On Feb 10, 6:39*pm, Dave Cornwell wrote:
Hi Will, I don't know if you remember many years ago sending me a little
* simple rule of thumb for estimating the different probabilities of
snow risk, based on adding the DP and temp together. Well I've used it
ever since and it has proved to be very accurate on many occasions,
today being one such.
I realise there are other more sophisticated factors, evaporative
cooling etc. but it has nevertheless proved extremely useful

imple rule # 1.

When it is cold enough to snow it won't unless it looks like misty
weather and then gets warm.
Hence the saying:
"Warm enopugh to snow."