Any conditions with extremes and compounds where cells butt against each other and form self-contained weather loops suspended vertically.

E.g. A heavy hot gas layer with a lighter "water" layer above it (or whatever the precipitation medium is); so the precipitation collects, falls, hits the hotter bottom layer, and evaporates up to condense and collect again without ever reaching the surface of the planet. From a surface observer's POV (within or below the hotter gas layer), this would be a continuous rain event that never reaches them and just loops itself in the sky.

Reasons to hire a professional:

• not dying
• not burning your house down
• not voiding any future insurance claims
• not being liable for any damage for future homeowners (if you sell)

Could have evolved to be an environmental variable?

Like when sea turtles lay a clutch of eggs in the sand, the ones closer to the surface sand might be warmer, the ones in the middle might be warmer, ones that hatch closer to dawn might be warmer, etc.

Might just allow for randomness in the sex mix of any individual batch of eggs, that gets smoothed out by the variation across any breeding season.