Answer the question please where did the lightning come from athiests love to sidestep this question and throw up a debate tactic to get you you on your toes. So its science to believe that design can come without a designer that takes more faith to believe in this then it does to believe in god. Engineering the science of design often seems to use design principals found in nature now explain how it happened by PURE CHANCE
I asked you what what I asked because I'm trying to figure out whether the answer you want is one in accordance with empirical evidence or if you just want to fill in every unknown gap with the god of your choice.
But fine, if you want to know the basic scientific answer, lightning occurs as a result of natural processes carried out by natural components required for lightning to form. How exactly? Well, from what I've read, it's still being looked into by scientists. So the current answer is that there's not enough information at the moment to know how exactly they form. But I doubt God is acting like Zeus and throwing lightning bolts whenever he's in a bad mood.

And no, no pure chance here. At least not in the way you're probably suggesting. No lottery is won when things happen. They just happen. The world came to be because things happened (eventually, gradually, and naturally) that led to the formation of this planet. Life came to be because things happened (eventually, gradually, and naturally) that led to the formation of life. We came to be because things happened (eventually, gradually, and naturally) that led to our existence.
It may seem like it's all magic, but if you were to be an immortal soul who started existing the moment the Big Bang occurred, you would've seen how things just naturally happened via natural processes that led to the formation of this world, of life, and of human beings.
I'm not an atheist, by the way.