On 3 July, 11:55, "Jon O'Rourke" wrote:
"Graham Easterling" wrote in message

...

Dewpoint's still 17C here Will, in fact Penzance heliport's reporting
a dewpoint of 18C. Force 4 SW breeze *taking the edge off the
humidity. Temperature currently just over 20C (11:15). Last nights
minimum thankfully lower at 15.0C. Mainly clear skies over the sea,
small/medium cumulus readily form over the land.

Graham
Penzance

Definitely 'feels' different today but as you say dew points haven't fallen
that much (Exeter currently 14C v 16C this time yesterday). I suspect the
marked changed will come post cold front on Sunday which introduces
theta-w's of around 10-12 more generally compared to the current values of
around 14-16.

850mb theta-whttp://meteocentre.com/models/ukmet_eur_00/ukmetTW_00_panel.gif
T+60http://www.wzkarten.de/pics/brack1a.gif

Jon.

With the dewpoint being very close to the SST lately, the sea has been
steaming at times, very evident over beaches, but right across the bay
the visibility has been poor at the lowest levels. The bottom photo
at www.cornwallcam.co.uk/ shows it up rather well. Distinct line
(around 50') above which the visibility improves

Graham
Penzance