2004 PART 1:
DRAMATIC GUST-FRONT ACCOMPANIES Cb NEAR
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the afternoon of Tuesday 4th May I decided to get out
there to check out some shower activity crossing the
Irish Sea. Often at this time of year the sea is as cool
or colder than the air passing over it, which does little
to assist convection (in early winter the sea's often
much warmer than the air passing over it which generates
widespread convection including winter thunderstorms).
So I headed for the superb viewpoints over the bay, on
the Aberdyfi-Fairbourne coast road....
A distant Cb with a dark base is heading up in
now, a long low cloud is driving along ahead of
the streaks of falling rain and hail. This marks
a front of gusty winds, dragged down by the
downdraughts which form due to friction between
the air and the falling precipitation. This one's
pretty but fairly tame: ones with some of the big
storms in the USA can have a terrifying
Close-up of intensifying precipitation starting
to obscure the horizon...
As the gust-front came overhead the descending
air on the edge of the precipitation was
particularly obvious, with its mammatus-like
appearance making a nice image.
May 2004 had a lot more in store for me as the
next two pages will show.....
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