History of Wigan   (Help with ancient and recent history.)

I wonder if anyone can shed light on this.
In David Sinclair's History of Wigan Vol. 1 (1882) he describes a great storm that hit Wigan in 923AD. He also reports that it destroyed crops which resulted in near famine. I have carried out extensive research and can't find any mention of this event anywhere. Sinclair didn't reference anything in his book so I am sceptical about this. In addition his narrative appears quite speculative in many instances, particularly in the period stretching from Romans to the Norman Conquest. However, the mere fact that he is precise about the year suggests that he may have gleaned the information from some historic document.
Any help would be greatly appreciated.