000 FZNT02 KNHC 181501 HSFAT2 HIGH SEAS FORECAST NWS NATIONAL HURRICANE CENTER MIAMI FL 1630 UTC WED AUG 18 2021 SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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 1200 UTC WED AUG 18. 24 HOUR FORECAST VALID 1200 UTC THU AUG 19. 48 HOUR FORECAST VALID 1200 UTC FRI AUG 20. .WARNINGS. ...CARIBBEAN AND GULF OF MEXICO HURRICANE WARNING... .HURRICANE GRACE NEAR 19.4N 82.2W 992 MB AT 1500 UTC AUG 18 MOVING WNW OR 285 DEG AT 13 KT. MAXIMUM SUSTAINED WINDS 65 KT GUSTS 80 KT. TROPICAL STORM FORCE WINDS WITHIN 100 NM NE QUADRANT...90 NM SE QUADRANT...0 NM SW QUADRANT...AND 60 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 150 NM NE QUADRANT...120 NM SE QUADRANT...60 NM SW QUADRANT...AND 90 NM NW QUADRANT WITH SEAS TO 20 FT. ELSEWHERE WITHIN 17N79W TO 18N83W TO 21N84W TO 21N79W TO 20N78W TO 17N79W WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. .24 HOUR FORECAST HURRICANE GRACE INLAND NEAR 20.3N 87.6W. MAXIMUM SUSTAINED WINDS 75 KT GUSTS 90 KT. TROPICAL STORM FORCE WINDS WITHIN 120 NM NE QUADRANT...110 NM SE QUADRANT...20 NM SW QUADRANT...AND 60 NM NW QUADRANT. SEAS 12 FT OR GREATER OVER FORECAST WATERS WITHIN 150 NM NE QUADRANT...150 NM SE QUADRANT...0 NM SW QUADRANT...AND 120 NM NW QUADRANT WITH SEAS TO 18 FT. ELSEWHERE WITHIN 20N84W TO 22N87W TO 22N90W TO 24N88W TO 22N85W TO 20N84W WINDS 20 TO 33 KT. SEAS 10 TO 12 FT. REMAINDER AREA WITHIN 18N85W TO 17N88W TO 19N86W TO 22N84W TO 20N83W TO 18N85W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL. .36 HOUR FORECAST TROPICAL STORM GRACE OVER WATER NEAR 20.6N 90.5W. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. .48 HOUR FORECAST HURRICANE GRACE OVER WATER NEAR 20.7N 93.2W. MAXIMUM SUSTAINED WINDS 65 KT GUSTS 80 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...60 NM SE QUADRANT...30 NM SW QUADRANT...AND 150 NM NW QUADRANT WITH SEAS TO 22 FT. ELSEWHERE WITHIN 20N91W TO 20N95W TO 23N95W TO 25N91W TO 23N89W TO 20N91W WINDS 20 TO 33 KT. SEAS 9 TO 12 FT. REMAINDER AREA WITHIN 24N89W TO 19N92W TO 22N96W TO 26N96W TO 27N92W TO 24N89W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL. .72 HOUR FORECAST TROPICAL STORM GRACE INLAND NEAR 20.5N 97.7W. MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE. .96 HOUR FORECAST POST-TROPICAL GRACE NEAR 20.0N 103.0W. 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 TROPICAL STORM WARNING... .TROPICAL STORM HENRI NEAR 30.0N 66.6W 998 MB AT 1500 UTC AUG 18 MOVING W OR 260 DEG AT 7 KT. MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT. TROPICAL STORM FORCE WINDS WITHIN 50 NM N SEMICIRCLE...70 NM SE QUADRANT AND 0 NM SW QUADRANT. SEAS 12 FT OR GREATER WITHIN 75 NM N SEMICIRCLE AND 60 NM S SEMICIRCLE WITH SEAS TO 17 FT. ELSEWHERE WITHIN 29N65W TO 29N66W TO 30N68W TO 31N67W TO 31N64W TO 29N65W WINDS 20 TO 33 KT. SEAS 10 TO 12 FT. REMAINDER AREA WITHIN 29N65W TO 29N67W TO 29N69W TO 31N69W TO 31N63W TO 29N65W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL. .24 HOUR FORECAST TROPICAL STORM HENRI NEAR 29.8N 69.8W. MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE WINDS WITHIN 60 NM E SEMICIRCLE...30 NM SW QUADRANT AND 50 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 90 NM N SEMICIRCLE AND 60 NM S SEMICIRCLE WITH SEAS TO 22 FT. ELSEWHERE WITHIN 29N69W TO 29N70W TO 30N71W TO 31N71W TO 31N68W TO 29N69W WINDS 20 TO 33 KT. SEAS 11 TO 12 FT. REMAINDER AREA WITHIN 29N69W TO 28N72W TO 29N73W TO 31N73W TO 31N66W TO 29N69W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN MIXED SWELL. .48 HOUR FORECAST TROPICAL STORM HENRI NEAR 30.7N 72.4W. MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE WINDS WITHIN 50 NM W SEMICIRCLE...80 NM NE QUADRANT AND 90 NM SE QUADRANT. SEAS 12 FT OR GREATER WITHIN 120 NM N SEMICIRCLE AND 75 NM S SEMICIRCLE WITH SEAS TO 23 FT. ELSEWHERE WITHIN 30N70W TO 30N71W TO 30N73W TO 31N73W TO 31N70W TO 30N70W WINDS 20 TO 33 KT. SEAS 10 TO 12 FT. REMAINDER AREA WITHIN 30N70W TO 29N72W TO 29N74W TO 31N76W TO 31N69W TO 30N70W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN MIXED SWELL. .60 HOUR FORECAST HURRICANE HENRI NEAR 32.1N 72.5W. MAXIMUM SUSTAINED WINDS 65 KT GUSTS 80 KT. .72 HOUR FORECAST HURRICANE HENRI NEAR 34.2N 71.5W. MAXIMUM SUSTAINED WINDS 75 KT GUSTS 90 KT. EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE. .96 HOUR FORECAST HURRICANE HENRI NEAR 38.0N 69.6W. MAXIMUM SUSTAINED WINDS 75 KT GUSTS 90 KT. .120 HOUR FORECAST HURRICANE HENRI NEAR 41.0N 67.0W. MAXIMUM SUSTAINED WINDS 65 KT GUSTS 80 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 12N75W TO 12N76W TO 13N76W TO 13N74W TO 12N75W E WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT. .24 HOUR FORECAST CONDITIONS IMPROVE. WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. .CARIBBEAN 36 HOUR FORECAST WITHIN 17N85W TO 17N86W TO 16N86W TO 18N88W TO 18N86W TO 17N85W...INCLUDING THE GULF OF HONDURAS... E TO SE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT. .48 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.