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Tropical Depression FIFTEEN


ZCZC MIATCDAT5 ALL
TTAA00 KNHC DDHHMM
TROPICAL DEPRESSION FIFTEEN DISCUSSION NUMBER   2
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL   AL152007
1100 PM EDT THU OCT 11 2007
 
THE OVERALL CLOUD PATTERN OF THE DEPRESSION HAS CHANGED VERY LITTLE 
THIS EVENING. DVORAK INTENSITY ESTIMATES FROM SAB AND TAFB ARE 25
AND 30 KT RESPECTIVELY AND THE INITIAL INTENSITY WILL REMAIN 30 KT.
THE DEPRESSION IS ONCE AGAIN IN THE QUIKSCAT GAP...BUT AMSU AND SSMI
MICROWAVE OVERPASSES HAVE BEEN HELPFUL IN FINDING THE CENTER OF THE
CYCLONE...WHICH IS LOCATED JUST SOUTHWEST OF THE DEEP CONVECTION. 
BASED ON THE MICROWAVE AND SATELLITE FIXES...THE DEPRESSION HAS
BEEN DECELERATING DURING THE PAST FEW HOURS AND THE INITIAL MOTION
ESTIMATE IS 090/8 KT.    
 
AN UPPER LEVEL TROUGH SEEN IN WATER VAPOR IMAGERY IS APPROACHING THE
CYCLONE FROM THE WEST.  AS THIS TROUGH MOVES BY THE DEPRESSION
TONIGHT....THE STRONG SOUTHWESTERLY UPPER-LEVEL WINDS THAT HAVE
BEEN PLAGUING THE SYSTEM WILL BE REPLACED BY STRONGER NORTHERLIES. 
THEREFORE...LITTLE OR NO STRENGTHENING IS EXPECTED AND THE 
DEPRESSION IS FORECAST TO BECOME A REMNANT LOW IN ABOUT 36 HOURS...
IF NOT SOONER.

THE TRACK FORECAST REASONING REMAINS UNCHANGED FROM THE PREVIOUS
ADVISORY.  AS THE DEPRESSION BECOMES A MORE SHALLOW SYSTEM...IT IS
EXPECTED TO CONTINUE TO DECELERATE AND MEANDER UNTIL A COLD FRONT
APPROACHES THE CENTRAL ATLANTIC IN ABOUT 48 HOURS. THE NEW OFFICIAL
FORECAST IS A LITTLE SLOWER AND WEST OF THE PREVIOUS TRACK....CLOSE
TO THE 18Z UKMET SOLUTION.
  
FORECAST POSITIONS AND MAX WINDS
 
INITIAL      12/0300Z 30.0N  49.7W    30 KT
 12HR VT     12/1200Z 30.0N  48.9W    30 KT
 24HR VT     13/0000Z 30.1N  48.4W    25 KT
 36HR VT     13/1200Z 30.4N  48.2W    25 KT...REMNANT LOW
 48HR VT     14/0000Z 31.0N  48.2W    25 KT...REMNANT LOW
 72HR VT     15/0000Z...DISSIPATED
 
$$
FORECASTER BROWN
 
NNNN


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Page last modified: Friday, 02-Nov-2007 21:20:52 UTC