Weather Question?

With this winter weather on the way there is suppose to be a
bunch of snow with it. I have always been told that the Snow
is a bad thing.

With the lakes (here in southern MI) having very little ice.
Then getting a bunch of snow on them forms an Insulation
and won't freeze proper. The temps could drop down into
the single digits but it still doesn't form more Ice.

Any truth to what I have been told or is this an old wifes tale???