The London Tornado of 1091 is the earliest reported tornado in England, occurring in London on Friday, 17 October 1091. It has been estimated by modern assessment as possibly a T8 on the TORRO scale (roughly equivalent to an F4 on the Fujita scale), making it one of the strongest recorded tornadoes in the British Isles, alongside the 1666 Lincolnshire tornado, although this estimate is based on reports written 30 years later.
The London Tornado of 1091 is the earliest reported tornado in England, occurring in London on Friday, 17 October 1091. It has been estimated by modern assessment as possibly a T8 on the TORRO scale (roughly equivalent to an F4 on the Fujita scale), making it one of the strongest recorded tornadoes in the British Isles, alongside the 1666 Lincolnshire tornado, although this estimate is based on reports written 30 years later.
Source: Wikipedia "London tornado of 1091" · CC BY-SA 4.0
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