I didn’t see any nymphs emerge and undergo ecdysis tonight, but I did find plenty of cicada chimneys and nymphs trapped under slates.
Cicadas build chimneys above their holes, typically after it rains a lot and the soil becomes soft. The chimneys help keep water from rushing into their holes, and they keep ants and other menaces out.
A good place to find cicada nymphs is under backyard slates (or similar objects that cover the ground). Flip over your slates and you might find a nymph tunneling their ways to the side of the slate.