000
FZNT02 KNHC 050237
HSFAT2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL 
0430 UTC TUE SEP 05 2017

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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.

PAN PAN

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

SYNOPSIS VALID 0000 UTC TUE SEP 05.
24 HOUR FORECAST VALID 0000 UTC WED SEP 06.
48 HOUR FORECAST VALID 0000 UTC THU SEP 07.

.WARNINGS.

...HURRICANE WARNING...
.HURRICANE IRMA NEAR 16.7N 55.6W 943 MB AT 0300 UTC SEP 05 
MOVING W OR 270 DEG AT 11 KT. MAXIMUM SUSTAINED WINDS 120 KT 
GUSTS 145 KT. TROPICAL STORM FORCE WINDS WITHIN 120 NM NE 
QUADRANT...100 NM SE QUADRANT...80 NM SW QUADRANT...AND 110 NM 
NW QUADRANT.  SEAS 12 FT OR GREATER WITHIN 270 NM N 
SEMICIRCLE...120 NM SE QUADRANT AND 150 NM SW QUADRANT WITH SEAS 
TO 44 FT. ELSEWHERE WITHIN 360 NM N AND 150 NM S SEMICIRCLES OF 
CENTER WINDS 20 TO 33 KT. SEAS 8 TO 11 FT. REMAINING WATERS FROM 
10N TO 28N BETWEEN 47W AND 63W WINDS 20 KT OR LESS. SEAS 8 TO 11 
FT IN MIXED SWELL. NUMEROUS TSTMS IN BANDS WITHIN 150 NM NW AND 
120 NM SE SEMICIRCLES OF IRMA. 
.24 HOUR FORECAST HURRICANE IRMA NEAR 17.5N 60.0W. MAXIMUM 
SUSTAINED WINDS 130 KT GUSTS 160 KT. TROPICAL STORM FORCE WINDS 
WITHIN 140 NM NE QUADRANT...110 NM SE QUADRANT...80 NM SW 
QUADRANT...AND 120 NM NW QUADRANT. SEAS 12 FT OR GREATER OVER 
ATLC WATERS WITHIN 390 NM N AND 150 NM S SEMICIRCLES WITH SEAS 
TO 47 FT. ELSEWHERE WITHIN 420 NM N AND 180 NM S SEMICIRCLES 
WINDS 20 TO 33 KT. SEAS 8 TO 11 FT. REMAINDER WATERS FROM 13N TO 
29N BETWEEN 50W AND 68W WINDS 20 KT OR LESS. SEAS TO 8 TO 10 FT 
IN MIXED SWELL. 
.48 HOUR FORECAST HURRICANE IRMA NEAR 19.3N 65.5W. MAXIMUM 
SUSTAINED WINDS 125 KT GUSTS 150 KT. TROPICAL STORM FORCE WINDS 
WITHIN 160 NM NE QUADRANT...140 NM SE QUADRANT...90 NM SW 
QUADRANT...AND 150 NM NW QUADRANT. SEAS 12 FT OR GREATER OVER 
ATLC WATERS WITHIN 420 NM N AND 210 NM S SEMICIRCLES WITH SEAS 
TO 49 FT. ELSEWHERE WITHIN 450 NM N AND 210 NM S SEMICIRCLES 
WINDS 20 TO 33 KT. SEAS 8 TO 11 FT. REMAINDER WATERS FROM 16N TO 
31N BETWEEN 55W AND 72W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN 
MIXED SWELL.
.72 HOUR FORECAST HURRICANE IRMA NEAR 21.2N 71.0W. MAXIMUM 
SUSTAINED WINDS 120 KT GUSTS 145 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE IRMA NEAR 22.5N 76.0W. MAXIMUM 
SUSTAINED WINDS 115 KT GUSTS 140 KT.
.120 HOUR FORECAST HURRICANE IRMA NEAR 24.0N 80.0W. MAXIMUM 
SUSTAINED WINDS 115 KT GUSTS 140 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 LOW PRES NEAR 09N37W 1010 MB.  OVER FORECAST WATERS WITHIN 
150 NM SE SEMICIRCLE WINDS 20 TO 25 KT. SEAS TO 10 FT.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
13N39.5W 1009 MB. WITHIN 90 NM NE SEMICIRCLE OF LOW WINDS 20 TO 
25 KT. SEAS 8 TO 10 FT. ELSEWHERE FROM 10N TO 15N E OF 40W WINDS 
20 KT OR LESS. SEAS TO 9 FT IN MIXED SWELL.  
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
14N44W 1009 MB. WITHIN 210 NM N QUADRANT OF LOW WINDS 20 TO 30 
KT. SEAS 8 TO 11 FT.

.GULF OF MEXICO 36 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL 
CYCLONE...NEAR 21N96W 1009 MB. OVER FORECAST WATERS WITHIN 60 NM 
SW SEMICIRCLE OF LOW WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT. 
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
21N95W 1009 MB. OVER FORECAST WATERS WITHIN 120 NM SW SEMICIRCLE 
OF LOW WINDS 20 TO 25 KT. SEAS TO 9 FT.

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

$$
.FORECASTER AL. NATIONAL HURRICANE CENTER.