i wonder if it's because even tho a storm has passed, there is still the threat of lighting sometimes. and you know how your hair stands on end when lightning strikes close? i wonder if cats can sense this electrical sensation more than us. they say that cats can actually HEAR electricity go from a light switch when you flip it, flow to the light before it comes on. their hearing is so acute and they also have elevated senses. you'd think their whiskers would be pulling in all kinds of "data" in a storm.