GeoffC wrote in message . ..
On Wed, 16 Jun 2004 15:39:08 +0100, "Paul Saunders"
wrote:

Weather forecast was good yesterday - bright clear sunshine in South
Wales, temp 27 degrees, cold front to the north moving south but not
expected to arrive until evening at least.

Perhaps you listened to the same forecaster as we did - we should make
an effigy of him to stick pins in...


I went there last summer (the Saturday of the August bank holiday
weekend) and equally bizarre and unexpected weather occurred, so maybe
it's just the topography of the area. "Warm sector" conditions of low
cloud clearing to sunshine were forecast. That indeed happened at
first but in the afternoon a group of heavy cumulonimbus-based showers
developed in situ (not at all typical "warm sector" weather), a
particularly nasty one to the southwest. They were very slow-moving
and seemed to move in one direction then the other (some were moving
from the northeast, others from the west). Luckily none passed
overhead but at the same time mist appeared from seemingly out of
nowhere, not particularly thick but enough to obscure the hitherto
amazing view.

Wonder if anyone from uk.sci.weather could shed some light on this?
(Saturday August 23 last year, Mynydd Du also known as the Black
Mountain, South Wales). Meant to mention it last year but never got
round to it....

Nick