CISCO GROVE – Westbound Interstate 80 near Cisco Grove closed Wednesday afternoon when a big rig flipped over and blocked the lanes, the California Highway Patrol said. 

The CHP said a big rig crashed and flipped over, causing the trailer to separate around 4 p.m. 

The driver suffered minor injuries.

It's unknown how long westbound I-80 will remain closed for. Traffic was diverted to Hampshire Rocks Road and back to I-80 at Cisco Grove.

The crash came as a storm dropped rain and snow in the Sierra. 

Trucks are being screened for chains on westbound I-80 about five miles west of Reno. Eastbound trucks are being screened in Applegate.