It's a cool gray day (44° F) here in Livermore, interspersed with bouts of sunshine this morning. I was sitting in the bedroom, drinking coffee, when a low, rumbling, peal of thunder sounded. It was only one, but it startled the cat, and set a few of the neighborhood dogs to whining. For thunderstorms, that's all you usually get in California, at least, these parts of it. I was intrigued and went to the window to check the developments in the natural world and see if the sky was going to offer an encore, once more, with feeling. I was treated to the sight of BB-sized hail bouncing in the grass.