How high up were you? White hair isn't necessarily terrible if steep angle. Was the blood bright red or brownish red?
If liver, wait at least 4-6hrs. If gut, wait as long as possible prior to the rain moving in. 12hr minimum unless forced to earlier due to rain.
If you don't bump the deer, there is a good chance it will bed fairly close (within a couple hundred yards). IF you get out looking and bump a liver or gut shot deer, they can go a LONG way. 1/2 mile or more I have seen them bumped.