"John Hall" wrote in message
...
In case Stuart is a beginner, I feel that I should add the caveat: this
is assuming that you actually get some precipitation rather than it
remaining dry!
--
John Hall

Hi John,

If no precipitation was possible with sub 510dm air this assumes an
inversion of sorts relatively near to the surface (not a great depth of
instability is required at such low temperatures to create precipitation).
Therefore, sub 510dm air with an inversion would imply very cold surface
conditions, something I wouldn't be a particular fan of !

Joe