Trappes 12 UTC sounding shows moderate latent instability overlapped with strong DLS and LLS as well with prevailing SSW-ly flow. Strong short-wave has contributed to the widespread initiation of DMC attm and coverage should increase further towards the evening. Backed low level flow ahead of the frontal boundary is suggestive of enhanced SREH in the warm sector of the low. Conditions look very favorable for well organised convection. Scattered multi/supercells will likely merge into a quasi-linear MCS with potential for severe to extremely severe wind gusts. Low LCLs as suggested by rather low dewpoint depressions and strong LLS also point to the tornado threat, either from supercells or LEWP in the MCS. Large hail threat might be present with the more isolated convection, especially supercells but will likely diminish towards the evening.
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