000
FZNT02 KNHC 201521 CCA
HSFAT2

HIGH SEAS FORECAST
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1630 UTC WED SEP 20 2006
SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS

PAN PAN 

ATLANTIC FROM 7N TO 31N W OF 35W INCLUDING CARIBBEAN SEA AND 
GULF OF MEXICO

SYNOPSIS VALID 1200 UTC WED SEP 20
24 HOUR FORECAST VALID 1200 UTC THU SEP 21
48 HOUR FORECAST VALID 1200 UTC FRI SEP 22

.WARNINGS...
...HURRICANE WARNING...
.HURRICANE HELENE NEAR 26.0N 56.3W 958 MB AT 1500 UTC SEP 20 
MOVING NW OR 315 DEG AT 10 KT. MAXIMUM SUSTAINED WINDS 90 KT 
GUSTS 110 KT. TROPICAL STORM FORCE WINDS WITHIN 175 NM NW AND SE 
QUADRANTS..200 NM NE AND 150 NM SW QUADRANTS. SEAS 12 FT OR 
GREATER WITHIN 375 NM NE...300 NM SE...225 NM SW...AND 350 NM NW 
QUADRANTS WITH SEAS TO 35 FT.
.24 HOUR FORECAST HURRICANE HELENE NEAR 29.4N 57.3W. MAXIMUM
SUSTAINED WINDS 95 KT GUSTS 115 KT. TROPICAL STORM FORCE WINDS 
WITHIN 175 NM W SEMICIRCLE...225 NM NE AND 200 NM SE QUADRANTS. 
SEAS 12 FT OR GREATER WITHIN 400 NM N SEMICIRCLE...300 NM SE AND 
240 NM SW QUADRANTS WITH SEAS TO 35 FT.
.48 HOUR FORECAST HURRICANE HELENE NEAR 35.0N 54.5W. MAXIMUM
SUSTAINED WINDS 85 KT GUSTS 105 KT. TROPICAL STORM FORCE WINDS
WITHIN 200 NM E SEMICIRCLE AND 175 NM W SEMICIRCLE. SEAS 12 FT 
OR GREATER WITHIN 360 NM N SEMICIRCLE AND 250 NM S SEMICIRCLE 
WITH SEAS TO 30 FT.
.72 HOUR FORECAST EXTRATROPICAL LOW HELENE NEAR 40.5N 47.0W.
MAXIMUM SUSTAINED WINDS 85 KT GUSTS 105 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST EXTRATROPICAL LOW HELENE NEAR 46.0N 36.5W.
MAXIMUM SUSTAINED WINDS 65 KT GUSTS 80 KT.
.120 HOUR FORECAST EXTRATROPICAL LOW HELENE NEAR 50.0N 28.0W.
MAXIMUM SUSTAINED WINDS 55 KT GUSTS 65 KT.

.SYNOPSIS AND FORECAST.
.ATLC...EXCEPT AS NOTED IN WARNINGS. WITHIN 390 NM N SEMICIRCLE 
AND 300 NM S SEMICIRCLE WINDS 20 TO 33 KT SEAS 8 TO 12 FT.
.24 HOUR FORECAST...EXCEPT AS NOTED IN WARNINGS. WITHIN 420 NM E 
SEMICIRCLE AND 300 NM W SEMICIRCLE WINDS 20 TO 33 KT SEAS 8 TO 
12 FT.
.48 HOUR FORECAST...EXCEPT AS NOTED IN WARNINGS. OVER FORECAST 
WATERS WITHIN 480 NM SE QUADRANT AND 420 NM SW QUADRANT WINDS 20 
TO 33 KT SEAS 8 TO 12 FT.

.ATLC COLD FRONT 31N77W 29N81W. N OF 27N WITHIN 360 NM E OF FRONT
SW WIND TO 20 KT SEAS LESS THAN 8 FT.  
.24 HOUR FORECAST COLD FRONT 31N69W 25N80W. WINDS LESS THAN 20 
KT. SEAS...SEE HELENE WARNING.

.ATLC 24 HOUR FORECAST TROPICAL WAVE ALONG 34W. FROM 14N TO 20N 
E OF 38W NE TO E WIND TO 20 KT SEAS TO 8 FT.  
.48 HOUR FORECAST TROPICAL WAVE ALONG 40W. FROM 15N TO 21N E OF 
44W NE TO E WINDS 20 TO 25 KT SEAS TO 9 FT.

.CARIBBEAN 24 HOUR FORECAST S OF 14N FROM 70W TO 75W E WIND TO 
20 KT SEAS LESS THAN 8 FT.
.48 HOUR FORECAST LITTLE CHANGE.

.GULF OF MEXICO 36 HOUR FORECAST N OF 25N W OF 93W S WINDS TO 20 
KT SEAS LESS THAN 8 FT.
.48 HOUR FORECAST W OF 90W SE TO S WINDS 20 KT SEAS LESS THAN 8 
FT.

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

$$
FORECASTER MUNDELL
TROPICAL ANALYSIS AND FORECAST BRANCH
TROPICAL PREDICTION CENTER