Before I forget... If a biome specific storm like, say, a sandstorm or some elemental tempest moves into another biome, would it dissipate or keep going?
The plan is that it would keep going so to speak... the conditions that caused the whether would continue to move and evolve. A sand storm wouldn't travel far on non-sand but the winds would.
A better example is a rain storm that if it moved over an icy tundra might turn to freezing rain if the conditions there were right for that.