000
FZNT02 KNHC 202127
HSFAT2

HIGH SEAS FORECAST 
NWS NATIONAL HURRICANE CENTER MIAMI FL                     
2230 UTC SUN SEP 20 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SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS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 1800 UTC SUN SEP 20.
24 HOUR FORECAST VALID 1800 UTC MON SEP 21.
48 HOUR FORECAST VALID 1800 UTC TUE SEP 22.

.WARNINGS.

...TROPICAL STORM WARNING...
.TROPICAL STORM IDA NEAR 18.4N 46.3W 1005 MB AT 2100 UTC SEP 20 
MOVING NW OR 305 DEG AT 15 KT. MAXIMUM SUSTAINED WINDS 40 KT 
GUSTS 50 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 180 NM NE...90 NM SE...45 NM SW AND 150 NM NW 
QUADRANTS WITH SEAS TO 16 FT. ELSEWHERE WITHIN 240 NM NE AND 90 
NM SW SEMICIRCLES WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. REMAINDER 
AREA FROM 16N TO 23N BETWEEN 40W AND 48W WINDS 20 KT OR LESS. 
SEAS 8 TO 11 FT IN MIXED SWELL.
.24 HOUR FORECAST TROPICAL STORM IDA NEAR 20.9N 48.5W. MAXIMUM 
SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE WINDS 
WITHIN 140 NM E SEMICIRCLE...0 NM SW QUADRANT AND 40 NM NW 
QUADRANT. SEAS 12 FT OR GREATER SEAS WITHIN 180 NM NE AND 75 NM 
SW SEMICIRCLES WITH SEAS TO 18 FT. ELSEWHERE WITHIN 240 NM NE 
AND 90 NM SW SEMICIRCLES WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. 
REMAINDER AREA FROM 19N TO 26N BETWEEN 45W AND 53W WINDS 20 KT 
OR LESS. SEAS 8 TO 11 FT IN MIXED SWELL.
.48 HOUR FORECAST TROPICAL STORM IDA NEAR 21.5N 48.5W. MAXIMUM 
SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE WINDS 
WITHIN 120 NM E SEMICIRCLE...0 NM SW QUADRANT AND 60 NM NW 
QUADRANT. SEAS 12 FT OR GREATER WITHIN 150 NM NE AND 60 NM SW 
SEMICIRCLES WITH SEAS TO 17 FT. ELSEWHERE WITHIN 180 NM NE AND 
75 NM SW SEMICIRCLES WINDS 20 TO 33 KT. SEAS 8 TO 11 FT. 
REMAINDER AREA FROM 19N TO 26N BETWEEN 46W AND 52W WINDS 20 KT 
OR LESS. SEAS 8 TO 10 FT IN MIXED SWELL.
.72 HOUR FORECAST TROPICAL STORM IDA NEAR 21.0N 48.2W. MAXIMUM 
SUSTAINED WINDS 45 KT GUSTS 55 KT. 
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST TROPICAL STORM IDA NEAR 20.9N 48.5W. MAXIMUM 
SUSTAINED WINDS 45 KT GUSTS 55 KT.
.120 HOUR FORECAST TROPICAL STORM IDA NEAR 22.5N 49.5W. MAXIMUM 
SUSTAINED WINDS 45 KT GUSTS 55 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 N OF 23N BETWEEN 43W AND 53W SE WINDS 20 TO 30 KT. SEAS 8 
TO 11 FT. 
.24 HOUR FORECAST N OF 26N BETWEEN 48W AND 53W SE WINDS 20 TO 25 
KT. SEAS 8 TO 11 FT. 
.48 HOUR FORECAST N OF 26N BETWEEN 49W AND 54W WINDS 20 KT OR 
LESS. SEAS TO 9 FT IN SE SWELL. 

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

.FORECASTER MUNDELL. NATIONAL HURRICANE CENTER.