Re: today's imagery

Robert Moore

The following is a comment on today's Channel clouds by my TORRO colleague Nigel Bolton:

'This cloud formation is the product of a convergence line that frequently develops across Channel waters during cold northeasterly airflows. As the land is colder than the sea, a land breeze develops, so the wind blows offshore, in this case from both northern France and southern England. Where these winds meet, there is convergence and a line of cloud develops.

A similar effect occurs over SW England in the summer during southwesterly airflows. This time the land is warmer than the sea, so sea breezes develop and a line of cloud stretches northeast across Cornwall, Devon and Somerset and sometimes beyond.

This effect was partially responsible for the Boscastle flooding on the 16th August last year.'


--On 23 January 2005 14:37 +0000 Robert Moore <> wrote:

This is not of any great importance, but I hope of some interest. If you
run an HRV false colour animation for the UK today you will see (at
least) two bits of interesting cloud imagery: (1) over Scotland, high
thin cloud is racing southwards over much lower static cloud (which has a
wave structure). (2) In the English Channel after clouds pass through the
Straits of Dover they can be seen forming a long thin line just off the
French coast - with the UK coast clear.
I think I have seen this latter phenomenon discussed previously in
meteorological circles, but I forget the details. It is an example of
something or other!


Robert Moore

44 (0) 1352 714456

Professor Robert Moore
Department of Sociology,Social
Policy and Social Work Studies
University of Liverpool
L69 7BZ

44 (0) 1352 714456

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