TXNT29 KNES 251817 TCSNTL A. 17L (NONAME) B. 25/1756Z C. 25.7N D. 93.7W E. THREE/GOES-E F. SUBTROPICAL G. IR/EIR/VIS H. REMARKS...STRONG COLD AIR INTRUSION WAS OBSERVED PROGRESSING INTO THE REGION OF THE LLC. COLD FRONTAL STRUCTURE WAS OBSERVED AS WELL SOUTH OF THE LLC. THIS WILL BE THE FINAL BULLETIN UNLESS SATELLITE ANALYSIS SUGGESTS THE SYSTEM HAS BECOME PURELY TROPICAL IN NATURE. I. ADDL POSITIONS NIL ...SAMBUCCI