Monday looks and absolute horror show on the 12z GFS. I can deal with a bit of rain but under these temperatures, in August?!
That chart above shows a ridiculous contrast in temperatures over northern France as well, with some heavy rain to blame.
As Thermohaline Conveyor alluded to earlier, there is the prospect of a few thundery showers developing behind the front, chiefly in the south and west. CAPE + LI charts show a marked upgrade in potential compared to yesterdays 12z, which limited potential to Ireland only. However I can't shake the 'straw clutching' vibe off with this. It's all we got!
Deep into FI, the early September burst of warmth is still there, but it has been pushed back a day or so with a rather dreadful weekend to round off August.