Found in a friend's suburban yard. Other specimens were larger...but "got away". (You know, two or three feet long :-)
My friend speculated that the cross like pattern might be enough to ID it, so I searched BugGuide using the phrase "cross spider" and came up quite quickly with Araneus diadematus
, which I'm betting is correct. Here are some BG posts thereof:
I'm very inexperienced with spiders, so will appreciate helpful comments.