In article , Iain Mackay
writes
Encouraged by a forecast of "cold and clear with wall to wall
sunshine" in
the West of Scotland last Friday, I travelled from Perth (in the East
of
Scotland) via Fort William to the Isle of Skye and finally up to
Gairloch in
NW Scotland.
The only thing that was 'wall to wall' was the layer of gloomy grey
cloud,
and with the exception of a tiny patch of sun at Kyle of Lochalsh, we
never
saw the sun all day.

.... there are still serious problems with low-level cloud within the
atmospheric boundary layer - Stratocumulus is fiendishly difficult for
the models, even at high resolution, to capture (analyse) and forecast
properly. When you see the cloud we have outside now (Bracknell/southern
England), it's not particularly thick, and now and then a little gap
appears - how on earth a model is going to handle that is beyond belief.
Marine-based SC especially can behave differently from that formed (or
moving) overland - another variable in the mix.

Martin.


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