The National Weather Service San Juan warned on Tuesday, Oct 13, that a low pressure system will bring variable weather to Puerto Rico, with heavy rains and thunderstorms likely in the interior and western parts of the island. ^[1] The service put the probability of rain that day at 60% across Puerto Rico. ^[2] It tied the heavy rain to high atmospheric humidity and the low pressure system. ^[3] At the coasts, the service reported a moderate rip current risk on north and east facing shores. ^[4] For anyone planning a day at the beach, that is the line to read before heading out.