Atmospheric river storms pounding Northern California with rain have also brought epic snow to the Sierra. Meteorologist Jim Mathews says that since 1950 only six years have surpassed the total “snow water content” that California has right now. The state’s snowpack — measured using the snow’s water content — is at 130% of its usual level on April 1 (after that date, the snow tends to begin to melt). It’s at 150% of the amount that’s normal for this time in February.