000
FZNT02 KNHC 182054
HSFAT2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 UTC WED AUG 18 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 WED AUG 18.
24 HOUR FORECAST VALID 1800 UTC THU AUG 19.
48 HOUR FORECAST VALID 1800 UTC FRI AUG 20.

.WARNINGS.

...CARIBBEAN AND GULF OF MEXICO HURRICANE WARNING...
.HURRICANE GRACE NEAR 19.7N 83.7W 992 MB AT 2100 UTC AUG 18
MOVING WNW OR 285 DEG AT 14 KT. MAXIMUM SUSTAINED WINDS 70 KT
GUSTS 85 KT. TROPICAL STORM FORCE WINDS WITHIN 120 NM NE
QUADRANT...90 NM SE QUADRANT...0 NM SW QUADRANT...AND 80 NM NW
QUADRANT.  SEAS 12 FT OR GREATER WITHIN 180 NM NE QUADRANT...150
NM SE QUADRANT...60 NM SW QUADRANT...AND 120 NM NW QUADRANT WITH
SEAS TO 25 FT. ELSEWHERE WITHIN 19N80W TO 18N82W TO 18N84W TO 
22N85W TO 22N80W TO 19N80W WINDS 20 TO 33 KT. SEAS 10 TO 12 FT. 
REMAINDER AREA WITHIN 18N80W TO 18N82W TO 19N80W TO 22N81W TO 
20N79W TO 18N80W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED
SWELL.
.24 HOUR FORECAST TROPICAL STORM GRACE INLAND NEAR 20.7N 89.3W. 
MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT. TROPICAL STORM FORCE 
WINDS WITHIN 90 NM NE QUADRANT...40 NM SE QUADRANT...0 NM SW 
QUADRANT...AND 60 NM NW QUADRANT. SEAS 12 FT OR GREATER OVER 
FORECAST WATERS WITHIN 180 NM NE QUADRANT...180 NM SE 
QUADRANT...0 NM SW QUADRANT...AND 180 NM NW QUADRANT WITH SEAS TO
16 FT. ELSEWHERE WITHIN 21N85W TO 20N88W TO 21N92W TO 25N90W TO 
24N87W TO 21N85W WINDS 20 TO 33 KT. SEAS 9 TO 12 FT. REMAINDER 
AREA WITHIN 21N84W TO 19N87W TO 23N87W TO 25N90W TO 26N87W TO 
21N84W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN MIXED SWELL.
.48 HOUR FORECAST HURRICANE GRACE OVER WATER NEAR 20.8N 94.6W. 
MAXIMUM SUSTAINED WINDS 70 KT GUSTS 85 KT. TROPICAL STORM FORCE 
WINDS WITHIN 120 NM NE QUADRANT...90 NM SE QUADRANT...40 NM SW 
QUADRANT...AND 100 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 
180 NM NE QUADRANT...90 NM SE QUADRANT...120 NM SW QUADRANT...AND
150 NM NW QUADRANT WITH SEAS TO 27 FT. ELSEWHERE WITHIN 22N90W 
TO 19N94W TO 21N96W TO 25N94W TO 25N91W TO 22N90W WINDS 20 TO 33 
KT. SEAS 10 TO 12 FT. REMAINDER AREA WITHIN 23N90W TO 19N93W TO 
19N96W TO 26N97W TO 28N93W TO 23N90W WINDS 20 KT OR LESS. SEAS 8 
TO 11 FT IN MIXED SWELL.
.72 HOUR FORECAST TROPICAL DEPRESSION GRACE INLAND NEAR 20.0N 
99.9W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST POST-TROPICAL GRACE NEAR 19.5N 104.0W. MAXIMUM
SUSTAINED WINDS 20 KT GUSTS 30 KT.
.120 HOUR FORECAST...DISSIPATED.

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

...ATLANTIC HURRICANE WARNING...
.TROPICAL STORM HENRI NEAR 29.9N 67.6W 995 MB AT 2100 UTC AUG 18
MOVING W OR 265 DEG AT 8 KT. MAXIMUM SUSTAINED WINDS 60 KT GUSTS
75 KT. TROPICAL STORM FORCE WINDS WITHIN 50 NM N SEMICIRCLE...70
NM SE QUADRANT AND 40 NM SW QUADRANT. SEAS 12 FT OR GREATER 
WITHIN 75 NM N SEMICIRCLE AND 60 NM S SEMICIRCLE WITH SEAS TO 19 
FT. ELSEWHERE WITHIN 29N66W TO 29N67W TO 29N68W TO 31N68W TO 
31N65W TO 29N66W WINDS 20 TO 33 KT. SEAS 10 TO 12 FT. REMAINDER
AREA WITHIN 29N65W TO 28N67W TO 29N69W TO 31N70W TO 31N65W TO 
29N65W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.24 HOUR FORECAST TROPICAL STORM HENRI NEAR 29.8N 70.7W. MAXIMUM
SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE WINDS 
WITHIN 70 NM E SEMICIRCLE...50 NM SW QUADRANT AND 60 NM NW 
QUADRANT. SEAS 12 FT OR GREATER WITHIN 90 NM N SEMICIRCLE AND 75 
NM S SEMICIRCLE WITH SEAS TO 23 FT. ELSEWHERE WITHIN 29N69W TO 
29N71W TO 30N72W TO 31N71W TO 31N68W TO 29N69W WINDS 20 TO 33 KT.
SEAS 11 TO 12 FT. REMAINDER AREA WITHIN 28N70W TO 28N73W TO 
31N74W TO 31N67W TO 28N70W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT 
IN MIXED SWELL.
.36 HOUR FORECAST HURRICANE HENRI NEAR 30.1N 72.3W. MAXIMUM 
SUSTAINED WINDS 65 KT GUSTS 80 KT.
.48 HOUR FORECAST HURRICANE HENRI NEAR 31.0N 73.2W. MAXIMUM 
SUSTAINED WINDS 70 KT GUSTS 85 KT. TROPICAL STORM FORCE WINDS 
WITHIN 60 NM W SEMICIRCLE...80 NM NE QUADRANT AND 90 NM SE 
QUADRANT. SEAS 12 FT OR GREATER WITHIN 120 NM N SEMICIRCLE AND 90
NM S SEMICIRCLE WITH SEAS TO 23 FT. ELSEWHERE WITHIN 30N71W TO 
30N73W TO 31N73W TO 31N70W TO 30N71W WINDS 20 TO 33 KT. SEAS 10 
TO 12 FT. REMAINDER AREA WITHIN 29N71W TO 29N73W TO 30N75W TO 
31N76W TO 31N69W TO 29N71W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT 
IN MIXED SWELL.
.72 HOUR FORECAST HURRICANE HENRI NEAR 35.2N 71.7W. MAXIMUM 
SUSTAINED WINDS 80 KT GUSTS 100 KT. 
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST HURRICANE HENRI NEAR 39.3N 70.0W. MAXIMUM 
SUSTAINED WINDS 70 KT GUSTS 85 KT.
.120 HOUR FORECAST TROPICAL STORM HENRI NEAR 41.4N 69.8W. 
MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 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 WITHIN 12N72W TO 11N74W TO 12N74W TO 13N74W TO 13N72W
TO 12N72W NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.18 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS 
LESS THAN 8 FT.

.CARIBBEAN 30 HOUR FORECAST WITHIN 16N85W TO 16N87W TO 18N87W TO
18N86W TO 16N85W...INCLUDING THE GULF OF HONDURAS... E TO SE
WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT.
.42 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 AL. NATIONAL HURRICANE CENTER.