Amin Sider, 46, who is believed to be suffering from dementia or some other cognitive impairment, was last seen at 4733 Pacehaven Lane.
He is 5 feet 6 inches tall and weighs 150 pounds. He has short, black hair and hazel eyes.
Sider was wearing a black turtleneck, black jeans, white and blue sneakers and a camouflage jacket. He could be driving a silver, 2007 Land Rover with N.C. tag 17004112.
The vehicle has chrome rims and temporary registration. His direction of travel was unknown.
Anyone with information should call Detective E.A. Blemgren at the Wake County Sheriff's Office at 919-856-6800.
Developed in 2007, Silver Alert is a system that quickly notifies the public about missing endangered adults who suffer from dementia or other cognitive impairments, such as Alzheimer's disease.
It also allows caregivers and nursing homes to report a person missing. In the past, only a family member could report an adult missing.