How do you stop spindrift in a blizzard in a Pyramid tarp

I have a GoLite Hex 3 and would like to experiment with it in a full on blizzard in the snow.
I am wondering, how do you stop spindrift coming in?

Has anyone successfully used one of these shelters consistently in big snow storms?
I am not talking about the odd 12 inches of snow one evening. I mean a full on blizzard.

I have a BPL bivy that I am sure would keep the snow off me but snow piling up inside doesn't sound great.