Using the conventional radar, it is difficult to see the hook-shape of the radar echo, while the TDWR clearly depicts the hook echo, as well as the Rear-Flank Downdraft (RFD) curling into the hook.

"The radar scan at 5:52am clearly shows a "hook echo" offshore — that's the signature we look for to identify a developing tornado. This feature was embedded within a broad area of very heavy ...