(Portland, OR)  --  Police are searching for a Portland woman who has been missing since Saturday.  Police say Alissa McCran finished a run in the area of Portland Adventist Medical Center Saturday morning before leaving her home in the Powellhurst-Gilbert neighborhood.  She hasn't been seen or heard from since.  She is five-three with black hair and brown eyes.  Her car is a Mazda CX7 and it's also missing.  It has Oregon license plates and a large Portland Timbers "T" sticker on the back window.