The Tv stations are of moderate signal strength to weak signal strength. The Tv stations to receive are on the East side of the building of the direction of East.
A antenna outside on the west side will likely improve reception some.
However the best reception will happen on the East side of the building. A antenna on the East side of the building should be up as high as possible. Not mounted just above the ground.
Here is the first choice for a antenna on the outside of the East side of the building , Winegard HD7000R antenna with a Winegard AP8700 preamp aimed at about 90 degree magnetic compass , (East).
The second choice on the outside of the East side of the building is a Terk HDTVo antenna aimed East.
The third choice on the outside of the East side of the building is a Antenna Craft HDX1000 aimed East.
The fourth choice is a Terk HDTVa antenna put in the window or close to the window that faces East.
Here is how to aim indoor and outdoor antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
Here are places to buy antennas and etc. ,
http://www.solidsignal.com ,
http://www.amazon.com ,
http://www.winegarddirect.com ,
http://www.antennacraft.net.