1) Doppler weather radar concepts are discussed, including how the radar beam increases in size and altitude with distance from the radar. A full radar scan can take 4-5 minutes. 2) Examples from 2009 storm outbreaks are provided, including shear profiles, radar images of supercell storms, and rotation couplet signatures. 3) Key questions about tornadogenesis are identified, such as why some supercells produce tornadoes while others do not, even if they have similar structures.