In general, if it's actively snowing, and it's 'sticking' to the roads, you should not be driving on it at all.
The snow reduces visibility.
Accumulating snow is always slippery.
Most snow-accidents happen while it is snowing. And even if you have super-duper winter tires and 4 wheel drive. That doesn't stop someone else who doesn't have those things from crashing into you.
And if there's an accident, you now put all the first responders in a dangerous situation.
Once it stops snowing and plowing and salting takes place, then you can drive on it... carefully. And if you're in a state that doesn't have plows or salt, wait for the natural above-freezing temperature of the ground and air melt it away.