WWPN20 KNES 282119 A. TROPICAL DISTURBANCE (90W) B. 28/2030Z C. 18.7N D. 152.4E E. FIVE/MTSAT F. T1.0/1.0/S0.0/24HRS G. IR/EIR/VIS H. REMARKS...SOME IMPROVEMENT IN CONVECTION BUT CENTER IS STILL ILL-DEFINED. SYSTEM IS AT THE BASE OF A MID-LEVEL TROUGH WITH POOR UPPER LEVEL DYNAMICS.