819 
FZNT02 KNHC 151003
HSFAT2

HIGH SEAS FORECAST  
NWS NATIONAL HURRICANE CENTER MIAMI FL 
1030 UTC SAT SEP 15 2018

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 SAT SEP 15.
24 HOUR FORECAST VALID 0600 UTC SUN SEP 16.
48 HOUR FORECAST VALID 0600 UTC MON SEP 17.
 
.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM HELENE NEAR 37.7N 34.8W 988 MB AT 0900 UTC SEP 
15 MOVING NNE OR 020 DEG AT 19 KT. MAXIMUM SUSTAINED WINDS 60 KT 
GUSTS 75 KT. TROPICAL STORM FORCE WINDS WITHIN 140 NM E 
SEMICIRCLE...70 NM SW QUADRANT AND 120 NM NW QUADRANT.OVER 
FORECAST WATERS N OF 28N E OF 37W WINDS 20 KT OR LESS. SEAS 8 TO 
9 FT IN MIXED SWELL.
.24 HOUR FORECAST TROPICAL STORM HELENE NEAR 41.8N 29.2W.
MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT. TROPICAL STORM FORCE 
WINDS WITHIN 120 NM OF CENTER EXCEPT 150 NM SE QUADRANT. OVER 
FORECAST WATERS WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.48 HOUR FORECAST POST-TROPICAL EXTRATROPICAL HELENE NEAR 46.7N 
18.1W. MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT. TROPICAL STORM 
FORCE WINDS WITHIN 160 NM S SEMICIRCLE...140 NM NE QUADRANT AND 
120 NM NW QUADRANT. OVER FORECAST WATERS WINDS 20 KT OR LESS. 
SEAS LESS THAN 8 FT.
.72 HOUR FORECAST POST-TROPICAL EXTRATROPICAL HELENE NEAR 55.8N 
5.0W. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST...DISSIPATED.

...TROPICAL STORM WARNING...
.TROPICAL STORM JOYCE NEAR 31.9N 42.2W 997 MB AT 0900 UTC SEP 15 
MOVING E OR 085 DEG AT 7 KT. MAXIMUM SUSTAINED WINDS 45 KT GUSTS 
55 KT. TROPICAL STORM FORCE WINDS WITHIN 30 NM E SEMICIRCLE AND 
0 NM W SEMICIRCLE. SEAS 12 FT OR GREATER WITHIN 60 NM OF CENTER 
EXCEPT 0 NM SW QUADRANT WITH SEAS TO 14 FT. OVER FORECAST WATERS 
WITHIN 240 NM SE AND 180 NM SW QUADRANTS WINDS 20 TO 30 KT. SEAS 
9 TO 11 FT. ELSEWHERE N OF 28N BETWEEN 37W AND 52W WINDS 20 KT 
OR LESS. SEAS TO 10 FT IN MIXED SWELL.
.24 HOUR FORECAST TROPICAL STORM JOYCE NEAR 33.9N 37.8W. MAXIMUM 
SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE WINDS 
WITHIN 40 NM E SEMICIRCLE...30 NM SW QUADRANT AND 0 NM NW 
QUADRANT. OVER FORECAST WATERS N OF 30N BETWEEN 35W AND 40W SW 
WINDS 20 TO 25 KT. SEAS TO 9 FT. 
.48 HOUR FORECAST TROPICAL STORM JOYCE NEAR 34.7N 31.0W. MAXIMUM 
SUSTAINED WINDS 35 KT GUSTS 45 KT. TROPICAL STORM FORCE WINDS 
WITHIN 30 NM E SEMICIRCLE AND 0 NM W SEMICIRCLE. OVER FORECAST 
WATERS WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.
.72 HOUR FORECAST TROPICAL DEPRESSION JOYCE NEAR 33.0N 26.5W.
MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 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. 

.ATLC N OF 30.5N BETWEEN 74W AND 79W WINDS 20 KT OR LESS. SEAS 
TO 8 FT IN MIXED SWELL. ELSEWHERE N OF 19N BETWEEN 57W AND 72W 
WINDS 20 KT OR LESS. SEAS TO 10 FT IN MIXED SWELL. 
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.CARIBBEAN REMNANTS OF ISAAC NEAR 14.8N 70.8W 1006 MB AT 0900 
UTC SEP 15 MOVING W OR 270 DEG AT 14 KT. MAXIMUM SUSTAINED WINDS 
30 KT GUSTS 40 KT. WITHIN 180 NM NW QUADRANT WINDS 20 TO 30 KT. 
SEAS TO 10 FT. WITHIN 150 NM E SEMICIRCLE WINDS 20 TO 25 KT. 
SEAS TO 8 FT. SCATTERED TSTMS WITHIN 180 NM NW QUADRANT OF ISAAC 
AND N OF 15N BETWEEN 64W AND 68W.  
.12 HOUR FORECAST...LOW DISSIPATED. WITHIN 150 NM OF 15.5N72W 
WINDS 20 TO 25 KT. SEAS TO 9 FT. 
.24 HOUR FORECAST WITHIN 150 NM OF 16N73W WINDS 20 TO 25 KT. 
SEAS TO 8 FT.
.48 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 STRIPLING. NATIONAL HURRICANE CENTER.