On the 8th August of 1808, a “remarkable storm” in Norwich caused cellars to flood and the streets to be inundates with roaring waters. The noise of the water rushing in and around the Cathedral was so loud, it was said to drown out the sound of the thunder (https://www.foxearth.org.uk/EastAnglianWeather.html). These events followed a severe thunderstorm in late July that did “much damage” in Long Stratton, Forncett, and Tacolnestone as hail, coming down in “rather large pieces of ice”. Suffering damage were greenhouse double glass, windows, and trees who were stripped of their branches, as well as some corn that was cut as if by scythe in “Buckenham”. (Norfolk Chronicle – Saturday July 23, 1808).
https://www.foxearth.org.uk/EastAnglianWeather.html is a great resource for historical weather events.