Weather predictions for possible tornadoes from a new storm system today threaten the Midwest and South, and have recent victims nervous about what the day might hold. The first powerful storm system tore through parts of the Midwest and South earlier this week, killing 13 people from Kansas to Kentucky, leaving pockets of devastation across several states and marking the acceleration of another deadly (and early) tornado season. Tornadoes and powerful winds tore off roofs, leveled homes and businesses, tossed mobile homes, downed power lines and injured more than 150 people. The damage was most significant in Harrisburg, a small town in southern Illinois where blocks of houses and businesses were reduced to rubble. -- Paula Nelson( 25 photos total