Late Sierra storm threatens feet of snow, travel impossible
Could a late-season Sierra storm upend weekend travel and recreation plans? Residents and visitors are being urged to prepare as a powerful system aims at the mountains. Sierra storm warnings are now central to planning across Northern California.
Official statements said a winter storm watch covers Friday evening through Saturday evening above 4,500 feet on the west slope of the northern Sierra, including Interstate 80 and Highway 50. Snow is predicted to be heaviest midday Saturday through midday Sunday, which could make travel “very difficult to impossible,” officials warned.
Forecast totals have been trending upward. Two feet of snow is possible along I-80 over Donner Summit above 4,500 feet. The highest peaks, including ski resorts, could pick up more than 3 feet of snow, with localized totals reaching 4 feet. The snow line is expected to be above pass level Friday morning before falling below 6,000 feet Saturday and eventually down to about 4,000 feet Saturday. Mount Hamilton in the Diablo Range east of San Jose could even get a dusting Sunday. A separate winter storm watch applies to the Lake Tahoe area; the Highway 89 corridor along the west shore of the lake could receive about a foot of snow, while Kings Beach and Incline Village may see closer to half a foot. Winds could gust up to 90 mph along the Sierra crest Saturday afternoon.
This Sierra storm could strain mountain road crews and ski-area operations. With gusting winds and rapid accumulation, plowing and avalanche mitigation will be more complex, and local emergency services may face heavier demand during the worst of the precipitation.
Adjust plans now and travel only if necessary. Road closures and delays are likely as crews respond to the incoming storm.
Looking back puts the current threat in perspective. In May 2024, a storm dropped more than 2 feet of snow at the snow lab near Donner Summit, marking that location’s snowiest day of the season. Historical records are more dramatic: April 1880 brought accounts of up to 16 feet of snow at Donner Pass in a four-day span. Total precipitation since Oct. 1 is near normal at the snow lab, though the snowpack is practically nonexistent in large part because of a record-shattering March heat wave that forced early closures of Sierra ski resorts. March finished as California’s warmest and driest on record.
Even with additional storms possible through mid-April, recovery of the meager Sierra snowpack to near normal appears unlikely. The mountain storm pattern that delivers heavy, localized snowfall can help pockets of the range but is unlikely to erase the broader shortfall. Water managers and recreation businesses will likely watch totals closely, balancing short-term gains against a season still shaped by an unusually warm March.
As the system approaches, the Sierra storm remains a clear threat to travel and mountain operations. Officials urge caution and flexibility: expect strong winds, heavy snow, and travel conditions that may become “very difficult to impossible,” especially above 4,500 feet. US News Hub Misryoum will continue to monitor conditions and update readers as more details emerge.