On the DTV, I still think its a shamb!
Under heavy cloud cover you wont get a signal. At least with UHF/VHF you could get a static picture when the weathers bad to know if the storms headin your way. Now you wont know?!
And from what Ive heard you also need a HD antanna, and an amplifier if you live more then 30-40 miles from the broadcast towers.
And thanks for the tat cudos grfnkl !