The main group of Tv stations/channels is to the north west at about 325 degree magnetic compass.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
The Tv -->Must Channel Scan for Digital Broadcast Tv Channels sometimes named the 'Air Channels' or 'Antenna Channels' in the Tv setup menu because the Tv transmissions travel through the air from the transmitting antenna to the receiving antenna.
DO NOT channel scan for cable tv channels.
Do not buy the HDTVa amplified antenna , the Tv transmissions at your location are very strong and will overload the amplifier and be the cause of bad or no reception.
Here are are places to buy the HDTVi Non amplified antenna.
http://www.solidsignal.com.
http://www.amazon.com.
FRY's electronics.