RENO, Nev. — Another round of snow snarled traffic with more than a dozen crashes on slippery roads in the Reno-Sparks area and triggered chain controls much of Tuesday on Interstate 80 in the Sierra.

The Nevada Highway Patrol reported at least 18 traffic accidents during the morning commute in Reno and Sparks, where up to 4 inches of snow fell in some areas.
One crash involved a state trooper’s vehicle. No serious injuries were reported.
Chains were mandatory with few exceptions for a 55-mile stretch of I-80 from the California-Nevada line west of Reno over the top of Donner Pass in Placer County California. But all controls had been lifted by mid-afternoon.
Ten inches of new snow was reported Tuesday above Lake Tahoe at Incline Village, and in the mountains north of Reno near Susanville, California where about 3 feet of snow has fallen since the storm began Saturday. Another 9.5 inches also was reported just south of Lake Tahoe at Myers, California.
Several areas around Lake Tahoe have received more than 2 feet of snow since Saturday, including 27 inches at the Mount Rose Ski Resort southwest of Reno.