Shift from El Niño to La Niña expected in coming months

The El Niño pattern of the past year, which resulted in above-average snowfall and rainfall in California, has shifted to a "neutral" state, ahead of a predicted shift back to a La Niña pattern later this year, and into the winter.
Shown below in warm (red) and cold (blue) periods in degrees Celsius of Oceanic Niño Index variation