In article ,
Phil Layton writes:
A light snow shower this afternoon has recorded the 11th consecutive day of
snow here. However, I dont think I can record any with snow lying at 09Z,
with only patchy covering (ie. hard surfaces have generally melted) and
amounts not more than 0.5cm.

Martin - could you remind me what % counts as 'snow lying ' ? If one had 90%
grass covered but 10% drive not - does that count ?

I don't know if the definition has changed, but didn't it use to be 50%
cover of the area representative of the station? So if there's a lot
more grass than drive (as one would expect), then your example would
count as a day with snow lying. At Cranleigh, we had 3 consecutive days
last week which just about qualified at 9am, even though the covering
was very thin in each case and had almost all melted by a couple of
hours later.
--
John Hall
"One half of the world cannot understand
the pleasures of the other."
From "Emma" by Jane Austen (1775-1817)