John Hall wrote:
In article ,
"Mark Chamberlain (Southend)" writes:
On Tue, 29 Dec 2009 06:47:31 -0800 (PST), MahFL
wrote:

Keith..what do you mean by the crucial 3 C dew point ?

I believe that the dew point needs to drop below 0 C as a snow
indicator. I'm sure I will be put right shortly if i'm wrong

I think that the wet-bulb temperature is the critical one. IIRC that
lies in between the ordinary "dry bulb" temperature and the dew point,
Knowing any two of the three temps, I imagine one could calculate the
third id one knew how.

+3.3 Dew Point here atm :-(
4.4°C Dry bulb.
Wind NNE 5mph
991.3mb steady.

--
Keith (Southend)
http://www.southendweather.net
e-mail: kreh at southendweather dot net