A fierce atmospheric river blasted the northern and central Sierra overnight, dumping several feet of snow to elevations above 8,000 feet and bringing a slushy mix of rain and snow to lower elevations. On State Route 88 over the Carson Spur, Caltrans snow ploughs faced drifts that rose well above the top of their trucks. As of 11:30 a.m., the road still wasn’t clear. In the mountains, ski resorts shuttered lifts due to the high volume of snow. Squaw Valley and Alpine Ski resorts ceased operations at 3 p.m. due to high avalanche conditions.