A real thunder type summer sky seen today in Surrey and Sussex with
altocumulus almost of the castellanus variety and a sultry feel to the early
afternoon. In summer it would have been a hot day breaking down to
widespread storms. I wish I had kept a record of such days over the years to
see any pattern to the first date of a thundery sky observed. Must have a
more detailed look at my records.

Ian Currie, Coulsdon.
www.frostedearth.com

On Mar 15, 7:26*pm, "Ian Currie" wrote:
A real thunder type summer sky seen today in Surrey and Sussex with
altocumulus almost of the castellanus variety and a sultry feel to the early
afternoon. In summer it would have been a hot day breaking down to
widespread storms. I wish I had kept a record of such days over the years to
see any pattern to the first date of a thundery sky observed. Must have a
more detailed look at my records.

Ian Currie, Coulsdon.www.frostedearth.com

It certainly looked like that, and later there was a lot of
rather threatening-looking middle level stuff. But there was no drama
to follow, just moderate rain at worst with a temperature of about
9°C. Oh, well, a nice summer while it lasted.

Tudor Hughes, Warlingham, NE Surrey, 556 ft.

Similar situation here in France yesterday. The morning was warm and
humid (temp reached 20), and thundery looking, with a light north-
easterly breeze. The pressure fell from 1011 mb at 07:00 to 1003.7 at
15:30. From around 16:00 the wind veered into the south west and
increased, gusting to 35 mph, heavy rain started, there were a couple
of flashes of lightning and the pressure shot up to 1012 mb by 20:00.
Typical cold front progression around these parts. First thunder of
the year! (the last recorded thunder event was in September last
year).

CK, Correze, France