It's beautifully cloudless this morning, about fifty degrees, and today's high temperature will reach seventy — although Cleveland was graced with a comfortably warm day or two last month, the coming week's forecast ensures that spring has definitively arrived. We might even see some leaves unroll. As usual, National Geographic has proven itself remarkably pertinent to events at hand: thunderstorms have been predicted in my area for tomorrow evening and Monday, and Geographic's latest issue leads with tales of tornado chasers. Have you ever seen a photograph of the tornado's fabled ability to "snap telephone poles like toothpicks," or a view straight up a funnel itself? This issue has got them both. In glossy foldouts. If you're heading to a newsstand, grocery store, book shop or doctor's waiting room, drop a little petty cash for a copy. Until then, there's a Flash presentation on Geographic's website.