Thunder Sounds — Distant Storm With Lightning
Thunder is best layered under a base of rain, where the two together make a full storm with more presence than rain alone — useful for sleep when you want something heavier. On its own it is dramatic rather than background.
Thunder brings in a rolling, distant storm along with an occasional flash of lightning across the scene — heavier and more textured than rain alone.
Pairs well with rain
On its own it's dramatic; mixed under a base of rain it turns into a full storm, good for sleep when you want more presence than rain alone gives.