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Old December 13th 04, 07:10 PM posted to uk.sci.weather
Joe Hunt Joe Hunt is offline
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First recorded activity by Weather-Banter: Nov 2004
Posts: 203
Default Boundary layer subtleties


"PJB" wrote in message
...
I don;t think there is enough mixing to create the desired effect. It

needs
something like the Welsh mountains to break the sheet up. High Res Vis
Afternoon pictures indicated a slightly different texture the to SCu

sheet
the further north you went, but it would go largely un noticed below i
suspect.
The Inversion is almost low enough in the SE for the tops of the Downs

to
stick through, however as you say further NE the moist boundary layer is
deeper still, and with the lakc of wind, this will make breaking the

sheet
over Eastern England virtually impossible until gradient picks up.

ATB
Paul


Hi Paul,

Thanks for that. Indeed, the inversion is very low and should all the StSc
clear by morning, with the increase in gradient, SE'ners may see a very
white view of the Downs. Rime deposition from FZFG is possible but only if
the inversion lowers a little more. It was sampled by the 03882 ascent as
being around 430m (1400ft).

Joe