It's rather surprising that the heavy thundery rain doesn't merit more than a yellow warning from the Met Office.
The text of the warning does lay it on pretty thick, but you would have thought 40-60 mm in an hour or two would bump it up to amber.
Perhaps the GFS model is out of kilter with the UKMO model.
Although it is very oppressive down here in the South East, under full cloud cover for most of the day, we have only reached 24C. Do we really have the trigger to generate the uplift needed for dramatic storms, looking at the radar over N France right now?
-- Brian Wakem Lower Bourne, Farnham, Surrey http://www.brianwakem.co.uk/weather Live obs @ 17:45:04 : 22.8C, DP 18.1C, RH 75%, 0.0 mm
Not easy to get right but the yellow warning looks to have been extended too far west.