I guess we are going to get to test out all of our "softly used" spills ways. Don Pedro is next on the list. The spillway has only been activated one other time. In 1997. They are required to open the spillway at 830 feet. They think it will be opened on Tuesday.
I believe this will cause a lot of downstream flooding. But this one only came onto my radar an hour ago.
The other issue with all these forecasts is - they initially thought this set of systems coming in would be a cold one. So rain would fall as snow and give them more time to cope. And exactly the opposite is happening. The storm is coming in from the South (L.A) via Hawaii.