000
FZNT02 KNHC 282121
HSFAT2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 UTC TUE SEP 28 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC TUE SEP 28.
24 HOUR FORECAST VALID 1800 UTC WED SEP 29.
48 HOUR FORECAST VALID 1800 UTC THU SEP 30.

.WARNINGS.

...ATLC HURRICANE WARNING...
.HURRICANE SAM NEAR 17.9N 55.0W 947 MB AT 2100 UTC SEP 28 MOVING NW
OR 305 DEG AT 8 KT. MAXIMUM SUSTAINED WINDS 115 KT GUSTS 140 KT.
TROPICAL STORM FORCE WINDS WITHIN 110 NM N SEMICIRCLE...120 NM 
SE QUADRANT AND 90 NM SW QUADRANT. SEAS 12 FT OR GREATER WITHIN 
180 NM N SEMICIRCLE AND 90 NM S SEMICIRCLE WITH SEAS TO 38 FT. 
ELSEWHERE WITHIN 16N54W TO 17N56W TO 18N57W TO 20N54W TO 19N52W 
TO 16N54W WINDS 20 TO 33 KT. SEAS 10 TO 12 FT. REMAINDER OF AREA WITHIN
17N51W TO 15N54W TO 18N59W TO 23N56W TO 20N51W TO 17N51W WINDS 
20 TO 33 KT. SEAS 8 TO 10 IN MIXED SWELL.
.24 HOUR FORECAST HURRICANE SAM NEAR 19.7N 57.4W. MAXIMUM 
SUSTAINED WINDS 115 KT GUSTS 140 KT. TROPICAL STORM FORCE WINDS 
WITHIN 110 NM NE QUADRANT...120 NM SE QUADRANT...70 NM SW 
QUADRANT...AND 90 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 
180 NM NE AND 120 NM SW SEMICIRCLES WITH SEAS TO 39 FT. ELSEWHERE
WITHIN 19N55W TO 18N58W TO 20N59W TO 22N57W TO 21N55W TO 19N55W 
WINDS 20 TO 33 KT. SEAS 10 TO 12 FT. REMAINDER OF AREA WITHIN 
18N55W TO 19N61W TO 25N59W TO 25N55W TO 22N53W TO 18N55W WINDS 20
KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.48 HOUR FORECAST HURRICANE SAM NEAR 22.8N 60.6W. MAXIMUM SUSTAINED
WINDS 110 KT GUSTS 135 KT. TROPICAL STORM FORCE WINDS WITHIN 120
NM E SEMICIRCLE...80 NM SW QUADRANT AND 100 NM NW QUADRANT. SEAS
12 FT OR GREATER WITHIN 150 NM NE AND 120 SW SEMICIRCLES WITH 
SEAS TO 35 FT. ELSEWHERE WITHIN 22N59W TO 21N61W TO 22N63W TO 
25N62W TO 24N58W TO 22N59W WINDS 20 TO 33 KT. SEAS 10 TO 12 FT. 
REMAINDER OF AREA WITHIN 21N56W TO 19N60W TO 22N66W TO 29N60W TO 
27N55W TO 21N56W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED 
SWELL.
.72 HOUR FORECAST HURRICANE SAM NEAR 27.7N 62.0W. MAXIMUM 
SUSTAINED WINDS 110 KT GUSTS 135 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE SAM NEAR 33.5N 59.0W. MAXIMUM 
SUSTAINED WINDS 100 KT GUSTS 120 KT.
.120 HOUR FORECAST HURRICANE SAM NEAR 40.0N 53.5W. MAXIMUM 
SUSTAINED WINDS 90 KT GUSTS 110 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 30 HOUR FORECAST WITHIN 20N35W TO 21N37W TO 27N37W TO
28N35W TO 20N35W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN NE TO E
SWELL.
.48 HOUR FORECAST WITHIN 17N35W TO 20N38W TO 25N39W TO 28N38W TO
29N35W TO 17N35W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN NE TO E
SWELL.

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

$$
.FORECASTER CHRISTENSEN. NATIONAL HURRICANE CENTER.