@Eletrebb mentioned that TotemTimers has been updated (finally) so I downloaded it last night and tested it out.
It. Is. Awesome.
Here are some screenshots of it in action:
I was using Power Auras Classic for all my notification needs, but TotemTimers is way more than just a countdown of how much time your totem has. If anything, I would definitely recommend using it for the Lava Surge proc notification and Fulmination. It can also be set up for Enhancement and Resto specs — awesome versatility!