WWPS20 KNES 200931 A. TROPICAL DISTURBANCE (91P) B. 20/0730Z C. 28.5S D. 159.9E E. ONE/MTSAT F. EXTRATROPICAL G. IR/EIR H. REMARKS...REPOSITIONED CENTER BASED ON 0316Z AMSU AND RECATEGORIZED SYSTEM AS EXTRATROPICAL BASED ON WV IMAGERY AND INVOLVEMENT WITH FRONTAL FEATURES. EARLIER MASS OF CONVECTION APPEARS TO BE MID-LEVEL REMAINS OF VORTICITY PRESENTLY BEING ABSORBED BY MAIN CIRCULATION.