How does cathy's hat fall on the road?

Cathy lost her bonnet in the storm.

"There was a violent wind, as well as thunder..."

"But the uproar passed away in twenty minutes, leaving us all unharmed; excepting Cathy, who got thoroughly drenched for her obstinacy in refusing to take shelter, and standing bonnetless and shawl-less to catch as much water as she could with her hair and clothes."