You either need to separate the attic spaces with an air barrier of some kind never tried it or close off the lower vents that are intaking and add as much ventilation to the upper roof as you block off on the lower.
Snow blocking roof vents.
Static vents often protrude from roofline thanks to special covers intended to keep all precipitation rain sleet hail and snow from entering the attic.
Homeowners can choose from a variety of.
Your plumbing vent pipes sit exposed on your house s roof where objects such as tree twigs tennis balls and even snow may fall down the pipes.
If enough snow falls in your area during a short period of time the pipes may become clogged with the snow which may freeze in the vent pipe.
Some companies such as snowvenco are developing roof exit vents designed to prevent wind blown snow leakage into the roof but those vents may still become snow covered and thus snow blocked.
Polycarbonate snow guards can also be referred to as.
Snow jax snow stops snow guards snow brackets snow blocks or snowguards and typically are installed on commercial metal roof buildings.
Also forgot to mention make sure that blown in insulation is not blocking the soffit ventilation.
And it s a good quality ridge vent but it has the added addition of a filter material that is in the baffle part of it in the porous part of it so that that stops the snow from doing exactly what it s doing in your case which is blowing in.