Storm Christoph is set to bring heavy rain to Wirral this week.
Three days of weather warnings have been issued and are in place from Tuesday until Thursday.
Up to 200mm of rain could fall in some areas and winds could peak at over 40 mph.
Homes could be flooded, communities could be cut off by floodwater and there’s a risk of power cuts warns the Met Office.
Several days of persistent, and occasionally heavy, rain are expected to affect the region as Storm Christoph affects the UK.
The heaviest and most persistent rain is likely to be across Wales and the high ground of northern England.
By early Thursday, 30-60 mm of rain is expected to have fallen widely across the warning area, with 100-150 mm over the high ground of Wales and northern England.
“Up to 200 mm is possible across parts of north Wales and northwest England. Melting snow across higher parts of the Pennines may exacerbate the potential for flooding.
Strong winds will also accompany the rainfall and may add to travelling difficulties across areas higher and more exposed routes.
Chief Meteorologist Dan Suri, said “Following a cold spell where the main hazard was snow, our focus now turns to notably heavy rain moving across the UK this week.
“Some locations could see over 100mm of rain falling through the course just a couple of days with up to 200mm possible over higher ground.
“These amounts of rainfall along with snow melt present a real threat of flooding and people should keep a close eye on flood warnings from the Environment Agency and Natural Resources Wales.
“As the system moves away into the North Sea Wednesday night and Thursday morning there will be strong winds along the east coast for a time. Meanwhile, colder air coming southwards into the weather system brings the risk of further snow on the back edge of this system.
“Temperatures will gradually fall across the UK through the end of the week and into the weekend bringing a return to widespread overnight frosts.”