"Will Hand" wrote in message
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"Col" wrote in message
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"Rob Brooks" wrote in message
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At long last A High of significance - had a quick look back at my
pressure readings this year and today has seen the highest pressure in
Leeds since 17 March. It's now 1038mb and still rising.

Is this really surprising, though?
In terms of pressure readings isn't a winter anticyclone likely to be
more
'intense' than a summer one?

dynamics lesson
Why? And don't say because the air is colder as that would not be the
right answer, this high has 552DAM air entrained. The reason is all in
the dynamics - this high developed at the left entrance of a confluent
relaxing upper trough and right exit of an Atlantic jet both regions of
upper level convergence due to ageostrophic wind components. Also we had a
deep low with a lot of wind and kinetic energy which has been converted to
potential energy helping to raise pressure substantially. This is a warm
and intense high.
/dynamics lesson

Will, I don't understand any of that
--
Col

Bolton, Lancashire
160m asl