With all do respect, RatherbeFlying,
it seems you are not on the professional side (neither in the air nor on the ground). So far regulations are strict and there is no room for estimating if it s "puffy" snow that will blow away or it is 1mm of ice that will get you down faster then you expect.
It is not allowed to take off with anything on your lifting surfaces. Period.
Please check the appropriate FARs, JARs etc, if you know what I mean. No derogatory remarks, just my point of view.
Regards