ZCZC MIATCDEP1 ALL TTAA00 KNHC DDHHMM TROPICAL DEPRESSION SIXTEEN-E SPECIAL DISCUSSION NUMBER 1 NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 1030 AM PDT MON OCT 20 2003 THE AREA OF DISTURBED WEATHER SOUTH OF ACAPULCO HAS CONTINUED TO ORGANIZE THIS MORNING AND HAS BECOME A TROPICAL DEPRESSION. DVORAK CLASSIFICATIONS AT 12Z WERE T1.5 AND T1.0 FROM TAFB AND SAB... RESPECTIVELY...BUT VISIBLE IMAGERY INDICATES SEVERAL THIN BUT DECIDEDLY-CURVED CONVECTIVE BANDS. THE ONLY THING THAT IS NOT ENTIRELY CLEAR IS THE LOCATION OF THE SURFACE CENTER RELATIVE TO THE CURVATURE IN THE CONVECTIVE TOPS. THE INITIAL MOTION IS ESTIMATED TO BE 280/8. THE DEPRESSION IS EMBEDDED IN A DEEP-LAYER EASTERLY CURRENT THAT SHOULD TAKE THE CYCLONE GENERALLY WEST OR WEST-NORTHWESTWARD FOR THE NEXT DAY OR SO. WATER VAPOR IMAGERY SHOWS A MID- TO UPPER-LEVEL LOW OVER THE SOUTHERN BAJA PENINSULA. THE FLOW AROUND THE SOUTH SIDE OF THIS LOW SHOULD BEGIN TO DEFLECT THE TRACK OF THE TROPICAL CYCLONE TO THE NORTHWEST IN A COUPLE OF DAYS. BEYOND THAT...GLOBAL MODELS INDICATE THAT THERE WILL BE SUBSTANTIAL WESTERLY SHEAR...WHICH COULD TAKE THE CYCLONE NORTHWARD IF IT IS STRONG ENOUGH TO RESPOND TO THE UPPER FLOW. THE OFFICIAL FORECAST TAKES A MIDDLE TRACK NEAR THE MEDIUM BAM. THIS TRACK IS ALSO LIES BETWEEN THE GFS AND UKMET SOLUTIONS. FORECASTER FRANKLIN FORECAST POSITIONS AND MAX WINDS INITIAL 20/1630Z 10.0N 100.7W 30 KT 12HR VT 21/0000Z 10.2N 102.0W 35 KT 24HR VT 21/1200Z 10.9N 104.0W 40 KT 36HR VT 22/0000Z 11.6N 105.6W 45 KT 48HR VT 22/1200Z 12.5N 107.0W 50 KT 72HR VT 23/1200Z 14.0N 108.5W 50 KT 96HR VT 24/1200Z 15.5N 109.5W 45 KT 120HR VT 25/1200Z 17.0N 110.5W 45 KT NNNN
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Page last modified: Monday, 07-Feb-2005 16:50:00 UTC