My last depressive episode a few months ago, I didn't even realize I was depressed (my behaviour changed not my thought processes or feelings) until 1 day I was randomly crying and couldn't pinpoint why... Well then I thought of how my life sucks and then I had an actual reason to cry and cry hard I did...
I probably shouldn'ta done that. Lol

While my episodes are 98% random, the crying is definitely triggered by depression and the thoughts and feelings that accompany it.