pop up in west carol and mountains. this will be more heavy as advisory go through sunday. what is causing this? a closer look at this storm system. watch as it moves out, plunges southward and to the northeast. when a storm does this, it really does wreak havoc. it will pull cold area across midwest, great lakes. lake-effect will set up monday morning. then the cold air making a huge difference in the weather from this weekend until now. in terms of snow accumulation, if we can zoom in here to minnesota, we can see where the heaviest snow is anticipated. if you look at the legend, this means 10 inches to 20 inches are possible in the plains of the midwest, minnesota. this is an enormous amount of snow. with fierce wind blowing, zero visibility at times. travel will be treacherous across this region.