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Old June 25th 18, 02:17 PM posted to uk.sci.weather
N_Cook N_Cook is offline
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Default Where has the rain gone in the south?

On 25/06/2018 12:44, wrote:
On Friday, June 22, 2018 at 11:03:30 AM UTC+1, wrote:
Has it all be diverted north due to the jet stream or are there just fewer
and/or weaker weather fronts forming in the atlantic this year? I notice when
has front has crossed us in the last month or so its been a pretty feeble
affair.


I have been wondering the same. No proper rain in Horsham since April. This is following months of dull damp weather from August last year to April with hardly any anticyclonic conditions. I don't get why the weather these days seems to get stuck in a rut so often.


A lot of maths on a planet-scale in this
http://www.pnas.org/content/early/20...00110.full.pdf
but basically , The Rockies and/or the Himalayas can force the northern
jetstream into a quasi-resonant, self sustaining sinusoidal structure,
following its own tail, for a time.
Seems plausible
To which everything else is locked/blocked into