Snow tires, or at least all seasons are essential. Separate winter/summer tires make the most sense for a sports car. Take it slow, stay in other peoples tracks as much as possible, slow down as much as possible without braking and don't accelerate quickly, and if it's a manual try to rev match. If you do skid turn into it, and take the gas off, try to avoid jamming on the brakes. As stated by others, it's dangerous in a place that normally doesn't get snow because even if you know what you are doing, the chance of being hit by someone else is very high.
I rarely have issues in slow below 4" (ground clearance) with snow tires.
