Not many of you will know this story, but read on to find out about this extraordinary event that happened in 1091. Extraordinary not so much for having a tornado in London, but for its power.
On the morning of October 17, 1091, it seemed normal and no one was expecting a tornado. Not any tornado, but the strongest one recorded in London. In fact, it was probably a F4 or even F5 on the Fujita scale. Incredibly destructive with winds reaching 370 km per hour!
London was then almost entirely made of wood. There was just the White Tower of the Tower of London which was about ten years old and a few masonry churches. A tornado of this type blew almost everything away. Including London Bridge at the time that was partly destroyed by the tornado but also by the Thames current, which carried it away. It was still new having been built by William the Conqueror after 1066.
The famous church of St Mary-le-Bow was badly damaged, with the roof being thrown a certain distance violently. With so much force that the nine-meter-long beams were driven into the ground and only about a meter remained outside.
The river flooded the surrounding areas and not many buildings remained standing. London Bridge was rebuilt soon after, the main bridge connecting London with the southern parts of the country. The new bridge also had a short life, in 1140 it was destroyed by a fire.