yes but I.F was talking about devon and cornwall where this risk is increased and not south wales, that wrap round trough feeding the warmer air has been updated to a front, thus increasing the snow risk id expect up to 2 cm of snow across a large portion of s wales tomorrow morning. tomorrow evening another front moves south across the country and i'd also expect this to follow a more southerly line than being forecast giving a further cm or 2 to areas east of say port-talbot/swansea. As this front pulls away on wednesday morning there is a small chance (20% or so) of another period of snow pepping up across the far south east of wales and the south west midlands for a short time.