THIS IS AN ADVANCED WARNING FOR HEAVY SNOW FOR WALES AND SW ENGLAND IN PARTICULAR FROM TUESDAY PM AND DURING WEDNESDAY MORNING During Tuesday afternoon, an Atlantic frontal system will move slowly northeast bringing heavy snow inland across SW England and southern half of Wales then spreading further NE across the rest of Wales, N. Ireland and across the parts of Midlands and central southern England overnight into Wednesday morning before slowly dying out in the afternoon/evening, up to 5-15cm of fresh snowfall can be expected widely, over higher ground of SW England and Wales further fresh snowfall accumulations of 15-25cm are possible. The northern and eastern extent of the heaviest snow during Wednesday is still a little uncertain, but at the moment areas south and west of a line roughly from Liverpool to Eastbourne are likely to see the heaviest of snowfall. Outside of this area maybe a couple of cm of fresh snow can be expected during Wednesday as the front continues slowly northeast across central and eastern areas. Away from these areas, further snowfall is possible across the Highlands of Scotland and over the mountains of N England and N. Ireland bringing further accumulations. Hmmmmmmmmmm