There is a magnetic field around the earth. (That's how compasses work.)
Magnetic fields and electric current interact with each other.
There is a current flowing through our upper atmosphere made of ionized gas. (ionized means that one of the electrons is stripped or an extra election is added, making the molecule electrically charged.)
The flow of the current is not uniform. Some areas see a lot of current, while others see hardly any.
Water is attracted to electric charges and even magnetic fields.
Tiny drops of water in the atmosphere can be attracted to these currents.
Clouds are made of tiny water droplets.
This may be just a freak cloud created by a lot of the current in the upper atmosphere flowing through a particular spot due to the magnetic field of the earth.
You know why I know you know your shit? You explained a complicated phenomena in a way a 12 year old could understand.
This guy science's, thanks for the explanation.
Electric current caused by a wormhole, lol.