Ive no idea what conditions must be like down in South Wales, but if their anything like Roman Bridge near Dolwydellan, then its best to stay at home.
Its the first time that ive driven through any significant freezing fog.
It was so cold, that the A/C simply could not cope with the conditions, and there were maniacs overtaking in zero visibility.
Still only 2C in Dyffryn, so the A470 beyond Libanus must be hell on earth, i bet its barely above freezing there, and being above 1400ft, conditions will be unpleasant.
That stretch of road from Libanus to Storrey Arms gets little in the way of winter sunshine, and there has been numerous casualties there in the winter, its a dangerous area for black ice.
Most of the snow has thawed from the top of snowdon, but its the very low temperatures that are an issue.