 TO 25 KT. SEAS 8 TO 11 
FT. ELSEWHERE WITHIN AREA BOUNDED BY 31N58W TO 31N37W TO 25N42W 
TO 25N55W TO 31N58W WINDS 20 KT OR LESS. SEAS 8 TO 12 FT IN 
MIXED SWELL. 
.24 HOUR FORECAST SUBTROPICAL STORM LESLIE N OF AREA NEAR 33.0N 
47.5W. OVER FORECAST WATERS WITHIN 360 NM SE AND 210 NM SW 
SEMICIRCLES WINDS 20 TO 25 KT. SEAS 8 TO 11 FT. ELSEWHERE WITHIN 
AREA BOUNDED BY 31N58W TO 31N40W TO 25N44W TO 25N55W TO 31N58W 
WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL. 
.48 HOUR FORECAST SUBTROPICAL STORM LESLIE N OF AREA NEAR 33.0N 
45.0W. OVER FORECAST WATERS WITHIN 270 NM SE QUADRANT WINDS 20 
TO 25 KT. SEAS 8 TO 9 FT. ELSEWHERE N OF 27N BETWEEN 39W AND 55W 
WINDS 20 KT OR LESS. SEAS TO 9 FT IN MIXED SWELL. 

.ATLC LOW PRES NEAR 28N68W 1010 MB. N OF 27N BETWEEN 65W AND 71W 
WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN N TO NE SWELL.
.24 HOUR FORECAST LOW PRES NEAR 29N72W 1013 MB. N OF 29N BETWEEN 
70W AND 74W WINDS 20 KT OR LESS. SEAS TO 8 FT IN N TO NE SWELL.
.36 HOUR FORECAST LOW PRES NEAR 29N72W 1013 MB. WINDS 20 KT OR 
LESS. SEAS LESS THAN 8 FT.

.CARIBBEAN FROM 11N TO 13N BETWEEN 75W AND 77W NE TO E WINDS 20 
TO 25 KT. SEAS TO 8 FT.
.06 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST LITTLE CHANGE. 
.48 HOUR FORECAST FROM 11N TO 16N BETWEEN 70W AND 77W WINDS 20 
KT OR LESS. SEAS TO 8 FT IN E SWELL.

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

$$
.FORECASTER AL. NATIONAL HURRICANE CENTER.