Met Office maps show where temperatures will plunge this weekend

People are being warned to expect disruption with weather warnings of snow and ice in place for much of Scotland from Friday into Saturday.

The Met Office has warned some roads and railways are likely to be affected while there is a chance of power cuts and disruption to mobile phone services.

In Scotland, a yellow weather warning for snow and ice stretching from the Orkney Isles down to Stirling comes into effect at 3pm on Friday and remains in force until 6pm on Saturday.

Meanwhile, weather warnings of snow and rain south of the border have expired, with milder conditions expected - particularly in southern England - on Saturday. However, flood warnings and alerts remain in place throughout much of the country.

• Read more: Scotland faces snow warning as hundreds of flood alerts remain in place for England (Sky News)

The following maps, from the Met Office, show where it will be coldest over the weekend.

Saturday, 9am

Saturday, 4pm

Sunday, 3am

Sunday, 12pm

Sunday, 6pm

Weather near you

Here, using Met Office forecasts, Yahoo also breaks down what the weather will be like for each region of the UK over the weekend and into Monday.

London and the South-East

• Saturday to Monday

On Saturday, early patchy fog or low clouds will clear, followed by bright or sunny spells: best across western areas. Most places will remain dry, but isolated showers will arrive across western areas. Maximum temperature 12C. Sunday will be generally cloudy with scattered showers, while Monday will be brighter and drier once early fog or low cloud has cleared.

South-West

• Saturday to Monday

Saturday will mostly be cloudy, with further showers to start the weekend. However, some brighter spells are possible. Generally it will be mild for the time of year, with a maximum temperature of 11C. Going into Sunday and Monday, there will be a mixture of some brighter and drier intervals at times, though still a risk of showers or longer spells of rain. Generally there will be lighter winds, with temperatures close to average.

Midlands

• Saturday to Monday

In the East Midlands, early patchy fog or low cloud will gradually clear on Saturday. It will be followed by bright or sunny spells, mainly dry with light winds and temperatures close to average. Maximum temperature 11C. Sunday will be generally cloudy with showers, while Monday will be brighter with isolated showers.

In the West Midlands, there will be brighter spells on Saturday, though with showers at times too. Winds will be light and temperatures average: maximum 11C. On Sunday and Monday, there will be a mixture of some brighter and drier intervals, though still with a risk of showers or longer spells of rain at times.

North-East

• Saturday to Monday

Saturday will see cloudy conditions with outbreaks of rain, initially across Northumberland, though these will gradually clear northwards. Following that, bright or sunny spells can be expected for all areas, with a maximum temperature of 9C. Longer spells of rain can be expected on Sunday, while Monday will be windy with sunshine and showers, these perhaps wintry over high ground.

North-West

• Saturday to Monday

Saturday will begin with brighter spells, though with showers at times too. Light winds and average temperatures: maximum 9C. Sunday and Monday will see a mixture of some brighter and drier intervals, though still with a risk of showers or longer spells of rain at times. Generally lighter winds with temperatures close to average.

Scotland

• Saturday to Monday

The Highlands and Eilean Siar; Grampian; Central, Tayside and Fife; and Strathclyde regions are all subject to weather warnings until 3pm on Sunday. Sunday is expected to be cloudy with patchy rain, with brighter spells by Monday.

Northern Ireland

• Saturday to Monday

There will be a damp, murky start to Saturday, with some fog but gradually brightening from the south with some sunshine breaking through. The highest temperature will be 9C. Sunday and Monday will be bright and mild with some sunny intervals along with a few showers.

Wales

• Saturday to Monday

There will be some brighter spells to start the weekend, though with showers at times too. The maximum temperature will be 9C, with light winds. Sunday and Monday will see a mixture of some brighter and drier intervals, though still with a risk of showers or longer spells of rain at times. Winds will be lighter, with temperatures close to average.