Frank Ch. Eigler wrote:

The sudden part of this phenomenon probably corresponded to a large
change in angle of attack of the jet (perhaps increasing as it slowed
down), which in turn changes the pressure distribution around the
wing.

Or perhaps a transition from level to climb. Watching the RADAR on
occasion, it looks like that happens with some frequency right around here.

I'm going to spend some time with my camera sitting in the yard on the next
day like that. It would make for some great shots if the atmosphere and
ATC cooperate grin.

- Andrew