Heavy rain and snow is set to cause travel chaos across the Westcountry.
Up to four inches of snow could fall on upland areas of the South West on Friday, while a few centimetres may be seen in East Devon.
Some 20mm of rain is expected to fall in Cornwall during a ten-hour period from the early hours of Friday morning, combining with strong winds of up to 50mph.
Freezing temperatures will be felt across the region with people being advised to take care and monitor forecasts before going outside.
The Exeter-based Met Office has issued a yellow weather warning for snow in Devon on Friday.
A band of rain will push into the west on Friday morning, turning increasingly to sleet and snow.
Met Office spokesman Dan Williams said: "The real talking point is the band of weather coming from the Atlantic interacting with cold air.
"That will come down as rain across Cornwall and parts of Devon, but there is the chance of snow on higher ground and in East Devon."
"The heavy rain could disrupt travelling conditions. We would advise people to exercise caution."
Steve Crosthwaite, head of the Highways Agency's National Traffic Operations Centre, said: "We advise drivers to check road conditions and the Met Office weather forecast before they set off and during severe weather to consider whether their journey is essential."
Saturday is expected to remain largely dry with the possibility of some showers, but forecasters warn ice will continue to be a risk, especially at night.