Steady rain and windy conditions flooded several roadways early Friday and created slippery driving conditions as the commute hour got under way.
The CHP said there was flooding on northbound Highway 101 at Golf Course Drive, with reports of up to 6 inches covering the fast lane, authorities said.
Two vehicles driving just south of there near Railroad Avenue crashed because of wet conditions shortly before 6:30 a.m., sending one vehicle up to 150 feet off the roadway, the CHP said.
Standing water also was reported on Highway 116 at Mirabel Road, while a vehicle slammed into a utility pole at Sebastopol and Stony Point roads in Santa Rosa.
A vehicle ran off Napa Road and into a ditch near Burndale Road in Sonoma, the CHP said.