National Weather Service Raw Text Product

833 
FZNT01 KWBC 311007
HSFAT1

HIGH SEAS FORECAST FOR METAREA IV 
NWS OCEAN PREDICTION CENTER WASHINGTON DC 
1030 UTC THU AUG 31 2017 

CCODE/2:31:04:11:00/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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS 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. 
ONLY YOU KNOW THE WEATHER AT YOUR POSITION. REPORT IT TO THE 
NATIONAL WEATHER SERVICE. EMAIL US AT 
VOSOPS@NOAA.GOV(LOWERCASE). 

ATLANTIC ICEBERG ANALYSIS AND OUTLOOK PRODUCTS...COURTESY OF 
THE U.S. COAST GUARD INTERNATIONAL ICE PATROL...CAN BE FOUND 
ON THE OCEAN PREDICTION CENTER WEB PAGE AT 
HTTP://WWW.OPC.NCEP.NOAA.GOV/ATL_TAB.SHTML(LOWERCASE). 

PAN PAN 

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

SYNOPSIS VALID 0600 UTC AUG 31 
24 HOUR FORECAST VALID 0600 UTC SEP 01 
48 HOUR FORECAST VALID 0600 UTC SEP 02 

.WARNINGS. 

...HURRICANE FORCE WIND WARNING... 
.LOW 42N61W 976 MB MOVING NE 20 KT. WITHIN 120 NM SW SEMICIRCLE 
WINDS 50 TO 65 KT. SEAS 18 TO 32 FT. ALSO WITHIN 150 NM W AND SW 
SEMICIRCLES WINDS 40 TO 55 KT. SEAS 16 TO 28 FT. ELSEWHERE 
WITHIN 300 NM NE...480 NM SE...420 NM SW...AND 240 NM NW 
QUADRANTS WINDS 25 TO 40 KT. SEAS 9 TO 24 FT. OTHERWISE WITHIN 
720 NM SW QUADRANT WINDS TO 25 KT. SEAS 8 TO 15 FT.
.24 HOUR FORECAST LOW 45N50W 980 MB. WITHIN 240 NM S SEMICIRCLE 
WINDS 35 TO 50 KT. SEAS 18 TO 34 FT. ALSO WITHIN 600 NM SE AND 
420 NM SW QUADRANTS WINDS 25 TO 40 KT. SEAS 10 TO 20 FT...EXCEPT 
SW QUADRANT SEAS 14 TO 28 FT. ELSEWHERE WITHIN 720 NM S AND 360 
NM N SEMICIRCLES WINDS 20 TO 30 KT. SEAS 8 TO 20 FT...HIGHEST 
SW. OTHERWISE WITHIN 960 NM SW QUADRANT WINDS LESS THAN 25 KT. 
SEAS 8 TO 14 FT. 
.48 HOUR FORECAST LOW E OF AREA 50N33W 993 MB. OVER FORECAST 
WATERS WITHIN 600 NM SW QUADRANT WINDS 25 TO 35 KT. SEAS 11 TO 
22 FT. ELSEWHERE FROM 31N TO 42N E OF 50W WINDS TO 25 KT. SEAS 8 
TO 17 FT. 

...GALE WARNING... 
.LOW 48N43W 993 MB MOVING NE 20 KT. WITHIN 240 NM S AND SE 
QUADRANTS WINDS 25 TO 40 KT. SEAS 14 TO 24 FT. ALSO WITHIN 360 
NM S...600 NM SE...AND 240 NM E AND NE QUADRANTS WINDS 20 TO 30 
KT. SEAS 8 TO 16 FT. ELSEWHERE WITHIN 300 NM NW QUADRANT WINDS 
LESS THAN 25 KT. SEAS TO 12 FT.
.24 HOUR FORECAST LOW 53N35W 999 MB. WITHIN 120 NM W AND 300 NM 
S QUADRANTS WINDS TO 25 KT. SEAS 8 TO 13 FT.
.36 HOUR FORECAST LOW AND CONDITIONS MOVED E OF AREA. 

...GALE WARNING... 
.48 HOUR FORECAST NEW LOW 61N46W 1000 MB. OVER FORECAST WATERS 
WITHIN 120 NM W SEMICIRCLE WINDS 25 TO 35 KT. SEAS TO 12 FT. 

.SYNOPSIS AND FORECAST. 

.LOW 62N56W 1000 MB MOVING NE 20 KT. OVER FORECAST WATERS W OF A 
FRONT FROM THE LOW TO 55N58W...AND WITHIN 180 NM E QUADRANT 
WINDS 20 TO 30 KT. SEAS TO 8 FT.
.24 HOUR FORECAST LOW WELL N OF AREA. FROM 54N TO 58N W OF 56W 
WINDS TO 25 KT. SEAS TO 8 FT.
.48 HOUR FORECAST CONDITIONS DIMINISHED.

.24 HOUR FORECAST OVER FORECAST WATERS W OF A LINE FROM 66N58W 
TO 61N63W AREA OF SW WINDS TO 25 KT. SEAS LESS THAN 8 FT. 
.36 HOUR FORECAST BETWEEN GREENLAND AND A LINE FROM 67N56W TO 
65N55W S WINDS WINDS 20 TO 30 KT. SEAS TO 11 FT.
.48 HOUR FORECAST FROM 61N TO 65N W OF 56W W WINDS TO 25 KT. 
SEAS TO 8 FT. 

.48 HOUR FORECAST NEW LOW 46N49W 1004 MB. WITHIN 240 NM SE OF A 
LINE FROM THE LOW TO 38N58W...ALSO FROM 39N TO 45N BETWEEN 55W 
AND 65W WINDS 20 TO 30 KT. SEAS TO 12 FT.

.48 HOUR FORECAST OVER FORECAST WATERS N OF 63N BETWEEN 36W AND 
40W AREA OF NW WINDS TO 25 KT. SEAS TO 8 FT. 

.DENSE FOG. VSBY OCCASIONALLY LESS THAN 1 NM BETWEEN 35W AND A 
LINE FROM 52N37W TO 48N36W.
.24 HOUR FORECAST DENSE FOG FROM 53N TO 58N BETWEEN 35W AND 38W. 
.48 HOUR FORECAST CONDITIONS MOVED E OF AREA.

.HIGH 33N76W 1019 MB MOVING SE 15 KT. 
.24 HOUR FORECAST HIGH 31N70W 1019 MB. 
.48 HOUR FORECAST LITTLE CHANGE.

.48 HOUR FORECAST NEW HIGH 39N72W 1023 MB. 

.48 HOUR FORECAST NEW HIGH 33N58W 1021 MB. 

.FORECASTER REINHART. 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 0600 UTC THU AUG 31.
24 HOUR FORECAST VALID 0600 UTC FRI SEP 01.
48 HOUR FORECAST VALID 0600 UTC SAT SEP 02.

.WARNINGS.

...HURRICANE WARNING...
.TROPICAL STORM IRMA NEAR 16.5N 32.9W 997 MB AT 0900 UTC AUG 31 
MOVING W OR 280 DEG AT 10 KT. MAXIMUM SUSTAINED WINDS 60 KT 
GUSTS 75 KT. TROPICAL STORM FORCE WINDS WITHIN 40 NM NW AND SE 
QUADRANTS...50 NM NE QUADRANT AND 30 NM SW QUADRANT. SEAS 12 FT 
OR GREATER WITHIN 60 NM OF CENTER EXCEPT 30 NM SW QUADRANT WITH 
SEAS TO 22 FT. OVER FORECAST WATERS WINDS 20 KT OR LESS. SEAS 
LESS THAN 8 FT. 
.12 HOUR FORECAST HURRICANE IRMA NEAR 17.0N 34.2W. MAXIMUM 
SUSTAINED WINDS 70 KT GUSTS 85 KT. LITTLE CHANGE IN RADII OF 
TROPICAL STORM FORCE WINDS AND 12 FT SEAS. OVER FORECAST WATERS 
FROM 17N TO 21N N TO NE WINDS 20 TO 25 KT. SEAS 8 TO 11 FT. 
.24 HOUR FORECAST HURRICANE IRMA NEAR 17.6N 36.0W. MAXIMUM 
SUSTAINED WINDS 80 KT GUSTS 100 KT. TROPICAL STORM FORCE WINDS 
WITHIN 80 NM NW AND SE QUADRANTS...90 NM NE QUADRANT AND 60 NM 
SW QUADRANT. SEAS 12 FT OR GREATER WITHIN 120 NM N AND 75 NM S 
SEMICIRCLES WITH SEAS TO 27 FT. ELSEWHERE OVER FORECAST WATERS 
WITHIN 240 NM N AND 120 NM S SEMICIRCLES WINDS 20 TO 33 KT. SEAS 
8 TO 12 FT.  
.48 HOUR FORECAST HURRICANE IRMA NEAR 18.2N 40.1W. MAXIMUM 
SUSTAINED WINDS 90 KT GUSTS 110 KT. TROPICAL STORM FORCE WINDS 
WITHIN 100 NM N SEMICIRCLE...90 NM SE QUADRANT AND 60 NM SW 
QUADRANT. SEAS 12 FT OR GREATER WITHIN 180 NM N AND 90 NM S 
SEMICIRCLES WITH SEAS TO 34 FT. ELSEWHERE WITHIN 300 NM N AND 
120 NM S SEMICIRCLES WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. 
.72 HOUR FORECAST HURRICANE IRMA NEAR 17.5N 45.0W. MAXIMUM 
SUSTAINED WINDS 100 KT GUSTS 120 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE IRMA NEAR 16.7N 49.5W. MAXIMUM 
SUSTAINED WINDS 105 KT GUSTS 130 KT.
.120 HOUR FORECAST HURRICANE IRMA NEAR 16.0N 53.5W. MAXIMUM 
SUSTAINED WINDS 105 KT GUSTS 130 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 18 HOUR FORECAST N OF 30N BETWEEN 55W AND 60W WINDS 20 KT 
OR LESS. SEAS 8 FT IN NE SWELL.
.24 HOUR FORECAST N OF 29.5N BETWEEN 53W AND 58W...AND N OF 30N 
BETWEEN 58W AND 65W WINDS 20 KT OR LESS. SEAS TO 9 FT IN NE 
SWELL.
.36 HOUR FORECAST N OF 29N BETWEEN 50W AND 65W WINDS 20 KT OR 
LESS. SEAS 8 TO 10 FT IN NE SWELL. 
.48 HOUR FORECAST N OF A LINE FROM 31N40W TO 25N50W TO 25N58W TO 
31N58W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN NE SWELL. 

.CARIBBEAN FROM 11N TO 13.5N BETWEEN 70W AND 74W...INCLUDING THE 
GULF OF VENEZUELA NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST FROM 11N TO 15N BETWEEN 70W AND 76W... 
INCLUDING THE GULF OF VENEZUELA...NE TO E WINDS 20 TO 25 KT. 
SEAS BUILDING TO 8 FT. FROM 15N TO 17.5N BETWEEN 70W AND 74W E 
WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST FROM 11N TO 15N BETWEEN 69W AND 78W... 
INCLUDING THE GULF OF VENEZUELA...NE TO E WINDS 20 TO 25 KT. 
SEAS TO 9 FT. FROM 15N TO 17.5N BETWEEN 70W AND 76W E WINDS 20 
TO 25 KT. SEAS LESS THAN 8 FT.

.GULF OF MEXICO N OF 28N BETWEEN 87W AND 93W S TO SW WINDS 20 TO 
25 KT. SEAS TO 8 FT. 
.12 HOUR FORECAST N OF 29N BETWEEN 86W AND 92W S TO SW WINDS 20 
TO 25 KT. SEAS TO 8 FT E OF 90W.
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

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

$$
.FORECASTER GR. NATIONAL HURRICANE CENTER.