I dropped Comcast at the beginning of the year. Been watching the local stations using a chimney mounted 25 year old Radio Shack antenna connected to my Tivo via the 45 year old twinlead installed when the house was built. I'm 8 miles due north of the towers in a heavily wooded subdivision just south of Cleveland Rd. On calm days, I'd get all the local channels just fine but at the slightest hint of lousy weather (windy and/or rainy) and 34 and 57 (and sometimes 22) would suffer pixellation and/or audio dropouts, often to the point they'd be unwatchable.
This past week I replaced the twinlead with RG6 and because I had some extra length, moved the antenna up a couple feet (from maybe 25' to 27' above grade.) The antenna is still well below the tops of the mature oak trees in my line of sight to the towers. I have not had any lousy weather yet to do a test but the signal strength through the antenna input of my Tivo is now 100% on all 8 channels. With the old twinlead, I got the max signal only on 16, 22, and 28. I also viewed the SNR and signal strength through my TV's diagnostic menu. SNRs ranged from 30 on 57 and 69 to 33 on 22. The signal strength was 95 on 57 and 69 and 98 on all the others. Won't know for sure if this will improve the lousy weather performance but based on the apparent signal strength improvements, I'm hopeful.