GFS 06Z run producing 42-43ºC as a maximum #temperature for the 17th July... here's some points of interest from a meteorological, and climatological point of view... Plenty of discussion of whether this is realistic, or if there is some warm bias, problem with soil dryness/ feedback loops etc.

But, f/c 850mb temperatures are around 27-28ºC - assuming this is at 5000 ft (actually around 5150 ft) supports 42-43ºC in a well mixed atmosphere.

Some model output is currently calling for a very vigorous depression to run by the far NW of the #UK overnight Sunday into Monday... a thread.

A very nice example of a Shapiro-Keyser evolution.

1) Initial development (00Z Sun) takes place in the jet right-entrance. @wxcharts 2) 15 hours later - strong, active warm front, and weak, fractured cold front. Main air mass change to the rear of the developing seclusion.

Typical S-K cyclones forming in the W Atlantic stretch E-W in zonal upper flow, this one stretches N-S as the upper pattern is amplified.