Something enormous has been moving quietly up the Pacific toward Southern California. Now, it’s here. An El Niño-fueled coastally trapped Kelvin wave is arriving along the Southern California coastline, potentially raising background sea levels another 6 to 12 inches for weeks or even months. Unlike a normal swell, there’s no giant wave face approaching shore. It’s essentially an enormous, slow-moving bulge in the ocean hundreds of miles across. View this post on Instagram “It is arriving now,” climate scientist Daniel Swain told the Los Angeles Times . And its timing is concerning. Southern California is already dealing with abnormally high ocean levels, severe beach erosion and repeated hurricane swells. In Santa Monica, water levels this week were running approximately 11 inches above NOAA’s predicted tides, according to the Times .…