If you think you have seen every possible type of weather, you have not and never will. Most weather systems seem to come in gradually and move from west to east across the country. Last Monday a front line of thunderstorms formed in eastern Iowa. It was very narrow, about one county wide, but was more than 200 miles long stretching across the entire state. It moved toward the southeast across the eastern half of the country and brought severe weather to many locations. This is a photo of it shortly before sunset.