The 8-Station Index Reaches 100% of Normal

The 8-Station Index has reached 100% of normal for the first time this winter.  

The 8SI Sierra Nevada Precipitation Index is arguably the single most important metric of California water supply. It’s a snapshot of the overall wetness that includes both snowpack and rainfall for the major watersheds of the upper Sacramento, Feather, Yuba, and American Rivers. These in turn feed into some of the largest of the California reservoirs (i.e., Shasta, Oroville, and Folsom).

As of February 21, 2024, the seasonal (i.e., July 1 to June 30) rainfall was 35.14”, compared to a normal of 35.12” for this date. [Normal for the entire July 1 to June 30 season is 52.81".]

Jan Null, CCM
Certified Consulting Meteorologist
Golden Gate Weather Services
Office: (650) 712-1876
Mobile: (510) 928-2824