000
FZNT02 KNHC 042051
HSFAT2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL 
2230 UTC MON SEP 04 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC MON SEP 04.
24 HOUR FORECAST VALID 1800 UTC TUE SEP 05.
48 HOUR FORECAST VALID 1800 UTC WED SEP 06.

.WARNINGS.

...HURRICANE WARNING...
.HURRICANE IRMA NEAR 16.7N 54.4W 944 MB AT 2100 UTC SEP 04 
MOVING W OR 265 DEG AT 11 KT. MAXIMUM SUSTAINED WINDS 115 KT 
GUSTS 140 KT. TROPICAL STORM FORCE WINDS WITHIN 120 NM NE 
QUADRANT...100 NM SE QUADRANT...70 NM SW QUADRANT...AND 110 NM 
NW QUADRANT.  SEAS 12 FT OR GREATER WITHIN 270 NM N 
SEMICIRCLE...120 NM SE QUADRANT AND 180 NM SW QUADRANT WITH SEAS 
TO 42 FT. ELSEWHERE WITHIN 330 NM N AND 180 NM S SEMICIRCLES OF 
CENTER WINDS 20 TO 33 KT. SEAS 8 TO 11 FT. REMAINING WATERS FROM 
10N TO 28N BETWEEN 46W AND 61W WINDS 20 KT OR LESS. SEAS 8 TO 11 
FT IN MIXED SWELL. NUMEROUS TSTMS IN BANDS WITHIN 150 NM N AND 
90 NM S SEMICIRCLES OF IRMA. 
.24 HOUR FORECAST HURRICANE IRMA NEAR 17.0N 58.7W. 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 WITHIN 
390 NM N AND 180 NM S SEMICIRCLES WITH SEAS TO 46 FT. ELSEWHERE 
WITHIN 420 NM N AND 210 NM S SEMICIRCLES WINDS 20 TO 33 KT. SEAS 
8 TO 11 FT. REMAINDER WATERS FROM 12N TO 27N BETWEEN 50W AND 66W 
WINDS 20 KT OR LESS. SEAS TO 8 TO 10 FT IN MIXED SWELL. 
.48 HOUR FORECAST HURRICANE IRMA NEAR 18.7N 64.1W. 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 WITHIN 
420 NM N AND 210 NM S SEMICIRCLES WITH SEAS TO 48 FT. ELSEWHERE 
WITHIN 450 NM N AND 270 NM S SEMICIRCLES WINDS 20 TO 33 KT. SEAS 
8 TO 11 FT. REMAINDER WATERS FROM 14N TO 30N BETWEEN 53W AND 71W 
WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.72 HOUR FORECAST HURRICANE IRMA NEAR 20.4N 69.7W. MAXIMUM 
SUSTAINED WINDS 120 KT GUSTS 145 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE IRMA NEAR 21.6N 74.8W. MAXIMUM 
SUSTAINED WINDS 115 KT GUSTS 140 KT.
.120 HOUR FORECAST HURRICANE IRMA NEAR 23.0N 79.0W. 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 09N36W 1010 MB.  OVER FORECAST WATERS S OF 
10N E OF 38W WINDS 20 KT OR LESS. SEAS TO 8 FT IN E SWELL.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
13N39W 1009 MB. WITHIN 90 NM E QUADRANT OF LOW WINDS 20 TO 25 
KT. SEAS 8 TO 10 FT. ELSEWHERE FROM 09N 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 
13N43W 1009 MB. WITHIN 210 NM N SEMICIRCLE OF LOW WINDS 20 TO 25 
KT. SEAS 8 TO 11 FT.
 
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

$$
.FORECASTER AL. NATIONAL HURRICANE CENTER.