I don't think you understood.
Snowfall is rain for cold domains and doesn't mean anything other than you are fighting in a Cold Dominion with the "Rain" effect which in and of itself has certain modifiers for certain races.
Storm isn't based on temperature only spells and items (I don't play with the sound on, so I forgot about the thunderclap). I believe the exact formula for what your lowered precision is 1/2 your base value + bonuses (from items, experience, etc). It stops all flying from anything but: Spring Hawks, Air Elementals, Storm Demons, Horrors, Queens of Elemental Air, Sylphs, etc any flying unit equipped with the magic item "Winged Helm". It also causes Rain, which doubles the fatigue of any Fire spell and reduces the effect of Heat (the ability) from Abysians, Fire Elementals, Fire Drakes, Summer Lions, Kings of Elemental Fire ... etc.
Cold Blooded get at least double fatigue in Cold Provinces (Maybe more I don't know the exact #, but I would not advise fighting with them in Cold Provinces).
[ January 15, 2004, 09:37: Message edited by: Zen ]