In the foreground, ‘under’ the huge thunderhead, and to the left of the lens flare, thee’s a faily large ‘whispy’ that seems much brighter than the clouds around it. Does that qualify it as a noctilucent; or is it not that high?
Not an expert in clouds, but it might be a cirrus. Noctilucent clouds as portrayed in images in Sky & Telescope are usually like ripples on a pond. Still very high, probably just as high as the anvil top.