Dual-pol radar captures image of debris Posted in Featured, Photo of the Month on May 23, 2013 by Susan Cobb. Permalink Dual-polarized radar from May 19, 2013 identified debris in the air (inside white circle) confirming a tornado was on the ground. Related posts: NSSL’s Rotation Tracks image of the tornado outbreak gets some appreciation! Iced out Up up and away! A bird’s eye view!