The weather forecast for Wednesday is as much about the pounding waves as the rain.
Large northwest swells are forecast to arrive between 7 a.m. and 9:30 a.m. all along both the coast and inland bay areas. They could be as high as ten to 13 feet near San Francisco. The swells can be blamed on both a powerful weather system that set to arrive Wednesday morning and a astronomical event called "king tide."
King tides come in twice a year when the gravitational forces of the sun, the Earth and a full moon are all in alignment.
The swells will cause some large breakers along the beaches and could cause minor coastal flooding as well, according to the NWS.
Along with the rain and the waves, the weather system is also bringing gusty winds. Anyone outside Tuesday can atest to the windy conditions that brought gusts up to 40 mph. Those winds will remain with us through the night.