Where will it snow this weekend?
Weekend weather – Will it be a bit calmer this weekend?
What about Friday afternoon?
Police Scotland have advised people to return home early in the areas affected by an upgraded weather warning.
They said they expect the worst of the weather to impact from about 15:00.
The Met Office upgraded its weather warning to amber for snow and ice, covering much of Scotland.
The “be prepared” alert is in place for wide parts of the country, including Strathclyde, Central, the Lothians, south west Scotland, Tayside and Fife from 07:00 until 22:00.
Police Scotland earlier increased its travel warning from stage 2 to stage 3, meaning travellers are likely to experience significant delays.
A number of roads have been blocked by stranded vehicles including jack-knifed HGVs.
At 16:40, Traffic Scotland warned that the northbound carriageway of the M77 motorway was closed at Kingswell near Kilmarnock.
Supt Louise Blakelock said: “As we progress into this afternoon and evening, I would like to remind the public of the ongoing risk of disruption due to the forecast.
“If you travel on the road network in the warning area, you will be disrupted and you will face significant delays.
“With that in mind I would urge the public to think and plan ahead for their return journey home this afternoon.”
She added: “Please ensure you are checking the most up to date information from Traffic Scotland and the Met Office.”
Transport Minister Humza Yousaf has warned people to think carefully before setting off.
He said: “If you choose to travel, particularly in the evening peak period, you are likely to face significant delays and disruption.”
A number of schools were closed in South Lanarkshire, the Borders, Dumfries and Galloway, Fife and the Highlands.
School transport was also affected in some areas.
NetworkRail Scotland said it had faced some challenges because of snow. It said teams were working hard to keep tracks free of snow so trains could run.
It said it was preparing to deal with more falls as they arrived in the course of Friday.
ScotRail said it was dealing with weather-related disruption on the West Highland Line at Crianlarich.
Our teams have been working hard to keep the tracks free of snow so trains can run, like here at Gartsherrie pic.twitter.com/pdEMU0m3iR
— NetworkRail Scotland (@NetworkRailSCOT) 19 January 2018
Most of Scotland is covered by a yellow Met Office warning for ice.
The Met Office said snow showers will become heavier and more frequent early on Friday and will continue on and off through the day.
Spells of more persistent, heavy snow are likely. There is expected to be a gradual improvement during the late evening.