The North American Aerospace Defense Command (NORAD) will be using their radar technology to track Santa’s route tomorrow evening. You can follow along online or by downloading the NORAD Tracks Santa app.
Unfortunately NORAD’s technology doesn’t enable them to predict the arrival time of Santa at individual houses:
“NORAD tracks Santa, but only Santa knows his route, which means we cannot predict where and when he will arrive at your house. We do, however, know from history that it appears he arrives only when children are asleep! ” [http://www.noradsanta.org/en/faq.html#f3]
More information about NORAD.