California's snowpack historically peaks around April 1 across the Sierra Nevada and southern Cascades, but when state measurements come in just over 3 weeks, there might not be much snow left to measure. Well above normal temperatures are expected for at least the next 10 days, including an extreme heatwave next week that could threaten all-time March highs and potentially send temperatures as high as the upper 60s or even low 70s in Tahoe. California's snowpack peaked on Feb 25 at just 61% of the April 1 normal, over a month earlier than usual. Statewide snowpack could be below 30% of normal on April 1, which could rank it among the top 5 smallest spring snowpacks on record.