How full will Lake Shasta, California's largest reservoir, be on 30 September 2025?

Water storage in Northern California reservoirs, including Lake Shasta, was above normal as of the end of 2024 (Active NorCal, Newsweek). The question will be suspended on 30 September 2025 and the outcome determined using data as reported by the California Department of Water Resources (California Data Exchange Center - Lake Shasta, divide the "Storage" figure by the "Total Capacity" figure, both of which are in acre feet [AF]). Click the calendar icon next to "Change Date" to look at historical data. On 30 September 2024, Lake Shasta had 2,766,120 AF of Storage with a Total Capacity of 4,552,000 AF, meaning it was 60.767% full. Confused? Check our FAQ or ask us for help. To learn more about Good Judgment and Superforecasting, click here. To learn more about how you can become a Superforecaster, see here. For other posts from our Insights blog, click here.