I was just sent a link to an article on Surfbirds about the subspecies of Orange-crowned Warblers. The subspecies ?celata? seems to fit the bird in my photo quite well.
http://www.surfbirds.com/blog/northcoastdiaries/20778/OCWA%3A+more+than+you+want+to+know....html

I knew somebody would know!

Joseph Higbee
Spanaway, WA
Mailto: jvhigbee at hotmail.com