Azores High Expansion
Added : Friday at 13:45
As we write this article and look outside on what is another rather disappointing day for Spring in the UK with showers and a chill to the wind, our mind sets off across the Atlantic to see what our old friend the Azores high is doing.
It's probably worth remembering that our forefathers knew May can be a rather rubbish month and always told us "Ne'er cast the clout before May is out..." whatever that means...
Anyway, back to the Azores and you can see the ridge out there next Tuesday :-
Not particularly dominant, but into the following week and the general trend is for the ridge to strengthen :-
The reason for this is all down to the ITCZ which is still moving North as we head towards the Summer Solstice :-
You can see this up well off the East coast of Africa and it's the band of latitude on Earth where the sun is directly overhead and hence the rising air causes thunderstorms which is then deflected at height to the North and this creates the semi permanent area of high pressure across the Azores.
So, as we move through May and into June, so the ITCZ moves North and the Azores High continues to expand and move North too. That's the theory anyway, until then hang onto your clout (if you have any of that, if not, am sure you can buy some on Amazon...)
METEOROLOGIST : MARSH