A colon should only be used if the sentence before the colon is an independent and complete thought. The colon should be able to be replaced by a period and the information after the colon removed
I found the mom the most interesting because she didn't have her son with her and she was not paying attention to her son while in a public place where anything can happen.
The part where it talks about Tom believing the storm hit to insinuate that God’s wrath was directed at him, is where we see that the storm represents Tom’s conscience. Hope this helps.
