A destructive tornado outbreak devastated parts of the U.S. Upper Midwest on April 20, 2004. A total of 31 tornadoes formed in eastern Iowa, extending into northern and central Illinois and Indiana. A tornado that struck Utica, Illinois, was the only one to cause fatalities. An unusual feature of the outbreak is the fact that it was largely unexpected, as the SPC only predicted a "slight risk" of severe weather on the day of the event. Confirmed tornadoes Source: Granville–Utica, Illinois The only fatal tornado of the outbreak touched down in Putnam County, Illinois north of Florid before moving east and striking Granville. Witnesses reported a multiple-vortex tornado just prior to its arrival in Granville. The town was bisected by the half-mile-wide tornado with 12 buildings destroyed, 45 with major damage, and 26 with minor damage (mainly residential). The Granville State National Bank lost its roof, and Hopkins Elementary School lost the roof over the old gymnasium with damage in nearly all the classrooms. Significant damage also occurred to Granville Drugs, the only drug store in town. In a strange twist of irony, the town had finally recovered from a major fire 4 years earlier that decimated much of the business district. In Granville, 5 people were injured by the tornado, including an elderly woman who suffered a heart attack during the tornado and was eventually evacuated via Life Flight to a Peoria hospital. Injuries were low due to the 32 minutes of lead time before the tornado struck Granville. Damage in Granville was estimated to be at least $8 million, with the school suffering at least $3.5 million in damage. Damage in town was rated high-end F2. The tornado entered LaSalle County, Illinois from Putnam County, approximately northeast of the town of Standard, producing F0 intensity damage in a wooded area southwest of Peru. As the tornado continued northeast, and F2 intensity damage was done to several homes in a subdivision near the intersection of East 250th and 2569th Roads. Several roofs were blown off homes, along with damage to external walls. Significant tree damage was done as well. Path width was estimated at at this location. The tornado then continued northeast, crossing the Illinois River twice as it moved toward the town of Utica, downing a steel high tension tower on the north bank of the river, immediately west of Illinois Route 251. The tornado moved into the