Parts of Cumbria and Lancashire have been hit with more than a month's worth of rain in just 24 hours - and forecasters warn there is more on the way.
The village of Shap in Cumbria had the most, with 178.2mm of rain falling in the 24 hours until 7pm on Saturday night, while Keswick was hit with 156.4mm over the same period.
The average rainfall for Cumbria for the month of December is 146.1mm, he said.
The Royal National Lifeboat Institution deployed its rescue team to help with the response in Cumbria.
Northern England has been hit by gusts of up to 80mph - powerful enough to overturn lorries and tear branches from trees and tiles from roofs. And London was hit with 50mph winds.
It is the fourth named storm to hit Britain in the past few months.
There is still the potential for more rain to come overnight, potentially another 100mm in the Lake District over the next 12 hours.
To have this amount of rainfall in that short space of time is very unusual." He said the weather in the north west should improve tomorrow, but fresh downpours are forecast for Monday and another weather warning has been put in place.
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