"Graham Easterling" wrote in message
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On Saturday, November 29, 2014 9:14:59 AM UTC, haaark wrote:
On Friday, 28 November 2014 14:53:29 UTC, Graham Easterling wrote:
The easterly wind topped F7 this morning on cliff tops, gust of 48kt at
St Ives, 39mph at my station well back from he sea front.

This strength of wind straight from the east in late November, and yet
the temp has peaked near 15C! Max of 14.8C in Penzance, 14.2C even in
the near gale on top of the Island St Ives.

No dark easterly either, virtually cloudless from 11:00-14:00. Great
windsurfing conditions at Marazion
http://www.easterling.freeserve.co.uk/marazion.html

Possible to sit in west facing shelter, in the sun, and have a pint.
Has anyone tracked the air backwards? if so I'd be interested.
Back in 2010 during an easterly on 29th November, it was 11C colder.

Graham
Penzance

Vindicated! Thanks Graham.
There are two factors here which fascinate me. I have never seen a Tc flow
coming from so deep in the Sahara as this morning's chart indicates,
although the chances of such air getting here are effectively zero
.http://www.westwind.ch/?link=ukmb,ht...racknell+13 2
But what modified air we have already got may very well allow for
considerable warming today. We may break a date record.
The other factor is this airstream's potential for producing a foehn.
Yesterday Innsbruck briefly reached 15C in the afternoon, and at 3am today
three Swiss Alpine villages just S. of Zurich were each at 19C-although
Zurich itself stayed at 3C. I expect the phenomenon will be more
widespread today, although such a dry airstream may not have had the
opportunity to pick up enough moisture while crossing the Med. to produce
a well-developed foehn.
I've experienced two foehns. The first was when skiing in the Bernese
Oberland. After 4days of crisp subzero skiing we set off into slush and a
temp. of 12C. The sun was shining through thin low-level ice just above
our heads, producing the best multi-coloured iridescence I've ever seen.
That, combined with the crack of snow cannon and subsequent roar of
avalanches made for an eerie day's skiing.
The other was while sitting outside at a bar just N. of the Oberland
massif at the end of February. The fag-end of the foehn cloud-basically
aC- was dissolving as it fell off the massif. The temp. was low to mid
20's C, and the air was as dry as a board, so dry that when I wound my
film on-this was forty years ago!-I heard the crackling of
triboluminescence and the film was covered in sparks when I developed it.
The final feature was that air was dead calm for minutes at a time, and
then suddenly massive turbulence erupted for 30 seconds or so with wind
speeds of probably 15-20 mph-then it would go dead calm again.
You're never bored in a foehn!

Widely over 15C in west Cornwall today. 15C at Camborne, 15.3C max at Land's
End, 15.2C max at my Penzance station etc. Virually unbroken sunshine and
light winds to go with it.

The light breeze was onshore in Penzance. Around Marazion/Perranuthnoe
thebreeze was offshore descending from the moors south of Camborne/Redruth,
so I strongly suspect it topped 16C in those areas. (The closest we get to a
foehn!)

Sennen with a just superb wave
http://magicseaweed.com/Live-Sennen-Webcam/65/

Wow!

=============

Cloud, mist, fog and light drizzle up here. Par for the course for filthy
mild tropical air in autumn.
Max. a very mild +11.1C.
Wow! Not.
Looking forward to the polar air after Monday in what looks like being quite
a clear and cold, frosty high, at least at altitude.

Will
--
http://www.lyneside.demon.co.uk/Hayt...antage_Pro.htm
Will Hand (Haytor, Devon, 1017 feet asl)
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