What is a big bowl of red fireball in rainy days?

Spherical lightning. It usually happens in thunderstorms, and it is spherical lightning. This is a real physical phenomenon. It is very bright, almost spherical, and its diameter is about 15 to 40 cm. It usually lasts only a few seconds, but it also lasts 1 to 2 minutes. In addition to the common orange and red, there are yellow, purple, blue, bright white and dark green auras, showing a variety of colors. On a rainy day, I saw a bowl-sized red fireball, which was spherical lightning.