Max-Q condensation shocks hi-res pictures in this tweet.
Chris #1 tweeted this out, so it's worth clarifying that these condensation clouds are NOT necessarily indicating Max Q. A vapor cone typically occurs as the vehicle approaches transonic speeds, which MAY happen to coincide with maximum dynamic pressure, but not necessarily. In fact, in orbital rocket launches, Max Q normally occurs in the low supersonic regime, right? (It depends on the acceleration profile, which depends on the thrust to weight ratio.) So Max Q is more like a dozen seconds or so after the transonic regime in which a vapor cone is seen.These kinds of condensation clouds can be observed on humid days on regular airliner wings or engine nacelles as they approach or depart an airport. And those are hardly transonic or even Max Q scenarios.This kind of image is also sometimes mislabeled as "breaking the sound barrier". Nope, not that either, but typically close in time, as per above.
Many thanks Steven!