Here in WNY, the angle of my earc dish is so steep it rarely accumulates and snow. The only time I have lost signal is if it's a heavy wet snow. I don't think I've ever lost signal for much more than a hour. My dish is on the edge of the roof, 2 stories up, so I can't reach it.
If your dish is low enough, people have suggested using a super soaker water gun filled with hot water to melt the snow.
If your dish is low enough, people have suggested using a super soaker water gun filled with hot water to melt the snow.