This aerial view on Monday, Nov. 18, 2013, shows the path of a tornado that hit the western Illinois town of Washington on Sunday. It was one of the worst-hit areas after intense storms and tornadoes swept through Illinois. The National Weather Service says the tornado that hit Washington had a preliminary rating of EF-4, meaning wind speeds of 170 mph to 190 mph. (AP Photo/Charles Rex Arbogast)WASHINGTON, Ill. (AP) — When a cluster of violent thunderstorms started marching throughout the Midwest, forecasters had been in a position to draw a vivid line on a map showing the place the worst of the weather would go.