000
FZNT02 KNHC 172108
HSFAT2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 UTC TUE AUG 17 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 AUG 17.
24 HOUR FORECAST VALID 1800 UTC WED AUG 18.
48 HOUR FORECAST VALID 1800 UTC THU AUG 19.

.WARNINGS.

...ATLC TROPICAL STORM WARNING...
.TROPICAL STORM HENRI NEAR 30.4N 64.5W 1000 MB AT 2100 UTC AUG 
17 MOVING WSW OR 255 DEG AT 2 KT. MAXIMUM SUSTAINED WINDS 55 KT 
GUSTS 65 KT. TROPICAL STORM FORCE WINDS WITHIN 60 NM E 
SEMICIRCLE AND 40 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 
60 NM E SEMICIRCLE WITH SEAS TO 15 FT. ELSEWHERE WITHIN 120 NM 
OF CENTER...EXCEPT 75 NM SW QUADRANT WINDS 20 TO 33 KT. SEAS 8 
TO 12 FT.
.24 HOUR FORECAST TROPICAL STORM HENRI NEAR 30.2N 67.0W. MAXIMUM 
SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE WINDS 
WITHIN 60 NM E SEMICIRCLE...20 NM SW QUADRANT AND 40 NM NW 
QUADRANT. SEAS 12 FT OR GREATER WITHIN 75 NM N SEMICIRCLE WITH 
SEAS TO 16 FT. ELSEWHERE WITHIN 150 NM OF CENTER...EXCEPT 90 NM 
SW QUADRANT WINDS 20 TO 33 KT. SEAS 8 TO 12 FT.
.48 HOUR FORECAST TROPICAL STORM HENRI NEAR 30.3N 70.0W. MAXIMUM 
SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE WINDS 
WITHIN 70 NM NE QUADRANT...60 NM SE QUADRANT...30 NM SW 
QUADRANT...AND 50 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 
90 NM N SEMICIRCLE AND 60 NM SE QUADRANT WITH SEAS TO 18 FT. 
ELSEWHERE WITHIN 150 NM OF CENTER...EXCEPT 90 NM SW QUADRANT 
WINDS 20 TO 33 KT. SEAS 8 TO 12 FT.
.72 HOUR FORECAST HURRICANE HENRI NEAR 32.0N 71.5W. MAXIMUM 
SUSTAINED WINDS 65 KT GUSTS 80 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE HENRI NEAR 35.5N 69.6W. MAXIMUM 
SUSTAINED WINDS 65 KT GUSTS 80 KT.
.120 HOUR FORECAST HURRICANE HENRI NEAR 39.1N 65.2W. MAXIMUM 
SUSTAINED WINDS 65 KT GUSTS 80 KT.

...CARIBBEAN AND GULF OF MEXICO HURRICANE WARNING... 
.TROPICAL STORM GRACE NEAR 18.4N 77.9W 1003 MB AT 2100 UTC AUG 
17 MOVING W OR 280 DEG AT 13 KT. MAXIMUM SUSTAINED WINDS 45 KT 
GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 60 NM NW AND SE 
QUADRANTS...70 NM NE QUADRANT AND 0 NM SW QUADRANT. SEAS 12 FT 
OR GREATER WITHIN 90 NM NE QUADRANT WITH SEAS TO 16 FT. 
ELSEWHERE FROM 16.5N TO 19.5N BETWEEN 74W AND 78W...AND FROM 18N 
TO 19.5N BETWEEN 78W AND 79W WINDS 20 TO 33 KT. SEAS 8 TO 12 FT.
.24 HOUR FORECAST HURRICANE GRACE NEAR 19.4N 83.4W. MAXIMUM 
SUSTAINED WINDS 70 KT GUSTS 85 KT. TROPICAL STORM FORCE WINDS 
WITHIN 70 NM NE QUADRANT...80 NM SE QUADRANT AND 60 NM NW 
QUADRANT. SEAS 12 FT OR GREATER WITHIN 120 NM OF CENTER...EXCEPT 
60 NM SW QUADRANT WITH SEAS TO 24 FT. ELSEWHERE FROM 17N TO 22N 
BETWEEN 76W AND 83W...AND FROM 18N TO 22N BETWEEN 83W AND 85W 
WINDS 20 TO 33 KT. SEAS 8 TO 12 FT.
.48 HOUR FORECAST TROPICAL STORM GRACE INLAND NEAR 20.5N 89.7W.
MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE 
WINDS WITHIN 100 NM NE QUADRANT...40 NM SE QUADRANT...30 NM SW 
QUADRANT...AND 70 NM NW QUADRANT. OVER FORECAST WATERS SEAS 12 
FT OR GREATER FROM 20.5N TO 22N BETWEEN 86W AND 87W...INCLUDING 
THE YUCATAN CHANNEL...AND FROM 22N TO 24N BETWEEN 86W AND 90W 
WITH SEAS TO 18 FT. ELSEWHERE OVER THE CARIBBEAN WATERS FROM 16N 
TO 22N BETWEEN 84W AND 87W...INCLUDING THE YUCATAN CHANNEL...AND 
FROM 21N TO 25N BETWEEN 85W AND 91W OVER THE GULF OF MEXICO 
WATERS WINDS 20 TO 33 KT. SEAS 8 TO 12 FT.
.60 HOUR FORECAST HURRICANE GRACE OVER WATER NEAR 20.9N 92.2W.
MAXIMUM SUSTAINED WINDS 65 KT GUSTS 80 KT.
.72 HOUR FORECAST HURRICANE GRACE NEAR 21.2N 94.8W. MAXIMUM 
SUSTAINED WINDS 75 KT GUSTS 90 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST TROPICAL STORM GRACE INLAND NEAR 21.0N 99.5W.
MAXIMUM SUSTAINED WINDS 40 KT GUSTS 50 KT.
.120 HOUR FORECAST POST-TROPICAL GRACE NEAR 21.0N 103.0W.
MAXIMUM SUSTAINED WINDS 20 KT GUSTS 30 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.

.CARIBBEAN FROM 12N TO 15N BETWEEN 68W AND 72W E WINDS 20 TO 25 
KT. SEAS LESS THAN 8 FT.
.24 HOUR FORECAST FROM 12N TO 15N BETWEEN 70W AND 77W E WINDS 20 
TO 25 KT. SEAS LESS THAN 8 FT.
.36 HOUR FORECAST FROM 11.5N TO 16N BETWEEN 70W AND 77W NE TO E 
WINDS 20 TO 25 KT. SEAS TO 8 FT.
.48 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

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

$$
.FORECASTER GR. NATIONAL HURRICANE CENTER.