801 FZNT02 KNHC 181019 HSFAT2 HIGH SEAS FORECAST NWS NATIONAL HURRICANE CENTER MIAMI FL 1030 UTC WED AUG 18 2021 SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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 0600 UTC WED AUG 18. 24 HOUR FORECAST VALID 0600 UTC THU AUG 19. 48 HOUR FORECAST VALID 0600 UTC FRI AUG 20. .WARNINGS. ...ATLC TROPICAL STORM WARNING... .TROPICAL STORM HENRI NEAR 30.1N 65.7W 998 MB AT 0900 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 60 NM OF CENTER EXCEPT 30 NM SW QUADRANT WITH SEAS TO 17 FT. ELSEWHERE WITHIN 30N64W TO 29N65W TO 30N66W TO 31N66W TO 31N64W TO 30N64W WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. REMAINDER OF AREA WITHIN 29N64W TO 30N67W TO 31N68W TO 30N66W TO 31N64W TO 29N64W WINDS 20 KT OR LESS. SEAS 8 TO 9 FT IN MIXED SWELL. .24 HOUR FORECAST TROPICAL STORM HENRI NEAR 29.8N 68.7W. MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE WINDS WITHIN 60 NM E SEMICIRCLE...20 NM SW QUADRANT AND 50 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 90 NE QUADRANT...60 NM SE AND NW QUADRANTS AND 30 NM SW QUADRANT WITH SEAS TO 21 FT. ELSEWHERE WITHIN 30N67W TO 29N68W TO 30N69W TO 31N69W TO 31N67W TO 30N67W WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. REMAINDER OF AREA WITHIN 29N68W TO 30N70W TO 29N71W TO 31N72W TO 31N66W TO 29N68W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL. .48 HOUR FORECAST TROPICAL STORM HENRI NEAR 30.4N 71.8W. MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE WINDS WITHIN 80 NM E SEMICIRCLE...40 NM SW QUADRANT AND 50 NM NW QUADRANT. LITTLE CHANGE IN RADIUS OF SEAS 12 FT OR GREATER WITH SEAS TO 23 FT. ELSEWHERE WITHIN 30N71W TO 30N72W TO 31N72W TO 31N70W TO 30N71W WINDS 20 TO 60 KT. SEAS 8 TO 12 FT. REMAINDER OF AREA WITHIN 30N70W TO 29N74W TO 31N75W TO 30N72W TO 31N69W TO 30N70W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL. .60 HOUR FORECAST HURRICANE HENRI NEAR 31.4N 72.3W. MAXIMUM SUSTAINED WINDS 65 KT GUSTS 80 KT. .72 HOUR FORECAST HURRICANE HENRI NEAR 33.0N 71.9W. MAXIMUM SUSTAINED WINDS 70 KT GUSTS 85 KT. EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE. .96 HOUR FORECAST HURRICANE HENRI NEAR 37.6N 69.0W. MAXIMUM SUSTAINED WINDS 75 KT GUSTS 90 KT. .120 HOUR FORECAST HURRICANE HENRI NEAR 40.5N 66.1W. 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. ...CARIBBEAN AND GULF OF MEXICO HURRICANE WARNING... .TROPICAL STORM GRACE NEAR 18.8N 80.9W 998 MB AT 0900 UTC AUG 18 MOVING W OR 280 DEG AT 14 KT. MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 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 60 NM OF CENTER EXCEPT 120 NM NE QUADRANT WITH SEAS TO 18 FT. ELSEWHERE WITHIN 18N79W TO 18N81W TO 20N81W TO 20N78W TO 19N78W TO 18N79W WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. REMAINDER OF AREA WITHIN 17N78W TO 18N82W TO 21N83W TO 22N81W TO 20N76W TO 17N78W WINDS 20 KT. SEAS 8 TO 10 FT IN MIXED SWELL. .24 HOUR FORECAST HURRICANE GRACE NEAR 19.9N 86.4W. MAXIMUM SUSTAINED WINDS 75 KT GUSTS 90 KT. LITTLE CHANGE IN RADIUS OF TROPICAL STORM FORCE WINDS AND SEAS 12 FT OR GREATER WITH SEAS TO 26 FT. LITTLE CHANGE ELSEWHERE. .36 HOUR FORECAST TROPICAL STORM GRACE INLAND THE YUCATAN PENINSULA NEAR 20.3N 89.4W. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. .48 HOUR FORECAST TROPICAL STORM GRACE OVER THE GULF OF MEXICO NEAR NEAR 20.6N 92.1W. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE WINDS WITHIN 100 NM NE QUADRANT...40 NM SE QUADRANT...30 NM SW QUADRANT...AND 80 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 240 NM NE...90 NM SE QUADRANT...60 NM SW QUADRANT AND 90 NM NW QUADRANT WITH SEAS TO 19 FT. ELSEWHERE WITHIN 22N87W TO 21N89W TO 19N91W TO 22N94W TO 26N92W TO 22N87W...AND WITHIN 60 NM OF CAMPECHE WINDS 20 TO 33 KT. SEAS 10 TO 14 FT. .60 HOUR FORECAST HURRICANE GRACE NEAR 20.7N 94.4W. MAXIMUM SUSTAINED WINDS 65 KT GUSTS 80 KT. .72 HOUR FORECAST HURRICANE GRACE NEAR 20.7N 96.8W. 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 MEXICO NEAR 20.6N 101.4W. MAXIMUM SUSTAINED WINDS 35 KT GUSTS 45 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. .SYNOPSIS AND FORECAST. .CARIBBEAN 12 HOUR FORECAST WITHIN 11N71W TO 12N72W TO 12N74W TO 14N74W TO 13N71W TO 11N71W NE TO E WINDS 20 TO 25 KT. SEAS TO 8 FT. .24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. .CARIBBEAN 42 HOUR FORECAST WITHIN 16N85W TO 16N86W TO 18N87W TO 18N86W TO 17N85W TO 16N85W...INCLUDING THE GULF OF HONDURAS...E TO SE WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT. .48 HOUR FORECAST LITTLE CHANGE. .REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. $$ .FORECASTER AGUIRRE. NATIONAL HURRICANE CENTER.