I've always been amazed how little snow it takes to keep the soil frost-free.   Three-four inches can keep single digit temps from freezing our soils.   

We're in northwest Michigan, only a dozen miles from Lake Michigan.  We get what they call "lake effect" snow.   Not as much as we did in the eighties.  Not nearly as much.  But enough that we still seldom get any freezing of our soils.  It's pretty rare.   And even when we do have bare ground and get a few inches of frost, the first snow storm will come through and within a week or so, the frost comes back out of the soil.  

So to answer your question.... I doubt you'll get any frost in your soils, if you indeed get the forecasted 3 to 5 inches of snow. 



gordon