It was my Dad who came up with the saying that it snowed either north of the A5 or south of it, but rarely across it! In 2009 it was true at times when Birmingham had snow and we had little,but of course it is just a quirk of the weather.
Saying that there are a few zones more prone to snow than others, the North Norfolk coast for instance in a northerly outbreak, or indeed closer to home the Cheshire gap.