As was the case early last season, the significant amont of deaths from tornadoes have occurred due to violent tornadoes ocurring in the overnight and early morning hours. This article discusses and outlines the statistics relating how tornado deaths have not dropped as much compared to day time deaths due to the improvement in warning systems and forecasting techniques.
http://www.sciencedaily.com/releases/2008/11/081105092535.htmRegards,
Jimmy Deguara