Tropical Storm Polo has barely had time to earn a name, and already it’s threatening to become the next major swell-maker in an extraordinary Eastern Pacific hurricane season. As of Monday morning, Polo was about 255 miles south-southeast of Manzanillo, Mexico, packing sustained winds of 65 mph and moving east at roughly 5 mph. NOAA’s National Hurricane Center said the storm was undergoing “significant rapid intensification,” with a small eye developing beneath deep convection. Forecasters described conditions as “ideal for explosive intensification” over ocean temperatures topping 30.5°C (86.9°F). The NHC expects Polo to become a hurricane Monday and potentially a major hurricane by Tuesday, followed by a sharp turn toward the west-northwest or northwest. Confidence in the exact track remains low, but the storm is forecast to stay near Mexico’s Pacific coast through midweek before moving south of Baja later in the week.…