You can browse all missile model yourself easily.
Look at editor's main window, there is a preview window on the left. If you place a unit somewhere and select the unit, the unit's model can be seen at the preview window.
Now open Trigger editor (F4). Make sure the trigger editor's window doesn't block the preview window. Create a new trigger. Create new action, Special effect - Create special effect at point. A window pops up, you can see the effect path of Thunderclap. Click on in and then click on Select model button. You can browse the models and see them at the preview window. If a model doesn't appear in the preview window, scroll through the animations in the preview window.