This summer and fall seem like they’ve had more tropical storms than ever before—not a week goes by that there isn’t a hurricane bearing down on Hawaii or spinning off the coast of Mexico, or a typhoon running over Guam or the Philippines. All of that tropical storm activity means a lot of interesting swells from unique angles, and this week’s Walaka swell was no exception. The last remnants of the Walaka swell are slowing fading away, but there is already another hurricane churning in the east Pacific, and this one looks like a doozy. Hurricane Sergio is currently sending...