My RV is bristling with custom fabricated Hail cannons!

I jump around inside on my modified pogo stick wearing my special tin foil coated armadillo hat, pressing a flatulent red button over and over whilst blasting Wagner's flight of the Valkyries over and over again at maximum volume.
It is 100% effective!!!!, but only if If play some
Mussorgsky when the storm approaches and when I prime and load the cannons with my special ingredients.
I've never suffered any hail damage since I started doing so.
And fun to boot!
Highly recommended!