not sure if i am understanding, is it the force at which the snow it hitting the tree that you are concerned with?

I wouldn't be concerned about the force of the snow hitting the trunk. You may want to stake the trees if they are not already, that would be my only concern. you can do a tree wrap or white corrugated tube to give some protection to the trunk. If you use a wrap, you must remove it when the tree breaks dormancy, or you will create a pocket for bacteria and fungus to grow (as well as a tight wrap will constrict the tree as it tries to grow). The most common form of protection is to water down some latex paint (50-50) and paint the trunk, though this isn't really for your question, it is a good practice. Personally i like the corrugated tubes, making sure that there is some room for growth. I prefer these since i have killer rabbits that like to chomp on baby trees and it provides a barrier against them.

I have a row of fruit trees about 5 feet in from my sidewalk, and throw snow at them whenever we get hit. My Juliet cherry is maybe 3/8" thick at the trunk now, and i have had no issues with the snow blower. Most of the other trees went in between 5/8" thick and 1" thick, and none of those have had issues either.

As a side note, i will often grab a shovel and try to throw more snow around the base of the trees as a general rule of thumb is 1" snow = 1 R value of insulation. Just as extra protection in case of -20F weather.

The only problem with too much heavy snow on little trees...sometimes branches can brake off. Staking is a must for some years...when trees are lager they can take more snow when scaffolding branches are cut higher up...not taking the brunt force of heavy wet snow load on top, especially from a blower!