That should be OK. His signals are about 10 dB weaker than yours, but still very strong.
If it doesn't work, the upgrade would be the GE 24792 Attic Mount Antenna.
http://www.amazon.com/GE-24792-Anten.../dp/B00DNJZ58M
The next upgrade would be the Antennas Direct C2V.
https://www.antennasdirect.com/store...-Complete.html
http://www.bestbuy.com/site/antennas...=1218809260470
but there is no antenna that can "see" through trees.