Storm Dennis Yorkshire hour by hour extreme weather forecast for Sunday
But the worst of the bad weather should be over by lunchtime, according to the Met Office.
An Met Office amber weather warning is in place until 3pm on Sunday, meaning very heavy rain, flooding and disruption to travel is likely.
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Hide AdThe army has been drafted into to parts of Calderdale and Ilkley to help residents and businesses prepare for Storm Dennis.
Met Office Chief Meteorologist, Steve Willington, said: “Storm Dennis will bring another very unsettled spell of weather this weekend with a risk of flooding, particularly in parts of England and Wales and also southern Scotland, where snowmelt will add to the flood risk.
“Following Storm Ciara last weekend and further spells of rain this week, the ground is already saturated in places. With Storm Dennis bringing further heavy and persistent rain over the weekend, there is a risk of significant impacts from flooding, including damage to property and a danger to life from fast flowing floodwater.
“Our advice is to keep an eye on the latest weather forecast and weather warnings for your area and to follow the safety advice from officials.”
Hour-by-hour forecast
7am: 80 per cent chance of rain, 8 degrees
8am: 90 per cent chance of rain, 8 degrees
9am: 90 per cent chance of rain, 7 degrees
10am: 50 per cent chance of rain, 7 degrees
11am: 10 per cent chance of rain, 7 degrees
noon: 10 per cent chance of rain, 8 degrees
1pm: 10 per cent chance of rain, 8 degrees
2pm: less than five per cent chance of rain, 8 degrees
3pm: less than five per cent chance of rain, 9 degrees
4pm: less than five per cent chance of rain, 8 degrees
5pm: 10 per cent chance of rain, 7 degrees
6pm: 40 per cent chance of rain, 7 degrees
7pm: 60 per cent chance of rain, 6 degrees
8pm: 10 per cent chance of rain, 6 degrees
9pm: 10 per cent chance of rain, 6 degrees
10pm: 10 per cent chance of rain, 6 degrees
11pm: 10 per cent chance of rain, 6 degrees