000 FZNT02 KNHC 311615 HSFAT2 HIGH SEAS FORECAST NWS NATIONAL HURRICANE CENTER MIAMI FL 1630 UTC THU AUG 31 2017 SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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. PAN PAN ATLANTIC FROM 07N TO 31N W OF 35W INCLUDING CARIBBEAN SEA AND GULF OF MEXICO SYNOPSIS VALID 1200 UTC THU AUG 31. 24 HOUR FORECAST VALID 1200 UTC FRI SEP 01. 48 HOUR FORECAST VALID 1200 UTC SAT SEP 02. .WARNINGS. ...HURRICANE WARNING... .HURRICANE IRMA NEAR 16.9N 33.8W 979 MB AT 1500 UTC AUG 31 MOVING WNW OR 290 DEG AT 9 KT. MAXIMUM SUSTAINED WINDS 85 KT GUSTS 105 KT. TROPICAL STORM FORCE WINDS WITHIN 70 NM NE QUADRANT...50 NM SE QUADRANT...40 NM SW QUADRANT...AND 60 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 60 NM NW AND SE QUADRANTS...90 NM NE QUADRANT AND 30 NM SW QUADRANT WITH SEAS TO 26 FT. OVER FORECAST WATERS WITHIN 180 NM NW QUADRANT AND 120 NM SW QUADRANT WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. .24 HOUR FORECAST HURRICANE IRMA NEAR 18.0N 37.1W. MAXIMUM SUSTAINED WINDS 105 KT GUSTS 130 KT. TROPICAL STORM FORCE WINDS WITHIN 90 NM NE QUADRANT...70 NM SE QUADRANT...60 NM SW QUADRANT...AND 80 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 240 NM N AND 120 NM S SEMICIRCLES WITH SEAS TO 32 FT. ELSEWHERE OVER FORECAST WATERS WITHIN 360 NM NE AND 210 NM SW SEMICIRCLES WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. .48 HOUR FORECAST HURRICANE IRMA NEAR 18.1N 41.6W. MAXIMUM SUSTAINED WINDS 105 KT GUSTS 130 KT. TROPICAL STORM FORCE WINDS WITHIN 100 NM N SEMICIRCLE...70 NM SE QUADRANT AND 60 NM SW QUADRANT. SEAS 12 FT OR GREATER WITHIN 390 NM N AND 120 NM S SEMICIRCLES WITH SEAS TO 35 FT. ELSEWHERE WITHIN 420 NM N AND 150 NM S SEMICIRCLES WINDS 20 TO 33 KT. SEAS 8 TO 12 FT IN MIXED SWELL. REMAINDER OF AREA N OF 25N E OF 50W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL. .72 HOUR FORECAST HURRICANE IRMA NEAR 17.0N 46.5W. MAXIMUM SUSTAINED WINDS 110 KT GUSTS 135 KT. EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE. .96 HOUR FORECAST HURRICANE IRMA NEAR 16.0N 51.0W. MAXIMUM SUSTAINED WINDS 110 KT GUSTS 135 KT. .120 HOUR FORECAST HURRICANE IRMA NEAR 16.0N 55.5W. MAXIMUM SUSTAINED WINDS 115 KT GUSTS 140 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. .ATLC 12 HOUR FORECAST N OF 30N BETWEEN 55W AND 60W WINDS 20 KT OR LESS. SEAS 8 FT IN NE SWELL. .24 HOUR FORECAST N OF 29N BETWEEN 50W AND 66W...WINDS 20 KT OR LESS. SEAS TO 9 FT IN NE SWELL. .36 HOUR FORECAST N OF 29N BETWEEN 50W AND 65W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN NE SWELL. .48 HOUR FORECAST N OF A LINE FROM 31N40W TO 25N50W TO 25N58W TO 31N58W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN NE SWELL. .CARIBBEAN FROM 11N TO 13.5N BETWEEN 70W AND 74W...INCLUDING THE GULF OF VENEZUELA NE TO E WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT. .24 HOUR FORECAST FROM 11N TO 15N BETWEEN 70W AND 76W... INCLUDING THE GULF OF VENEZUELA...NE TO E WINDS 20 TO 25 KT. SEAS BUILDING TO 8 FT. FROM 15N TO 17.5N BETWEEN 70W AND 74W E WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT. .48 HOUR FORECAST FROM 11N TO 15N BETWEEN 69W AND 78W... INCLUDING THE GULF OF VENEZUELA...NE TO E WINDS 20 TO 25 KT. SEAS TO 9 FT. FROM 15N TO 17.5N BETWEEN 70W AND 76W E WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT. .GULF OF MEXICO N OF 28N BETWEEN 87W AND 93W S TO SW WINDS 20 TO 25 KT. SEAS TO 8 FT. .12 HOUR FORECAST N OF 29N BETWEEN 86W AND 92W S TO SW WINDS 20 TO 25 KT. SEAS TO 8 FT E OF 90W. .24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. .REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. $$ .FORECASTER MT. NATIONAL HURRICANE CENTER.