Hurricane HELENE

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HURRICANE HELENE FORECAST/ADVISORY NUMBER  20
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL   AL082006
0900 UTC SUN SEP 17 2006
 
HURRICANE CENTER LOCATED NEAR 20.0N  48.2W AT 17/0900Z
POSITION ACCURATE WITHIN  20 NM
 
PRESENT MOVEMENT TOWARD THE NORTHWEST OR 305 DEGREES AT   8 KT
 
ESTIMATED MINIMUM CENTRAL PRESSURE  979 MB
MAX SUSTAINED WINDS  75 KT WITH GUSTS TO  90 KT.
64 KT....... 20NE  20SE  15SW  20NW.
50 KT....... 40NE  40SE  30SW  40NW.
34 KT.......150NE 125SE  90SW 125NW.
12 FT SEAS..200NE 180SE 180SW 225NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT.  RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.
 
REPEAT...CENTER LOCATED NEAR 20.0N  48.2W AT 17/0900Z
AT 17/0600Z CENTER WAS LOCATED NEAR 19.8N  47.9W
 
FORECAST VALID 17/1800Z 20.7N  49.3W
MAX WIND  80 KT...GUSTS 100 KT.
64 KT... 20NE  20SE  15SW  20NW.
50 KT... 40NE  40SE  30SW  40NW.
34 KT...150NE 125SE  90SW 125NW.
 
FORECAST VALID 18/0600Z 21.7N  50.5W
MAX WIND  85 KT...GUSTS 105 KT.
64 KT... 25NE  25SE  15SW  25NW.
50 KT... 50NE  50SE  35SW  50NW.
34 KT...150NE 150SE 100SW 125NW.
 
FORECAST VALID 18/1800Z 22.6N  51.7W
MAX WIND  90 KT...GUSTS 110 KT.
64 KT... 25NE  25SE  15SW  25NW.
50 KT... 50NE  50SE  35SW  50NW.
34 KT...150NE 150SE 100SW 125NW.
 
FORECAST VALID 19/0600Z 23.3N  53.2W
MAX WIND  95 KT...GUSTS 115 KT.
50 KT... 60NE  60SE  40SW  60NW.
34 KT...175NE 175SE 100SW 150NW.
 
FORECAST VALID 20/0600Z 24.0N  56.0W
MAX WIND  95 KT...GUSTS 115 KT.
50 KT... 60NE  60SE  40SW  60NW.
34 KT...175NE 175SE 100SW 150NW.
 
EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 225 NM
ON DAY 4 AND 300 NM ON DAY 5...AND FOR INTENSITY NEAR 20 KT EACH DAY
 
OUTLOOK VALID 21/0600Z 26.0N  58.0W
MAX WIND  85 KT...GUSTS 105 KT.
 
OUTLOOK VALID 22/0600Z 29.0N  59.0W
MAX WIND  80 KT...GUSTS 100 KT.
 
REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 20.0N  48.2W
 
NEXT ADVISORY AT 17/1500Z
 
$$
FORECASTER BROWN/KNABB
 
 
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