I have four cameras set up watching most of the yard that all display on a 24" monitor. Looking at them everything is mostly still, trees just barely waving.
On radar, I see an outflow boundary coming that looks to arrive very shortly.
Cameras show mostly still .... then all of a sudden, everything goes tilted, stuff starts blowing around on the ground, cameras are shaking like crazy.
10-15 minutes later, it's all mostly still again, but quite as still.