Giga5 @NegativeMatter You suffocate on snow because it is preventing air from reaching your lungs simply by covering you mouth and nose. Drowning is different, because it actually floods your lungs. So unless the snow melted really fast, it wouldn't be drowning.
Giga5 @NegativeMatter I dont think that drowning is overdosing on water, because you would die from the salt content in your blood changing due to all the water. Drowning is not being able to breath, and typically you take 'doses' of water through the mouth