The SE seems to be good at catching a watered down version of Europe's weather... a number of days reaching the mid-20's in the near future.
A crucial period for any plume event reaching the UK is in 6 to 7 days time, as a shortwave low near the Azores interacts with a longwave trough to the west of the UK. It seems to be that for the biggest taste of the plume, the shortwave has to track far south enough to avoid merging with the longwave, potentially stalling to the SW of the UK in the most extreme scenario.
Whether attempt number one works out or not, the broad-scale pattern favours further bites of the apple later on in time. The fact that GFS tries again twice in lower-res despite the Atlantic having rather more westerly momentum than seems reasonable (just look at the trough in 8 days time... so flabby!) is a sign of this bRoad-scale support.
The key period for attempt number two looks to be as the shortwave low exits to the NE, as this naturally leads to a further pressure rise over Europe, which could reverse the drift east of the plume and bring it back in our direction.
ECM sets things up well on day 10 - too far out to take all that seriously of course, but a realistic outcome in my view - unless attempt number one manages to go the whole hog, that is:
GFS doesn't manage to achieve much due to the longwave trough hanging around too close to our shores as it fades out. This could easily take place without any upstream trough (SW of Iceland on the above chart) to encourage retrogression of the one near to the UK as the two combine.
So lots of pieces that need to fall in place if we are to see much of a plume event, though I do think this is one of those 'be careful what you wish for' situations, as from what I can see over Europe, a direct hit would have the potential to threaten the high temperature record set on 10 August 2003.
Back then, the heatwave got underway under Europe some time before it first started influencing the UK - which is how it usually plays out.
Okay, the time has come - I'm signing off until 3rd July, Minorca here I come!
p.s. 1st July looks a bit toasty down there. I'm going to have to stock up on water big time!
Originally Posted by: Stormchaser