Timeline Worksheet: October 17, 1091, London Tornado! Today, we remember October 17, 1091, the date when a massive tornado struck the heart of London. I’ve created a research prompt worksheet to help you learn more about tornadoes. Timeline Worksheet: October 17, 1091 Blank printable timeline index card Printable timeline index card (Fits English history timeline or natural disaster timeline.) If you are new to this series, visit my introduction to timeline index cards. Return to the Timeline-AD.