What saves us each winter (in brum) is our elevation. We do very well in terms of 'cold' and can see some really nice low temps and frosts. However, in general, any atlantic snowmakers tend to get broken up/dissipated by the welsh mountains before they reach us.
Personally, I've never known a cheshire streamer produce a dramatic snowfall in brum. We do get snow - but as i said it's due to our elevation.
The ideal set up (in my very inexpert opinion) is an embedded cold pool, followed by a massive atlantic system sweeping quickly over us, followed by the famed 'beasterly' A girl can dream!!
ps: Lamp post watchers - my council is putting in fancy low energy LED lamps on my road next week - will this ruin my snow watching?!