Extreme heats leaves California mountains in a snow drought

Key Points:

• California’s Sierra Nevada snowpack has reached a record low, measuring only 18% of the average on April 1, with surveyors finding virtually no measurable snow in key areas like near Lake Tahoe.
• The early and rapid snowmelt is attributed to record-breaking heat and is linked to climate change, which is causing more precipitation to fall as rain rather than snow, accelerating runoff and drying forests earlier than usual.
• Despite low snowpack, major reservoirs in Northern California remain nearly full due to average rainfall this winter and previous wet years, but experts warn this situation may not persist in future years without sufficient rain.
• The diminished snowpack threatens natural ecosystems, increases wildfire risks, and challenges water management, prompting calls for new infrastructure, water conservation, recycling, and adaptive strategies to cope with changing runoff patterns.
• Similar snowpack declines are impacting the Colorado River watershed, crucial for Southern California’s water supply, with snowpack levels there also at historically low levels amid ongoing megadrought conditions.