Heavy rain across most of Scotland could bring “significant disruption” in the build-up to Hogmanay, forecasters have warned.

The Met Office has issued a yellow weather warning for heavy rain everywhere north of the border apart from Orkney and Shetland on December 30 and 31.

It says 50-70mm of rain is possible over the two days in many areas, while some places may see 100-140mm – with these higher totals most likely over western Scotland.

Some areas may also see snow, especially in northern Scotland and over high ground, while strong winds could bring further disruption, particularly on New Year’s Eve.

The Met Office said: “Rain is likely to become persistent and occasionally heavy on Monday and possibly last through New Year’s Eve.

“This may bring some significant disruption and flooding in the build up to new year events, although there is still a lot of uncertainty in which areas are likely to be affected.”

Forecasters warned flooding could lead to difficult driving conditions and travel disruption, while there is a small chance of fast-flowing or deep floodwater causing danger to life.

They also said there is a slight chance of power cuts and a small possibility that homes and businesses could be flooded.

The weather warning will be in force for the whole of Monday and Tuesday.

Crowds are expected to gather in Edinburgh for New Year’s Eve celebrations on December 31 and event organisers advised people to dress for all weathers and check social media for updates.

A spokesperson for Edinburgh’s Hogmanay said: “We continue to work closely with Met Office and other agencies to monitor forecasts in the days leading up to Hogmanay.

“As always in Scotland, the forecasts are changing regularly and we are still a few days away, so we advise customers to stay up-to-date via our social channels and Met Office.

“For all Edinburgh’s Hogmanay outdoor events, we recommend audiences dress appropriately for winter events in Scotland – prepare for all weather, wrap up warm and double-check with your travel operator for the latest updates.”

Forecasters predict the UK will have dull and drizzly weather over the next few days ahead of the new year.

Mild temperatures and conditions similar to those on Boxing Day are forecast, with cloud and “patchy drizzle” in areas with thick cloud, including western Wales and south-west England, the Met Office said.

Met Office meteorologist Simon Partridge said: “Basically, the North East seems to be the place to be for the next couple of days if you want to see some brighter and maybe even some blue sky at times, whereas elsewhere is mainly grey.”

Over the weekend it will become “a little bit windier and a little bit wetter” across Scotland, with showers in northern Scotland as a result of low pressure, he said.

Further south it will be “pretty cloudy” with some breaks in the cloud on Sunday because of slightly stronger winds.

Temperatures at the weekend may be “slightly fresher” with highs of about 9C to 11C expected, compared with 11C to 13C earlier in the week, though it will still be fairly mild for the time of year including overnight, with little frost expected.

But Mr Partridge added: “As we head towards new year, particularly for New Year’s Eve, it looks like there could be some wet and rather windy weather, particularly across Scotland, which is not ideal considering that’s the place that really goes to town for New Year’s Eve.”