Analysis of information sources in references of the Wikipedia article "Stephens City, Virginia" in English language version.
Sept. 17, 2004: "Ivan" spawned 29 F0/F1 tornadoes, 10 strong F2 tornadoes and one strong F3 tornado
Sept. 17, 2004: "Ivan" spawned 29 F0/F1 tornadoes, 10 strong F2 tornadoes and one strong F3 tornado