Paul Bartlett wrote:

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.

That sounds as though it might not have been a snow shower but the fog
itself suddenly precipitating out. Same thing happened in Dec '62 when thick
fog precipitated out in the form of quite large flakes of ice needles
revealing a clear blue sky.

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

On Dec 19, 7:54*pm, Paul Bartlett wrote:
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.- Hide quoted text -

- Show quoted text -

Graham, sorry I missed the point of my gentle crystalnacht. I reckon
it was a case of the YS/T curve or summat what I were taught ages
ago. Simply explains why ice crystals grow at the expense of water
droplets.
Cheers Paul.

"Norman" wrote in message
...
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.


Snow showers in hill fog are commonplace. Anywhere in this country above
300m
and sometimes lower than that will experience snow showers in fog quite
often.

Norman

Certainly common on Dartmoor, I have walked numerous times out in heavy snow
and fog, usually above 400 metres altitude. Fog and rain is even more common
:-) Even today there was thick mist and light snow on Hay Tor summit.

Will
--

On Dec 19, 8:37*pm, Graham P Davis wrote:
Paul Bartlett wrote:
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.

That sounds as though it might not have been a snow shower but the fog
itself suddenly precipitating out. Same thing happened in Dec '62 when thick
fog precipitated out in the form of quite large flakes of ice needles
revealing a clear blue sky.
Graham, that is exctly what it was. Coningsby Jan 1963: -19.6C 6/8CU
MOD fell out to leave a cloudless sky at
0830. It amazed me but these were isolated star like crystals as the
manuals used to say - more magic.
Cheers Paul

"Paul Bartlett" wrote in message
...
On Dec 19, 7:02 pm, "
wrote:
On 19 Dec, 18:43, 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?

--
Nick Humphries, http://www.egyptus.co.uk/
Your Sinclair Rock'n'Roll Years http://www.ysrnry.co.uk/
YSRnRY documentary http://www.ysrnry.co.uk/tvprog/
The Tipshop http://www.the-tipshop.co.uk/
ZX Video and WWW Alertshttp://www.the-tipshop.co.uk/cgi-bin/rsscheck.pl

Hi Nick

I was in Castleton in the Peaks today and over Mam tor that was the
what we got. After earlier showers the cloud base dropped before
another shower came over.
Simon. I used to go up Back tor years ago. A good mountain with a
track up from Strines Inn. Had Wallabies in those days, turned loose
by Glossop zoo in the War; been told they have died out now - sad.
Anyway I often went on my own and got caught out around Jan 1973 in
snow and fog, just came down and 200M in snow and fog is not nice
needed compass to get back, frightening. On low groung though
visibility in fog tends to improve in rain or rain showers, seems a
straightforward case of coalescence.
Cheers
Paul.


A lifetime of hill and mountain walking lead on from our 2/3 forays into the
Pennines Paul!

Trevor
East Yorkshire