On the morning of May 28, 2016, the Storm Prediction Center had issued a High Risk for much of the Midwest, including 45% tornado probabilities across portions of Illinois and Indiana, and 30% tornado probabilities extending into portions of Iowa, Wisconsin, and Missouri. A rapidly deepening low pressure system with a pressure of 894 millibars was located over portions of Central Iowa as of 15z. A 100 knot jet streak at the 500-millibar pressure level was located across portions of Oklahoma, and rapidly rounding the base of the trough, pushing its way northeast. An unusually well-defined dryline for so far east was draped southward from the low, as well as a sharp cold front approximately 100 miles behind it. A well-defined warm front was also draped from the low pressure center and into p