On Dec 19, 7:21*pm, Graham P Davis wrote:
Nick Humphries wrote:
Hi there, long-time lurker, but have been following this newsgroup closely
over the past couple of weeks watching Will's very early snow prediction
coming to pass - very exciting to follow! What was the phrase that hooked
me in? "Significant snow event"?

Anyway, I'm modelling a wintry scene in 3D on the computer for an
animation, and would like to know if it's possible to have a snow shower
whilst there's heavy fog?

It would have to be one that has been advected from elsewhere. I can't
recall seeing this happen for myself but I do remember forecasting one for
Wattisham about 35 years ago. I'd been tracking it northwards(!) across
Essex where it had been giving heavy snow. I'd had reports that the snow had
reached the edge of the airfield so I went into Met Briefing at 0830 - when
we still had dense fog and sky obscured - and confidently forecast snow
would occur very shortly. As I left the control tower at 0845 to head home,
the fog suddenly cleared to show a clear blue sky.

If the shower had made it to the airfield before dissolving, I'm not sure
what the effect would have been on the fog. The snow might have triggered a
glaciation of the fog to turn it to ice fog, which often leads to a thinning
of the fog. I've seen this happen when a slight breeze shakes hoarfrost from
the trees and a water fog has suddenly changed to an ice fog.

--
Graham P Davis, Bracknell, Berks., UK. *E-mail: newsman not newsboy
"I wear the cheese. It does not wear me."

Graham, I reckon snow showers on low ground disperses fog, as does
rain Was at Binbrook in 1965 and we were in fog only just below 0C,
the whole lot fell out in a myriad of crystals,plates and needles at
0200. Over a snow cover, and left a starlit night - never forget it a
wonderful sight.
Cheers Paul Rutland.