On Sunday, 5 June 2016 15:59:03 UTC+1, Jumper wrote:
Over the past two months, why have we had slack areas of Low or High
pressures over the UK and Europe? Also, the over the last two months,
the jetstream has been acting strangely with it even going retrograde (E
to W). April felt like March and May felt like April, with the winds
mostly coming from the northern half of the compass. Even the first
three days of June felt like April, with it being warm in the day, and
cool in the mornings and evenings. Why?

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Yes, odd indeed. I think it's a lot to do with the persistent 'cool blob' in the N. Atlantic, which the MO tells us may be v. persistent. Us OAPs will remember it as the 'cold pool' of the mid-1960's.
The effect was much the same-dire summers down the E. coast with July max of about 10C if the sun didn't come out, but drier and somewhat sunnier on the W. coast. This summer I believe is going to be a rerun of 2015 (and 1965!)