The upcoming holiday travel week in California is facing potential disruptions as a significant weather system is poised to deliver heavy rain and mountain snow across the state. Atmospheric moisture is expected to surge into California through the weekend, bringing with it periods of intense rainfall and snowfall, particularly in the Sierra Nevada. While the precipitation is much-needed to replenish the depleted Sierra Nevada snowpack, which currently stands at under 20 percent of its normal average, the intensity and duration of the storm raise concerns about travel conditions.