Parts of the UK are set to get soaked over the next few days amid blustery downpours, with winds reaching 60mph.
The Met Office, which warned everyone to get their "coats and boots at the ready, [with] wet and windy weather to come this weekend", has issued a series of yellow warnings for rain through to Sunday.
They have been put in place as two separate Atlantic low-pressure systems will track to the north-west of the UK over the weekend, and the remnants of ex-Hurricane Zeta are likely to bring further heavy rain and strong winds on Sunday.
Met Office chief meteorologist Frank Saunders said: "This week has been fairly unsettled and we'll see this typical autumnal weather continuing over the weekend, with heavy rain and strong winds expected to bring disruption and risk of flooding to some areas."
The first weather warning lasts to just before midnight on Friday and says there could be damage to homes and businesses, travel cancellations and power cuts.
It predicts heavy rain and gales, with the mountains of north-west Wales and Cumbria set to be hit by the worst drenching as more than 100mm of rainfall is possible.
Elsewhere in the warning zone - which covers parts of north-west England, Wales, the West Midlands, Yorkshire and Humber - areas of higher ground could see strong to gale-force south-westerly winds, 50-80mm of rainfall, while 25-40mm could fall at lower levels.
Another warning which lasts through Saturday expects that bouts of heavy rain will hit southern, central and western Scotland through the weekend and bring a risk of flooding.
The warning for Saturday also covers parts of Wales, north-west England and Yorkshire and Humber.
Across some hills and mountains, particularly north-west Wales, they could see 80-100mm of rainfall while 40-60mm could fall elsewhere on high ground.
There could also be 20-30mm of rainfall in many places.
The final warning, which covers most of Sunday, says that "periods of heavy rain" are expected in Wales and north-west England and will bring the risk of further flooding.
Deputy chief meteorologist Martin Young said: "Saturday will be very wet and windy for many northern and western parts of the country as low-pressure sweeps north-eastwards past north-west Britain.
"Another system quickly follows on Sunday that contains the remnants of ex-Hurricane Zeta, bringing further heavy rain and strong winds."
This is falling on already saturated ground from what has been "a wet October" so there is an increased risk of flooding in some warning areas, he added.
Gary White, the duty tactical manager for Natural Resources Wales, said flooding is likely up and down the country over the next few days.
He said: "Our emergency response workers will be at key sites checking defences are in good working order and making sure any drainage grids and screens are clear to reduce the risk to people and their homes."
BBC weather charts show winds reaching close to 60mph in parts of the UK over the weekend.
UK 5 day weather forecast
Today:
Sunny spells across Northern Ireland and Scotland, and also a few showers over northern Scotland. Early cloud and outbreaks of rain over England and Wales becoming mostly confined to southern UK later. Some heavy rain south and west Wales.
Tonight:
Early evening cloud and rain over southern UK returning northwards, some heavy rain over higher ground in the north and west. Turning windy. Mild in the south, chilly further north.
Saturday:
Early cloud and rain, heavy at times, moving eastwards. Brighter weather with showers follows from the west during the afternoon, showers mainly in the northwest. Generally windy.
Outlook for Sunday to Tuesday:
Rain spreading across the north on Sunday morning with blustery showers later. Outbreaks of persistent rain, heavy at times across the south, clearing Monday morning. Sunshine and showers thereafter. Windy.
