* WHAT...Heavy snow expected. Total snow accumulations between 8 and 16 inches. Total snow accumulations for parts of southeastern Essex County, New York and southern and central Vermont between 13 and 19 inches, locally up to 2 feet possible along the southern Greens. * WHERE...All of northern New York and Vermont. * WHEN...Until 1 AM EST Tuesday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Travel could be very difficult to impossible. The hazardous conditions will impact the Monday morning and evening commutes. * ADDITIONAL DETAILS...Snowfall rates are likely to exceed one inch per hour this evening into the overnight hours in the Adirondacks and much of Vermont. With the potential for locally 18 inches of greater, like in southern Vermont, ensure adequate ventilation when heating homes or using generators to avoid carbon monoxide risks.