As authorities investigate whether the deadly collapse of a stage at the Indiana State Fair this past weekend was preventable, an official timeline brings the question into sharper focus.

Indiana Gov. Mitch Daniels said it did not appear that such a tragedy could have been predicted. “I’m not clear how anyone could have foreseen a sudden, highly localized blast of wind,” he said.

But Mike Smith, senior vice president of AcuWeather Enterprise solutions, told Rolling Stone he thinks the tragedy could have been prevented, if not the stage’s collapse. “Everyone keeps saying that this was a fluke — that it couldn’t have been foreseen,” he said. “It was quite forseeable. The State Fair should have had someone making a call that if a weather warning was issued, the area would have been evacuated immediately.”