We have had cool summer and the strengthening La Niña will being more cool weather in California. Watts Up With That has put up a dedicated page for tracking the ENSO/Sea Level/Sea Surface Temperature information.
Here is the latest information on the expanding La Niña.(Click for a larger image)
Here is a profile of the major differences between an El Niño and La Niña weather patterns. (Click for a larger image)
Northern California is on the cusp of cold and wet. These zones are not static, they expand and contract. Stay Tuned!