Snow's been falling for most of the night in parts of south-east Wales, and the Met Office says there's more to come.
An amber 'be prepared' warning will remain in place until 9am, with a yellow warning of ice across the whole country.
Cardiff and Vale University Health Board has cancelled the majority of outpatient appointments.
David Wood reports from Porth, in the Rhondda.
More top news
Kirsty Williams successfully defended her Brecon seat, but her party lost four others in a disastrous night.
The body of 75-year-old Iris Owens from Ystrad Mynach was found on Tuesday.
Tree pollen levels remain high over the next few days, but they will fall during any showers over the weekend.