Climate conditions and/or atmospheric changes required for the Everboom

Relating to this question: Ensuring an endless war, and an endless stalemate

In a planet such as our Earth, what climate conditions and/or atmospheric changes would be required for the formation and continual existence of the Everboom - a perpetual cloud cover, where there exists a perpetual lightning storm, that covers the entire world, and blocks people from above from reaching below it, and vice versa, without serious protection.

I'm thinking about a 50 meter thick storm, but if this is too much or too little to come to formation, and to be a serious obstacle for people above and below to cross, I'll change it accordingly - please include this in your answer.

Edit1: People must be able to survive on this Earth, possibly in underground/high altitude floating facilities. So a Venus-like planet might be an interesting example, if it could sustain some breathable, not-melting-the-flesh-off-of-one's-bones atmosphere for the underground caves dwellers.

Unlike the previous question, no magic is allowed here and I'd like to keep technology/intelligent intervention to a minimum - I would prefer this to be a completely natural phenomenon (perhaps with some tech as the catalyst, if needs must).

If this is impossible, extra points if you can point me to something close to it that is feasible (but I don't want to be tagged as an idea generator, so this isn't really part of the question).

posted over 7 years ago

Nahshon paz‭

-2 reputation 7 0 -1 0