Drivers could encounter black ice and blowing snow during the morning commute Friday.
Gusty winds could cause blowing and drifting snow across the road, especially in open areas.
Temperatures are expected to turn much colder Friday. Wind chills Friday morning will be in the single digits.
A car slid off the road overnight on I-680 southbound, near Market Street. Other areas of slippery spots have been reported across the Valley.