After a mild start to the year, Met Office forecasters are predicting that it will turn colder over the next few days.
It has issued yellow weather warnings for snow and ice for Saturday and Sunday for Caerphilly County Borough.
Whilst temperatures are set to be much lower than the last week or so, there is a lot of uncertainty about how long the cold weather will stay and exactly which areas of the UK will see snow.
The reason for the cold weather is that an area of high pressure develops over Scandinavia, allowing cold air from the Baltic and western Russia to move towards the UK. At the same time milder air and Atlantic weather systems are trying to push in from the west, leaving the UK as the battle ground where they meet.
Paul Gundersen, Met Office Chief Forecaster, said: “All parts of the UK will see cold weather setting in over the weekend. We can expect sleet and snow showers to affect eastern areas at times, but with a battle developing between the cold air in the east and mild air pushing in from the west, no one should be surprised to see sleet or snow over the weekend and next week.”