translation for storm

hi, i was hoping someone could help with translating "storm-watcher" into either sindarin or quenya. i'm fairly sure "watcher" becomes "tir-" in both, but i'm not sure how it would combine. quenya has "vangwa" while sindarin has both "gwaew" and "alagos" for storm, unless there's another translation i missed. any help is appreciated!

I’d work from a primitive form like *Wagmetīr(ō) to produce Q. Vangwetir or Vámetir (the result of that ancient -gm- sequence isn’t totally clear) and S. Gwaevedir.

those work great, thank you for the help!