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Winter Weather — West Slope Northern Sierra Nevada, California
September 21, 2017 · NOAA Storm Events record
Event narrative (NOAA)
An unusually early season snow storm brought slippery Sierra road conditions above 5500 feet. Snow was 6 inches deep at Sugar Bowl Ski Resort. I80 was held several times due to collisions, including a major accident involving 16 vehicles. One driver was killed in this accident. At Ebbetts Pass there were 6 ill-prepared hikers on the Pacific Crest Trail who were rescued by a deputy sheriff.
Other notable winter weather events in California
Source: NOAA/NCEI Storm Events Database. Deaths and injuries are those NOAA classifies as direct. Damage is the reporting office's estimate at the time and is not inflation-adjusted. This is a catalogue record, not a forecast.