“This pulse, known as a Kelvin wave, will boost the ocean’s height across an area extending 12 to 18 miles offshore. It is coming on top of several other factors that are raising the seas off California and increasing the threats from coastal flooding, erosion and saltwater intrusion”
nytimes.com
See How El Niño Is Washing Ashore in California
An enormous pulse of wave energy will soon reach Southern California and continue north, raising sea levels by half a foot and increasing threats from swells and tides.