"Col" wrote in message
...

"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
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