A 50-year-old man died after losing control of his car in the rain on Highway 121 south of Sonoma on Saturday.
Mark Steven Heinemann was traveling southbound when his Porsche turned sideways on a curve, Highway Patrol Officer John Bigelow told Patch. The vehicle crossed into the northbound lane and was broadsided by an oncoming car.
Heineman, a Napa resident, died at the scene, Bigeolow said. His passenger and the driver of the oncoming Chrysler PT Cruiser were transported to local hospitals with minor injuries.
The accident happened just south of Viansa Winery, at about 2:30 p.m.
Bigelow said Heinemann had been driving too fast for the conditions.
The speed of the vehicle, was unknown, Bigelow said.
"Just based on what happened, it appears he was going too fast," he said.