000
FZNT02 KNHC 201538
HSFAT2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
1630 UTC FRI OCT 20 2023

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC FRI OCT 20.
24 HOUR FORECAST VALID 1200 UTC SAT OCT 21.
48 HOUR FORECAST VALID 1200 UTC SUN OCT 22.

.WARNINGS.

...ATLC HURRICANE WARNING...
.HURRICANE TAMMY NEAR 14.1N 58.6W 992 MB AT 1500 UTC OCT 20
MOVING WNW OR 290 DEG AT 6 KT. MAXIMUM SUSTAINED WINDS 65 KT
GUSTS 80 KT. TROPICAL STORM FORCE WINDS WITHIN 110 NM NE
QUADRANT...120 NM SE QUADRANT...20 NM SW QUADRANT...AND 80 NM NW
QUADRANT. SEAS 12 FT OR GREATER WITHIN 270 NM N SEMICIRCLE...180
NM SE QUADRANT AND 90 NM SW QUADRANT WITH SEAS TO 23 FT.
ELSEWHERE WITHIN 21N53W TO 26N60W TO 25N67W TO 21N66W
TO 13N60W TO 12N54W TO 21N53W WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. 
.24 HOUR FORECAST HURRICANE TAMMY NEAR 16.4N 60.9W. MAXIMUM 
SUSTAINED WINDS 75 KT GUSTS 90 KT. TROPICAL STORM FORCE WINDS 
WITHIN 110 NM E SEMICIRCLE...40 NM SW QUADRANT AND 70 NM NW 
QUADRANT. SEAS 12 FT OR GREATER WITHIN 240 NM N SEMICIRCLE...120
NM SE SEMICIRCLE AND 45 NM SW SEMICIRCLE WITH SEAS TO 25 FT. 
ELSEWHERE WITHIN 23N56W TO 25N64W TO 21N66W TO 15N60W TO 15N57W 
TO 19N55W TO 23N56W WINDS 20 TO 33 KT. SEAS 8 TO 12 FT.
.48 HOUR FORECAST HURRICANE TAMMY NEAR 19.3N 62.7W. MAXIMUM 
SUSTAINED WINDS 80 KT GUSTS 100 KT. LITTLE CHANGE. TROPICAL STORM
FORCE WINDS AND SEAS 12 FT OR GREATER. ELSEWHERE WITHIN 22N58W 
TO 26N61W TO 24N65W TO 19N66W TO 18N63W TO 18N59W TO 22N58W WINDS
20 TO 33 KT. SEAS 8 TO 12 FT.
.72 HOUR FORECAST HURRICANE TAMMY NEAR 22.0N 63.3W. MAXIMUM 
SUSTAINED WINDS 80 KT GUSTS 100 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE TAMMY NEAR 24.4N 61.4W. MAXIMUM 
SUSTAINED WINDS 80 KT GUSTS 100 KT.
.120 HOUR FORECAST HURRICANE TAMMY NEAR 28.2N 57.7W. MAXIMUM 
SUSTAINED WINDS 75 KT GUSTS 90 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 12 HOUR FORECAST COLD FRONT APPROACHING FROM W. WITHIN 
31N64W TO 31N69W TO 30N69W TO 29N67W TO 29N66W TO 30N64W TO 
31N64W S WINDS 20 TO 30 KT. SEAS 8 TO 10 FT.
.24 HOUR FORECAST COLD FRONT FROM 31N78W TO 29N81W. WITHIN 
31N59W TO 31N69W TO 25N68W TO 25N61W TO 31N59W S WINDS 20 TO 30 
KT. SEAS 9 TO 11 FT IN SE SWELL. ELSEWHERE WITHIN 31N69W TO 
31N81W TO 30N80W TO 28N77W TO 28N73W TO 31N69W W WINDS 20 TO 30 
KT. SEAS 9 TO 11 FT IN W TO NW SWELL.
.48 HOUR FORECAST COLD FRONT FROM 31N67W TO 39N74W THEN
DISSIPATING FRONT TO 28N81W. WITHIN 31N61W TO 31N73W TO 29N72W 
TO 27N68W TO 28N65W TO 31N61W WINDS 20 KT OR LESS. SEAS 8 TO 10 
FT IN W TO NW SWELL.

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

$$
.FORECASTER CHRISTENSEN. NATIONAL HURRICANE CENTER.