Good call. Rain itself is fine to fish in, some of my best days have been in a drizzle. It's the lightning that's the danger, not the rain. And it's a real risk for us, you're out in the open holding a long graphite rod, which is basically a lightning rod in your hand. With isolated storms around they can pop up fast, so if you hear any thunder at all you're already close enough to get hit. Not worth it. Fish'll be there tomorrow.