[IN THE CENTRAL CALIFORNIA & SIERRA NEVADA] IS CLOSED FROM 2 MI EAST OF KIRKWOOD TO 5 MI WEST OF PICKETTS JCT /CARSON PASS/ (ALPINE CO) - DUE TO LIMITED VISIBILITY - MOTORISTS ARE ADVISED TO USE AN ALTERNATE ROUTE CHAINS ARE REQUIRED ON ALL VEHICLES EXCEPT 4-WHEEL-DRIVE VEHICLES WITH SNOW TIRES ON ALL 4 WHEELS FROM 6.3 MI EAST OF HAM'S STATION (AMADOR CO) TO THE JCT OF SR 89 NORTH (ALPINE CO)