In all, the "One-two Punch" derechos of June 30, 2014 produced more than 300 non-duplicate reports of severe weather from eastern Nebraska to southern Michigan and northwest Ohio, including nearly two-dozen short-lived tornadoes (path lengths less than ten miles and durations less than ten minutes). The first derecho tracked from central Iowa to Lake Michigan (a distance of 320 miles) in five hours, with an average forward speed of 64 mph. The second moved from far eastern Iowa to northwest Ohio and southeast Michigan (a distance of 350 miles) in about six hours, yielding an average speed of 58 mph. While the tracks of the two wind-producing convective systems slightly differed, their paths considerably overlapped; parts of Iowa and Illinois experienced derecho winds twice within a several-hour period. Although derechos of similar size and strength typically affect the Midwest once or twice a year, it is unusual for two derechos to occur in rapid succession --- and for the events to affect overlapping areas. Rapid low-level moisture return in the wake of the first derecho, and the timely arrival of both stronger flow aloft and increased forcing for ascent with the second upper-level disturbance, appear to have been responsible for the atmosphere's ability to support two severe squall lines over the same region on a single afternoon and evening.