I dont think it is weather. Its not that i have a weak signal. ABC & PBS are the weakest signals that i receive (30% - 45%) but CBS, NBC, FOX & WB are all between 75% - 90%. It seem like either my tv or the broadcast station is confused about weather it is an HD program or not. For instance when The Two Towers came on it had a picture and the signal was about 80% but there were black line on the sides making it 4:3 and not 16:9. Then the picture would go out, not the sound, and then it would come back on. It did this for about 5 min. then the picture went out and it was only sound. So then i turned over to ABC because they were showing Pearl Harbor in HD and it came in perfect @ 40%. I think it may be the broadcast station. I am getting my signal from Birmingham, AL. If there is anyone in the B'ham area let me know if you were able to pull in The Two Towers Sunday night on channel 21.1. I may not be expalining this very well but maybe someone can figure this out.