000
FZNT02 KNHC 211441
HSFAT2

HIGH SEAS FORECAST 
NWS NATIONAL HURRICANE CENTER MIAMI FL                     
1630 UTC MON SEP 21 2015

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 MON SEP 21.
24 HOUR FORECAST VALID 1200 UTC TUE SEP 22.
48 HOUR FORECAST VALID 1200 UTC WED SEP 23.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM IDA NEAR 20.6N 48.0W 1003 MB AT 1500 UTC SEP 21 
MOVING NNW OR 330 DEG AT 6 KT. MAXIMUM SUSTAINED WINDS 45 KT 
GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 150 NM E 
SEMICIRCLE...0 NM SW QUADRANT AND 40 NM NW QUADRANT. SEAS 12 FT 
OR GREATER WITHIN 210 NM NE QUADRANT...120 NM SE QUADRANT...75 
NM SW QUADRANT...AND 180 NM NW QUADRANT WITH SEAS TO 24 FT. 
ELSEWHERE WITHIN 240 NM OF CENTER...EXCEPT 75 NM W QUADRANT 
WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. WITHIN 210 NM E OF A LINE 
FROM 31N54W TO 24N48W SE WINDS 20 TO 30 KT. SEAS 8 TO 11 FT. 
REMAINDER OF AREA N OF 15N BETWEEN 42W AND 53W WINDS 20 KT OR 
LESS. SEAS 8 TO 11 FT IN MIXED SWELL. NUMEROUS MODERATE ISOLATED 
STRONG WITHIN 330 NM E QUADRANT AND 60 NM ELSEWHERE OF CENTER.
.24 HOUR FORECAST TROPICAL STORM IDA NEAR 21.3N 47.7W. MAXIMUM 
SUSTAINED WINDS 55 KT GUSTS 65 KT. TROPICAL STORM FORCE WINDS 
WITHIN 150 NM NE QUADRANT...130 NM SE QUADRANT...50 NM SW 
QUADRANT...AND 60 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 
240 NM N SEMICIRCLE AND 90 NM S SEMICIRCLE WITH SEAS TO 26 FT. 
ELSEWHERE WITHIN 240 NM NE SEMICIRCLE AND 90 NM SW SEMICIRCLE 
WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. REMAINDER OF AREA N OF 17N 
BETWEEN 44W AND 57W WINDS 20 KT OR LESS. SEAS 8 TO 11 FT IN 
MIXED SWELL.
.48 HOUR FORECAST TROPICAL STORM IDA NEAR 20.7N 46.7W. MAXIMUM 
SUSTAINED WINDS 55 KT GUSTS 65 KT. LITTLE CHANGE IN RADIUS OF 
TROPICAL STORM FORCE WINDS AND SEAS 12 FT OR GREATER WITH SEAS 
TO 29 FT. ELSEWHERE WITHIN 240 NM OF CENTER...EXCEPT 120 NM SW 
QUADRANT WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. REMAINDER OF AREA 
BOUNDED BY 31N59W TO 31N45W TO 20N41W TO 16N50W TO 31N59W WINDS 
20 KT OR LESS. SEAS 8 TO 11 FT IN MIXED SWELL.
.72 HOUR FORECAST TROPICAL STORM IDA NEAR 20.8N 46.1W. MAXIMUM 
SUSTAINED WINDS 55 KT GUSTS 65 KT.                         
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST TROPICAL STORM IDA NEAR 22.0N 46.8W. MAXIMUM 
SUSTAINED WINDS 60 KT GUSTS 75 KT.
.120 HOUR FORECAST HURRICANE IDA NEAR 24.0N 48.0W. 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. 

.ATLC 48 HOUR FORECAST N OF 30N BETWEEN 77W AND 80W WINDS 20 KT 
OR LESS. SEAS TO 8 FT PRIMARILY IN NE SWELL.

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

.FORECASTER LEWITSKY. NATIONAL HURRICANE CENTER.