Hi OneOfOne
Replies so far have pretty well covered your original post but I thought I would add my 2 cents anyway.
Provided you have configured your location correctly, the Heavens-Above web site predictions will be spot on.
There was a -8 pass over Newcastle last night and even though I was at work in an industrial area heavily polluted with artificial lighting it was brilliant!
Providing you are looking in the right area at the right time your eye will be drawn to the flare.
When you see one you won't be left wondering.
Good luck