Rain and thunderstorms often carry a dark aura with them. Appropriate to the topic, I present you a forest atmosphere in black and white optics for four hours.
If you suffer from insomnia or cannot fall asleep, this can be very useful. People hear nature sounds in many different ways to relax, fall asleep or just to calm the soul. Natural sounds can also reduce stress or anxiety. Some others use it to study or meditate.
Enjoy the rain & thunderstorm!