FZNT01 KWBC 180426
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV
NWS OCEAN PREDICTION CENTER WASHINGTON DC
0430 UTC MON SEP 18 2023

CCODE/2:31:04:11:00/AOE+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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS 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).

FOR INFORMATION ON ATLANTIC ICEBERGS SEE INFORMATION FROM NORTH 
ATLANTIC ICE SERVICE AT HTTPS://OCEAN.WEATHER.GOV/ATL_TAB.PHP 
(ALL LOWERCASE).

FROM OCTOBER 15 TO APRIL 1, DUE TO THE CLIMATOLOGY OF THE NORTH 
ATLANTIC AND THE FREQUENCY AND VOLUME OF WEATHER HAZARDS, ALONG 
WITH CUSTOMER FEEDBACK, HIGH SEAS FORECASTS N OF 31N WILL BE
LIMITED TO WINDS OF 25 TO 35 KNOTS AND HIGHER, AND SEAS OF 12 
FEET 
OR GREATER, ALONG WITH FREEZING SPRAY, DENSE FOG, AND VOLCANIC 
ASH.
LESSER CONDITIONS WILL BE INCLUDED FOR WARNING CONDITIONS AND TO
PRESERVE CONTINUITY WHERE APPROPRIATE. SEND FEEDBACK VIA 
HTTPS://OCEAN.WEATHER.GOV/CONTACT/INDEX.PHP (ALL LOWERCASE).

SECURITE

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

ALL FORECASTS VALID OVER ICE FREE FORECAST WATERS

SYNOPSIS VALID 0000 UTC SEP 18. 
24 HOUR FORECAST VALID 0000 UTC SEP 19.
48 HOUR FORECAST VALID 0000 UTC SEP 20.

.WARNINGS.

...HURRICANE WARNING... 
.24 HOUR FORECAST...EXCEPT WHERE NOTED BELOW IN PART 2 IN
ASSOCIATION WITH HURRICANE NIGEL FROM 31N TO 34N BETWEEN 47W AND
58W WINDS 20 TO 30 KT. SEAS TO 12 FT. 
.48 HOUR FORECAST HURRICANE NIGEL NEAR 32.1N 55.2W. MAXIMUM 
SUSTAINED WINDS 100 KT GUSTS 120 KT. TROPICAL STORM FORCE WINDS
WITHIN 140 NM NE QUADRANT...140 NM SE QUADRANT...90 NM SW 
QUADRANT...AND 100 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN
210 NM OF CENTER WITH SEAS TO 39 FT. ELSEWHERE FROM 31N TO 36N
BETWEEN 49W AND 61W WINDS 20 TO 33 KT. SEAS TO 12 FT. ALSO SEE
PART 2 BELOW.

...GALE WARNING ... 
.LOW E OF AREA 61N25W 975 MB MOVING SE 15 KT. WITHIN 480 NM NW 
QUADRANT WINDS 25 TO 40 KT. SEAS 16 TO 26 FT. ELSEWHERE WITHIN
480 NM SW QUADRANT WINDS 20 TO 30 KT. SEAS 10 TO 20 FT. 
.24 HOUR FORECAST LOW WELL E OF AREA. N OF 59N E OF 41W WINDS 30
TO 45 KT. SEAS 14 TO 26 FT. ELSEWHERE N OF 55N E OF 46W WINDS 25
TO 35 KT. SEAS 10 TO 18 FT. 
.48 HOUR FORECAST LOW E OF AREA 56N28W 989 MB. WITHIN 360 NM SW
QUADRANT WINDS 35 TO 45 KT. SEAS 14 TO 23 FT. ELSEWHERE WITHIN
480 NM SW AND W AND 720 NM N QUADRANTS WINDS 25 TO 35 KT. SEAS 9
TO 16 FT. 

...GALE WARNING... 
.LOW 50N57W 993 MB MOVING E 30 KT. WITHIN 480 NM S AND 240 NM SW
QUADRANTS WINDS 25 TO 35 KT. SEAS 10 TO 18 FT. ELSEWHERE WITHIN
480 NM N AND 780 NM E QUADRANTS WINDS 20 TO 30 KT. SEAS TO 12 FT.
.24 HOUR FORECAST LOW E OF AREA NEAR 53N31W 988 MB. FROM 44N TO
55N E OF 48W WINDS 25 TO 35 KT. SEAS 10 TO 18 FT. 
.48 HOUR FORECAST CONDITIONS E OF AREA. 

...GALE WARNING...
.12 HOUR FORECAST FROM 31N TO 39N BETWEEN 69W AND 76W WINDS 25 TO
35 KT. SEAS TO 9 FT. 
.24 HOUR FORECAST LOW 40N71W 1004 MB. WITHIN 300 NM E AND SE
QUADRANTS WINDS 25 TO 35 KT. SEAS 8 TO 13 FT. ELSEWHERE WITHIN
180 NM NE AND 180 NM SW QUADRANTS WINDS 20 TO 30 KT. SEAS TO 10
FT. 
.48 HOUR FORECAST LOW 48N64W 1000 MB. WITHIN 180 NM N SEMICIRCLE
WINDS 25 TO 35 KT. SEAS TO 11 FT. ELSEWHERE WITHIN 420 NM NE AND
600 NM SE QUADRANTS WINDS 20 TO 30 KT. SEAS TO 9 FT.

.SYNOPSIS AND FORECAST.

.LOW 35N44W 1008 MB MOVING NE 10 KT. WITHIN 300 NM OF
CENTER...EXCEPT 480 NM NE QUADRANT WINDS 20 TO 30 KT. SEAS 9 TO
17 FT
.24 HOUR FORECAST LOW 38N42W 1012 MB. WITHIN 300 NM E SEMICIRCLE
AND 240 NM W SEMICIRCLE WINDS 20 TO 30 KT. SEAS 8 TO 14 FT.
.48 HOUR FORECAST LOW 39N35W 1012 MB. FROM 33N TO 42N E OF 39W
WINDS 20 TO 30 KT. SEAS 8 TO 13 FT. 

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM FROM 45N TO 54N 
BETWEEN 35W AND 56W. 
.24 HOUR FORECAST DENSE FOG N OF 60N E OF GREENLAND.
.48 HOUR FORECAST DENSE FOG FROM 43N TO 47N BETWEEN 54W AND 60W.

.FORECASTER ACHORN. OCEAN PREDICTION CENTER.

NWS NATIONAL HURRICANE CENTER MIAMI FL

ATLANTIC FROM 07N TO 31N W OF 35W INCLUDING CARIBBEAN SEA AND
GULF OF MEXICO

SYNOPSIS VALID 0000 UTC MON SEP 18.
24 HOUR FORECAST VALID 0000 UTC TUE SEP 19.
48 HOUR FORECAST VALID 0000 UTC WED SEP 20.

.WARNINGS.

...ATLC HURRICANE WARNING...
.TROPICAL STORM NIGEL NEAR 25.8N 50.2W 992 MB AT 0300 UTC SEP 18 
MOVING NNW OR 330 DEG AT 10 KT. MAXIMUM SUSTAINED WINDS 60 KT 
GUSTS 80 KT. TROPICAL STORM FORCE WINDS WITHIN 120 NM NE 
QUADRANT...70 NM SE QUADRANT...50 NM SW QUADRANT...AND 90 NM NW 
QUADRANT. SEAS 12 FT OR GREATER WITHIN 150 NM NW AND SE 
QUADRANTS...210 NM NE QUADRANT AND 180 NM SW QUADRANT WITH SEAS 
TO 25 FT. ELSEWHERE WITHIN 240 NM NE QUADRANT...270 NM SE 
QUADRANT..180 NM SW QUADRANT AND 210 NM NM QUADRANT WINDS 20 TO 
33 KT. SEAS 8 TO 12 FT. 
.12 HOUR FORECAST HURRICANE NIGEL NEAR 27.0N 51.3W. MAXIMUM 
SUSTAINED WINDS 75 KT GUSTS 90 KT.
.24 HOUR FORECAST HURRICANE NIGEL NEAR 28.5N 52.8W. MAXIMUM 
SUSTAINED WINDS 90 KT GUSTS 110 KT. TROPICAL STORM FORCE WINDS 
WITHIN 100 NM NW AND SE QUADRANTS...130 NM NE QUADRANT AND 80 NM 
SW QUADRANT. SEAS 12 FT OR GREATER WITHIN 180 NM OF CENTER OF 
NIGEL...EXCEPT 240 NM NE QUADRANT WITH SEAS TO 34 FT. ELSEWHERE 
WITHIN 300 NM NE QUADRANT...270 NM SE QUADRANT...180 NM SW 
QUADRANT AND 240 NM NW QUADRANT WINDS 20 TO 33 KT. SEAS 9 TO 14 
FT. REMAINDER OF AREA FROM 20N TO 31N BETWEEN 44W AND 60W WINDS 
20 KT OR LESS. SEAS 8 TO 10 IN MIXED SWELL.
.48 HOUR FORECAST HURRICANE NIGEL JUST N OF AREA NEAR 32.1N 
55.2W. MAXIMUM SUSTAINED WINDS 100 KT GUSTS 120 KT. TROPICAL 
STORM FORCE WINDS WITHIN 140 NM E SEMICIRCLE...90 NM SW QUADRANT 
AND 100 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 240 NM OF 
CENTER...EXCEPT 270 NM NE QUADRANT WITH SEAS TO 38 FT. ELSEWHERE 
WITHIN 360 NM NE QUADRANT...300 NM SE QUADRANT AND 240 NM W 
SEMICIRCLE WINDS 20 TO 33 KT. SEAS 10 TO 14 FT. REMAINDER OF 
AREA FROM 24N TO 31N BETWEEN 47W AND 68W WINDS 20 KT OR LESS. 
SEAS 8 TO 10 IN MIXED SWELL.
.72 HOUR FORECAST HURRICANE NIGEL NEAR 37.4N 52.5W. MAXIMUM 
SUSTAINED WINDS 90 KT GUSTS 110 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE NIGEL NEAR 43.1N 42.1W. MAXIMUM 
SUSTAINED WINDS 75 KT GUSTS 90 KT.
.120 HOUR FORECAST POST-TROPICAL EXTRATROPICAL NIGEL NEAR 50.8N 
28.0W. MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 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 24 HOUR FORECAST FROM 20N TO 27N BETWEEN 35W AND 38W WINDS 
20 KT OR LESS. SEAS 8 FT IN NE SWELL.
.24 HOUR FORECAST FROM 20N TO 28N E OF 40W WINDS 20 KT OR LESS. 
SEAS 8 FT IN NE SWELL.
.48 HOUR FORECAST FROM 20N TO 25N E OF 41W WINDS 20 KT OR LESS. 
SEAS 8 FT IN NE SWELL.

.CARIBBEAN FROM 11N TO 13N BETWEEN 69W AND 73W...INCLUDING
THE GULF OF VENEZUELA...NE TO E WINDS 20 TO 25 KT. SEAS LESS 
THAN 8 FT.
.24 HOUR FORECAST LITTLE CHANGE.
.48 HOUR FORECAST LITTLE CHANGE.

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


.FORECASTER AGUIRRE. NATIONAL HURRICANE CENTER.

$$