In our area a 100% chance of snow in the forecast usually means a light dusting. A prediction of a 2-4 inch snowfall is the lead story on the local news. What's funny is that they will show a map with with the predictions of which parts of SE Minnesota will get the "heavier" snowfall sometimes breaking it down into half inch segments. I haven't done the math but their accuracy is about that of the flip of the coin. Of course they usually include a strong recommendation for packing your winter survival gear, and to dress warmly but mostly to prepare for the pending armegedon.
I can't imagine the fear and devistation they would project if a classic Michigan lake effect snow event was approaching.