With California’s wet season nearing its end, snow levels across the state remain disappointingly low, and state officials are warning that a lack of melt-off will mean another year of difficult water shortages.

Officials with the California Department of Water Resources, who are scheduled to conduct their monthly snow survey on Tuesday, will find snowpack in the state’s mountains measuring less than 65% of average for the date. The reading bodes poorly for the scores of reservoirs that fill with melted snow — the source of almost a third of California’s water.