RIVERSIDE (CNS) - A 66-year-old man, who suffers from a medical condition and may become disoriented, went missing in Riverside this afternoon, prompting a Silver Alert to be issued in six counties.Jimmie Johnson was last seen about 5 p.m. near Arlington Avenue and Tyler Street, according to the California Highway Patrol, which issued the alert on behalf of the Riverside County Sheriff's Department.Johnson may be wearing a dark blue shirt with beige and burgundy stripes, red pajama bottoms, brown slippers and a black hat, the CHP reported.Johnson, who may become disoriented, is described as 5 feet, 8 inches tall, 180 pounds, with black hair and brown eyes, according to the CHP.Silver Alerts were also issued Wednesday evening in Riverside, Los Angeles, Orange, San Bernard
