A yellow weather warning has been set for Cumbria with weather officials warning 100mm of rain could potentially hit.
The Met Office has put in place the warning from 5pm today (December 18) until 5am on Saturday.
Torrential downpours are expected to cause disruption across the county.
The warning has been set for the west of Cumbria, covering Keswick, Sedbergh, Ulverston, Kendal, Bowness on Windermere, Penrith and Cockermouth.
Weather experts are predicting heavy, persistent rain over the region for 12 full hours.
A spokesperson for the Met Office said: “An area of heavy rain will move into north Wales and northwest England Friday morning and persist for the rest of the day before clearing eastwards in the small hours of Saturday morning.
“Widely 25-40 mm of rain is expected with 70 mm possible over the peaks of Snowdonia and 100 mm over the peaks of Cumbria.”
Flooding of a few homes and businesses is likely, says the Met Office.
Bus and train services will also probably affected with journey times taking longer.
There is potential for spray and flooding on roads probably, increasing journey times and there could be some interruption to power supplies and other services.
Here is the full forecast for the North West for the remainder of the week.
One or two bright spells at first, but a mostly cloudy and mild day with outbreaks of rain arriving from the west by late morning, turning heavy at times, and continuing into the afternoon.
Windy, with local coastal gales.
Maximum temperature 14 °C.
Downpours from the daytime continue into the night but eventually clear eastwards into the early hours.
Clear spells and some showers later.
Becoming less windy, but staying mild.
Minimum temperature 8 °C.
Saturday will see a mix of bright, or occasional sunny spells and showers, the showers sometimes heavy and possibly thundery.
Rather windy but still fairly mild.
Maximum temperature 11 °C.
Outlook for Sunday to Tuesday:
Sunny spells with scattered, blustery showers Sunday.
Turning cloudier with continuous rainfall Monday morning, though this clears into the afternoon, leaving brighter and drier weather that lasts through into Tuesday.