000
FZNT02 KNHC 171522
HSFAT2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
1630 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1200 UTC TUE AUG 17.
24 HOUR FORECAST VALID 1200 UTC WED AUG 18.
48 HOUR FORECAST VALID 1200 UTC THU AUG 19.

.WARNINGS.

...ATLC TROPICAL STORM WARNING...
.TROPICAL STORM HENRI NEAR 30.4N 64.3W 1004 MB AT 1500 UTC AUG 
17 MOVING WSW OR 255 DEG AT 5 KT. MAXIMUM SUSTAINED WINDS 45 KT 
GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 30 NM E 
SEMICIRCLE...20 NM SW QUADRANT AND 0 NM NW QUADRANT. SEAS 12 FT 
OR GREATER WITHIN 45 NM NE QUADRANT WITH SEAS TO 13 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 30.3N 66.5W. MAXIMUM 
SUSTAINED WINDS 55 KT GUSTS 65 KT. TROPICAL STORM FORCE WINDS 
WITHIN 40 NM E SEMICIRCLE...20 NM SW QUADRANT AND 30 NM NW 
QUADRANT. SEAS 12 FT OR GREATER WITHIN 60 NM N SEMICIRCLE WITH 
SEAS TO 14 FT. ELSEWHERE WITHIN 120 NM OF CENTER...EXCEPT 75 NM 
SW QUADRANT WINDS 20 TO 33 KT. SEAS 8 TO 12 FT.
.48 HOUR FORECAST TROPICAL STORM HENRI NEAR 30.4N 69.7W. MAXIMUM 
SUSTAINED WINDS 55 KT GUSTS 65 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 90 NM N SEMICIRCLE AND 
60 NM SE QUADRANT WITH SEAS TO 16 FT. ELSEWHERE WITHIN 120 NM OF 
CENTER...EXCEPT 90 NM SW QUADRANT WINDS 20 TO 33 KT. SEAS 8 TO 
12 FT.
.72 HOUR FORECAST TROPICAL STORM HENRI NEAR 31.6N 71.3W. MAXIMUM 
SUSTAINED WINDS 55 KT GUSTS 65 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST TROPICAL STORM HENRI NEAR 34.1N 69.6W. MAXIMUM 
SUSTAINED WINDS 55 KT GUSTS 65 KT.
.120 HOUR FORECAST TROPICAL STORM HENRI NEAR 37.4N 66.0W.
MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT.

...CARIBBEAN AND GULF OF MEXICO HURRICANE WARNING... 
.TROPICAL STORM GRACE NEAR 18.3N 76.8W 1005 MB AT 1500 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 E 
SEMICIRCLE. SEAS TO 12 FT WITHIN 60 NM NE QUADRANT. ELSEWHERE 
WITHIN 90 NM E SEMICIRCLE WINDS 20 TO 33 KT. SEAS 8 TO 12 FT.
.24 HOUR FORECAST HURRICANE GRACE NEAR 19.2N 82.2W. MAXIMUM 
SUSTAINED WINDS 65 KT GUSTS 80 KT. TROPICAL STORM FORCE WINDS 
WITHIN 60 NM E SEMICIRCLE AND 40 NM NW QUADRANT. SEAS 12 FT OR 
GREATER WITHIN 120 NM OF CENTER...EXCEPT 45 NM SW QUADRANT WITH 
SEAS TO 24 FT. ELSEWHERE FROM 17N TO 22N BETWEEN 76W AND 82W... 
AND FROM 18N TO 22N BETWEEN 82W AND 84W WINDS 20 TO 33 KT. SEAS 
8 TO 12 FT.
.48 HOUR FORECAST HURRICANE GRACE INLAND NEAR 20.4N 88.3W.
MAXIMUM SUSTAINED WINDS 65 KT GUSTS 80 KT. TROPICAL STORM FORCE 
WINDS WITHIN 100 NM NE QUADRANT...80 NM SE QUADRANT...30 NM SW 
QUADRANT...AND 70 NM NW QUADRANT. OVER FORECAST WATERS SEAS 12 
FT OR GREATER WITHIN 180 NM NE SEMICIRCLE WITH SEAS TO 18 FT. 
ELSEWHERE OVER THE CARIBBEAN WATERS FROM 18N TO 22N BETWEEN 84W 
AND 87W...INCLUDING THE YUCATAN CHANNEL...AND FROM 21N TO 25N 
BETWEEN 85W AND 90W OVER THE GULF OF MEXICO WATERS WINDS 20 TO 
33 KT. SEAS 8 TO 12 FT.
.60 HOUR FORECAST TROPICAL STORM GRACE OVER WATER NEAR 20.9N 
91.3W. MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT.
.72 HOUR FORECAST HURRICANE GRACE NEAR 21.1N 94.0W. MAXIMUM 
SUSTAINED WINDS 65 KT GUSTS 80 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE GRACE INLAND NEAR 21.5N 98.5W.
MAXIMUM SUSTAINED WINDS 65 KT GUSTS 80 KT.
.120 HOUR FORECAST POST-TROPICAL GRACE NEAR 21.5N 103.0W.
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.

FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE 
USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE 
AND INTENSITY.

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 17N BETWEEN 68W AND 72W...AND FROM 15N 
TO 18N BETWEEN 72W AND 75W E TO SE WINDS 20 TO 25 KT. SEAS LESS 
THAN 8 FT.
.24 HOUR FORECAST FROM 12N TO 18N BETWEEN 70W AND 77W...AND FROM 
15N TO 18N BETWEEN 77W AND 80W E TO SE WINDS 20 TO 25 KT. SEAS 
TO 8 FT N OF 15N. 
.48 HOUR FORECAST FROM 12N TO 17.5N BETWEEN 68W AND 76W NE TO E 
WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.

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

$$
.FORECASTER GR. NATIONAL HURRICANE CENTER.