This study reports on the accuracy and effectiveness of radar-based hail detection. Hail detection outputs from the National Weather Service (NWS) network of more than 150 Doppler radars form the backbone of many commercially available post-storm hail swath products. Comparisons with the ground-truth observations recorded during the IBHS hail field program are ideal for evaluating the capabilities of these sources to detect hail, show the width of the hail swath, and estimate the maximum size of hail that reaches the ground.