I don't know why, but I've always liked the sound of the word, "impend." Derived from a Latin word meaning " to hang over" or "to suspend over," it's almost onomatopoeic, for one thing. A bit like "dum-da-dum-dum DUM!" "ImPEND!" See? :-)
An impending event, despite possible danger, always seems weirdly romantic somehow. Like a tornado headed in your direction, it has a push/pull effect. Curiosity makes you want to sneak a look at the twisted thing, but another part of you just wants to dive for cover.
"Depend" is much less interesting, its derivation coming from a word meaning to "hang from." Pendants depend from chandeliers. That could be a big deal, depending upon whether or not you are standing beneath one when a tornado impends.