In California, April 1st is considered the peak of the snow year. After April 1st, the snowpack typically begins to diminish. Of course there can be late season snowstorms but as the weather begins to warm and the days lengthen, the snow will begin to melt.
Here is another perspective on the snowpack in Northern California and the Southern Oregon Cascades. As the image snows, much of the region is 'Much Above Normal'.
The mountains of Washington State, however, have developed a snow pack that is running about 75% of average.