295  
FZNT02 KNHC 240321  
HSFAT2  
 
HIGH SEAS FORECAST  
NWS NATIONAL HURRICANE CENTER MIAMI FL  
0430 UTC FRI SEP 24 2021  
 
SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS  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.  
 
SECURITE  
 
ATLANTIC FROM 07N TO 31N W OF 35W INCLUDING CARIBBEAN SEA AND  
GULF OF MEXICO  
 
SYNOPSIS VALID 0000 UTC FRI SEP 24.  
24 HOUR FORECAST VALID 0000 UTC SAT SEP 25.  
48 HOUR FORECAST VALID 0000 UTC SUN SEP 26.  
 
.WARNINGS.  
   
..ATLANTIC HURRICANE WARNING
 
 
.TROPICAL STORM SAM NEAR 11.2N 40.9W 997 MB AT 0300 UTC SEP 24  
MOVING W OR 280 DEG AT 13 KT. MAXIMUM SUSTAINED WINDS 60 KT  
GUSTS 75 KT. TROPICAL STORM FORCE WINDS WITHIN 30 NM NW AND SE  
QUADRANTS...40 NM NE QUADRANT AND 20 NM SW QUADRANT. SEAS 12 FT  
OR GREATER WITHIN 0 NM S SEMICIRCLE...90 NM NE QUADRANT AND 60 NM  
NW QUADRANT WITH SEAS TO 15 FT. ELSEWHERE WITHIN 11N39W TO  
11N40W TO 12N41W TO 13N40W TO 13N39W TO 11N39W WINDS 20 TO 33 KT.  
SEAS 10 TO 12 FT. REMAINDER OF AREA WITHIN 12N35W TO 09N39W TO  
11N42W TO 14N41W TO 16N37W TO 12N35W WINDS 20 KT OR LESS. SEAS 8  
TO 10 FT IN MIXED SWELL.  
.12 HOUR FORECAST HURRICANE SAM NEAR 11.4N 42.9W. MAXIMUM  
SUSTAINED WINDS 75 KT GUSTS 90 KT.  
.24 HOUR FORECAST HURRICANE SAM NEAR 11.8N 45.0W. MAXIMUM  
SUSTAINED WINDS 90 KT GUSTS 110 KT. TROPICAL STORM FORCE WINDS  
WITHIN 50 NM NW AND SE QUADRANTS...60 NM NE QUADRANT AND 30 NM SW  
QUADRANT. SEAS 12 FT OR GREATER WITHIN 150 NM N SEMICIRCLE...90  
NM SE QUADRANT...AND 60 NM SW QUADRANT WITH SEAS TO 24 FT.  
ELSEWHERE WITHIN 12N44W TO 11N45W TO 11N46W TO 13N46W TO 13N44W  
TO 12N44W WINDS 20 TO 33 KT. SEAS 10 TO 12 FT. REMAINDER OF AREA  
WITHIN 13N40W TO 10N48W TO 14N48W TO 18N45W TO 18N41W TO 13N40W  
WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.  
.48 HOUR FORECAST HURRICANE SAM NEAR 12.5N 47.8W. MAXIMUM  
SUSTAINED WINDS 110 KT GUSTS 135 KT. TROPICAL STORM FORCE WINDS  
WITHIN 70 NM NW AND SE QUADRANTS...80 NM NE QUADRANT AND 50 NM SW  
QUADRANT. SEAS 12 FT OR GREATER WITHIN 180 N SEMICIRCLE...AND 90  
NM S SEMICIRCLE WITH SEAS TO 30 FT. ELSEWHERE WITHIN 12N47W TO  
11N49W TO 12N50W TO 15N49W TO 14N47W TO 12N47W WINDS 20 TO 33 KT.  
SEAS 10 TO 12 FT. REMAINDER OF AREA WITHIN 09N50W TO 13N54W TO  
17N52W TO 18N48W TO 15N45W TO 09N50W WINDS 20 KT OR LESS. SEAS 8  
TO 10 FT IN MIXED SWELL.  
.72 HOUR FORECAST HURRICANE SAM NEAR 13.5N 50.4W. MAXIMUM  
SUSTAINED WINDS 110 KT GUSTS 135 KT.  
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.  
.96 HOUR FORECAST HURRICANE SAM NEAR 15.3N 53.2W. MAXIMUM  
SUSTAINED WINDS 110 KT GUSTS 135 KT.  
.120 HOUR FORECAST HURRICANE SAM NEAR 17.3N 56.1W. MAXIMUM  
SUSTAINED WINDS 110 KT GUSTS 135 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 WITHIN 24N35W TO 21N50W TO 27N52W TO 31N62W TO 31N35W TO  
24N35W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT NW SWELL.  
.18 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS  
LESS THAN 8 FT.  
 
.GULF OF MEXICO WITHIN 19N95W TO 19N96W TO 20N96W TO 20N95W TO  
19N95W...INCLUDING WITHIN 60 NM OF VERACRUZ...NW TO N WINDS 20  
TO 25 KT. SEAS 8 FT.  
.03 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS  
LESS THAN 8 FT.  
 
.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.  
 

 
.FORECASTER ERA. NATIONAL HURRICANE CENTER.  
 
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