000
FZNT02 KNHC 192101
HSFAT2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 UTC THU AUG 19 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 THU AUG 19.
24 HOUR FORECAST VALID 1800 UTC FRI AUG 20.
48 HOUR FORECAST VALID 1800 UTC SAT AUG 21.

.WARNINGS.

...GULF OF MEXICO HURRICANE WARNING... 
.TROPICAL STORM GRACE NEAR 20.6N 90.2W 999 MB AT 2100 UTC AUG 19
MOVING W OR 280 DEG AT 13 KT. MAXIMUM SUSTAINED WINDS 45 KT 
GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 140 NM NE 
QUADRANT...50 NM SE QUADRANT...40 NM SW QUADRANT...AND 130 NM NW 
QUADRANT. SEAS 12 FT OR GREATER WITHIN 180 NM N SEMICIRCLE AND 0 
NM S SEMICIRCLE WITH SEAS TO 15 FT. ELSEWHERE WITHIN 19N86W TO 
21N89W TO 20N92W TO 23N92W TO 24N87W TO 19N86W WINDS 20 TO 33 
KT. SEAS 9 TO 12 FT. REMAINDER AREA WITHIN 21N84W TO 19N84W TO 
19N87W TO 24N88W TO 25N86W TO 21N84W WINDS 20 KT OR LESS. SEAS 8 
TO 10 FT IN MIXED SWELL.
.24 HOUR FORECAST HURRICANE GRACE NEAR 20.7N 94.9W. MAXIMUM 
SUSTAINED WINDS 70 KT GUSTS 85 KT. TROPICAL STORM FORCE WINDS 
WITHIN 110 NM N SEMICIRCLE AND 80 NM S SEMICIRCLE. SEAS 12 FT OR 
GREATER WITHIN 210 NM N SEMICIRCLE AND 150 NM S SEMICIRCLE WITH 
SEAS TO 28 FT. ELSEWHERE WITHIN 20N93W TO 19N96W TO 21N97W TO 
25N96W TO 24N92W TO 20N93W WINDS 20 TO 33 KT. SEAS 11 TO 12 FT. 
REMAINDER AREA WITHIN 19N93W TO 23N98W TO 27N96W TO 28N93W TO 
24N90W TO 19N93W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN MIXED 
SWELL.
.48 HOUR FORECAST TROPICAL STORM GRACE INLAND NEAR 19.6N 99.4W. 
MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE 
WINDS WITHIN 0 NM S SEMICIRCLE...50 NM NE QUADRANT AND 20 NM NW 
QUADRANT. OVER FORECAST WATERS WITHIN 22N95W TO 21N97W TO 22N98W 
TO 23N97W TO 22N95W WINDS 20 TO 25 KT. SEAS 8 TO 9 FT. ELSEWHERE 
WITHIN 21N94W TO 21N97W TO 23N98W TO 27N97W TO 25N94W TO 21N94W 
WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.60 HOUR FORECAST...DISSIPATED.

...ATLANTIC HURRICANE WARNING...
.TROPICAL STORM HENRI NEAR 29.7N 71.4W 997 MB AT 2100 UTC AUG 19
MOVING W OR 270 DEG AT 9 KT. MAXIMUM SUSTAINED WINDS 55 KT GUSTS
65 KT. TROPICAL STORM FORCE WINDS WITHIN 60 NM NW AND SE
QUADRANTS...80 NM NE QUADRANT AND 40 NM SW QUADRANT.  SEAS 12 FT
OR GREATER WITHIN 90 NM N SEMICIRCLE...60 NM SE QUADRANT AND 75
NM SW QUADRANT WITH SEAS TO 25 FT. ELSEWHERE WITHIN 28N69W TO 
28N71W TO 30N73W TO 31N73W TO 31N68W TO 28N69W WINDS 20 TO 33 KT.
SEAS 11 TO 12 FT. REMAINDER AREA WITHIN 27N69W TO 27N74W TO 
31N74W TO 31N66W TO 27N69W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT 
IN MIXED SWELL.
.24 HOUR FORECAST TROPICAL STORM HENRI NEAR 31.0N 73.2W. MAXIMUM
SUSTAINED WINDS 55 KT GUSTS 65 KT. TROPICAL STORM FORCE WINDS 
WITHIN 90 NM E SEMICIRCLE...60 NM SW QUADRANT AND 50 NM NW 
QUADRANT. SEAS 12 FT OR GREATER WITHIN 90 NM N SEMICIRCLE...90 NM
SE QUADRANT AND 75 NM SW QUADRANT WITH SEAS TO 25 FT. ELSEWHERE 
OVER FORECAST WATERS WITHIN 30N71W TO 29N72W TO 30N74W TO 31N74W 
TO 31N70W TO 30N71W WINDS 20 TO 33 KT. SEAS 11 TO 12 FT. 
REMAINDER FORECAST WATERS WITHIN 30N69W TO 29N71W TO 29N74W TO 
31N77W TO 31N69W TO 30N69W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT 
IN MIXED SWELL.
.36 HOUR FORECAST HURRICANE HENRI NEAR 33.0N 72.6W. MAXIMUM 
SUSTAINED WINDS 65 KT GUSTS 80 KT.
.48 HOUR FORECAST HURRICANE HENRI NEAR 36.0N 71.3W. MAXIMUM 
SUSTAINED WINDS 75 KT GUSTS 90 KT. TROPICAL STORM FORCE WINDS 
WITHIN 100 NM NE QUADRANT...120 NM SE QUADRANT...90 NM SW 
QUADRANT...AND 70 NM NW QUADRANT. CONDITIONS MOVE N OF AREA. OVER
FORECAST WATERS WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.72 HOUR FORECAST HURRICANE HENRI NEAR 40.8N 70.1W. MAXIMUM 
SUSTAINED WINDS 65 KT GUSTS 80 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST TROPICAL STORM HENRI NEAR 42.3N 69.6W. MAXIMUM
SUSTAINED WINDS 50 KT GUSTS 60 KT.
.120 HOUR FORECAST POST-TROPICAL HENRI NEAR 43.6N 65.7W. MAXIMUM
SUSTAINED WINDS 40 KT GUSTS 50 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 12 HOUR FORECAST WITHIN 16N85W TO 16N88W TO 19N88W TO
19N86W TO 16N85W...INCLUDING THE GULF OF HONDURAS... E TO SE
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.

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

$$
.FORECASTER AL. NATIONAL HURRICANE CENTER.