According to the California Highway Patrol Traffic Incident Information Page, California State Route 128 is closed and signs are being placed on the roadway to notify drivers of the closure.
The Caltrans Quickmap indicates the closure extends from Route 1 to Flynn Creek Road and is expected to end at 12:01 p.m. on January 17, 2021.
A dispatcher at the Ukiah’s California Highway Patrol office confirmed the highway is closed due to flooding.
I was there when he closed it and by the looks of the water near the entrance to the ocean, it does not have to come up much higher to break through the sand dam and drain. I expect it to be open in the morning.