TXNT21 KNES 191839 TCSNTL A. 20L (TAMMY) B. 19/1800Z C. 13.8N D. 56.4W E. THREE/GOES-E F. T2.5/2.5 G. IR/EIR/VIS H. REMARKS...CENTER IS LESS THAN 1/2 DEG FM A LARGE COLD OVC RESULTING IN A DT OF 3.0. LLCC CLOSER TO EDGE OF DEEP CONVECTION THAN 6 HR AGO. SYSTEM HAS ELONGATED A BIT LAST SVRL HR. MET=1.5 AND PT=2.0. FT BASED ON CONSTRAINTS LIMITING FT TO 2.5 IN FIRST 24 HR OF CLASSIFICATION. I. ADDL POSITIONS NIL ...KONON