SNOWBLOCKERS/roof vent/snow/ snow in vent/roof vent insert.
Do you have SNOWBLOCKERS in your vents?
Do you have water dripping from your ceiling, or light fixtures. or have dark spots on your ceiling thinking your roof is leaking. It maybe OLD MAN WINTER doing what he does best, blow snow up your vents!! You can install anytime to resolve your snow issue! Are you building a new home or installing new shingles/roof vents?
Make sure your roofer or builder installs SNOWBLOCKERS in your vents so OLD MAN WINTER doesn't get a chance to get your blood pressure up and cost you a lot or money and headaches.