On Tue, 21 May 2013 16:49:51 +0100, Freddie wrote:

Above 20 C about 20 mins ago but looks like a cold front has just come
through now 11.6C!

Sounds like your temperature sensor might be over exposed -

It catches the early morning sun at this time of year but is in shade from
about 0800. It can be affected by warm air from the shed roof on still days,
there was a bit of air movement but perhaps not enough. Today is hovering
around 15 C.

My real comment was about the rather rapid drop of 8 C or so that I couldn't
match up with anything on the charts. A drop at about 0.5 C/minute over the
15 mins or so with the fastest being quicker than 1 C/min. Sun in/out doesn't
change the recorded temperature *that* quickly.

Still there 'till midnight:

http://www.howhill.com/weather/prev-day.php

--
Cheers Dave.
Nr Garrigill, Cumbria. 421m ASL.

On Wed, 22 May 2013 14:02:36 +0100 (BST), "Dave Liquorice"
wrote:
My real comment was about the rather rapid drop of 8 C or so that I
couldn't
match up with anything on the charts.

There was a convergence zone lying down the Pennines yesterday. I
think you saw a sudden transition from air warmed overland up until
1500, replaced by cooler air chilled by the North Sea as the
convergence zone drifted west under the greater density of the North
Sea air. Not a classic Norwegian cold front, but certainly not
uncommon. You won't see it on a weather chart for two reasons - the
presenters tend to concentrate on and show active weather-bearing
fronts; and they are leery about displaying convergence zones because
they "don't want to confuse viewers".

--
Freddie
Bayston Hill
Shropshire
102m AMSL
http://www.hosiene.co.uk/weather/
https://twitter.com/#!/BaystonHillWx for hourly reports