On Saturday, 21 March 2015 09:12:28 UTC, wrote:
On Friday, March 20, 2015 at 11:14:07 PM UTC, David Mitchell wrote:
Possibly true Col, observing snowfall is one thing, but recording depth is when some people's imagination takes over.
Indeed 
I can never bear to report snowfall in millimetres. If the fall is that slight it is aa 'covering' or a mere 'dusting'.
I've even seen poeple here report snow*drift* depth in mm, though I think (hope) that was done tongue in cheek 
Col
Never liked the term 'dusting' as it implies dry which means it would blow about but essentially stay. Usually its more like a 'dissolving thin veneer' of snow. Especially really light showers.